PM8000 meter Grounding

[WuKong]

Hi my friends:

My customer asked me about the grounding of the PM8000 meters. Since the power supply doesn't have ground, how do we ground the meter? For CT/PT we can rely on the external ground.

Thanks,

Rongjun Yao

[DanL · Accepted solution]

The PM8000 is a Class II or double insulated device and does not require a safety ground itself.

External CT secondaries and PT secondaries connected to the PM8000 must be grounded (as shown in the PM8000 installation guides).

see https://en.wikipedia.org/wiki/Appliance_classes#Class_II