Question about MGE Galaxy 3000 UPS System

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I have galaxy 3000 merlin heron 20 kva ups, the problem is fault on rectifier & it gave sound continuosly beep sound. thanks, if i can get sercuit diagram i love it

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Posted on Aug 23, 2010

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1 Answer

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hello

If this galaxy 3000 is of European Type ( that is having a radiator with coolant) , then after following proper BYPASS/Shutdown procedures, you could level the coolant in the radiator. You may require the tool kit that the supplier normally supply for this type of job.Generally the design was such that no evaporation could occur, however at times the top up is required. It may be as little as 20 (millilitre) Please check also the cooling fan just below the capacitor assembly. I hope this will help

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1 Answer

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From what info you gave me. It sounds to me like it is either too small for the load, or it is in a confined space where heat is building up (UPS has to be outside of a desk office, etc.) or the rectifier is going bad and heating up. I would check to see if it does it by hooking up a small load to it like a radio or something, and if it is in the open, not overloaded then rectifier is bad,I see it alot. I am a Master Electrician and have worked on many UPSs'. Remember that if you keep a UPS loaded to it's full potential (which you shouldn't do) it will get hot. The rule is to only load it up to 80% of it's rating and you will be fine. To find out how many amps it will handle you simply devide the VA of the UPS by the supply voltage. Example: 1200va UPS supplied by 120v. is good for 10 amps. 1200/120 = 12 amps, then it is wise to add 25% more to the watts or amps when sizing them. Also, if it has a cooling fan make sure it isn't blocked by lint and is working, if it isn't working it will get hot fast. Good luck!

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