Step down transformer help

[Engineer Ric]

I'm designing a box to power a variety of Lenze VFD's. HP is irrelevant as they will only need powered to be programmed and sent off as replacements. I'm trying to use 480V 3PH to power the all drives that will need programmed. Drives voltage inputs are as follows: 208V 3PH, 480V 3Ph, and 575V 3Ph. Obviously the 480V drives are not an issue to power, and the 575V drives will power up with 480V as well to be programmed. I'm struggling to find a cost friendly step down transformer from 480V to 208V. Also the 208V drives only need two legs of 120V to power up. L3 is not needed to get the display on and the parameters set.

You guys have any ideas or links to some simpler control transformers? Amps are nearly arbitrary as the drives will not be interlocked to output any voltage to U,V, and W load terminals.

Thanks!

 

[itsmoked]

For your 208V delight use any of these.

Use one as an auto-transformer using only the primary. Leave the secondary unconnected.

factorymation Control_Transformers/FMX_CPT_Group_J

Keith Cress
kcress -

http://www.flaminsystems.com

 

[Engineer Ric]

Thanks for your quick reply 'itsmoked'. I was able to find a 2KVA transformer here in house and just successfully powered a 208V 3PH Lenze VFD using the two legs from the secondary of the transformer wired to X1 and X4 with a jumper from X2 to X3.

Thanks!

 

[itsmoked]

That's cheaper yet.

Keith Cress
kcress -

http://www.flaminsystems.com