Overview
Metal Enclosed Switchgear is designed for 3-10kV three-phase AC 50Hz power systems for efficient power acceptance and distribution, especially suitable for frequent operation scenarios (such as industrial and mining enterprises, substation power distribution systems). Its busbar system supports a single busbar standard configuration and can be expanded to a single busbar with bypass or double busbar structure to meet different power grid topology requirements.
Core Component Configuration
The cabinet complies with GB3906 and IEC298 standards and features comprehensive "five-prevention" interlocking functions to ensure operational safety.
Main Switch
Standard configuration includes the ZN28A-12 series vacuum circuit breaker, with optional configurations such as the ZN63A-12 or ZN28-12 integrated circuit breakers.
Operating Mechanism
Compatible with CD10, CD17A electromagnetic mechanisms or CT198 spring mechanisms, ensuring rapid opening and closing.
Isolation Switch
The main circuit uses the GN30-12 rotary isolation switch, while the bypass system is equipped with the GN19-12 isolation switch, enhancing operational flexibility.
Technical Specifications
|
Serial Number |
Name |
Unit |
Data |
|
1 |
Rated voltage |
kV |
3.6, 7.2, 12 |
|
2 |
Rated frequency |
A |
630~3150 |
|
3 |
Rated short-circuit breaking current |
kA |
16, 20, 31.5, 40 |
|
4 |
Rated short-circuit making current (peak) |
kA |
40, 50, 80, 100 |
|
5 |
Rated withstand current (peak) |
kA |
40, 50, 80, 100 |
|
6 |
Rated short-time withstand current |
kA |
16, 20, 31.5, 40 |
|
7 |
Rated insulation level |
- |
1-minute power frequency withstand voltage: 25, 32, 42 kV between poles and between poles and ground; 27, 36, 48 kV between breaks. Lightning impulse withstand voltage: 40, 60, 75 kV between poles and between poles and ground; 46, 70, 85 kV between breaks. |
|
8 |
Rated short-circuit duration |
s |
4 |
|
9 |
Protection rating |
- |
IP2X |
|
10 |
Structural type |
- |
Single busbar sectioning and single busbar with bypass. |
|
11 |
Operating mode |
- |
Electromagnetic type, spring-storage type |
|
12 |
External dimensions (width × depth × height) |
mm |
1200×1300×2650 (40KA or ≥2000A) |
|
13 |
Weight |
kg |
200~1000 |
Note: The height of the assembled switchgear cabinet may be 2660 mm.
Environmental Adaptability
• Temperature: -15°C to +40°C (daily average ≤35°C)
• Altitude: ≤ 1,000 meters (reduced capacity required for altitudes above 1,000 meters)
• Humidity: Daily average ≤95%, monthly average ≤ 90% (no condensation)
• Seismic Resistance: 8-degree intensity
• Environmental Requirements: No corrosive/flammable gases, no dust contamination, no severe vibrations.
Note: If operating conditions exceed the above ranges (e.g., extreme cold, high humidity, high altitude), a customized solution is required to ensure performance.
External Dimensions And Installation Base Diagram
Structural Features
Metal Enclosed Switchgear features a metal-enclosed cabinet structure, with the following primary structural characteristics:
Cabinet Structure: The cabinet frame is constructed from welded structural steel, ensuring durability and reliability. The interior is divided into separate compartments for the circuit breaker, busbar, cable, and relay rooms, with each compartment separated by steel plates to ensure electrical isolation and safety.
Function of Each Compartment
The above are the main structural features of Metal Enclosed Switchgear, ensuring its safe, reliable, and efficient operation.
Circuit Breaker Compartment
Located at the lower front of the cabinet, it is equipped with an operating mechanism and interlocking mechanism to ensure safe operation. It features a pressure relief channel to prevent high-pressure gas generated by internal arcs from damaging the equipment.
Busbar Compartment
Located at the upper rear of the cabinet, the busbars are supported by high-strength ceramic insulators and arranged in a V-shape to reduce the cabinet height. It is equipped with a voltage monitoring device to monitor the busbar voltage status.
Cable Compartment
Located at the rear lower part of the cabinet, it supports insulators for cable fixation and is equipped with a grounding switch to ensure safe and reliable cable connections.
Relay Compartment
Located at the front upper part of the cabinet, it has mounting plates for installing various relays and other secondary components. The compartment includes terminal block brackets, and the door can accommodate indicator instruments and signal components.
Maintenance and Inspection
The switchgear adopts a dual-sided maintenance design. The front allows for maintenance of secondary components in the relay compartment, maintenance of the operating mechanism, and mechanical interlocking components. The rear allows for maintenance of the main busbar and cable terminals. Each compartment is equipped with maintenance doors for convenient daily maintenance and inspection.
Mechanical Interlocks
To prevent misoperation, the switchgear employs mechanical interlock design, ensuring that all components act in the correct sequence during power-off and power-on operations. This prevents dangerous situations such as operating isolating switches under load, mistakenly opening or closing circuit breakers, or entering live compartments.
Ordering Information
You must provide the following information:.
● Electrical drawings: Main circuit scheme number, system wiring diagram, layout diagram, and floor plan;.
● Control circuit design: Auxiliary circuit schematic diagram, terminal layout diagram;.
● Component list: Cabinet component model, specifications, and quantity;.
● Appearance requirements: Enclosure color (default light gray, customization available);
● Special Requirements: Extreme environmental conditions (e.g., low temperature/high humidity), enhanced protection, or seismic reinforcement requirements.
If project conditions exceed the above specifications, please contact us for a customized solution. We are committed to providing the best tailored solution for your unique requirements.
XGN口-12(Z) switchgear, which is a stable, safe, and efficient power distribution solution. Its modular design, high reliability, and flexible expandability can significantly improve the operating efficiency and safety of power systems, providing a solid guarantee for continuous power supply requirements.
Product Certificate
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