[QUOTE=xcorps;130211] Its just a knob on the face of the panel separate from the easygen, 1 for each gen. When in parallel, easygen takes over. The QMED tried to adjust voltage last night and found out that fooling with voltage while in parallel puts us black ship.
No lock nut, not even tight to turn. You can roll a volt by looking at it crosseyed. The switchboard engineer who fixed the CT droop issues was supposed to come up with a solution for the pot, but it didn’t happen.[/QUOTE]
Yeah making small adjustment to voltage regulator on line should not cause a black out. You probably should be looking at a service call if that is happening.
Just by way of speculation and general info - From what I saw in the Easygen literature one output should be to the engine governor and that is going to be the control that load shares “real power” (kW). This Easygen thing also provides or can provide a fair amount of generator protection including operation of the generator breaker. But I did not see where it has an active role in voltage regulation so not sure how “it takes over”. But hey I see it has several analog outputs and maybe one heads on over to the AVR. Just not what I typically see on the plants I’ve worked on. More typically the AVR’s would be connected via a “cross current loop” to allow the AVR’s to excite their generators and control / share the “reactive power” (kVAR). When for whatever reason they are not sharing VAR’s properly this is where small adjustment of the trim pot can be used to fine tune the VAR part of the generator load. Proper operation means machines share kW and kVAR. If you see nice sharing of kW (and in absence of a VAR meter) you see gen amps not being shared the one generator is underexcited and this should be corrected by the AVR manually or automatically or by Easygen if that is in the loop.
This is the sort of device to use if possible. The black lever on the side will lock the adjustment.
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[QUOTE=cmakin;130220]Oh, and I did have assistance in getting the solution with my handy copy of Hubert’s book. I was lucky enough to have him as a teacher my Plebe year. . . .[/QUOTE]
I was lucky enough to be in his “juice” class as well. Can’t beat the hands on stuff he had us do including paralleling generators.