The difference between high voltage motor starter cabinet and high voltage distribution cabinet

High-voltage motor starter cabinet and high-voltage distribution cabinet are two important equipment in the power system. They have obvious differences in structure, function, application, etc.

1. High voltage motor starting cabinet

1.1 Definition of high voltage motor starter

High-voltage motor starter is an electrical device used to control the start, operation and stop of high-voltage motors. It is usually composed of high-voltage circuit breakers, contactors, relays, protection devices, etc., which can realize the start, operation, stop and protection of motors.

1.2 Working principle of high voltage motor starter

The working principle of the high-voltage motor starter is to control the start and stop of the motor by controlling the on and off of the high-voltage circuit breaker and contactor. During the startup process, the starter will first close the high-voltage circuit breaker, and then connect the motor to the power grid through the contactor to start the motor. During operation, the starter will monitor the running status of the motor in real time. Once an abnormal situation is found, the power supply of the motor will be cut off immediately to protect the motor from damage.

1.3 Functions of high voltage motor starter cabinet

The high voltage motor starter has the following main functions:

(1) Starting control: It can realize various starting modes such as soft starting, star-delta starting, autotransformer starting, etc. of the motor, reducing the impact of starting current on the power grid.

(2) Operation control: It can realize the functions of motor operation status monitoring, fault diagnosis, fault protection, etc. to ensure the safe operation of the motor.

(3) Stop control: The motor can be stopped in various ways, such as emergency stop and normal stop, to meet different production needs.

(4) Protection function: It can realize various protection functions such as overload protection, short circuit protection, overvoltage protection, undervoltage protection, etc. to protect the motor from damage.

1.4 Application of high voltage motor starter cabinet

High-voltage motor starter cabinets are widely used in petroleum, chemical, steel, electric power, mining, construction and other industries. They are mainly used to control the start, operation and stop of high-voltage motors to ensure the safe, stable and efficient operation of the motors.

2. High voltage distribution cabinet

2.1 Definition of high voltage distribution cabinet

High-voltage distribution cabinet is a kind of distribution equipment used in high-voltage power system, which is mainly used to receive, distribute and control high-voltage electric energy. It is usually composed of high-voltage circuit breaker, disconnector, grounding switch, current transformer, voltage transformer, relay, protection device, etc.

2.2 Working principle of high voltage distribution cabinet

The working principle of the high-voltage distribution cabinet is mainly to receive, distribute and control high-voltage electric energy by controlling the on and off of high-voltage circuit breakers and disconnectors. When receiving electric energy, the distribution cabinet will first close the high-voltage circuit breaker to introduce electric energy into the cabinet; when distributing electric energy, the distribution cabinet will distribute electric energy to different loads or branch lines through the disconnector; when controlling electric energy, the distribution cabinet will monitor, control and protect electric energy through relays, protection devices, etc.

2.3 Functions of high voltage distribution cabinet

The high voltage distribution cabinet has the following main functions:

(1) Power reception: It can realize the reception of high-voltage power and provide a stable power supply for the power system.

(2) Power distribution: It can realize the distribution of high-voltage power to meet the needs of different loads or branch lines.

(3) Power control: It can realize the control of high-voltage power, including the on-off, switching, and regulation of power.

(4) Power protection: It can realize the protection of high-voltage power, including overload protection, short circuit protection, overvoltage protection, undervoltage protection, etc.

2.4 Application of high voltage distribution cabinet

High-voltage distribution cabinets are widely used in power systems, industrial enterprises, commercial buildings and other fields. They are mainly used for receiving, distributing and controlling high-voltage electric energy to ensure the safe, stable and reliable operation of the power system.

3. The difference between high-voltage motor starter cabinet and high-voltage distribution cabinet

3.1 Structural Differences

High-voltage motor starter cabinets are mainly composed of high-voltage circuit breakers, contactors, relays, protection devices, etc., and are mainly used to control the start, operation and stop of high-voltage motors. High-voltage distribution cabinets are composed of high-voltage circuit breakers, disconnectors, grounding switches, current transformers, voltage transformers, relays, protection devices, etc., and are mainly used for receiving, distributing and controlling high-voltage electric energy.

3.2 Functional Differences

The main function of the high-voltage motor starter is to control the start, operation and stop of the high-voltage motor, and it has the functions of start control, operation control, stop control and protection. The main function of the high-voltage distribution cabinet is to receive, distribute and control high-voltage electric energy, and it has the functions of electric energy reception, electric energy distribution, electric energy control and electric energy protection.

3.3 Differences in Application

High-voltage motor starter cabinets are mainly used in industries such as petroleum, chemical, steel, electricity, mining, and construction to control the start, operation, and stop of high-voltage motors. High-voltage distribution cabinets are widely used in power systems, industrial enterprises, commercial buildings, and other fields to receive, distribute, and control high-voltage electrical energy.