Application

The motor protector SE-B1 device is special developed for electric drives which may not switch on again automatically after thermal trip.

Functional description 

Up to 9 PTC-sensors in acc. to DIN 44081/082 with different nominal response temperatures can be connected in series to the measuring circuit input (orange leads). Hence it is possible to monitor one or several temperature points with only one SE-B1 control module. If any thermistor exceeds its response temperature, its resistance increases above trip level and the output relay drops out. The motor can be restarted after cooling down below the response temperature and the lockout function of the output relay is released by interrupting the supply voltage. In case of removing jumper B1-B2 the lockout function is bypassed. The relay is fed out as a potential-free change-over contact. Under good conditions the relay is pulled in. Sensor and mains circuit are galvanically isolated.