What is the "1 phase 3 phase" rating on the circuit breaker label?

FA175820

28 September 2021

Issue:
What is the 1 phase 3 phase rating on the circuit breaker label?

Product Line:
Powerpact, Masterpact

Resolution:
The single phase - three phase rating is specifically for the Grounded B Phase (Corner Grounded Delta) system.
See the below example for a 240 Vac corner grounded system, and ratings for 2p and 3p QD breakers