ceb58
Senior Member
- Location
- Raeford, NC
We have relocated a 25kw gen. to a new site we are upgrading and I have ran into something that has me stumped. As said it is a 25kw 3ph 120/208v LP gas. The transfer switch is a Generac GTS 150 3ph 3 pole non-sds. we got every thing hooked up turned off utility power, gen. started, transferred and ran about 5 sec. and shut down on axu fault. Reset every thing and tried again same thing. Reset every thing this time I opened the main breaker on the MDP. Gen starts, transfers and every thing is good, correct voltage, no problem. Open all branch circ. close main, no problem Close branch breaker ph A that runs 18 new 4ft 2 tube t8 flor. fixtures, 8.7amp load,gen shuts down on fault. Reset every thing move light breaker to ph B. Kill utility, gen, starts, transfers and holds. turn on other loads on ph A no problem. Do it again with lights on ph C no problem. The only thing that will shut the gen. down on fault is having the lights on ph A. I installed the lights about 2 months ago and have been running on utility with no problem. 
