For an amphitheater I have a 200A and 400A 208/120V 3Ø company switches and they want a single isolation transformer for these. 208V is our primary voltage. Can I use a single 225kVA 208-208/120V isolation transformer and double tap it to serve both of the company switches?
Isolation Transformers and Double Tapping
- Thread starter aeagle
- Start date
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
A few questions.
What do you mean by "company switch".?
What do you mean by "double tap"?
What do you mean by "isolation transformer"? I think the transformer would need to have its secondary grounded to a GES to meet code. It would also need to be bonded.
If you need the full 600 Amps, a 225 kVA transformer at 208 V 3/phase would be 625 Amps, so it can certainly handle the load.
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
"Company switch" is where a traveling show connects their own power distribution.
Yes, one transformer can supply two disconnects provided you abide by tap and overcurrent-protection rules.
If they actually want a transformer there (why???), they as above it needs to be properly bonded/etc as an SDS.
Yes, one transformer can supply two disconnects provided you abide by tap and overcurrent-protection rules.
If they actually want a transformer there (why???), they as above it needs to be properly bonded/etc as an SDS.
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