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XGN-12 Solid-Insulated Fully Enclosed Ring Main Switchgear
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Structural Features
The XGN-12 switchgear cabinet is constructed with high-quality cold-rolled steel sheets, treated with electrostatic powder coating for excellent corrosion resistance and long service life. The cabinet is divided into three independent compartments:
1. Busbar Compartment – safely enclosed to ensure stable power transmission
2. Circuit Breaker / Load Switch Compartment – equipped with vacuum circuit breakers or load break switches
3. Cable Compartment – designed for easy cable connection and maintenance
All compartments are separated by grounded metal partitions to prevent fault propagation and improve operator safety.
Key Functional Advantages
• High Safety Level: Fully metal-clad structure with interlocking mechanisms prevents misoperation
• Reliable Switching Performance: Uses vacuum circuit breakers with high breaking capacity
• Compact Design: Space-saving solution suitable for indoor installations
• Easy Operation & Maintenance: Clear mimic diagrams, indicator lights, and front-access design
• Strong Environmental Adaptability: Suitable for harsh industrial environments
Detailed Technical Parameters & Rated Electrical Parameters
• Rated Voltage: 12kV
• Rated Insulation Voltage: 12kV / 42kV (power frequency / lightning impulse)
• Rated Frequency: 50Hz / 60Hz
• Rated Current: 630A, 1250A, 1600A (optional)
• Rated Short-Time Withstand Current:
• 20kA / 4s
• 25kA / 4s
• 31.5kA / 4s
• Rated Peak Withstand Current: 50kA / 63kA / 80kA
Circuit Breaker Parameters
• Type: Vacuum Circuit Breaker (VCB)
• Breaking Capacity: Up to 31.5kA
• Mechanical Life: ≥10,000 operations
• Electrical Life: ≥50 operations at rated short-circuit current
Protection & Control
• Protection Functions: Overcurrent, short circuit, earth fault, overload
• Control Voltage: DC 110V / DC 220V / AC 220V (optional)
• Metering: Ammeter, voltmeter, energy meter (digital or analog)
• Indication: On/off status, fault indication, warning lights
Environmental Conditions
• Installation Type: Indoor
• Ambient Temperature:
• Maximum: +40°C
• Minimum: −10°C (can be customized to −25°C)
• Relative Humidity:
• Daily average ≤95%
• Monthly average ≤90%
• Altitude: ≤1000m (custom design available for higher altitudes)
Mechanical & Installation Parameters
• Cabinet Structure: Metal-enclosed, floor-mounted
• Ingress Protection: IP4X (cabinet), IP2X (internal compartments)
• Cable Entry: Bottom or top entry (customizable)
• Busbar Material: Copper or aluminum (optional)
Typical Applications
• Medium voltage substations
• Industrial power distribution systems
• Commercial buildings and shopping centers
• Power plants and renewable energy projects
• Urban and rural distribution networks
Conclusion
The XGN-12 high voltage switchgear is a mature, cost-effective, and internationally recognized solution for 12kV power distribution systems. With its robust construction, high safety standards, flexible configuration, and excellent electrical performance, it meets the demands of modern power networks and industrial users. It is an ideal choice for customers seeking reliable medium voltage switchgear for long-term operation.
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FAQ
Find answers to common questions about the XGN-12 solid-insulated ring main unit, including insulation technology, switching configuration, interlocking, environmental adaptability and project customization.
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What is the rated voltage of the XGN-12 solid-insulated ring main unit?
The XGN-12 solid-insulated ring main unit is designed for **12kV-class three-phase AC 50Hz power distribution systems**. It is commonly used for receiving, distributing, controlling, and protecting electrical energy in medium-voltage distribution networks.
Where is the XGN-12 ring main unit normally used?
The XGN-12 is suitable for a wide range of medium-voltage distribution applications, including: * Urban residential distribution networks * Industrial plants * Commercial buildings * Prefabricated substations * Distribution network terminals * Infrastructure projects * Ring-main power systems * Secondary substations Its compact and fully enclosed structure makes it especially suitable for locations with limited installation space.
What is the difference between solid-insulated switchgear and conventional ring main units?
In solid-insulated switchgear, the main high-voltage conductive components are encapsulated in solid insulating material such as epoxy resin. Compared with conventional air-insulated designs, this structure can reduce the influence of dust, humidity, condensation, and other external environmental conditions on the main insulation system. It also allows a more compact equipment design.
Does the XGN-12 use SF6 gas?
This XGN-12 series uses a **solid-insulation design**, with major high-voltage components encapsulated in solid insulating material. This reduces dependence on gas-insulated structures for the main insulation system. The exact insulation and switching configuration should still be confirmed according to the selected functional unit and project specification.
What switching device is used inside the XGN-12?
Depending on the selected configuration, the XGN-12 can use vacuum switching technology. The vacuum interrupter can be integrated with the main conductive circuit and insulating support structure to form a compact functional unit. The final switching device configuration should be confirmed according to the required feeder, transformer protection, or circuit breaker function.
Can the XGN-12 be configured for different ring-main schemes?
Yes. The cabinet can be configured according to the project single-line diagram, including different combinations of: * Incoming feeder units * Outgoing feeder units * Ring-main units * Transformer protection units * Circuit breaker units * Metering units * Busbar connection units Please send your single-line diagram so that the correct panel combination can be selected.
What safety interlocking functions are available?
The XGN-12 can be designed with mechanical and electrical interlocking to reduce the risk of incorrect operation. Typical interlocking may coordinate: * Main switch or circuit breaker * Disconnector * Earthing switch * Cable compartment * Cabinet door The final interlocking logic should follow the project operating and safety requirements.