(under subclass 91) Subject matter wherein the circuit breaker breaks two or more separate conducting paths for two or more phases of alternating current.
(1) Note. The poles are insulated from each other and are coupled in such a manner as to operate simultaneously.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9, for auxiliary shunt circuit interrupter.
44, for air-current blowout circuit interrupter.
58, for puffer piston circuit interrupter.
71, for sealed chamber circuit interrupter. 119+, for vacuum circuit interrupter.
