Patent ID: 11909353
Assignee: KEHUA HENGSHENG CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 2:
3. The ground-fault detecting device of claim 2, further comprising:
a second detecting module, having a first terminal coupled to a grounding electrode on a DC (Direct Current) side of the photovoltaic power generating system, and a second terminal coupled to the ground, for generating a first sampled current; and
a third detecting module, having a first terminal coupled to a non-grounding electrode on the DC side of the photovoltaic power generating system, and a second terminal coupled to the ground, for generating a second sampled current;
wherein the controller is further arranged to determine if the ground-fault occurs in the DC side before the photovoltaic power generating system is connected to the grid and to determine if the ground-fault occurs in the DC side and the AC side when the photovoltaic power generating system is connected to the grid according to the first sampled current and the second sampled current.