MCCB for line protection — 80 A, 3-pole, TM240 release
Its TM240 thermal-magnetic release provides overload and short-circuit protection for distribution feeders and panel main incomers. The breaker carries a breaking capacity of 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — these ratings govern the available fault current the device can safely interrupt at each system voltage, which is the primary selection criterion for coordination studies. Above 55 °C the current must be reduced: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C.
Auxiliary and trip configuration
The integrated auxiliary trip uses order code 3VA9688-0BL33. A voltage trigger is present, and a trip indicator gives local visual confirmation of a tripped state.