What batteries are you using? I've had flooded lead acid batteries have
several mA of current flowing to ground through the acid mist along the
side of the battery. I had the battery bank supposedly isolated but got
a shock and traced the connection to ground to the middle of the battery
pack. I removed the "offending battery" and the ground connection just
jumped to another cell.
Very bizarre, but definitely a real shock.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/4/2016 9:33 AM, Drake wrote:
Hello Wrenches,
I'm hooking up a Radian with a Remote Operated Circuit Breaker for AC
coupling. With only the positive inverter cable connected, we found
battery voltage at the negative inverter cable with all switches off.
Humm.
It turns out that the Remote Operated Circuit Breaker (ROCB) control
circuit is the culprit. This is factory connected to the battery side
of the main breakers in the GS Load Center. The voltage present gave
my assistant a minor shock when he tried to hook the negative inverter
cable to the battery.
When the negative battery cable lug touched the negative battery
terminal, a sound came from somewhere that sounded like a super fast
relay chatter. One tech support person thought it could be the ROCB
trying to close, as it was open (off) position. The tech support
people are only able to speculate about what might be happening.
Another tech support person said that if the factory wiring on the
relays was correct, it would be impossible to get a shock. Going
thought the diagram in figure 2 of the attachment, it looks to me that
voltage would conduct to the negative battery cables if all the relay
contacts were positioned as shown in figure 2.
Has anyone hooked up the GSLC AC 120/240? Have you had any unusual
voltages or noises before turning on the main DC breakers? From Figure
2, do you think it would be possible to get a complete circuit through
the relays before the main breaker is turned on?
Thanks,
Drake
/Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/
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