This photo is a Bell and Gosset variable speed
pump controller as it arrived from the factory. The drive is located
behind the disconnect, and is an ABB drive. For some reason it does not
seem safe to be reaching around the conductors to program the drive! The
conductors would be energized because the power would have to be on to
program the drive. Are there any violations here that you know of?
(A
Correction from John) 05/02/00 - It appears I was mistaken on the VSD
Manufacturer. It is Square D not ABB. The pump controller, VSD & bypass
contactor is a standard assembly from Bell & Gosset. Each of the separate
units are UL listed, including the cabinet but there does not appear to be a
UL listing for the assembled unit.
.....The unit was energized yesterday by a Factory authorized representative. I
have sent a request to the manufacturer for their input on the safety issue
John Hanlon, PE (via Joe Tedesco)
Associate Mechanical Construction Engineer
New York State OGS Design & Construction
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