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Title: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: Nathanshort on July 28, 2011, 12:35:29 pm
Hey guys

I am looking into a new warehouse space, and I am looking for a good source
to get a 1:1 100-200 amp 3 phase  floor mounted Iso Transformer with accessories to mount
camlock panel for 3 phase tie in near it.

Transformer is to take 1950's industrial power 3 phase +ground,  no neutral 400 amp service.
So I believe my transformer will need what is called a neutral center tap.

I could be wrong about this,  but could still use a good source for this stuff.

Any help?
Title: Re: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: TJ (Tom) Cornish on July 28, 2011, 12:37:52 pm
Hey guys

I am looking into a new warehouse space, and I am looking for a good source
to get a 1:1 100-200 amp 3 phase  floor mounted Iso Transformer with accessories to mount
camlock panel for 3 phase tie in near it.

Transformer is to take 1950's industrial power 3 phase +ground,  no neutral 400 amp service.
So I believe my transformer will need what is called a neutral center tap.

I could be wrong about this,  but could still use a good source for this stuff.

Any help?
Are you looking for a Delta to Wye transformer?
Title: Re: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: Ricky Lighthall on July 28, 2011, 01:17:42 pm
Assuming there is no neutral on the service to the building, you would need a delta to wye transformer as Nathan said with the appropriate fused dissconnect.
Have you already verified that you do not have a "wild leg" type service?
Title: Re: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: Nathanshort on July 28, 2011, 02:05:34 pm
Assuming there is no neutral on the service to the building, you would need a delta to wye transformer as Nathan said with the appropriate fused dissconnect.
Have you already verified that you do not have a "wild leg" type service?

Well,  I am pretty sure there is no 240v leg,  but from all my years of gigging and touring,
I just don't know where to go shopping for camlock wall panels , tansformers, and matching large amperage dissconnects.  This is really what I am looking for, so that I can spec the materials I want.
Title: Re: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: Henry Cohen on July 29, 2011, 08:49:33 am
I just don't know where to go shopping for camlock wall panels , tansformers, and matching large amperage dissconnects.  This is really what I am looking for, so that I can spec the materials I want.
The transformer can be purchased through your local electrical supply distributor. Given the size you're looking at, be ready with a fork lift when delivered.

The Cam-Loc and disconnect panels (presuming you want 19" rack mount) can be purchased from any of the pro audio/lighting industry power distribution manufacturers such as Motion Labs and Lex.
Title: Re: Help with 1:1 ISO xformer 100-200 amp w camlock
Post by: Todd Black on August 10, 2011, 04:54:37 pm
Hey guys

I am looking into a new warehouse space, and I am looking for a good source
to get a 1:1 100-200 amp 3 phase  floor mounted Iso Transformer with accessories to mount
camlock panel for 3 phase tie in near it.

Transformer is to take 1950's industrial power 3 phase +ground,  no neutral 400 amp service.
So I believe my transformer will need what is called a neutral center tap.

I could be wrong about this,  but could still use a good source for this stuff.

Any help?

if your service has no neutral it is most likely Delta. Do you have a second 120/240 single phase service for lighting and appliance loads? Are you sure of the voltage on the 3ph service? It could also be 480...

As others have said, depending on your service you may need a 240D-120Y208 transformer. You need to find out what your voltage is. Where are you located?

Are you hooking this up yourself? Dont forget all the grounding and bonding requirements for the secondary of the transformer.

As far as cams, you may want to consider just putting a 3ph disconnect switch on the output of the xfmr and installing a set of cam tails on it after you see the low to mid 4 figure price tag on the 'company switch' type cam tie in panels.