This is not sound-related, but I know some of the members here have way more experience with electricity than I do, so any and all suggestions are welcome. I am a mechanical engineer and although I understand the basics of electricity, this is a bit out of my knowledge base.What I am looking for is a way to switch on/off a large transformer at my day job. Actually it is three transformers in a sheet-metal enclosure. Each transformer is about the size of my head (one for each of 3 phases) and the enclosure is about the size of a mini-fridge. It is used to step up our 240V 3-phase service to 480V in order to test some of our products. The problem is that this testing only occurs infrequently. With the warm weather we are getting now, the shop does not really cool down much at night because this transformer is on 24/7 and produces a fair amount of heat (it is hard-wired into our breaker box). Even when we roll out the a/c unit (portable), it really just cancels out/keeps up with the heat from the transformer. If we can shut off the transformer we could actually get the temperature in the shop down to a comfortable level.When I first started looking online for switches, I came across several that were rather pricey ($2k-$3k). While this may end up being what we need, I am looking for a cheaper solution. And just to throw this out there, I donít really care if it meets code or is dangerous (3-gang knife-blade switch, anyone?). I want to look at all options before presenting anything to the powers that be. If itís cheap enough, I might even buy it myself!The contacts should be rated (so I am told) at 125A, though that seems a little high to me. What other questions need to be answered first? Any help is appreciated.
What size breaker is feeding this transformer? That, along with the information plate on the transformer will be used to determine the size disconnect. A simple nonfused disconnect should run a couple of hundred dollars. I found this for under $200, Eaton DG324UGK.What about using the circuit breaker feeding it to turn it off? Some are switch rated for long term use.
The bigger question is: How have you been a member here for 3 1/2 years, and racked up over 100 posts and not had your account locked for not posting with your real name?
Cosmo is his real (and only) name. The bouncer checked his ID....
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