Stronger processing Three-phase multi-function ammeter

??A multifunctional power meter is a testing instrument that integrates multiple testing functions and has the advantages of versatility and high accuracy.?

Electrical requirements：

1. Power consumption: Under reference voltage, reference temperature, and reference frequency, the active power and apparent power of the voltage line of the energy meter are less than 1W and 6VA; At the basic current, reference temperature, and reference frequency, the apparent power of the current line of the energy meter is less than 1VA

2. Voltage and voltage impact: The specified working range is 0.9Un to 1.1Un, the maximum working range is 0.7Un to 1.3Un, and a 380V voltage is applied to the voltage line for 1 hour without any damage. After the test, the meter should be able to work normally

3. Power interruption impact: After testing according to regulations, the power interruption has no substantial impact on the electricity meter

4. Short time overcurrent impact: able to withstand 30Imax overcurrent without damage, applied for half a cycle at rated frequency. After the test, the energy meter should work normally with an error change of no more than ± 1.5% (I=Ib, cos phi=1.0)

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Working conditions:

1. Standard reference voltage: 220V

2. Standard reference current: 5A, 10A, 15A, 20A

3. Maximum current: 4 times or more of the rated current, and operate at 1.2 Imax for 1 hour. The instrument should not be damaged

4. Standard reference frequency: 50Hz

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