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Can a QO230GFI breaker operate on a high leg B phase system?

Issue:  
Can you use a QO-GFI breaker on a 240/120V high-leg delta system?

Product line:  
Residential circuit breakers

Environment:  
QO-GFI circuit breakers

Resolution:  
The GFI breakers can be used on a high-leg system, however not on the high leg.  Voltage to ground must not exceed 120Vac.  The high leg is 208V to ground.  They could connect to A and C phases.
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