Otis VIP260 82GA generatorsgreenspun.com : LUSENET : Elevator Problem Discussion : One Thread |
I have recently had the unpleasant experience of having two AC windings shorting together on an 82 Otis generator. This was on the monday morning, after I had shut the elevator down on the previous friday afternoon, needing a new hook contact (HCC). Lo, I have the precious commodity in my warm little hands, and have turned the elevator on. The generator did not start because I had ECR 3,4 blocked. As I pushed in LG to move the elevator from the top floor, the most awful growling noise erupted. Simultaneously, from the commutator end, a blue arc as big as my boss's behind flared. Oh, and a deliciously flavoured pall of smoke poured out as well.My question, and I do have one, is, once I have received my rewound generator back from repair, is there anything I should be wary of? Like floor levels, up and down speeds ( compounding ) , slowdowns or anything similar?
-- Justin Ward (Transitive@planetaccess.com), January 17, 2002
Unless you had the comm. turned and undercut there will not be any change Regards, Jim
-- Jim Reed (flyglasair@aol.com), January 19, 2002.
you may need to re-compound if the venders have moved the neutral point, however you should always recheck the neutral point and compound as a matter of course. it has been known to come back from venders with bad componding. always recheck! saves a court appearance mole
-- mole (mole@aol.com), January 19, 2002.
After much procrastination, my 82 generator arrived back to site. Gleaming, almost too presentable. A quick push of L, then M to check the direction of rotation went off without a hitch. Thence, a speed check on inspection speed. Up and down direction speeds appeared to be about equal. I summoned the courage to send it on a fullspeed run. Wincing as it neared the terminal floors, It stopped perfectly.Having heard horror stories about the wye and delta windings of an rewound MG set wired in opposite directions, I was a little apprenhensive. But all worked out well. And I did fit that new HCC contact after all that.
-- Justin Ward (transitive@hotmail.com), January 23, 2002.