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Powerware 9125 makes the circuit breaker trips out

Hi all, I have a POWERWARE 9125 which badly fails: when I turn it on, it makes the circuit breaker to trip. I tries with and without the battery. If I charge the battery using a second 9125, the first powerware is able to generate the output voltage. But as soon as I turn the main voltage on, the main power circuit trips :-( I familiar with 8/16/32 bits MCU, memory buses... but not with hig current systems! So any help will be welcomed. Thanks & best regards. JM

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Posted on Jan 02, 2017

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SOURCE: I am looking for schematics for a Powerware 9125

This may not help, but it is the best I can find:

http://www.hmcdistributor.com/web/wp-content/uploads/2007/07/powerware-ups-9125-users-guide-5000-6000-va.pdf

Posted on Mar 11, 2010

Testimonial: "Thanks for the lead, but no schematics there, really appreciate the rapid response."

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SOURCE: help me!!! my eaton powerware

chek the optocoupler 3sd12

Posted on Sep 16, 2010

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SOURCE: Hello, my Powerware 3105 beeps

Your problem is showing up under the Powerware 9305 (a very large UPS) but your comments are about the 3105. It sounds like your battery is dead. If your UPS is over 3-5 years old, that's most likely the case. The website address to view the user manual is www.eaton.com/3105 You can contact Eaton directly, too. Eaton bought Powerware about 6 years ago. Here's the contact info. Be sure to have your serial and model numbers ready from the rating label on your UPS.

Toll Free: 1 800 356 5737
E-mail: SinglePhaseTS@eaton.com

Posted on Dec 17, 2010

  • 39 Answers

SOURCE: Battery Packs for Powerware 9355 UPS

If you battery packs are all at 130volts DC, then all of the packs will have become dead, and the batteries are not recoverable. Your battery DC bus voltage on a Powerware 9355 20 to 40kVA rated UPS is nominal 432 volts DC - 36 batteries in series in each string at 12 volts DC per battery. If batteries go below 10.5 volts DC each, or 378 volts DC bus voltage, no amount of charging will recover these batteries. You should not be recycling the DC battery breaker, unless you felt the battery breaker was faulty. The UPS would have given you an alarm message of either battery breaker Off, Charger Failure, or Low DC Bus Voltage long before the these batteries failed.
The battery test will not proceed if the batteries are dead.

Posted on Feb 11, 2011

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http://www.hmcdistributor.com/web/wp-content/uploads/2007/07/powerware-ups-9125-users-guide-5000-6000-va.pdf

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Most modern ups units will not start at all without the batt, so disconnect the extra packs beg, borrow some new or old good batt blocs same spec as the original internal ones, as this is just a test any set of batts that is just ok will do.

fit them to the ups unit and see if it will start. if it will then you will need to replace all the batt blocs in the whole system.

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If you are not happy fitting /working with batteries then get a tech to do this work for you, batteries are very dangerous, they are always live and need to be handled with care at all times.

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2. Remove the battery backups. Without good batteries they are useless so why waste your time silencing alarms. Just make sure that the computers are plugged into a surge-protected outlet and you save your work frequently when there is bad weather.

FYI: Retail UPS batteries are only good for 2-3 years and high-end commercial batteries are only good for 3-5 years.

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