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Re: Test Alternator Output
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Posted by T_Bone on August 08, 2006 at 14:09:11 from (4.240.42.167):
In Reply to: Re: Test Alternator Output posted by Bob M on August 08, 2006 at 10:30:25:
Hi BobM, I was working on a AC unit at a 50KW radio transmitter one day when my meters went bananas. At the time I had a couple good anolog and three digital VOM's and when taking a voltage reading would spike to 800vac or so. So off 60miles to town to the local utility company to complain of a bad transformer that needed replaced. The FM radio transmitter had it's own power supply so I thought that's why the voltage spikes were not bothering the TX. Well the utility engineer was not impressed with what I told him was happening with his transformer, so off to the job site to see for himself. After there for a hour we finally observed one voltage spike at 900v. Well he said it's not there problem as a transformer can't do that. Well then please tell me what's causing the high voltage spikes? I can't and he goes back to the office. Well I finish changing the compressor and have my meters on for start up and I'm rock solid at 231vac. I'm setting my digital ampmeter and notice my voltmeter going banana's again. Then it dawned on me as I heard the DJ talking. My meters couldn't take the scattered magnetic field of the 50kw transmitter while the DJ was broadcasting and caused my meters to read false. As soon as the DJ quit transmitting, my meters would read normal. T_Bone
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