XGN2-12 ring main unit guide (RMU) is a high-performance, metal-enclosed indoor switchgear designed for 12kV power systems. With a compact structure, superior insulation, and reliable interlocking mechanisms, this unit is widely used in substations, power plants, commercial buildings, and industrial facilities for safe and efficient power distribution.
Product Structure & Functional Design
The XGN2-12 switchgear is composed of several functional compartments:
- Circuit breaker room (front lower section): Easy for operation and maintenance.
- Relay room (front upper section): Houses control instruments, switches, and signals.
- Busbar room (rear upper section): Well isolated for safety.
- Cable room (rear lower section): Designed for convenient wiring.
The cabinet is made from galvanized or stainless-steel panels using C and G profiles, with an IP-rated protection level of IPzX. Observation windows and facade indicators enable real-time status monitoring.
Technical Specifications
| Parameter | Value |
|---|
| Rated Voltage | 12kV |
| Rated Current (Main Bus) | 630A, 1250A, 1600A, 2000A |
| Rated Current (Branch Bus) | 630A, 1250A, 1600A |
| Short-Circuit Breaking Current | 16kA, 20kA, 25kA, 31.5kA |
| Short-Time Withstand Current (4s) | 16kA, 20kA, 25kA, 31.5kA |
| Peak Withstand Current | 40kA, 50kA, 63kA, 80kA |
| Power Frequency Withstand Voltage | Main: 42kV (1 min), Aux: 2kV (1 min) |
| Lightning Impulse Withstand | 75kV |
| Insulation Type | Air-insulated (≥125mm between phases and ground) |
| Cabinet Size (H×W×D) | 2650×1100×1200mm / 2650×1200×1200mm |
| Protection Class | IPzX |
Functional Highlights
- Rotary isolating switch design provides reliable physical disconnection with a metal-separation barrier.
- Mechanical interlocks ensure full “five-proof” safety, avoiding misuse or accidental operations.
- Enhanced insulation stability using high-creepage support insulators.
- Cable terminals placed 600–800mm from ground for easier installation.
- Rubber gaskets at cable entry points to prevent moisture and pests.
Environmental Operating Conditions
| Environment Factor | Specification |
|---|
| Ambient Temperature | -10℃ to +40℃ |
| Relative Humidity (Daily) | ≤ 95% |
| Relative Humidity (Monthly) | ≤ 90% |
| Altitude | ≤ 1000m |
| Seismic Intensity | ≤ 8 degrees |
| Site Condition | No severe dust, gas, chemical, or vibration |
Packaging & Delivery
- Each unit is packed in strong wooden crates with protective internal cartons.
- Suitable for sea and air transportation.
Applications
- Urban and rural power substations
- Power plants and renewable energy grids
- Commercial and industrial distribution networks
- Mining, railways, and petrochemical installations
Frequently Asked Questions (FAQ)
Q1: What makes XGN2-12 RMU suitable for indoor environments?
A: It has a sealed metal-enclosed design, IP-rated protection, and optimal insulation layout for compact indoor installations.
Q2: Can this switchgear support SCADA or automation systems?
A: Yes, we offer versions compatible with smart monitoring and remote operation systems.
Q3: What safety mechanisms are in place?
A: The unit uses full mechanical interlocking with “five-proof” safety functions, ensuring operator protection.
