HGXN series power switchgear

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The HGXN series power switchgear usually refer to the HXGN-12 type metal-enclosed ring network switchgear. The following is a detailed introduction:

### Structural Composition
- **Cabinet**: It is assembled by bending and welding steel plates, and the protection level is generally IP2X. The cabinet consists of four columns, an upper cover plate, a lower bottom plate, a front panel, a back panel, side panels and other components. It has a solid structure and can effectively protect the internal electrical components.
- **Busbar Chamber**: It is located at the upper part of the cabinet. The busbars are usually made of copper bars, and there is sufficient insulation distance between different phases of busbars and between the busbars and the cabinet to ensure safe operation.
- **Load Switch Chamber**: It is located in the middle of the cabinet. Insulating partitions are set between the load switch and other components to prevent faults such as phase-to-phase short circuits and ground short circuits.
- **Instrument Chamber**: It is generally located at the front of the busbar chamber and separated by steel plates. It is used to install various measuring instruments, protection devices and control elements, which is convenient for monitoring and controlling the operating status of the power distribution cabinet.

### Technical Parameters
- **Rated Voltage**: It is generally 12 kV and is applicable to the high-voltage distribution systems of user projects such as 10 kV.
- **Rated Frequency**: It is usually 50 Hz, which is consistent with the power supply frequency of the power grid.
- **Rated Current of Busbar**: Commonly, it is 630 A, etc. Different busbars with different rated currents can be selected according to the actual load requirements.
- **Rated Short-Circuit Breaking Current**: It is generally within a certain range, such as 20 kA, 25 kA, etc. It can cut off the circuit in time when a short-circuit fault occurs to protect the safety of equipment and lines.

### Working Principle
- **During Normal Operation**: The load switch is in the closed state. The power source supplies power to the load through the busbars and the load switch. The current transformer monitors the current magnitude in real time, the voltage transformer monitors the voltage situation, various instruments display the operating parameters, and the protection device monitors the circuit state in real time.
- **When a Fault Occurs**: When overload, short-circuit and other faults occur in the line, the current transformer detects the fault current, and the protection device will act rapidly according to the preset protection setting value, trigger the load switch to open, cut off the faulty circuit, and then protect the safety of equipment and lines.

### Features and Advantages
- **Compact Structure**: The cabinet is reasonably designed, and the internal components are compactly arranged, which can effectively reduce the occupied area. It is suitable for places with limited space, such as box-type substations and distribution rooms in urban power grids.
- **Safe and Reliable**: It adopts a fully enclosed structure with a high protection level, which can effectively prevent personnel from getting an electric shock and the impact of the external environment on the equipment. It has complete mechanical interlocking and electrical interlocking devices to prevent misoperation and ensure the safety of equipment and personnel.
- **Convenient Operation**: The operating mechanism of the load switch is generally of the spring energy storage type, equipped with a quick closing and quick opening device, with a small operating force. It can be operated manually or electrically, and the operation is simple and convenient, which is convenient for maintenance personnel to operate and maintain.
- **Maintenance-Free or Low-Maintenance**: High-performance electrical components and advanced manufacturing processes are selected to reduce the failure probability of the equipment and the maintenance workload, and reduce the operation and maintenance costs.

### Application Scenarios
- **Urban Power Grid Reconstruction and Construction**: It can be applied to the 10 kV distribution systems in urban residential areas, commercial areas, high-rise buildings and other places to realize the distribution, control and protection of electric energy and improve the reliability of power supply and the quality of electric energy.
- **Industrial and Mining Enterprises**: It is suitable for the high-voltage distribution rooms of various industrial and mining enterprises to provide stable and reliable power supply for the production equipment in the factory and meet the production power requirements of the enterprises.
- **Box-Type Substations**: As the core equipment in box-type substations, it can convert the high-voltage power source into a voltage suitable for low-voltage equipment to provide power support for the surrounding areas.