Normal working condition of instrument transformer

1. operating environment temperature is -40, ~+85, relative humidity is not more than 95% (25 degrees centigrade), the altitude is not more than 1000m;

2. the rated voltage is 9600V, the waveform of the power supply should be sine wave, and the distortion coefficient of the waveform is not greater than 5%;

3. there is no serious pollution in the atmosphere in the place of use.

4. there is no serious vibration and bump in use place;

5. there should be no external strong magnetic field which has nothing to do with work.