Peterjon
19-08-2014, 04:49 PM
Hi. Advice please gentlemen.
Had a spot burn on a semi compressor (Bock HGX34P/215-4 S ) stator winding. Took the stator for re winding. When I tried to refit the stator to the crank side the windings were sticking out too far and would not fit. Back to re winders who heated up the casing to get the windings to go in more. Better but still would not fit. Back to re winders who put the stator back in the oven to soften the winding resin to mould them deeper into the casing.
Re fitted. Replaced oil sep. Fitted a double core burn out drier. Vacuum and re gas. Did an oil change. Oil pickup sieve perfectly clean. Sieve on suction inlet to compressor. Flushed out suction accumulator. Switched on Friday evening. Checked amps and voltage all good. Monday morning compressor tripped on manual motor starter/overload. Found another spot burn on the winding. Re winders say I had contamination. As in a small piece of metal got in with the windings and shorted.
My argument is if that were the case it would have lasted longer than a few hours. And the cause was perhaps at a join in the winding or the re winder not been careful enough with all their playing around to get the windings deeper into the casing.
Your opinions will be appreciated.
Had a spot burn on a semi compressor (Bock HGX34P/215-4 S ) stator winding. Took the stator for re winding. When I tried to refit the stator to the crank side the windings were sticking out too far and would not fit. Back to re winders who heated up the casing to get the windings to go in more. Better but still would not fit. Back to re winders who put the stator back in the oven to soften the winding resin to mould them deeper into the casing.
Re fitted. Replaced oil sep. Fitted a double core burn out drier. Vacuum and re gas. Did an oil change. Oil pickup sieve perfectly clean. Sieve on suction inlet to compressor. Flushed out suction accumulator. Switched on Friday evening. Checked amps and voltage all good. Monday morning compressor tripped on manual motor starter/overload. Found another spot burn on the winding. Re winders say I had contamination. As in a small piece of metal got in with the windings and shorted.
My argument is if that were the case it would have lasted longer than a few hours. And the cause was perhaps at a join in the winding or the re winder not been careful enough with all their playing around to get the windings deeper into the casing.
Your opinions will be appreciated.