F-Frame 150A, 600 Vac/250 Vdc, 3-pole thermal magnetic automatic molded case switch.
Automatic molded case switches open instantaneously at a factory preset magnetic trip point, calibrated to protect only the molded case switch itself, when it is subjected to high fault currents. The trip point is nonadjustable and provides no overload or low level fault protection. Open when the handle is switched to the OFF position or in response to an auxiliary tripping device such as a shunt trip. They accept the same lugs and accessories as equivalent thermal-magnetic circuit breakers.