Ran into a odd situation (or odd to me). Wired up a 100 KW generator for a dairy farm that was feeding a 400 amp ATS. It was a older generator and had one CT on one of the ungrounded wires.
We had some wire left over that was 350 kcmil and used that which is rated for 250 amps so we parralled 2 sets good for 500 amps. When we had the one CT on phase A, the generator was working properly. After we installed the second set of conductors, we put the CT on the B phase instead because it just fit better around the wire. Wasn't a lot of room in that area. Then the generator would not generate any power. The generator would run but not generate any power. Switched A phase with B phase on second set of wires which were directly across from the first set and still didn't generate any power ( not that I thought that would fix the issue). Once we put the CT back on A phase on the original set of wires, everything worked properly. Any idea why this happened and how close in length should the parallel conductors should be? The one set is about 10 inches longer than the others at the generator to be able to fit into the provided lugs.
We had some wire left over that was 350 kcmil and used that which is rated for 250 amps so we parralled 2 sets good for 500 amps. When we had the one CT on phase A, the generator was working properly. After we installed the second set of conductors, we put the CT on the B phase instead because it just fit better around the wire. Wasn't a lot of room in that area. Then the generator would not generate any power. The generator would run but not generate any power. Switched A phase with B phase on second set of wires which were directly across from the first set and still didn't generate any power ( not that I thought that would fix the issue). Once we put the CT back on A phase on the original set of wires, everything worked properly. Any idea why this happened and how close in length should the parallel conductors should be? The one set is about 10 inches longer than the others at the generator to be able to fit into the provided lugs.
