Just came back to this as I have been given a Petter AC2 with an Allam 415 / 240 3 phase generator on it. The guy couldn't start it and was glad to see the back of it. Got it home and as I couldn't hear it squeaking decided to check the lift pump sucking from the base tank. Sure enough it wasn't pumping but I soon rectified that and after it bled itself with some repetitive action I cranked it up. Took off immediately, up to the 3000 rpm as stated on the casing. Anyway I was planning on making it single phase 240/ 120 and looked back at the zig zag connection sent by dieselgman a while back (diag G) and the way I see it there should be high voltage output between L2 and L0 and low between L1 and L0. Between L1 and L2 would bring you back to 460 v wouldn't it
Couldn't another L0 be placed between the T2,T8 & T6, T12 connection? My unit has separate windings for excitation, a capacicitor, a transformer and a bunch of diodes. I only see 6 wires apart from 3 for the excitation so I guess the main windings are connected inside somewhere. Still to be investigated. I just had to go and look at a 1987 HL6 generator unit that is on automatic standby but failed to run in a recent power cut. It has a tank in the base and a lift pump along with a leak at the base of the rotary injection pump that allowed air to enter the system and prevented it starting. So Sunday I have to go and replace the joint and bleed it again. We have to do it at the weekend because it is at the university law department and they get a bit miffed when it starts !!!
Blue