Ningbo Yong Wei Electronics Co., Ltd.
Add：No.8 Xinheng Third Road, private industrial park, Cicheng Town, Jiangbei District, Ningbo
1, common causes of thermal relay failure
The current flowing through the thermal relay overload or short circuit load; thermal relay rated current does not match with the actual load current; motor operated too frequently; the thermal relay mechanism is ineffective, the thermal overload protection components not thermal relay; thermal relay connection thread contact caused by bad fever burned out. Relay manufacturers
2, thermal relay common troubleshooting methods
The thermal relay specifications to choose appropriate, too small to thermal relay misoperation, and the main current of thermal relay is easy to burn out the main circuit; too large will cause thermal relay action. So in the choice of thermal relay, thermal relay to make the middle rated adjustment range of rated current motor control coincides with the value of the load, the thermal relay has a certain range of current regulation is the best.
Second, check the circuit failure, after the elimination of short circuit fault, the replacement of the appropriate thermal relay.
Change the operation mode of motor, reduce the number of starting motor.
The replacement of qualified thermal relay action sensitive.
The oxide layer is removed to wiring head with thermal relay terminals, the main wiring and re compression of thermal relay.