MGE UPS 60KVA Galaxy 5000

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danielah Member Join Date: Dec 2009 Posts: 6	MGE UPS 60KVA Galaxy 5000 07/26/2011 3:49 AM
	I have a UPS (MGE Galaxy 5000, 60kva). A month back, its PFC board, charger fuse and AC Normal fuses got blown after some mains power transients....and of course showing the respective alarms. I ordered for spares and have fixed them now. However, two of the AC Normal Fuses blow again while am trying to start up the unit i.e. immediately I close static by-pass breaker (Q4S). When I follow the circuit, the only thing between the Normal AC input fuse & the input breakers (Q1/Q4S) is the input filter board. Kindly assist me to troubleshoot the cause of this fault (blowing the ac normal input fuses)??
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: MGE UPS 60KVA Galaxy 5000 07/26/2011 9:56 AM
	What are the ohms readings downstream of the fuses? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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danielah Member Join Date: Dec 2009 Posts: 6	#2 In reply to #1 Re: MGE UPS 60KVA Galaxy 5000 07/27/2011 2:52 AM
	CURRENT IS 125AMPS VOLTAGE IS 690V AC IR IS 200KA CLASS IS AR NOT ABLE TO FIND THE OHMS AT THE MOMEMENT SIR. PLEASE ADVISE ON THE WAY FORWARD SINCE MY SYSTEMS ARE DOWN THANX
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HISMAK Participant Join Date: Jan 2013 Posts: 1	#3 Re: MGE UPS 60KVA Galaxy 5000 01/04/2013 4:56 AM
	The last time I had exactly the same scenario on my MGE Galaxy 5000 60kva....I found that one of "thyristors - for the yellow/middle phase" located behind the "normal AC main power supply board - CSNEN board" had failed. Immediately I replaced that with the "opened" input fuses....UPS worked perfect. HISMAK.
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danielah (1); HISMAK (1); PWSlack (1)

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