Model selection
1. Category code: D--watt hour meter
2. Group code indicates phase line: D--single phase; S--three-phase three-wire; T--three-phase four-wire. Indicates the classification of the purpose: D--multi-function; S--electronic; X--reactive power; Y--prepayment; F--multiple rate.
3. The design serial number is represented by Arabic numerals, and the design serial number of each manufacturer is different. For example, the serial number of the watt-hour meter designed and produced by Zhejiang Huaxia Instrument Co., Ltd. is 633, and the serial number of Chint Instrument Company is 666.
To sum up the above points: DDSY--indicating single-phase electronic prepaid watt-hour meter, DTSY--indicating three-phase four-electronic prepaid watt-hour meter, DTSF--indicating three-phase four-wire electronic multi-rate watt-hour meter , DSSF--indicating three-phase three-wire electronic multi-rate watt-hour meter, DSSD--indicating three-phase three-wire multi-function watt-hour meter, DTSD--indicating three-phase four-wire multi-function watt-hour meter, DTS--indicating three-phase Four-wire electronic active energy meter, DSS--indicates three-phase three-wire electronic active energy meter, DS--indicates three-phase three-wire mechanical active energy meter, DT--indicates three-phase four-wire mechanical active energy meter Meter, DX--Mechanical reactive power meter, DTSX--Three-phase four-wire electronic reactive power meter, DSSX--Three-phase three-wire electronic reactive power meter, DTS(X)- -Indicates three-phase four-wire electronic active and reactive power meter, DSS(X)-- indicates three-phase three-wire electronic active and reactive power meter, DSM-- indicates three-phase three-wire mechanical pulse watt-hour meter, DTM--indicates three-phase four-wire mechanical impulse watt-hour meter, DXM--indicates three-phase mechanical reactive impulse watt-hour meter, DTF--indicates three-phase four-wire mechanical multi-rate watt-hour meter, DSF-- Represents three-phase three-wire mechanical multi-rate watt-hour meter, DXF-represents three-phase mechanical reactive multi-rate watt-hour meter, DDS-represents single-phase electronic watt-hour meter, DD-represents single-phase mechanical Electricity meter.
Level selection
Electric energy metering devices in operation are divided into five categories according to the amount of electricity they measure and the importance of the measurement object:
Class I electric energy metering device
High-voltage billing users with an average monthly power consumption of 5 million kWh and above or transformer capacity of 10000kVA and above, generators of 200MW and above, grid-connected power of power generation companies, power exchange points between power grid operators, and provincial power grid operators Electric energy metering devices at power supply gateway metering points of power supply companies.
Type Ⅱ electric energy metering device
Electricity metering devices for high-voltage billing users with an average monthly power consumption of 1 million kWh and above or transformer capacity of 2000kVA and above, generators of 100MW and above, and power exchange points between power supply companies.
Type Ⅲ electric energy metering device
Billing users with an average monthly power consumption of 100,000 kWh and above or transformer capacity of 315kVA and above, generators below 100MW, power consumption in power plants (stations), metering points used for contracting and evaluation within power supply companies, and effective evaluation The electric energy metering device of 110kVA and above transmission line with electric balance.
Type Ⅳ electric energy metering device
An electric energy metering device for billing users with a load capacity of less than 315kVA, internal economic and technical indicators analysis and assessment of power generation and power supply enterprises.
Ⅴ class electric energy metering device
Electric energy metering device for single-phase power supply.
Class I electric energy metering devices should be equipped with at least 0.2s or 0.5s class active meters, 2.0 class reactive meters, and 0.2 class transformers.
Class II electric energy metering device should be equipped with at least 0.5s or 0.5 class active meter, 2.0 class reactive power meter, and 0.2 class transformer.
Class III electric energy metering devices should be equipped with at least a class 1.0 active meter, a class 2.0 reactive meter, and a class 0.5 transformer.