cabinet is a common low - voltage electrical device

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which is widely used in the power system. The following is a detailed introduction to it:

### Overview

GGD is the abbreviation of "Fixed - Partitioned Low - Voltage Distribution Cabinet". It is applicable to the

 power distribution system with an alternating current of 50Hz, a rated working voltage of 380V and below, 

and a rated current of up to 3150A. It is used for the conversion, distribution, and control of electrical energy

 in power, lighting, and power distribution equipment.

### Structural Features

- **Cabinet Structure**: The cabinet of the GGD low - voltage distribution cabinet adopts a universal cabinet 

form. The frame is made of 8MF - type open - section steel, and the side panels and door panels are made of 

high - quality cold - rolled steel plates, which are processed and bent by numerical control equipment. This 

kind of cabinet structure has good strength and stability, and can effectively protect the internal electrical components.

- **Partition Design**: The space inside the cabinet is reasonably divided into a busbar chamber, an electrical 

appliance chamber, a cable chamber, etc. according to functions. Each chamber is independent of each other, 

which can effectively prevent the spread of faults and facilitate installation, maintenance, and repair. For example, 

the busbar chamber is used to install busbars, providing power transmission for the entire distribution cabinet;

 the electrical appliance chamber installs various electrical components to achieve the control and protection of

 the circuit; the cable chamber is used for the laying and fixation of incoming and outgoing cables.

###Electrical Performance

- **Rated Parameters**: Its rated working voltage is generally 380V, and some can also be applicable to voltage

 levels such as 400V. The rated current ranges from several hundred amperes to 3150A, which can meet the 

needs of different electrical loads.

- **Short - circuit Withstand Capacity**: The GGD distribution cabinet has a relatively strong short - circuit

 withstand capacity and can usually withstand a short - circuit current of dozens of kilo - amperes or even higher. 

This benefits from its reasonable busbar layout and electrical connection design, as well as the selection of high

 - performance electrical components. When a short - circuit fault occurs, it can ensure the safety of the cabinet 

and electrical components and reduce the impact of the fault on the system.

###Component Configuration

- **Circuit Breaker**: It is used to cut off and connect the circuit. It automatically trips in case of faults such as 

overload and short - circuit to protect the circuit and equipment. Common types include molded - case circuit 

breakers and frame - type circuit breakers, which are selected according to different current ratings and protection requirements.

- **Contactor**: It is mainly used to control the start, stop, forward and reverse rotation of loads such as motors.

 It realizes the closing and opening of contacts through electromagnetic force, and has the characteristics of 

convenient control and rapid action.

- **Thermal Relay**: It is used for the overload protection of motors. When the motor is overloaded, the bimetallic

 strip of the thermal relay heats up and deforms, pushing the contacts to act, cutting off the control circuit, and 

releasing the contactor, thus protecting the motor.

- **Fuse**: As a short - circuit protection component, when a short - circuit occurs in the circuit, the fuse element

 melts quickly, cutting off the circuit and playing a protective role.

###Application Scope

- **Industrial Field**: It is widely used in the power distribution systems of various factories, providing power

 distribution and control for production equipment, lighting systems, ventilation and air - conditioning systems, etc.,

 such as machinery manufacturing factories, chemical enterprises, and electronics factories.

- **Commercial Buildings**: In commercial places such as shopping malls, office buildings, and hotels, it is used to 

distribute power to equipment such as lighting, elevators, air - conditioners, and fire - fighting facilities, ensuring

 the normal operation of commercial activities.

- **Residential Buildings**: It can be an important device in the community power distribution room, providing 

low - voltage power distribution for residential buildings to meet the daily electricity needs of residents, such as

 power supply for lighting, sockets, home appliances, and other electrical equipment.#electriacaltransformer 

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