Question about MGE Galaxy 3000 UPS System

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Power electronics experts sought for UPS problem

Uninterrupted Power Supply (UPS) of GE make - problem with IGBT & inverter driver section. Want to know if repair is possible instead of modular replacements which are very expensive.

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The Galaxy 3000 is not GE but APC (formerly MGE). Repairs are quite possible with qualified technicians. Where are you located?

Posted on Aug 23, 2010

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1 Answer

How can I solve the inverter fault in SMX1000?


Check igbt or power mosfets on the inverter circuit and replace it

Oct 07, 2014 | Computers & Internet

Tip

Benefits of a UPS (Uninterrupted power supply


We all use many devices and equipments that run on electricity. For all these to function properly they need uniform power supply (constant flow of electricity). As the electric supply in many countries is not uniform there is a need for a device to correct it. There are many such devices available in the market today. For example UPS (Uninterrupted power supply), Voltage Stabilizer, Constant Voltage Transformer are such devices available today.<br /> <br /> <b><u>Why buy a UPS?</u></b><br />We can never guarantee that we will get constant power. The power supply always has fluctuations. Surges, Spikes, Brownouts, Blackouts and Noise can damage your electrical appliances especially your computer. To prevent this from happening you need a device that does power conditioning. Electricity has to be uninterrupted. If the voltage is higher than the specified level then it is 'Over Voltage'. If the voltage is lower than the specified level then it is 'Under Voltage'. Both Spike and Surge come under 'Over Voltage' category. But there is a small difference between spike and surge. If there is very high voltage for an instant but comes back to normal immediately then it is called 'Spike'. If there is very high voltage for a slightly longer period then it is called 'Surge'. If the voltage is dangerously reduced to very low within a short period of time then it is called 'Brownout'. When this happens, the computer can be seriously damaged. If the power supply is totally cut then it is called 'Blackout'. Noise can mix with electromagnetic or radio waves or any signals. This is called 'Line Noise'. This may also reduce the voltage level to very low within a short period of time.<br /> <br /> <b><u>How can the UPS provide power when the main electrical supply is cut?<br /></u></b>A UPS has an internal battery. With this battery charger, an Inverter is also present. The inverter converts the 'Direct current' supplied by the battery to 'Alternatinc current' as required by the computer. When there is electrical supply the charger in the UPS charges the internal battery. When there is a power cut, the battery kicks in to supply the DC which is converted to AC by the inverter and power is supplied to computer.<br /> <b></b> <br /> <b><u>What if the battery loses its power?</u></b><br />When there is power cut, the required power is taken from the battery. Therefore the battery keeps losing its capacity. If the power supply comes back before the battery is depleted then the battery charger will start recharging, but if the power supply doesn't come back then the battery keeps supplying until it totally drains out. When the battery drains below a certain level the UPS sounds an alarm for your to shut down your computer and turn off the UPS. Some UPS' even have a built in system that shuts your computer down for you after a certain amount of UPS uptime.<br /> <b></b> <br /> <b><u>How long can the UPS provide power when there is a blackout?</u></b><br />This all depends on the specifications of the UPS and the requirement of the computer. A 600vA UPS for example can supply power to a computer with a 550W power supply for about 10 minutes or more.<br /> <b></b> <br /> <b><u>Tips for buying an UPS</u></b><br />The backup time of your UPS is the most important you need to consider. Other than that, you should know how many KVA (Kilo Volt Ampere) your UPS has. A computer needs atleast 0.5 KVA (500VA) to function. If you are planning to connect more than one computer to a single UPS then you need to get one with a higher KVA.<br /> <b></b> <br /> <b><u>What type of battery does a UPS use?</u></b><br />UPS uses <b>SMF</b> batteries (Sealed Maintenance Free). These type of batteries can be used for 5 to 7 years continuously.

on Mar 05, 2011 | Computers & Internet

2 Answers

GE LP33 UPS inverter failed to start


Dear Yared,

Did you try to give the UPS some time to recharge the batteries?
Seems like the batteries have reached their cut-off voltage and are not supplying enough voltage to the inverter.

Normally the dc boos circuit of the UPS will supply voltage to the DC BUS so maybe the problem can be found in the dc boost circuit or BUS if recharging the batteries is not helping.

Let me know.

Best Regards,


Ron

Jan 22, 2013 | MGE Computers & Internet

1 Answer

Dear sir, We have 1 ups having problum with


Very complicated these items. I have not been able to repair even apparently simple faults, manufacturers such as emerson/leibert do not release cct diagrams, so very difficult to fix as there are many different sections (pfc,rectifier,charger,upconverter,bypass,inverter) of the circuit all interconnected with a micro processor monitoring and controllling the whole thing. You have to be really lucky to sort out any problem particulary one with blown components.

Hope this helps

Thanks for using FixYa

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Aug 12, 2010 | Liebert UPStation GXT 2U GXT2-1500RT120...

2 Answers

We re having problem with the 9120 powerwere UPS...no backup when the utility (commercial power ) is not available...the UPS shut down, and all LEDs went off.


open the ups and check whether the battery faulty or not if faulty replace it, if ok then check mosfet or IGBT used in inverter section if faulty replace it problem wil be solved

Mar 09, 2010 | Eaton Powerware® 9120 UPS System

1 Answer

My UPS Powerware 9120 6kva. At inverter section. what is the component type for Q213,Q214,Q215 and Q216, i means type and it part number. Can U forward to me the Service Manual for that UPS. TQ


no but I can tell you that for old ups mosfets are used and for new ups IGBT (insulated gate bipolar transistor )are used the IGBTs are not available on shops you have to take help of company

Feb 18, 2010 | Powerware 9120 UPS System

1 Answer

How to set up Power backup using Batteries and an Inverter


Having only two batteries and an inverter is not an UPS (uninterrupted power supply) does not make a backup power system.
How are the batteries charged up and maintained?
What is the output voltage from the inverter?
Does this voltage suit the Netgear wireless router?
I suggest you get a proper UPS and connect the Netgear power adapter to the UPS. There are small UPS units available 350VA which will suit your needs.
I use a larger UPS from APC for my computer and my wireless router and found the unit very reliable.
Check out APC WEB site - click on this link - then your country and select back-UPS ES for home computers :-
www.apc.com

Nov 12, 2009 | NetGear WGR614 Wireless Router

2 Answers

Dc bus faulty


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. There maybe one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault.

These lower powered and cheaper KVA type UPS are switch over types, when the mains supply fail, the UPS switches over to the inverter in milli-seconds which then supplies mains power but the power waveform is a pseudo sine wave (ie not a true sinewave. A faulty inverter circuit won’t deliver power when the mains supply fails.

The true UPS types are usually the higher KVA units (over 1500 VA) that supplies uninterrupted mains power. The mains power is connected to a charger which charges the batteries and the inverter draws power from these batteries and converts it to true sine wave mains power therefore there is no switch over time lag from the mains to the battery.

Oct 22, 2009 | Powerware 9120 UPS System

1 Answer

Sir after changing the battery ups worked well one day and the next day onwards when i pressed the switch red and amber lights blinking and the upc trips with beep sound .kindly give the solution


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. There maybe one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault.

These lower powered and cheaper KVA type UPS are switch over types, when the mains supply fail, the UPS switches over to the inverter in milli-seconds which then supplies mains power but the power waveform is a pseudo sine wave (ie not a true sinewave. A faulty inverter circuit won’t deliver power when the mains supply fails.

The true UPS types are usually the higher KVA units (over 1500 VA) that supplies uninterrupted mains power. The mains power is connected to a charger which charges the batteries and the inverter draws power from these batteries and converts it to true sine wave mains power therefore there is no switch over time lag from the mains to the battery.

Oct 16, 2009 | APC Computers & Internet

1 Answer

Manual for UPS Model P2-1000C


it seems you have a knack about inverters? why dont you just pull up a circuit and build it inside since you have not been able to get a solution to the repair you did.

May 12, 2007 | Exide 850ERT 850VA (fc010bb2a0a0a0a) UPS...

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