Jpflex
Electrician big leagues
- Location
- Victorville
- Occupation
- Electrician commercial and residential
what method of testing or troubleshooting would yall recommend for finding a possible ground fault within a field solar array?
On our pv site we have solar arrays feeding inverters to produce to the grid.
Often times a field ground fault trips the inverter fuse wich is in series with the pv negative side. At this point the inverter chassis is bonded to the negative pv arrays similar to service neutral bonding point at one location
Currently my company has technicians test voltage to ground at this GFDI negative point with GFDI fuse open. The negative wire to ground is neg 600 vdc and supposedly will drop 2 volts per second if a ground fault is present in the field.
I would rather wrap an ammeter around the inverter chassis ground and check for current draw appraching 5 ampere limit instead of this voltage drop test.
The voltage test has not always been accurate as faults have been in the inverter on one ocation and not tge field while using this test.
I also dont understand the voltage drop test?
On our pv site we have solar arrays feeding inverters to produce to the grid.
Often times a field ground fault trips the inverter fuse wich is in series with the pv negative side. At this point the inverter chassis is bonded to the negative pv arrays similar to service neutral bonding point at one location
Currently my company has technicians test voltage to ground at this GFDI negative point with GFDI fuse open. The negative wire to ground is neg 600 vdc and supposedly will drop 2 volts per second if a ground fault is present in the field.
I would rather wrap an ammeter around the inverter chassis ground and check for current draw appraching 5 ampere limit instead of this voltage drop test.
The voltage test has not always been accurate as faults have been in the inverter on one ocation and not tge field while using this test.
I also dont understand the voltage drop test?
