Can the secondary main breaker in an MPZ10S40F be a GFI breaker?

Issue:
Can the secondary main breaker be  a GFI breaker in a sealed mini power zone unit substation?

Product Line:
Low Voltage Transformers

Environment:
Mini Power-Zone LV Substation

Resolution:
The standard secondary main breaker is a QO260. If a QO260GFI were used, the secondary would no longer have a neutral connection and would be limited to 240 volts only and no single-pole 120V branch breakers would be allowed.

Released for:Schneider Electric USA