I was wondering if someone could help in determining the proper stepdown transformer for a commerical system. I'm being provided by the power company a 200Amp / 480V 3 Phase power system and I want to convert it to 200Amp / 240V Single power system. Is there an online program to do this conversion?
How to size a Stepdown Transformer?
- Thread starter jlee777
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- Massachusetts
Before going to far here can I ask you what field you are in?
Also is there any particular reason you do not want to use a 208Y/120 system?
It makes little sense to throw away a phase.
Also is there any particular reason you do not want to use a 208Y/120 system?
It makes little sense to throw away a phase.
adrian33773
Member
Usually, where I'm at anyway, the power company installs the transformer and the service drop or lateral. We just take over from there with the service entrance conductors and service equipment. The power company usually connects their equipment to ours. We do, however, some large commercial jobs where we stub the underground service entrance conductors out of the ground. Then the power company puts there transformer on top of those and makes the final connection. They put a lock on that equipment when they leave. So I would say if you want 240/120 1-phase or 208/120 3-phase you would have to order that service from the power company.
- Location
- Massachusetts
fellhauer said:
75 KVA
If you want to get all you can from a 200 amp panel.
- Location
- Massachusetts
engy said:
Yes, I agree.
The 75 will have a capacity of 208 amps at 208 volts.
Generally we use a 75 KVA to supply a 225 amp panel. :smile:
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