Why can SPD with Uc= 320vac be applied to 380VAC voltage system?
Tags:SPD Why can SPD with Uc= 320vac be applied to 380VAC voltage system? 2020-08-26 Why can SPD with Uc= 320vac be applied to 380VAC voltage system? 520

In the three-phase power supply system, the line voltage (L-L) is 380VAC, while the phase voltage (L-N; L-PE; L-PEN) is 220VAC. SPD is normally only used between L-N, L-PE or L-PEN of which the Un is 220VAC. So UC = 320VAC will be big enough.


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