In order to protect the safety of the jib crane and to disconnect the power supply in case of failure, to avoid personal safety accidents and equipment damage, the jib crane will be equipped with protective appliances.
Common electrical protection appliances and functions:
1. Circuit breaker: when the main circuit is short-circuited, immediately disconnect the main circuit to prevent the current from excessively impacting the electrical components;
2. Thermal relay: when the motor is overheated, it can disconnect the motor power in time;
3. Zero voltage relay: it can prevent undervoltage of the circuit;
4. Fuse: when the control circuit is short-circuited, the current is too large, causing the fuse to blow, thus breaking the circuit;
5. Limit switch: it is used to avoid damage when the jib crane is lifting and walking beyond the stroke.
The requirements for jib crane protection appliances are protected within the required range, and the action is sensitive, rapid, safe and reliable. In addition to the above protective appliances, it also includes switchboards, reverse connectors, overcurrent overloaders and the like.
