Electric energy meter model selection
1. Category code: D--watt-hour meter
2. Group code indicates the 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 Co., Ltd. is 666.
To sum up the above points:
DDSY-means single-phase electronic prepaid watt-hour meter,
DTSY-means three-phase four-electronic prepaid watt-hour meter,
DTSF--represents three-phase four-wire electronic multi-rate watt-hour meter,
DSSF-means three-phase three-wire electronic multi-rate watt-hour meter,
DSSD-means three-phase three-wire multi-function watt-hour meter,
DTSD-means three-phase four-wire multi-function watt-hour meter,
DTS-means three-phase four-wire electronic active watt-hour meter,
DSS--indicates three-phase three-wire electronic active watt-hour meter,
DS--means three-phase three-wire mechanical active watt-hour meter,
DT--represents three-phase four-wire mechanical active watt-hour meter,
DX--Mechanical reactive watt-hour meter,
DTSX-means three-phase four-wire electronic reactive watt-hour meter,
DSSX-means three-phase three-wire electronic reactive watt-hour meter,
DTS(X)---indicating three-phase four-wire electronic active and reactive power combined watt-hour meter,
DSS(X)---indicating three-phase three-wire electronic active and reactive power meter,
DSM-means three-phase three-wire mechanical pulse watt-hour meter,
DTM--represents a three-phase four-wire mechanical pulse watt-hour meter,
DXM-represents a three-phase mechanical reactive pulse watt-hour meter,
DTF-means three-phase four-wire mechanical multi-rate watt-hour meter,
DSF-means three-phase three-wire mechanical multi-rate watt-hour meter,
DXF--represents a three-phase mechanical reactive multi-rate watt-hour meter,
DDS-stands for single-phase electronic watt-hour meter,
DD-stands for single-phase mechanical watt-hour meter.
DT862 is a three-phase four-wire active watt-hour meter, the number string behind should be -4-3*15(60), where 4 represents the multiple of the maximum current and the rated current; 3*15(60) represents three groups The rated current of the current coil is 15A, and the maximum current is 60A.
Electric energy meter grade selection
Electric energy measurement devices in operation are divided into five categories according to the amount of electrical energy they measure and the importance of the measurement object:
1. Similar electric energy metering device
High-voltage billing users with an average monthly power consumption of 5 million kWh and above or transformer capacity of 10,000 kVA and above, generators of 200 MW and above, grid-connected power of power generation companies, power exchange points between power grid operating companies, and provincial power grid operating companies with The electric energy metering device at the power supply gateway metering point of the power supply enterprise.
2. Similar electric energy metering device
Electric energy 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.
3. Similar electric energy metering device
Billing users with an average monthly power consumption of 100,000 kWh and above or a transformer capacity of 315kVA and above, generators below 100MW, power consumption at power plants (stations), metering points used for contract assessment within power supply companies, and active assessment Power-balanced 110kVA and above transmission line electric energy metering device.
4. Class 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.
5. Class electric energy metering device
Electric energy metering device for single-phase power supply
1. Class-like electric energy metering devices should be equipped with at least 0.2s or 0.5s class active power meters, 2.0 class reactive power meters, and 0.2 class transformers.
2. Class-like electric energy metering devices should be equipped with at least 0.5s or 0.5 grade active power meter, 2.0 grade reactive power meter, and 0.2 grade transformer.
3. Class-like 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.