Low-voltage switchgear and controlgear, Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
低压开关设备和控制设备第8部分:旋转电机内置热保护(PTC)控制装置
Adopts IEC60947-8, Ed. 1.2 (2011) which specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to IEC60034-11, and the industrial application.