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New State Grid Three-Phase Smart Meter
ky003
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2 Main functions of the instrument

2.1 Energy measurement

The meter can measure forward and reverse active power, forward and reverse apparent, 1, 2, 3, 4 quadrant reactive power and A, B, C phase active and reactive power, and can set combined active and reactive power character words The positive and negative active energy and the four quadrant reactive energy are selectively added and subtracted to generate combined active power, combined reactive power 1, combined reactive power 2 and electricity.

All kinds of electricity can be measured in time-sharing according to the total and maximum 4 time periods (the electricity in three phases of A, B and C is not measured in time-sharing).

It can store electricity data for 12 settlement cycles.

For forward and reverse active power and forward and reverse apparent, 1, 2, 3, and 4 quadrant reactive power and A, B, and C phase active and reactive power, the effective energy value range is 0 ~ 999999.99, and the unit is kWh or kvarh.

For combined active power, combined reactive power 1, combined reactive power 2, the effective energy range is –799999.99 ~ 799999.99, and the unit is kW? H or kvar? H.

The factory default for electrical energy display is 2 decimal places.

 

2.2 Time slot rates

This watch can be set with two sets of time zone tables and two sets of daily time table programs, and the respective switching time (year, month, day, hour and minute) of the two programs. The meter runs the first set of time zone schedules and the first set of daily time schedules by default. After the meter runs to the switch time of the time zone schedule, it switches to another set of time zone schedules. A set of daily timetable scheme operation; set the switching time of two sets of schemes again, after the meter runs to the time zone table scheme switching time, switch to the first set of time zone table scheme operation, after running the day timetable scheme switch time, press A set of daily schedules are in operation. If the switching time of the two sets of time zone table and the daily time table scheme are set to "FFFFFFFFFF", the two sets of annual time zone table and daily time table cannot be switched.

After the time zone table plan and the daily time table plan are switched, the switching time is cleared.

Maximum 8 rates. Each set of time zone schedules can be set with a maximum of 14 time zones, the start date of each time zone, and the number of day time slots used. Each set of daily schedules can be set up to a maximum of 8 daily schedules, a maximum of 14 daily schedules, and the start time and usage rate of each schedule. The minimum time interval is 15 minutes, and the time interval is greater than the actual demand period value, which can be set across zero.

Public holidays can be set, the date and time table number of each public holiday.

Weekdays can be set, controlled by the characteristics of weekdays, and the table number of the day period used for weekdays can be set.

If the public holiday overlaps with the weekly holiday, the daytime schedule number of the public holiday is adopted.

Hundred-year calendar, time, leap year automatically switch.

If the rate number of a certain period in the daily time table is greater than the number of rates, or the number of rates is 0, the electric energy of this period is counted as rate 1.

 

2.3 Demand measurement

It can measure positive and reverse active power, positive and reverse apparent, 1, 2, 3, 4 quadrant reactive power, combined reactive power 1, 2 maximum demand and occurrence time.

Demand period and slip time can be set within the range of 1 ~ 60min minutes, but should meet: demand period is greater than slip time and an integer multiple of it, demand period can be in 5, 10, 15, 30, 60min Choice; slip time of slip type demand period can be selected in 1, 2, 3, 5min. The demand period shall be an integer multiple of 5 of the slip time, and the multiple shall be 15 or less.

When voltage line power-on, period conversion, clearing, clock adjustment, demand period change, power flow direction conversion, etc., the energy meter starts demand measurement according to the demand period from the current moment, when the first demand After the measurement period is completed, the maximum demand recording starts at the slip interval. Among them, when the time period conversion occurs, the total demand continues to be measured according to slip, and the time-shared demand restarts to be measured according to the demand period.

During an incomplete demand cycle or when modifying the demand cycle, no record of the maximum demand is made.

It can store the maximum demand data for 12 settlement days.

Demand display decimal places default to 4 decimal places.

 

2.4 settlement function

In addition to the current total and time-shared power consumption, maximum demand and its occurrence time of active and reactive power, this table also stores the historical data of the last 1 to 12 settlement cycles (including combined active power, forward and reverse active power, combined Reactive power 1 and combined reactive power 2, four-quadrant reactive power, active power of each component, total reactive power and time-sharing power; forward and reverse active power, combined reactive power 1 and combined reactive power 2, maximum demand of four-quadrant reactive power And its time of occurrence.). When the meter clock reaches the settlement point, the meter performs settlement. When the energy meter is settled, the current electricity amount, maximum demand and its occurrence time are first stored in the previous settlement date, and then the current maximum demand and its occurrence time are cleared, and the cumulative unit for calculating the demand is cleared. Start the calculation again.

If the power meter crosses the settlement point after power-off, the power meter will not make up for settlement after power-on.

Up to three billing days can be set per month, and the first billing day is enabled by default. If the value of the monthly billing day is FFFF, this billing day is not set.

Demand settlement is settled only once on the first settlement day of each month. If other settlement days are activated and the settlement is made at the settlement point, the corresponding demand data for this settlement day will be supplemented with FF.

The voltage qualification rate is settled only on the first settlement day. When other settlement days are enabled for settlement, the voltage qualification rate is not settled.

 

2.5 Event record

Pressure loss: the total number and cumulative time of pressure loss, the time and end of the last pressure loss and the total number and cumulative time of pressure loss of each phase, the time of the last 10 pressure loss, the end time, and the energy during the pressure loss Indication and other data.

Starting condition: The voltage is less than NN% Un (NN is the threshold value of voltage loss starting voltage), and the current is greater than NN.NNNNA (NN.NNNN is the voltage loss starting current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than 85% Un, or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Undervoltage: It can record the total number and accumulated time of undervoltage of each phase, the time of the last 10 undervoltage occurrences, the end time, the energy indication during the undervoltage and other data.

Starting condition: The voltage is lower than NN% Un and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than NN% Un or the maximum voltage is less than the critical voltage or power down.

Judgment delay: 30S.

Overpressure: It can record the data of overpressure of each phase of A, B and C in the last 10 times.

Starting condition: The voltage is greater than NNNN% Un (overvoltage judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is less than the overvoltage judgment threshold, or the voltage is less than the critical voltage, or power down.

Judgment delay: 30S.

Phase failure: It can record the total number of times of phase failure of each phase, the cumulative time, the occurrence time, end time of the last 10 phase failures and the corresponding energy indication data.

Starting condition: The voltage is less than the critical voltage NN% Un, and the current is less than NN.NNNNA (phase start current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than the critical voltage, or the current is greater than the phase-off start current, or the voltage is lower than the critical voltage, or the power is turned off.

Judgment delay: 60S.

Total voltage loss: The total number and total time of total voltage loss can be recorded, the occurrence time, end time and the latest current value of the last 10 total voltage loss.

Starting condition: The voltage of each phase is lower than the critical voltage NN% Un, and the maximum current is greater than 5% In.

End condition: The maximum voltage is greater than the critical voltage, or the maximum current is less than 5% In, or power down.

Judgment delay: 60S.

Voltage reverse phase sequence: It can record the total number of voltage reverse phase sequence, cumulative time, and the energy indication value of the last 10 times and the end time and period.

Starting condition: voltage reverse phase sequence occurs and the minimum voltage is greater than the critical voltage.

End condition: The voltage reverse phase sequence ends and the maximum voltage is less than the critical voltage or power down.

Judgment delay: 60S.

Current loss: It can record the total number of times of current loss of each phase, the accumulated time, the end time of the last 10 current losses, the energy indication during the current loss and other data.

Starting condition: The phase current is less than NN.NNNNA (loss start current), and the remaining phase currents are greater than NN.NNNNA (loss current end), and the maximum voltage is greater than the critical voltage.

End condition: The phase current is greater than NN.NNNNA (loss start current), or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Over-current: It can record the over-current data of the A, B and C phases of the last 10 times.

Starting condition: The current of a certain phase is greater than NNN.N% Ib (overcurrent judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The current of a certain phase is less than the over-current judgment threshold, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Current interruption: It can record the total number and cumulative time of current interruption of each phase, the occurrence time, end time of the last 10 current interruptions, and the energy indication value during the current interruption.

Starting condition: The voltage is greater than NN% Un and the current is less than NN.NNNNA, and the maximum voltage is greater than the critical voltage.

End condition: voltage less than NN% Un or current greater than NN.NNNNA or maximum voltage less than critical voltage.

Judgment delay: 30S.

Power flow reversal: It can record the total number of times and cumulative time of current reversal in each direction, the time of the last 10 times of current reversal, the end time, and the energy indication during the voltage loss.

Starting condition: When the angle between the voltage and the current is greater than 90 degrees and less than 270 degrees, the current reverses. (When judging the reverse flow of a certain phase, the active power of this phase should be greater than NN.NNNN kw)

End condition: phase angle greater than zero degrees and less than 90 degrees or phase angle greater than 270 degrees and less than 360 degrees or voltage less than 10V or current less than starting current or power down

Judgment delay: 60S.

Voltage Qualification Rate: It can record the statistical data of voltage qualification rate of the total, A, B and C phases of this month and the previous 12 months.

Voltage exceeds the upper limit

Starting condition: The phase voltage is greater than the qualified upper limit NNN.NV and less than the assessed upper limit NNN.NV.

End condition: The phase voltage is less than the qualified upper limit NNN.NV, or greater than the upper assessment limit NNN.NV, or power off.

Qualified voltage

Starting condition: The phase voltage is greater than the qualified lower limit NNN.NV and less than the qualified upper limit NNN.NV.

End condition: The phase voltage is less than the qualified lower limit NNN.NV, or greater than the qualified upper limit NNN.NV, or power off.

Low voltage limit

Starting condition: The phase voltage is less than the qualified lower limit NNN.NV, and greater than the evaluated lower limit NNN.NV.

End condition: The phase voltage is greater than the qualified lower limit NNN.NV, or less than the assessed lower limit NNN.NV, or powered off.

Judgment delay of voltage qualification rate: 30 seconds.

Voltage unbalance: can record the last 10 voltage unbalance event records.

In a three-phase power supply system, the voltage unbalance rate is:

Starting condition: voltage imbalance rate is greater than NN% (voltage imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The voltage unbalance rate is less than the upper limit value of the voltage unbalance, or the voltage is lower than the critical voltage, or the power is off.

Judgment delay: 30S.

Current imbalance: can record the last 10 current imbalance event records.

In a three-phase power supply system, the current unbalance rate is:

Starting condition: The current imbalance rate is greater than NN% (current imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The current unbalance rate is less than the upper limit value of current unbalance, or the voltage is lower than the critical voltage, or power off.

Judgment delay: 30S.

Overload: Record the total number of times and total time of each phase overload, and the duration of the last 10 overloads.

Starting condition: The active power of a phase is greater than the upper limit of active power, and the maximum voltage is greater than the critical voltage.

End condition: The active power of a phase is less than the upper limit of active power, or the maximum voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Active power demand overrun: can record the last 10 positive and negative active power demand overrun data.

Starting condition: Active power demand is greater than NN.NNNNkW (active power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Active demand is less than the upper limit of active power, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Reactive Power Demand Exceeding Limit: The data of the last 10 times 1, 2, 3, and 4 quadrant reactive power demand exceeding limits can be recorded.

Starting condition: reactive power demand is greater than NN.NNNNkW (reactive power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Reactive power demand is less than the upper limit of reactive power, or the voltage is less than the critical voltage, or power off.

Judgment delay: 30S.

Total power factor exceeds the lower limit: the total number of total power factor exceeding the lower limit and the total accumulated time can be recorded, the last 10 total power factor exceeding the lower limit occurs at the time, the end time, and the total power factor exceeding the lower limit of the energy indication data.

Starting condition: The total power factor is less than N.NNN and the maximum voltage is greater than the critical voltage.

End condition: The total power factor is greater than N.NNN and the maximum voltage is less than the critical voltage.

Judgment delay: 30S.

Power-down: The total number of power-downs can be recorded, and the end time of the last 10 power-downs.

Time slot and holiday programming: record daily time table, annual time zone table, weekly holiday, total number of holiday programming and the latest 10 times of programming time, operator code, pre-programming data.

Active and reactive power combination programming: record the combined active power, combined reactive power 1, combined reactive power 2 total programming times and the last 10 times of programming time, operator code, data before programming.

Settlement day programming: record the total number of programming on the settlement day and the last 10 programming times, operator code, pre-programming data.

Programming record: It can record the total number of programming, the time of the last 10 programming, the operator code, and the data identification of the programming item. Press the programming switch to enter the programming state and program the meter, and press the programming switch again to exit the programming state. This process is recorded as a programming record, and the programming record records the last ten data identifiers of programming.

Time calibration: It can record the total number of time calibrations, the time of the last 10 time calibrations, and the operator code. Broadcast time is not recorded in the school time record.

Open cover: record the total number of open covers, the occurrence and end time of the last 10 open cover covers.

Opening end cover: It can record the total number of openings of the terminal end cover, the occurrence and end time of the last 10 opening button cover events.

Meter reset: permanently record the total number of meter resets, the time of the last 10 meter resets, the operator code, and energy data.

Demand reset: record the total number of times demand cleared, the last 10 times the demand cleared, the operator code and other current demand indication data.

Event clearing: It can record the total number of event clearing, the time of the last 10 event clearing, operator code and event clearing data identification code.

Closing and closing events: It can record the last 10 closing and closing events, and record the occurrence, time and important electrical energy of the closing and closing events.

 

2.6 Meter reset

The meter clears and clears the electric energy, maximum demand and occurrence time, freezing amount, non-permanently recorded part of the event record, load record and other data in the energy meter.

The meter reset must be used in conjunction with the encryption machine and the corresponding authorization password is required. When the command is executed, the energy meter should ensure that the record of the meter reset event is not cleared and automatically save the corresponding data of the event.

Able to permanently record the total number of meter resets and the previous 10 meter reset data.

 

2.7 Demand reset

Clear all the maximum demand and occurrence time data recorded this month in the table.

Demand reset must be used with the encryption machine and the corresponding authorization password is required.

It can record the total number of demand clearing events and the data of the previous 10 demand clearing.

 

2.8 Event reset

Clear all the data stored in the energy meter (except for permanent records) or certain types of event record data.

The event reset must be used in conjunction with the encryption machine and requires the corresponding authorization password.

It can record the total number of event clearing events and the data of the previous 10 event clearing.

 

2.9 Power freeze

Instantaneous freezing: The meter freezes after receiving the instantaneous freezing command, and saves the last three instantaneous freezing data.

Timed freeze: It can be set to freeze with hour, day and month as the cycle, and save the last 60 times of time frozen data.

Daily freezing: The daily freezing time can be set. By default, it is frozen at 00:00, and the daily freezing data of the last 62 days can be stored.

Appointment freeze: At the agreed time of switching between the two sets of annual time zone plan / day schedule plan / rate rate plan / stepped electricity price plan, the power and other important data at the agreed time are frozen, and the last two switching records are stored.

Hourly freeze: The start time and interval time of the hourly freeze can be set, and the last 254 times of hourly freeze data can be stored.

Each type of freezing corresponds to a fixed pattern word, and the data to be frozen can be set according to the pattern word, and the frozen content should be consistent with the set pattern word.

For details of each freeze mode word, see "Appendix 2: Meter Mode Characters and Character Words".

 

2.10 Load record

Supports six types of load data. The load recording interval can be set arbitrarily from 1 to 60 minutes. The load interval of each type can be the same or different.

The contents of the six types of data are: (1) A, B, and C phase voltage, current, and frequency; (2) Total and reactive power of each phase of A, B, and C; (3) Total and A, B, and C power factor of each phase; (4) forward active power, reverse active power, combined reactive power 1, combined reactive power 2 total power; (5) four-quadrant total reactive power; (6) current active and reactive power demand.

The meter uses a large-capacity internal card to store load records, which can record 2 megabytes of load record data and can be expanded up to 4 megabytes.

The content of the load record should match the setting of the load mode word.

 

2.11 Security management and user rights

Setting parameters must be set according to the use of the corresponding level password and whether to enter the programming state.

All settings must be pressed after the seal button is pressed, so that the meter can only be operated after the programming is allowed. Programming allowed state is valid for 240 minutes. If you press the -key button again halfway, the meter exits the programming permission state. Programming is allowed to be invalid after power down.

The software sets the lock switch, regardless of whether the seal button is pressed or not, when the wrong password is used to set the meter continuously, the number of operations is ≥3 times (if the number of times is ≤2, then the correct password is successfully set and operated once, the password can be wrong The number of times is reset to zero.), The meter will self-lock and start the self-locking timer, which will automatically unlock after 24 hours and the blocking switch will be invalid.

The energy meter needs to pass the password verification before it can perform programming or other special operations.

 

2.12 Measurement function

This instrument measures the voltage, current, phase angle, apparent power, active power, reactive power, power factor and grid frequency of each phase of A, B and C, and displays the direction of power. Above the starting current, the power can be measured (the display is affected by the number of display digits), and the refresh time is 1 second. The measuring range is: 1 ‰ Pn-Pmax. Here, Pb represents the rated power of active or reactive power, and Pmax represents the maximum power of active or reactive power. The voltage and current are effective values, and the refresh time is 1 second. Voltage measurement range: 70% -130% Un, current measurement range: 1 ‰ In-Imax.

Measurement frequency, frequency measurement resolution is 0.0000001Hz, measurement range: 45 --- 65Hz.

The phase angle of each component is calculated based on the power factor, and the phase angle resolution is 0.01 °.

The minimum resolution of active power measurement is 0.000001kW, and the accuracy is 0.5 grade. It has 4 decimal places for communication reading and 0, 1, 2, 3 or 4 decimal places for display (determined by the number of decimal places for power display); Measurement minimum resolution 0.000001kvar, accuracy level 2

The minimum resolution of the voltage measurement is 0.0001V, and the accuracy is 0.5 grade. There are no decimal places in the communication reading, and there are 4 decimal places in the display.

The minimum resolution of current measurement is 0.0001A, and the accuracy is 1.0 (5% In-Imax). It has 2 decimal places for communication reading and 4 decimal places for display.

 

2.13 LCD backlight function

During normal power supply, the white LCD backlight lights up under the following conditions: key wake up (up or down key), infrared wake up (handwriting device or remote control), card wake up (local fee control CPU card). The backlight mode is used to wake up the backlight, and the energy meter turns off the backlight after two automatic wheel display cycles; the infrared and card insertion mode is used to wake up the backlight, and the energy meter turns off the backlight after 60 seconds.

 

2.14 Sound and light alarm function

This meter is equipped with audible alarm (buzzer intermittently), LCD alarm ("" flashes "), LED alarm (red LED flashes) and auxiliary terminal output alarm.

 

2.16 Power meter reading function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. After 2 seconds, it can be awakened by turning up the key, or by hand-picking device. After awakening, you can read the meter through the LCD display and also through the hand-reading device. When the power fails, the load record cannot be read.

 

2.17 Clock and timing function

The clock has the functions of automatic conversion of calendar, timing and leap year.

Broadcast timing is not limited by passwords and hardware programming switches, but only accepts energy meters whose clock error is less than or equal to 5 minutes. It only accepts calibration once a day, and does not accept broadcast timing within 5 minutes around midnight.

The meter can be calibrated through remote, RS485, infrared and other communication interfaces. Except for the broadcast calibration, the calibration must be performed in the programming state.

 

2.18 Signal output function

Equipped with two red LED indicators for outputting light pulses proportional to metered electrical energy (active / reactive), pulse width: 80ms ± 20ms; with electrically isolated electrical pulse output terminals for output and metered electrical energy (Active / Reactive) Electric pulses proportional to the pulse; the pulse output constant can be set, and the pulse constant factory setting is subject to the instrument panel logo.

Equipped with multi-function signal output terminals (00-second pulse; 01-demand period; 02-time period switching; return to second pulse output after power-on again.). The three kinds of signals can be converted by software setting on the same multi-function signal terminal. After the power meter is powered off, the power is turned on again by default as the daily time error detection signal. The time signal is a second signal, the demand period signal, and the period switching signal are pulse signals of 80ms ± 20ms.

Equipped with an auxiliary terminal alarm control output function, when an event of loss of pressure, loss of current, or disconnection occurs, the energy meter can output a pulse or level switch signal to control an external alarm device.

 

2.19 Basic communication functions

The basic communication of this watch supports far infrared and RS485 communication. Before changing the communication address setting, you need to pass the password and other security verification; when you send the command to write the communication address, you need to long press the key to cooperate.

Infrared communication

Equipped with a far infrared communication interface, the default communication rate is 1200bps, through this communication interface can be parameter settings and data reading in the energy meter, but need to pass a password or other security verification before setting. Infrared communication interface communication distance: ≤5m, communication angle: ≤ ± 30 °.

Equipped with a RS485 communication port, the default communication rate is 2400bps, through this communication interface can be used to set the parameters and read the data in the energy meter, but before setting, you need to pass the password and other security verification.

 

2.20 Self-check display function of electric meter

The electric energy meter has the function of monitoring various operating abnormalities, and is assisted by abnormal codes. Including the abnormal reminder of the energy meter fault, the abnormal reminder of the event type, the relevant prompts of the CPU card, etc., please refer to "Appendix 3 Smart Meter Abnormal Display Code".

For the abnormal indication of the fault of the energy meter, once the abnormality occurs, the automatic cycle display function will be suspended, and the LCD screen will display the fault abnormal code. When only one fault type abnormal occurs, the LCD screen displays the fault type abnormal code. When several fault-type exceptions occur at the same time, the fault-type exception codes are displayed in ascending order, and the display interval is the display time. You can press any key to jump out of the fault-abnormal code display. In the case of key cycle display, if there is no key time for 60 seconds, it will return to the fault type abnormal code and automatically cycle display.

For event-type exception prompts, you need to insert the event-type exception code on the first screen of the loop display once it occurs. When only one event-type exception code occurs, insert the event-type exception code on the first screen of the loop display. When several event-type exception codes occur at the same time, insert all the event-type exception codes in ascending order before the first screen of the loop display, and the display interval is the cyclic display time. You can press the key to display all the abnormal codes that occurred.

For the abnormal prompt of the CPU card, the abnormality that occurs during the processing of the CPU card needs to be prompted after the processing of the CPU card is completed, and the CPU card is withdrawn and returned to the automatic cycle display. (The local fee control meter has this function)

 

2.21 Low-power wake-up display function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. The LCD display can be used to wake up the energy meter with a key or infrared, and there is no need to turn on the backlight at this time. After the energy meter is awakened, if there is no key operation, it will automatically cycle through the cycle display items set in the energy meter and then close the LCD display; if there is a key operation after the energy meter is woken up, press the key display item set in the energy meter to display, press the key The LCD display is automatically turned off 30 seconds after the operation ends. You can only wake up 5 times within 24 hours. After power on, this limit will be invalid.

2 Main functions of the instrument

2.1 Energy measurement

The meter can measure forward and reverse active power, forward and reverse apparent, 1, 2, 3, 4 quadrant reactive power and A, B, C phase active and reactive power, and can set combined active and reactive power character words The positive and negative active energy and the four quadrant reactive energy are selectively added and subtracted to generate combined active power, combined reactive power 1, combined reactive power 2 and electricity.

All kinds of electricity can be measured in time-sharing according to the total and maximum 4 time periods (the electricity in three phases of A, B and C is not measured in time-sharing).

It can store electricity data for 12 settlement cycles.

For forward and reverse active power and forward and reverse apparent, 1, 2, 3, and 4 quadrant reactive power and A, B, and C phase active and reactive power, the effective energy value range is 0 ~ 999999.99, and the unit is kWh or kvarh.

For combined active power, combined reactive power 1, combined reactive power 2, the effective energy range is –799999.99 ~ 799999.99, and the unit is kW? H or kvar? H.

The factory default for electrical energy display is 2 decimal places.

 

2.2 Time slot rates

This watch can be set with two sets of time zone tables and two sets of daily time table programs, and the respective switching time (year, month, day, hour and minute) of the two programs. The meter runs the first set of time zone schedules and the first set of daily time schedules by default. After the meter runs to the switch time of the time zone schedule, it switches to another set of time zone schedules. A set of daily timetable scheme operation; set the switching time of two sets of schemes again, after the meter runs to the time zone table scheme switching time, switch to the first set of time zone table scheme operation, after running the day timetable scheme switch time, press A set of daily schedules are in operation. If the switching time of the two sets of time zone table and the daily time table scheme are set to "FFFFFFFFFF", the two sets of annual time zone table and daily time table cannot be switched.

After the time zone table plan and the daily time table plan are switched, the switching time is cleared.

Maximum 8 rates. Each set of time zone schedules can be set with a maximum of 14 time zones, the start date of each time zone, and the number of day time slots used. Each set of daily schedules can be set up to a maximum of 8 daily schedules, a maximum of 14 daily schedules, and the start time and usage rate of each schedule. The minimum time interval is 15 minutes, and the time interval is greater than the actual demand period value, which can be set across zero.

Public holidays can be set, the date and time table number of each public holiday.

Weekdays can be set, controlled by the characteristics of weekdays, and the table number of the day period used for weekdays can be set.

If the public holiday overlaps with the weekly holiday, the daytime schedule number of the public holiday is adopted.

Hundred-year calendar, time, leap year automatically switch.

If the rate number of a certain period in the daily time table is greater than the number of rates, or the number of rates is 0, the electric energy of this period is counted as rate 1.

 

2.3 Demand measurement

It can measure positive and reverse active power, positive and reverse apparent, 1, 2, 3, 4 quadrant reactive power, combined reactive power 1, 2 maximum demand and occurrence time.

Demand period and slip time can be set within the range of 1 ~ 60min minutes, but should meet: demand period is greater than slip time and an integer multiple of it, demand period can be in 5, 10, 15, 30, 60min Choice; slip time of slip type demand period can be selected in 1, 2, 3, 5min. The demand period shall be an integer multiple of 5 of the slip time, and the multiple shall be 15 or less.

When voltage line power-on, period conversion, clearing, clock adjustment, demand period change, power flow direction conversion, etc., the energy meter starts demand measurement according to the demand period from the current moment, when the first demand After the measurement period is completed, the maximum demand recording starts at the slip interval. Among them, when the time period conversion occurs, the total demand continues to be measured according to slip, and the time-shared demand restarts to be measured according to the demand period.

During an incomplete demand cycle or when modifying the demand cycle, no record of the maximum demand is made.

It can store the maximum demand data for 12 settlement days.

Demand display decimal places default to 4 decimal places.

 

2.4 settlement function

In addition to the current total and time-shared power consumption, maximum demand and its occurrence time of active and reactive power, this table also stores the historical data of the last 1 to 12 settlement cycles (including combined active power, forward and reverse active power, combined Reactive power 1 and combined reactive power 2, four-quadrant reactive power, active power of each component, total reactive power and time-sharing power; forward and reverse active power, combined reactive power 1 and combined reactive power 2, maximum demand of four-quadrant reactive power And its time of occurrence.). When the meter clock reaches the settlement point, the meter performs settlement. When the energy meter is settled, the current electricity amount, maximum demand and its occurrence time are first stored in the previous settlement date, and then the current maximum demand and its occurrence time are cleared, and the cumulative unit for calculating the demand is cleared. Start the calculation again.

If the power meter crosses the settlement point after power-off, the power meter will not make up for settlement after power-on.

Up to three billing days can be set per month, and the first billing day is enabled by default. If the value of the monthly billing day is FFFF, this billing day is not set.

Demand settlement is settled only once on the first settlement day of each month. If other settlement days are activated and the settlement is made at the settlement point, the corresponding demand data for this settlement day will be supplemented with FF.

The voltage qualification rate is settled only on the first settlement day. When other settlement days are enabled for settlement, the voltage qualification rate is not settled.

 

2.5 Event record

Pressure loss: the total number and cumulative time of pressure loss, the time and end of the last pressure loss and the total number and cumulative time of pressure loss of each phase, the time of the last 10 pressure loss, the end time, and the energy during the pressure loss Indication and other data.

Starting condition: The voltage is less than NN% Un (NN is the threshold value of voltage loss starting voltage), and the current is greater than NN.NNNNA (NN.NNNN is the voltage loss starting current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than 85% Un, or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Undervoltage: It can record the total number and accumulated time of undervoltage of each phase, the time of the last 10 undervoltage occurrences, the end time, the energy indication during the undervoltage and other data.

Starting condition: The voltage is lower than NN% Un and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than NN% Un or the maximum voltage is less than the critical voltage or power down.

Judgment delay: 30S.

Overpressure: It can record the data of overpressure of each phase of A, B and C in the last 10 times.

Starting condition: The voltage is greater than NNNN% Un (overvoltage judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is less than the overvoltage judgment threshold, or the voltage is less than the critical voltage, or power down.

Judgment delay: 30S.

Phase failure: It can record the total number of times of phase failure of each phase, the cumulative time, the occurrence time, end time of the last 10 phase failures and the corresponding energy indication data.

Starting condition: The voltage is less than the critical voltage NN% Un, and the current is less than NN.NNNNA (phase start current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than the critical voltage, or the current is greater than the phase-off start current, or the voltage is lower than the critical voltage, or the power is turned off.

Judgment delay: 60S.

Total voltage loss: The total number and total time of total voltage loss can be recorded, the occurrence time, end time and the latest current value of the last 10 total voltage loss.

Starting condition: The voltage of each phase is lower than the critical voltage NN% Un, and the maximum current is greater than 5% In.

End condition: The maximum voltage is greater than the critical voltage, or the maximum current is less than 5% In, or power down.

Judgment delay: 60S.

Voltage reverse phase sequence: It can record the total number of voltage reverse phase sequence, cumulative time, and the energy indication value of the last 10 times and the end time and period.

Starting condition: voltage reverse phase sequence occurs and the minimum voltage is greater than the critical voltage.

End condition: The voltage reverse phase sequence ends and the maximum voltage is less than the critical voltage or power down.

Judgment delay: 60S.

Current loss: It can record the total number of times of current loss of each phase, the accumulated time, the end time of the last 10 current losses, the energy indication during the current loss and other data.

Starting condition: The phase current is less than NN.NNNNA (loss start current), and the remaining phase currents are greater than NN.NNNNA (loss current end), and the maximum voltage is greater than the critical voltage.

End condition: The phase current is greater than NN.NNNNA (loss start current), or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Over-current: It can record the over-current data of the A, B and C phases of the last 10 times.

Starting condition: The current of a certain phase is greater than NNN.N% Ib (overcurrent judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The current of a certain phase is less than the over-current judgment threshold, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Current interruption: It can record the total number and cumulative time of current interruption of each phase, the occurrence time, end time of the last 10 current interruptions, and the energy indication value during the current interruption.

Starting condition: The voltage is greater than NN% Un and the current is less than NN.NNNNA, and the maximum voltage is greater than the critical voltage.

End condition: voltage less than NN% Un or current greater than NN.NNNNA or maximum voltage less than critical voltage.

Judgment delay: 30S.

Power flow reversal: It can record the total number of times and cumulative time of current reversal in each direction, the time of the last 10 times of current reversal, the end time, and the energy indication during the voltage loss.

Starting condition: When the angle between the voltage and the current is greater than 90 degrees and less than 270 degrees, the current reverses. (When judging the reverse flow of a certain phase, the active power of this phase should be greater than NN.NNNN kw)

End condition: phase angle greater than zero degrees and less than 90 degrees or phase angle greater than 270 degrees and less than 360 degrees or voltage less than 10V or current less than starting current or power down

Judgment delay: 60S.

Voltage Qualification Rate: It can record the statistical data of voltage qualification rate of the total, A, B and C phases of this month and the previous 12 months.

Voltage exceeds the upper limit

Starting condition: The phase voltage is greater than the qualified upper limit NNN.NV and less than the assessed upper limit NNN.NV.

End condition: The phase voltage is less than the qualified upper limit NNN.NV, or greater than the upper assessment limit NNN.NV, or power off.

Qualified voltage

Starting condition: The phase voltage is greater than the qualified lower limit NNN.NV and less than the qualified upper limit NNN.NV.

End condition: The phase voltage is less than the qualified lower limit NNN.NV, or greater than the qualified upper limit NNN.NV, or power off.

Low voltage limit

Starting condition: The phase voltage is less than the qualified lower limit NNN.NV, and greater than the evaluated lower limit NNN.NV.

End condition: The phase voltage is greater than the qualified lower limit NNN.NV, or less than the assessed lower limit NNN.NV, or powered off.

Judgment delay of voltage qualification rate: 30 seconds.

Voltage unbalance: can record the last 10 voltage unbalance event records.

In a three-phase power supply system, the voltage unbalance rate is:

Starting condition: voltage imbalance rate is greater than NN% (voltage imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The voltage unbalance rate is less than the upper limit value of the voltage unbalance, or the voltage is lower than the critical voltage, or the power is off.

Judgment delay: 30S.

Current imbalance: can record the last 10 current imbalance event records.

In a three-phase power supply system, the current unbalance rate is:

Starting condition: The current imbalance rate is greater than NN% (current imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The current unbalance rate is less than the upper limit value of current unbalance, or the voltage is lower than the critical voltage, or power off.

Judgment delay: 30S.

Overload: Record the total number of times and total time of each phase overload, and the duration of the last 10 overloads.

Starting condition: The active power of a phase is greater than the upper limit of active power, and the maximum voltage is greater than the critical voltage.

End condition: The active power of a phase is less than the upper limit of active power, or the maximum voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Active power demand overrun: can record the last 10 positive and negative active power demand overrun data.

Starting condition: Active power demand is greater than NN.NNNNkW (active power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Active demand is less than the upper limit of active power, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Reactive Power Demand Exceeding Limit: The data of the last 10 times 1, 2, 3, and 4 quadrant reactive power demand exceeding limits can be recorded.

Starting condition: reactive power demand is greater than NN.NNNNkW (reactive power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Reactive power demand is less than the upper limit of reactive power, or the voltage is less than the critical voltage, or power off.

Judgment delay: 30S.

Total power factor exceeds the lower limit: the total number of total power factor exceeding the lower limit and the total accumulated time can be recorded, the last 10 total power factor exceeding the lower limit occurs at the time, the end time, and the total power factor exceeding the lower limit of the energy indication data.

Starting condition: The total power factor is less than N.NNN and the maximum voltage is greater than the critical voltage.

End condition: The total power factor is greater than N.NNN and the maximum voltage is less than the critical voltage.

Judgment delay: 30S.

Power-down: The total number of power-downs can be recorded, and the end time of the last 10 power-downs.

Time slot and holiday programming: record daily time table, annual time zone table, weekly holiday, total number of holiday programming and the latest 10 times of programming time, operator code, pre-programming data.

Active and reactive power combination programming: record the combined active power, combined reactive power 1, combined reactive power 2 total programming times and the last 10 times of programming time, operator code, data before programming.

Settlement day programming: record the total number of programming on the settlement day and the last 10 programming times, operator code, pre-programming data.

Programming record: It can record the total number of programming, the time of the last 10 programming, the operator code, and the data identification of the programming item. Press the programming switch to enter the programming state and program the meter, and press the programming switch again to exit the programming state. This process is recorded as a programming record, and the programming record records the last ten data identifiers of programming.

Time calibration: It can record the total number of time calibrations, the time of the last 10 time calibrations, and the operator code. Broadcast time is not recorded in the school time record.

Open cover: record the total number of open covers, the occurrence and end time of the last 10 open cover covers.

Opening end cover: It can record the total number of openings of the terminal end cover, the occurrence and end time of the last 10 opening button cover events.

Meter reset: permanently record the total number of meter resets, the time of the last 10 meter resets, the operator code, and energy data.

Demand reset: record the total number of times demand cleared, the last 10 times the demand cleared, the operator code and other current demand indication data.

Event clearing: It can record the total number of event clearing, the time of the last 10 event clearing, operator code and event clearing data identification code.

Closing and closing events: It can record the last 10 closing and closing events, and record the occurrence, time and important electrical energy of the closing and closing events.

 

2.6 Meter reset

The meter clears and clears the electric energy, maximum demand and occurrence time, freezing amount, non-permanently recorded part of the event record, load record and other data in the energy meter.

The meter reset must be used in conjunction with the encryption machine and the corresponding authorization password is required. When the command is executed, the energy meter should ensure that the record of the meter reset event is not cleared and automatically save the corresponding data of the event.

Able to permanently record the total number of meter resets and the previous 10 meter reset data.

 

2.7 Demand reset

Clear all the maximum demand and occurrence time data recorded this month in the table.

Demand reset must be used with the encryption machine and the corresponding authorization password is required.

It can record the total number of demand clearing events and the data of the previous 10 demand clearing.

 

2.8 Event reset

Clear all the data stored in the energy meter (except for permanent records) or certain types of event record data.

The event reset must be used in conjunction with the encryption machine and requires the corresponding authorization password.

It can record the total number of event clearing events and the data of the previous 10 event clearing.

 

2.9 Power freeze

Instantaneous freezing: The meter freezes after receiving the instantaneous freezing command, and saves the last three instantaneous freezing data.

Timed freeze: It can be set to freeze with hour, day and month as the cycle, and save the last 60 times of time frozen data.

Daily freezing: The daily freezing time can be set. By default, it is frozen at 00:00, and the daily freezing data of the last 62 days can be stored.

Appointment freeze: At the agreed time of switching between the two sets of annual time zone plan / day schedule plan / rate rate plan / stepped electricity price plan, the power and other important data at the agreed time are frozen, and the last two switching records are stored.

Hourly freeze: The start time and interval time of the hourly freeze can be set, and the last 254 times of hourly freeze data can be stored.

Each type of freezing corresponds to a fixed pattern word, and the data to be frozen can be set according to the pattern word, and the frozen content should be consistent with the set pattern word.

For details of each freeze mode word, see "Appendix 2: Meter Mode Characters and Character Words".

 

2.10 Load record

Supports six types of load data. The load recording interval can be set arbitrarily from 1 to 60 minutes. The load interval of each type can be the same or different.

The contents of the six types of data are: (1) A, B, and C phase voltage, current, and frequency; (2) Total and reactive power of each phase of A, B, and C; (3) Total and A, B, and C power factor of each phase; (4) forward active power, reverse active power, combined reactive power 1, combined reactive power 2 total power; (5) four-quadrant total reactive power; (6) current active and reactive power demand.

The meter uses a large-capacity internal card to store load records, which can record 2 megabytes of load record data and can be expanded up to 4 megabytes.

The content of the load record should match the setting of the load mode word.

 

2.11 Security management and user rights

Setting parameters must be set according to the use of the corresponding level password and whether to enter the programming state.

All settings must be pressed after the seal button is pressed, so that the meter can only be operated after the programming is allowed. Programming allowed state is valid for 240 minutes. If you press the -key button again halfway, the meter exits the programming permission state. Programming is allowed to be invalid after power down.

The software sets the lock switch, regardless of whether the seal button is pressed or not, when the wrong password is used to set the meter continuously, the number of operations is ≥3 times (if the number of times is ≤2, then the correct password is successfully set and operated once, the password can be wrong The number of times is reset to zero.), The meter will self-lock and start the self-locking timer, which will automatically unlock after 24 hours and the blocking switch will be invalid.

The energy meter needs to pass the password verification before it can perform programming or other special operations.

 

2.12 Measurement function

This instrument measures the voltage, current, phase angle, apparent power, active power, reactive power, power factor and grid frequency of each phase of A, B and C, and displays the direction of power. Above the starting current, the power can be measured (the display is affected by the number of display digits), and the refresh time is 1 second. The measuring range is: 1 ‰ Pn-Pmax. Here, Pb represents the rated power of active or reactive power, and Pmax represents the maximum power of active or reactive power. The voltage and current are effective values, and the refresh time is 1 second. Voltage measurement range: 70% -130% Un, current measurement range: 1 ‰ In-Imax.

Measurement frequency, frequency measurement resolution is 0.0000001Hz, measurement range: 45 --- 65Hz.

The phase angle of each component is calculated based on the power factor, and the phase angle resolution is 0.01 °.

The minimum resolution of active power measurement is 0.000001kW, and the accuracy is 0.5 grade. It has 4 decimal places for communication reading and 0, 1, 2, 3 or 4 decimal places for display (determined by the number of decimal places for power display); Measurement minimum resolution 0.000001kvar, accuracy level 2

The minimum resolution of the voltage measurement is 0.0001V, and the accuracy is 0.5 grade. There are no decimal places in the communication reading, and there are 4 decimal places in the display.

The minimum resolution of current measurement is 0.0001A, and the accuracy is 1.0 (5% In-Imax). It has 2 decimal places for communication reading and 4 decimal places for display.

 

2.13 LCD backlight function

During normal power supply, the white LCD backlight lights up under the following conditions: key wake up (up or down key), infrared wake up (handwriting device or remote control), card wake up (local fee control CPU card). The backlight mode is used to wake up the backlight, and the energy meter turns off the backlight after two automatic wheel display cycles; the infrared and card insertion mode is used to wake up the backlight, and the energy meter turns off the backlight after 60 seconds.

 

2.14 Sound and light alarm function

This meter is equipped with audible alarm (buzzer intermittently), LCD alarm ("" flashes "), LED alarm (red LED flashes) and auxiliary terminal output alarm.

 

2.16 Power meter reading function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. After 2 seconds, it can be awakened by turning up the key, or by hand-picking device. After awakening, you can read the meter through the LCD display and also through the hand-reading device. When the power fails, the load record cannot be read.

 

2.17 Clock and timing function

The clock has the functions of automatic conversion of calendar, timing and leap year.

Broadcast timing is not limited by passwords and hardware programming switches, but only accepts energy meters whose clock error is less than or equal to 5 minutes. It only accepts calibration once a day, and does not accept broadcast timing within 5 minutes around midnight.

The meter can be calibrated through remote, RS485, infrared and other communication interfaces. Except for the broadcast calibration, the calibration must be performed in the programming state.

 

2.18 Signal output function

Equipped with two red LED indicators for outputting light pulses proportional to metered electrical energy (active / reactive), pulse width: 80ms ± 20ms; with electrically isolated electrical pulse output terminals for output and metered electrical energy (Active / Reactive) Electric pulses proportional to the pulse; the pulse output constant can be set, and the pulse constant factory setting is subject to the instrument panel logo.

Equipped with multi-function signal output terminals (00-second pulse; 01-demand period; 02-time period switching; return to second pulse output after power-on again.). The three kinds of signals can be converted by software setting on the same multi-function signal terminal. After the power meter is powered off, the power is turned on again by default as the daily time error detection signal. The time signal is a second signal, the demand period signal, and the period switching signal are pulse signals of 80ms ± 20ms.

Equipped with an auxiliary terminal alarm control output function, when an event of loss of pressure, loss of current, or disconnection occurs, the energy meter can output a pulse or level switch signal to control an external alarm device.

 

2.19 Basic communication functions

The basic communication of this watch supports far infrared and RS485 communication. Before changing the communication address setting, you need to pass the password and other security verification; when you send the command to write the communication address, you need to long press the key to cooperate.

Infrared communication

Equipped with a far infrared communication interface, the default communication rate is 1200bps, through this communication interface can be parameter settings and data reading in the energy meter, but need to pass a password or other security verification before setting. Infrared communication interface communication distance: ≤5m, communication angle: ≤ ± 30 °.

Equipped with a RS485 communication port, the default communication rate is 2400bps, through this communication interface can be used to set the parameters and read the data in the energy meter, but before setting, you need to pass the password and other security verification.

 

2.20 Self-check display function of electric meter

The electric energy meter has the function of monitoring various operating abnormalities, and is assisted by abnormal codes. Including the abnormal reminder of the energy meter fault, the abnormal reminder of the event type, the relevant prompts of the CPU card, etc., please refer to "Appendix 3 Smart Meter Abnormal Display Code".

For the abnormal indication of the fault of the energy meter, once the abnormality occurs, the automatic cycle display function will be suspended, and the LCD screen will display the fault abnormal code. When only one fault type abnormal occurs, the LCD screen displays the fault type abnormal code. When several fault-type exceptions occur at the same time, the fault-type exception codes are displayed in ascending order, and the display interval is the display time. You can press any key to jump out of the fault-abnormal code display. In the case of key cycle display, if there is no key time for 60 seconds, it will return to the fault type abnormal code and automatically cycle display.

For event-type exception prompts, you need to insert the event-type exception code on the first screen of the loop display once it occurs. When only one event-type exception code occurs, insert the event-type exception code on the first screen of the loop display. When several event-type exception codes occur at the same time, insert all the event-type exception codes in ascending order before the first screen of the loop display, and the display interval is the cyclic display time. You can press the key to display all the abnormal codes that occurred.

For the abnormal prompt of the CPU card, the abnormality that occurs during the processing of the CPU card needs to be prompted after the processing of the CPU card is completed, and the CPU card is withdrawn and returned to the automatic cycle display. (The local fee control meter has this function)

 

2.21 Low-power wake-up display function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. The LCD display can be used to wake up the energy meter with a key or infrared, and there is no need to turn on the backlight at this time. After the energy meter is awakened, if there is no key operation, it will automatically cycle through the cycle display items set in the energy meter and then close the LCD display; if there is a key operation after the energy meter is woken up, press the key display item set in the energy meter to display, press the key The LCD display is automatically turned off 30 seconds after the operation ends. You can only wake up 5 times within 24 hours. After power on, this limit will be invalid.

Product description
Parameters
概要

2 Main functions of the instrument

2.1 Energy measurement

The meter can measure forward and reverse active power, forward and reverse apparent, 1, 2, 3, 4 quadrant reactive power and A, B, C phase active and reactive power, and can set combined active and reactive power character words The positive and negative active energy and the four quadrant reactive energy are selectively added and subtracted to generate combined active power, combined reactive power 1, combined reactive power 2 and electricity.

All kinds of electricity can be measured in time-sharing according to the total and maximum 4 time periods (the electricity in three phases of A, B and C is not measured in time-sharing).

It can store electricity data for 12 settlement cycles.

For forward and reverse active power and forward and reverse apparent, 1, 2, 3, and 4 quadrant reactive power and A, B, and C phase active and reactive power, the effective energy value range is 0 ~ 999999.99, and the unit is kWh or kvarh.

For combined active power, combined reactive power 1, combined reactive power 2, the effective energy range is –799999.99 ~ 799999.99, and the unit is kW? H or kvar? H.

The factory default for electrical energy display is 2 decimal places.

2.2 Time slot rates

This watch can be set with two sets of time zone tables and two sets of daily time table programs, and the respective switching time (year, month, day, hour and minute) of the two programs. The meter runs the first set of time zone schedules and the first set of daily time schedules by default. After the meter runs to the switch time of the time zone schedule, it switches to another set of time zone schedules. A set of daily timetable scheme operation; set the switching time of two sets of schemes again, after the meter runs to the time zone table scheme switching time, switch to the first set of time zone table scheme operation, after running the day timetable scheme switch time, press A set of daily schedules are in operation. If the switching time of the two sets of time zone table and the daily time table scheme are set to "FFFFFFFFFF", the two sets of annual time zone table and daily time table cannot be switched.

After the time zone table plan and the daily time table plan are switched, the switching time is cleared.

Maximum 8 rates. Each set of time zone schedules can be set with a maximum of 14 time zones, the start date of each time zone, and the number of day time slots used. Each set of daily schedules can be set up to a maximum of 8 daily schedules, a maximum of 14 daily schedules, and the start time and usage rate of each schedule. The minimum time interval is 15 minutes, and the time interval is greater than the actual demand period value, which can be set across zero.

Public holidays can be set, the date and time table number of each public holiday.

Weekdays can be set, controlled by the characteristics of weekdays, and the table number of the day period used for weekdays can be set.

If the public holiday overlaps with the weekly holiday, the daytime schedule number of the public holiday is adopted.

Hundred-year calendar, time, leap year automatically switch.

If the rate number of a certain period in the daily time table is greater than the number of rates, or the number of rates is 0, the electric energy of this period is counted as rate 1.

2.3 Demand measurement

It can measure positive and reverse active power, positive and reverse apparent, 1, 2, 3, 4 quadrant reactive power, combined reactive power 1, 2 maximum demand and occurrence time.

Demand period and slip time can be set within the range of 1 ~ 60min minutes, but should meet: demand period is greater than slip time and an integer multiple of it, demand period can be in 5, 10, 15, 30, 60min Choice; slip time of slip type demand period can be selected in 1, 2, 3, 5min. The demand period shall be an integer multiple of 5 of the slip time, and the multiple shall be 15 or less.

When voltage line power-on, period conversion, clearing, clock adjustment, demand period change, power flow direction conversion, etc., the energy meter starts demand measurement according to the demand period from the current moment, when the first demand After the measurement period is completed, the maximum demand recording starts at the slip interval. Among them, when the time period conversion occurs, the total demand continues to be measured according to slip, and the time-shared demand restarts to be measured according to the demand period.

During an incomplete demand cycle or when modifying the demand cycle, no record of the maximum demand is made.

It can store the maximum demand data for 12 settlement days.

Demand display decimal places default to 4 decimal places.

2.4 settlement function

In addition to the current total and time-shared power consumption, maximum demand and its occurrence time of active and reactive power, this table also stores the historical data of the last 1 to 12 settlement cycles (including combined active power, forward and reverse active power, combined Reactive power 1 and combined reactive power 2, four-quadrant reactive power, active power of each component, total reactive power and time-sharing power; forward and reverse active power, combined reactive power 1 and combined reactive power 2, maximum demand of four-quadrant reactive power And its time of occurrence.). When the meter clock reaches the settlement point, the meter performs settlement. When the energy meter is settled, the current electricity amount, maximum demand and its occurrence time are first stored in the previous settlement date, and then the current maximum demand and its occurrence time are cleared, and the cumulative unit for calculating the demand is cleared. Start the calculation again.

If the power meter crosses the settlement point after power-off, the power meter will not make up for settlement after power-on.

Up to three billing days can be set per month, and the first billing day is enabled by default. If the value of the monthly billing day is FFFF, this billing day is not set.

Demand settlement is settled only once on the first settlement day of each month. If other settlement days are activated and the settlement is made at the settlement point, the corresponding demand data for this settlement day will be supplemented with FF.

The voltage qualification rate is settled only on the first settlement day. When other settlement days are enabled for settlement, the voltage qualification rate is not settled.

2.5 Event record

Pressure loss: the total number and cumulative time of pressure loss, the time and end of the last pressure loss and the total number and cumulative time of pressure loss of each phase, the time of the last 10 pressure loss, the end time, and the energy during the pressure loss Indication and other data.

Starting condition: The voltage is less than NN% Un (NN is the threshold value of voltage loss starting voltage), and the current is greater than NN.NNNNA (NN.NNNN is the voltage loss starting current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than 85% Un, or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Undervoltage: It can record the total number and accumulated time of undervoltage of each phase, the time of the last 10 undervoltage occurrences, the end time, the energy indication during the undervoltage and other data.

Starting condition: The voltage is lower than NN% Un and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than NN% Un or the maximum voltage is less than the critical voltage or power down.

Judgment delay: 30S.

Overpressure: It can record the data of overpressure of each phase of A, B and C in the last 10 times.

Starting condition: The voltage is greater than NNNN% Un (overvoltage judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is less than the overvoltage judgment threshold, or the voltage is less than the critical voltage, or power down.

Judgment delay: 30S.

Phase failure: It can record the total number of times of phase failure of each phase, the cumulative time, the occurrence time, end time of the last 10 phase failures and the corresponding energy indication data.

Starting condition: The voltage is less than the critical voltage NN% Un, and the current is less than NN.NNNNA (phase start current), and the maximum voltage is greater than the critical voltage.

End condition: The voltage is greater than the critical voltage, or the current is greater than the phase-off start current, or the voltage is lower than the critical voltage, or the power is turned off.

Judgment delay: 60S.

Total voltage loss: The total number and total time of total voltage loss can be recorded, the occurrence time, end time and the latest current value of the last 10 total voltage loss.

Starting condition: The voltage of each phase is lower than the critical voltage NN% Un, and the maximum current is greater than 5% In.

End condition: The maximum voltage is greater than the critical voltage, or the maximum current is less than 5% In, or power down.

Judgment delay: 60S.

Voltage reverse phase sequence: It can record the total number of voltage reverse phase sequence, cumulative time, and the energy indication value of the last 10 times and the end time and period.

Starting condition: voltage reverse phase sequence occurs and the minimum voltage is greater than the critical voltage.

End condition: The voltage reverse phase sequence ends and the maximum voltage is less than the critical voltage or power down.

Judgment delay: 60S.

Current loss: It can record the total number of times of current loss of each phase, the accumulated time, the end time of the last 10 current losses, the energy indication during the current loss and other data.

Starting condition: The phase current is less than NN.NNNNA (loss start current), and the remaining phase currents are greater than NN.NNNNA (loss current end), and the maximum voltage is greater than the critical voltage.

End condition: The phase current is greater than NN.NNNNA (loss start current), or the voltage is lower than the critical voltage, or power down.

Judgment delay: 60S.

Over-current: It can record the over-current data of the A, B and C phases of the last 10 times.

Starting condition: The current of a certain phase is greater than NNN.N% Ib (overcurrent judgment threshold), and the maximum voltage is greater than the critical voltage.

End condition: The current of a certain phase is less than the over-current judgment threshold, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Current interruption: It can record the total number and cumulative time of current interruption of each phase, the occurrence time, end time of the last 10 current interruptions, and the energy indication value during the current interruption.

Starting condition: The voltage is greater than NN% Un and the current is less than NN.NNNNA, and the maximum voltage is greater than the critical voltage.

End condition: voltage less than NN% Un or current greater than NN.NNNNA or maximum voltage less than critical voltage.

Judgment delay: 30S.

Power flow reversal: It can record the total number of times and cumulative time of current reversal in each direction, the time of the last 10 times of current reversal, the end time, and the energy indication during the voltage loss.

Starting condition: When the angle between the voltage and the current is greater than 90 degrees and less than 270 degrees, the current reverses. (When judging the reverse flow of a certain phase, the active power of this phase should be greater than NN.NNNN kw)

End condition: phase angle greater than zero degrees and less than 90 degrees or phase angle greater than 270 degrees and less than 360 degrees or voltage less than 10V or current less than starting current or power down

Judgment delay: 60S.

Voltage Qualification Rate: It can record the statistical data of voltage qualification rate of the total, A, B and C phases of this month and the previous 12 months.

Voltage exceeds the upper limit

Starting condition: The phase voltage is greater than the qualified upper limit NNN.NV and less than the assessed upper limit NNN.NV.

End condition: The phase voltage is less than the qualified upper limit NNN.NV, or greater than the upper assessment limit NNN.NV, or power off.

Qualified voltage

Starting condition: The phase voltage is greater than the qualified lower limit NNN.NV and less than the qualified upper limit NNN.NV.

End condition: The phase voltage is less than the qualified lower limit NNN.NV, or greater than the qualified upper limit NNN.NV, or power off.

Low voltage limit

Starting condition: The phase voltage is less than the qualified lower limit NNN.NV, and greater than the evaluated lower limit NNN.NV.

End condition: The phase voltage is greater than the qualified lower limit NNN.NV, or less than the assessed lower limit NNN.NV, or powered off.

Judgment delay of voltage qualification rate: 30 seconds.

Voltage unbalance: can record the last 10 voltage unbalance event records.

In a three-phase power supply system, the voltage unbalance rate is:

Starting condition: voltage imbalance rate is greater than NN% (voltage imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The voltage unbalance rate is less than the upper limit value of the voltage unbalance, or the voltage is lower than the critical voltage, or the power is off.

Judgment delay: 30S.

Current imbalance: can record the last 10 current imbalance event records.

In a three-phase power supply system, the current unbalance rate is:

Starting condition: The current imbalance rate is greater than NN% (current imbalance upper limit), and the maximum voltage is greater than the critical voltage.

End condition: The current unbalance rate is less than the upper limit value of current unbalance, or the voltage is lower than the critical voltage, or power off.

Judgment delay: 30S.

Overload: Record the total number of times and total time of each phase overload, and the duration of the last 10 overloads.

Starting condition: The active power of a phase is greater than the upper limit of active power, and the maximum voltage is greater than the critical voltage.

End condition: The active power of a phase is less than the upper limit of active power, or the maximum voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Active power demand overrun: can record the last 10 positive and negative active power demand overrun data.

Starting condition: Active power demand is greater than NN.NNNNkW (active power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Active demand is less than the upper limit of active power, or the voltage is less than the critical voltage, or power-off.

Judgment delay: 30S.

Reactive Power Demand Exceeding Limit: The data of the last 10 times 1, 2, 3, and 4 quadrant reactive power demand exceeding limits can be recorded.

Starting condition: reactive power demand is greater than NN.NNNNkW (reactive power upper limit), and the maximum voltage is greater than the critical voltage.

End condition: Reactive power demand is less than the upper limit of reactive power, or the voltage is less than the critical voltage, or power off.

Judgment delay: 30S.

Total power factor exceeds the lower limit: the total number of total power factor exceeding the lower limit and the total accumulated time can be recorded, the last 10 total power factor exceeding the lower limit occurs at the time, the end time, and the total power factor exceeding the lower limit of the energy indication data.

Starting condition: The total power factor is less than N.NNN and the maximum voltage is greater than the critical voltage.

End condition: The total power factor is greater than N.NNN and the maximum voltage is less than the critical voltage.

Judgment delay: 30S.

Power-down: The total number of power-downs can be recorded, and the end time of the last 10 power-downs.

Time slot and holiday programming: record daily time table, annual time zone table, weekly holiday, total number of holiday programming and the latest 10 times of programming time, operator code, pre-programming data.

Active and reactive power combination programming: record the combined active power, combined reactive power 1, combined reactive power 2 total programming times and the last 10 times of programming time, operator code, data before programming.

Settlement day programming: record the total number of programming on the settlement day and the last 10 programming times, operator code, pre-programming data.

Programming record: It can record the total number of programming, the time of the last 10 programming, the operator code, and the data identification of the programming item. Press the programming switch to enter the programming state and program the meter, and press the programming switch again to exit the programming state. This process is recorded as a programming record, and the programming record records the last ten data identifiers of programming.

Time calibration: It can record the total number of time calibrations, the time of the last 10 time calibrations, and the operator code. Broadcast time is not recorded in the school time record.

Open cover: record the total number of open covers, the occurrence and end time of the last 10 open cover covers.

Opening end cover: It can record the total number of openings of the terminal end cover, the occurrence and end time of the last 10 opening button cover events.

Meter reset: permanently record the total number of meter resets, the time of the last 10 meter resets, the operator code, and energy data.

Demand reset: record the total number of times demand cleared, the last 10 times the demand cleared, the operator code and other current demand indication data.

Event clearing: It can record the total number of event clearing, the time of the last 10 event clearing, operator code and event clearing data identification code.

Closing and closing events: It can record the last 10 closing and closing events, and record the occurrence, time and important electrical energy of the closing and closing events.

2.6 Meter reset

The meter clears and clears the electric energy, maximum demand and occurrence time, freezing amount, non-permanently recorded part of the event record, load record and other data in the energy meter.

The meter reset must be used in conjunction with the encryption machine and the corresponding authorization password is required. When the command is executed, the energy meter should ensure that the record of the meter reset event is not cleared and automatically save the corresponding data of the event.

Able to permanently record the total number of meter resets and the previous 10 meter reset data.

2.7 Demand reset

Clear all the maximum demand and occurrence time data recorded this month in the table.

Demand reset must be used with the encryption machine and the corresponding authorization password is required.

It can record the total number of demand clearing events and the data of the previous 10 demand clearing.

2.8 Event reset

Clear all the data stored in the energy meter (except for permanent records) or certain types of event record data.

The event reset must be used in conjunction with the encryption machine and requires the corresponding authorization password.

It can record the total number of event clearing events and the data of the previous 10 event clearing.

2.9 Power freeze

Instantaneous freezing: The meter freezes after receiving the instantaneous freezing command, and saves the last three instantaneous freezing data.

Timed freeze: It can be set to freeze with hour, day and month as the cycle, and save the last 60 times of time frozen data.

Daily freezing: The daily freezing time can be set. By default, it is frozen at 00:00, and the daily freezing data of the last 62 days can be stored.

Appointment freeze: At the agreed time of switching between the two sets of annual time zone plan / day schedule plan / rate rate plan / stepped electricity price plan, the power and other important data at the agreed time are frozen, and the last two switching records are stored.

Hourly freeze: The start time and interval time of the hourly freeze can be set, and the last 254 times of hourly freeze data can be stored.

Each type of freezing corresponds to a fixed pattern word, and the data to be frozen can be set according to the pattern word, and the frozen content should be consistent with the set pattern word.

For details of each freeze mode word, see "Appendix 2: Meter Mode Characters and Character Words".

2.10 Load record

Supports six types of load data. The load recording interval can be set arbitrarily from 1 to 60 minutes. The load interval of each type can be the same or different.

The contents of the six types of data are: (1) A, B, and C phase voltage, current, and frequency; (2) Total and reactive power of each phase of A, B, and C; (3) Total and A, B, and C power factor of each phase; (4) forward active power, reverse active power, combined reactive power 1, combined reactive power 2 total power; (5) four-quadrant total reactive power; (6) current active and reactive power demand.

The meter uses a large-capacity internal card to store load records, which can record 2 megabytes of load record data and can be expanded up to 4 megabytes.

The content of the load record should match the setting of the load mode word.

2.11 Security management and user rights

Setting parameters must be set according to the use of the corresponding level password and whether to enter the programming state.

All settings must be pressed after the seal button is pressed, so that the meter can only be operated after the programming is allowed. Programming allowed state is valid for 240 minutes. If you press the -key button again halfway, the meter exits the programming permission state. Programming is allowed to be invalid after power down.

The software sets the lock switch, regardless of whether the seal button is pressed or not, when the wrong password is used to set the meter continuously, the number of operations is ≥3 times (if the number of times is ≤2, then the correct password is successfully set and operated once, the password can be wrong The number of times is reset to zero.), The meter will self-lock and start the self-locking timer, which will automatically unlock after 24 hours and the blocking switch will be invalid.

The energy meter needs to pass the password verification before it can perform programming or other special operations.

2.12 Measurement function

This instrument measures the voltage, current, phase angle, apparent power, active power, reactive power, power factor and grid frequency of each phase of A, B and C, and displays the direction of power. Above the starting current, the power can be measured (the display is affected by the number of display digits), and the refresh time is 1 second. The measuring range is: 1 ‰ Pn-Pmax. Here, Pb represents the rated power of active or reactive power, and Pmax represents the maximum power of active or reactive power. The voltage and current are effective values, and the refresh time is 1 second. Voltage measurement range: 70% -130% Un, current measurement range: 1 ‰ In-Imax.

Measurement frequency, frequency measurement resolution is 0.0000001Hz, measurement range: 45 --- 65Hz.

The phase angle of each component is calculated based on the power factor, and the phase angle resolution is 0.01 °.

The minimum resolution of active power measurement is 0.000001kW, and the accuracy is 0.5 grade. It has 4 decimal places for communication reading and 0, 1, 2, 3 or 4 decimal places for display (determined by the number of decimal places for power display); Measurement minimum resolution 0.000001kvar, accuracy level 2

The minimum resolution of the voltage measurement is 0.0001V, and the accuracy is 0.5 grade. There are no decimal places in the communication reading, and there are 4 decimal places in the display.

The minimum resolution of current measurement is 0.0001A, and the accuracy is 1.0 (5% In-Imax). It has 2 decimal places for communication reading and 4 decimal places for display.

2.13 LCD backlight function

During normal power supply, the white LCD backlight lights up under the following conditions: key wake up (up or down key), infrared wake up (handwriting device or remote control), card wake up (local fee control CPU card). The backlight mode is used to wake up the backlight, and the energy meter turns off the backlight after two automatic wheel display cycles; the infrared and card insertion mode is used to wake up the backlight, and the energy meter turns off the backlight after 60 seconds.

2.14 Sound and light alarm function

This meter is equipped with audible alarm (buzzer intermittently), LCD alarm ("" flashes "), LED alarm (red LED flashes) and auxiliary terminal output alarm.

2.16 Power meter reading function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. After 2 seconds, it can be awakened by turning up the key, or by hand-picking device. After awakening, you can read the meter through the LCD display and also through the hand-reading device. When the power fails, the load record cannot be read.

2.17 Clock and timing function

The clock has the functions of automatic conversion of calendar, timing and leap year.

Broadcast timing is not limited by passwords and hardware programming switches, but only accepts energy meters whose clock error is less than or equal to 5 minutes. It only accepts calibration once a day, and does not accept broadcast timing within 5 minutes around midnight.

The meter can be calibrated through remote, RS485, infrared and other communication interfaces. Except for the broadcast calibration, the calibration must be performed in the programming state.

2.18 Signal output function

Equipped with two red LED indicators for outputting light pulses proportional to metered electrical energy (active / reactive), pulse width: 80ms ± 20ms; with electrically isolated electrical pulse output terminals for output and metered electrical energy (Active / Reactive) Electric pulses proportional to the pulse; the pulse output constant can be set, and the pulse constant factory setting is subject to the instrument panel logo.

Equipped with multi-function signal output terminals (00-second pulse; 01-demand period; 02-time period switching; return to second pulse output after power-on again.). The three kinds of signals can be converted by software setting on the same multi-function signal terminal. After the power meter is powered off, the power is turned on again by default as the daily time error detection signal. The time signal is a second signal, the demand period signal, and the period switching signal are pulse signals of 80ms ± 20ms.

Equipped with an auxiliary terminal alarm control output function, when an event of loss of pressure, loss of current, or disconnection occurs, the energy meter can output a pulse or level switch signal to control an external alarm device.

2.19 Basic communication functions

The basic communication of this watch supports far infrared and RS485 communication. Before changing the communication address setting, you need to pass the password and other security verification; when you send the command to write the communication address, you need to long press the key to cooperate.

Infrared communication

Equipped with a far infrared communication interface, the default communication rate is 1200bps, through this communication interface can be parameter settings and data reading in the energy meter, but need to pass a password or other security verification before setting. Infrared communication interface communication distance: ≤5m, communication angle: ≤ ± 30 °.

Equipped with a RS485 communication port, the default communication rate is 2400bps, through this communication interface can be used to set the parameters and read the data in the energy meter, but before setting, you need to pass the password and other security verification.

2.20 Self-check display function of electric meter

The electric energy meter has the function of monitoring various operating abnormalities, and is assisted by abnormal codes. Including the abnormal reminder of the energy meter fault, the abnormal reminder of the event type, the relevant prompts of the CPU card, etc., please refer to "Appendix 3 Smart Meter Abnormal Display Code".

For the abnormal indication of the fault of the energy meter, once the abnormality occurs, the automatic cycle display function will be suspended, and the LCD screen will display the fault abnormal code. When only one fault type abnormal occurs, the LCD screen displays the fault type abnormal code. When several fault-type exceptions occur at the same time, the fault-type exception codes are displayed in ascending order, and the display interval is the display time. You can press any key to jump out of the fault-abnormal code display. In the case of key cycle display, if there is no key time for 60 seconds, it will return to the fault type abnormal code and automatically cycle display.

For event-type exception prompts, you need to insert the event-type exception code on the first screen of the loop display once it occurs. When only one event-type exception code occurs, insert the event-type exception code on the first screen of the loop display. When several event-type exception codes occur at the same time, insert all the event-type exception codes in ascending order before the first screen of the loop display, and the display interval is the cyclic display time. You can press the key to display all the abnormal codes that occurred.

For the abnormal prompt of the CPU card, the abnormality that occurs during the processing of the CPU card needs to be prompted after the processing of the CPU card is completed, and the CPU card is withdrawn and returned to the automatic cycle display. (The local fee control meter has this function)

2.21 Low-power wake-up display function

The meter with a low-power battery enters a low-power sleep state after the voltage loop is de-energized. The LCD display can be used to wake up the energy meter with a key or infrared, and there is no need to turn on the backlight at this time. After the energy meter is awakened, if there is no key operation, it will automatically cycle through the cycle display items set in the energy meter and then close the LCD display; if there is a key operation after the energy meter is woken up, press the key display item set in the energy meter to display, press the key The LCD display is automatically turned off 30 seconds after the operation ends. You can only wake up 5 times within 24 hours. After power on, this limit will be invalid.

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