What are the specs of microwave transformer? Answered

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I am trying to build an AC arc welder from transformers. I need to know how many amps, volts and watts a normal microwave transformer outputs because i am trying to use different transformers, as i don't have two microwaves on hand. -Thank You

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Electric Spectre1

Best Answer 10 years ago

Depends on the transformer. Usually they have one primary input and two outputs. One output is either 2000vac ( they usually are) unless you have a really old one like I do and it puts out 12vac at 60amps. The secondary is 12v at low amps for running everything else (timer and what not) but if you have one that generates 2000v turn it around and you will get 12v 60amps out of the input. This is tricky though as sometimes the transformer will just blow the breaker.

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nbaker3

6 days ago

I may be given some samples of transformer winding wire red insulating varnish and need to give the company I requested samples from specifications of the wire I am using. They have asked me what is the resistance of 800 - 1200 Watt microwave transformer windings. Can anyone give me any idea as to what to respond to this, or better still to show me any 800W - 1200Watt microwave transformer specifications. I found this image so far, to do with available awg sizes.

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DIYBrandon

3 months ago

It varies. I have about a dozen microwave transformers and they vary from about 700w to 1200w, with 8-900w being most common. Your experience may end up being entirely different though. I started off trying to do exactly what you are. Instead, I've ended up with multiple other project builds with the transformers and an AC/DC dual voltage pulsed IGBT TIG/stick welder. I don't regret it for a heartbeat. Having the ability to weld opens MANY doors in terms of what I can make. And there is a LOT of room for me to grow into this welder. Though, whether a MOT welder build, or a commercially produced unit, the most important thing you can do is to make sure you have a circuit to power it. I installed a subpanel with a dedicated 240v 50a circuit just for my welder. And the difference between it and trying to run it on a 120v circuit from before is MASSIVE. Good luck and be safe

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Mr.l3

3 years ago

Also, I nearly got electrocuted from deadly dangerous current high voltage of microwave oven transformer. I got it on utube.

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DIYBrandonMr.l3

Reply 3 months ago

Que? What do you mean by "current high voltage"?

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ajithfrmmbteric m

Reply 8 months ago

GAL 800E means 800 watts, 700E means 700 Watts transformer.

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squirt8500

10 years ago

How many pins are the on the transformer? If you have a Multimeter try to see what pins connect to the other pins and if they do connect check how many ohms each connection is, the connection with less ohms will probably be the one that you connect to the wall and the connection with more ohms one will probably be the one connected to the welder.

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MickeyM53177242squirt8500

Answer 1 year ago

That's backwards for a welder - low resistance is the thicker wire/fewer windings that you want to attach to your welding rod/earth clamp, high resistance thinner wire/more windings you connect to the supply.

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Mr.l3

3 years ago

microwave oven transformer has 2200v output. Filament is 3v. 30amps I think. 900 watts to 1100 watts. I have three transformer I took apart of 8 microwaves. You can make a 200v or 240v out of two transformer. One transformer connect 2kv to two transformer secondaries. Then primary out is 200 or 240v. Works for every 120v to 240v electronics. Thank you for reading. -Trent Basden

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arunaravind

3 years ago

i have GAl-800E-3 model transformer.if it is used for make spot welding machine?