I'm going through the Photovoltaic Systems book in preparation for the NABCEP Solar PV entry level exam.
I'm stumped by the following. I understand that a grounding system is integrated into the PV system so that if a component blows up, current dissipates and does not shock a person.
I also understand the role of a ground-fault protection device in the PV system. If the insulation on hot wires is damaged, the hot may energize the ground wire. This presents a fire hazard.
But, how is the ground-fault protection device not activated when current flows through ground because of an actual fault in the system? How does the ground-fault protection actually work?
Thank you.
I'm stumped by the following. I understand that a grounding system is integrated into the PV system so that if a component blows up, current dissipates and does not shock a person.
I also understand the role of a ground-fault protection device in the PV system. If the insulation on hot wires is damaged, the hot may energize the ground wire. This presents a fire hazard.
But, how is the ground-fault protection device not activated when current flows through ground because of an actual fault in the system? How does the ground-fault protection actually work?
Thank you.