240VAC to drive, Bond one leg ?

[milmat1]

Folks,
I have a control system being designed. We have one oddball servo drive that requires 240VAC, single phase, from my 480V/3Phse supply. So we added a dedicated transformer to supply the 240 VAC single phase to the servo drive. With a 2-pole breaker in front of the transformer. And a 2-pole breaker in front of the drive.
Is there any need to bond one of the secondary leads to the earthing system?

 

[zbang]

If you don't, how will a fault to ground/earth trip the breaker? (And it's likely that the servo drive may be expecting that one lead to be earthed.)

 

[ptonsparky]

You don't have the option of 240/120 secondary?

 

[don_resqcapt19]

The code does not require a two wire 240 volt system to be a grounded system, but if you make it an ungrounded system you will have to provide a ground detector per 250.21(B)

 

[hbiss]

We have one oddball servo drive

Is it European?

-Hal