[RE-wrenches] Radian ROCB in Outback GSLC 120/240 AC

[Ray Walters]

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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