News
4. According to connection modes, electric energy meters can be classified as connection through transformers and direct connection. Current from connection through transformers: 3X0.3 (1.2) A, 3X0.5 (2) A, 3X1.5 (6) A, and 3X5 (10) A, etc.
Current from direct connection: 3X5 (20) A, 3X10 (40) A, and 3X20 (80) A, etc. Now current specifications of energy meters are mostly wide load. Take 3X5 (20) A as an example. 5 represents rated current and (20) stands for maximum current rating, four times the rated current.
5. According to measuring accuracy, electric energy meters can be classified as: watt-hour: class 0.2S, 0.5S, 0.5, 1.0 and 2.0; var-hour: class 0.5, 1.0 and 2.0.
6. According to purposes, electric energy meters can be divided into single phase energy meter, three-phase watt-hour energy meter, three-phase var-hour energy meter, maximum demand meter, multi-rate energy meter (time-based), multifunctional watthour meter, loss-of-voltage timer, copper loss meter, iron loss meter and prepayment energy meter, among others.
