What are the control and protection systems of a crane

What are the control and protection systems of a crane

As an editor specializing in price information for bridge cranes in China, today I will explain to you what control and protection systems a crane has:

Electrical equipment serves as the "brain" of the bridge crane, encompassing devices such as power supply introduction, control, protection, and lighting, ensuring the safe and reliable operation of the crane.

Electric motor:

Function: To provide power for the lifting and operating mechanisms of cranes. Typically, three-phase asynchronous motors are used, which feature high starting torque and good speed regulation performance.

controller

Function: Controls the starting, stopping, forward and reverse rotation, and speed regulation of electric motors, including cam controllers and master controllers. Cam controllers are suitable for small-capacity cranes and are easy to operate; master controllers are suitable for large-capacity cranes and offer high control accuracy.

Resistor:

Function: Used for starting, speed regulation, and braking of electric motors, limiting the starting current and current variations during speed regulation, and protecting electric motors from damage.

Protective device:

Types: including overcurrent protection, zero position protection, voltage loss protection, limit protection, safety switch, etc.

Function: To prevent faults such as overload, short circuit, phase failure, and voltage loss during the operation of the crane, ensuring safe operation of the equipment. For example, when the crane approaches the end of the track, the limit protection device will automatically cut off the power supply to prevent the crane from derailing.

Lighting and signaling devices:

Function: Provides working lighting and signal indication to facilitate observation and operation by operators. Includes lights, warning lights, speakers, etc., ensuring safe operation of the crane even at night or in low-light environments.