XGN66-12 high-voltage switchgear

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The XGN66-12 high-voltage switchgear is a complete set of indoor high-voltage electrical products with excellent performance and wide application. The following is its detailed introduction:

### Structural Features
- **Cabinet Structure**: It is welded with high-quality angle steel. The circuit breaker compartment is located in the middle (lower) part of the cabinet, which is convenient for installation, debugging and maintenance.
- **Disconnector**: It adopts reliable rotary disconnectors, allowing safe access to the circuit breaker compartment for maintenance while the main busbar is energized.
- **Protection and Interlocking**: The protection level of the whole cabinet is IP2X. It is equipped with a reliable and fully functional mandatory mechanical interlocking device, which can simply and effectively meet the "Five Prevention" requirements, namely, preventing incorrect opening and closing of the circuit breaker; preventing opening and closing of the disconnector under load; preventing hanging the grounding wire or closing the grounding switch when the equipment is energized; preventing closing the switch with the grounding wire or grounding switch in place; preventing unauthorized entry into the energized compartment.
- **Observation and Grounding**: The door is equipped with an observation window, through which the working status of the components inside the cabinet can be clearly observed. It has a reliable grounding system to ensure the safety of equipment and personnel.

### Technical Parameters
- **Rated Voltage**: 12kV.
- **Rated Current**: Commonly 630A, 1000A, 1250A, 2000A, 2500A, 3150A, etc.
- **Rated Short-Circuit Breaking Current**: 20KA, 31.5KA, etc.
- **Rated Short-Time Withstand Current (4S)**: 20KA, etc.
- **Rated Peak Withstand Current**: 50KA, 80KA, 100KA, etc.
- **Rated Short-Circuit Making Current (Peak)**: 50KA, 80KA, 100KA, etc.
- **Operation Modes**: Electromagnetic type, spring energy storage type, etc.

### Working Conditions
- **Altitude**: Not exceeding 1000m.
- **Ambient Temperature**: Ranging from -25°C to +40°C, with the average temperature within 24 hours not exceeding +35°C.
- **Relative Humidity**: The average daily relative humidity does not exceed 95%, and the average monthly relative humidity does not exceed 90%.
- **Anti-seismic Capacity**: The seismic intensity does not exceed 8 degrees.
- **Others**: There should be no places with severe vibration, impact or explosion hazards.

### Application Scenarios
It can be used in various types of power plants, substations, industrial and mining enterprises, high-rise buildings and other places. It can also be combined with ring main units and applied in switching stations.

### Advantages
- **Small Size**: It is only about 50% of the volume of ordinary switchgear, occupying a small floor area and saving space.
- **High Reliability**: The circuit breaker has high reliability and good performance, which can effectively ensure the stable operation of the power system.
- **Good Security**: The "Five Prevention" interlocking mechanism is reliable and simple, which can effectively prevent misoperation and ensure the safety of operators and equipment.
- **Convenient Maintenance**: With a reasonable structural design, each component is easy to repair and replace, reducing the maintenance cost and difficulty.