XGW-12 Ring Main Unit
This XGW-12 Ring Main Unit RMU features a fully integrated design combining primary power apparatus and secondary automation systems. Primary Equipment: Circuit breakers, disconnectors, and load break switches. Secondary Equipment: Microprocessor protection relays, smart meters, and remote control devices (DTU/FTU).
- Product Introduction
The XGW-12 Ring Main Unit (RMU) is an advanced power distribution solution that seamlessly unifies medium-voltage switchgear with smart control systems. By integrating primary components (such as circuit breakers and disconnector switches) and secondary systems (including protection relays, metering instruments, and automation devices) within a single compact enclosure, XGW-12 Ring Main Unit (RMU) delivers comprehensive distribution, control, and failsafe protection functionality.
Engineered with a space-saving footprint, this compact equipment is ideally suited for urban distribution networks, industrial parks, commercial centers, and other space-constrained environments.
Model Illustration
Outdoor fixed box-type ring main unit (Primary & secondary integrated function optional)
Rated voltage 12kV
Number of incoming circuits
Identifier for branches fitted with switchgear
Quantity of switching units on K branches
Technical parameters
| Item | Units | Parameter |
|---|---|---|
| Rated voltage | kV | 12 |
| Rated current | A | 630 |
| Power frequency withstand voltage (1min, phase-to-earth) | kV | 42 |
| Lightning impulse withstand voltage (peak, phase-to-earth) | kV | 75 |
| Rated load breaking current | A | 630 |
| Rated peak short-circuit making current | kA | 50 |
| Rated short-time withstand current | kA/4s | 20 |
| Rated peak withstand current | kA | 50 |
| Rated capacitive current breaking capacity | A | 45 |
| Rated inductive current breaking capacity | A | 16 |
| Rated full-load current breaking times | Times | >100 |
| Rated mechanical operating cycles (Open-Close) | Cycles | 2000 |
Usage conditions
Ambient Temperature: Maximum temperature +50° C: ; Minimum temperature -40° C, (Daily average must not exceed 35° C)
Relative Humidity: Daily average no more than 95%; Monthly average no more than 90%
Maximum Wind Speed: 35m/s
Pollution Severity Level: Class Ⅲ
Seismic Resistance: Intensity Grade 8
Maximum Site Gradient: Ground slope ≤3°
Installation Environment: Indoor or outdoor enclosure installation free from fire hazards, explosion risks, severe vibration, or corrosive gases. Must be sited in a well-ventilated area
Special Engineering Notes
⚠️ Altitude Derating: For installation sites exceeding 1,000 meters above sea level, the exact altitude must be specified at the time of ordering. This ensures appropriate internal gas pressure adjustment (SF6/vacuum calibration) and dielectric insulation derating during manufacturing.
🛠️ Harsh Environments: For deployment in extreme conditions-including severe coastal/industrial pollution or highly corrosive chemical atmospheres-please consult our technical support team for customized, heavy-duty coating and sealing solutions.
Comparison with Traditional RMU
product comparison
| Feature | Traditional RMU | XGW-12-RMU |
| Design Philosophy | Split/Decentralized: Separate primary switchgear cubicle and external secondary protection/CT cabinet. | Unified & Intelligent: Fully integrated, single-enclosure system with embedded smart automation. |
| Installation & Commissioning | Labor-Intensive: Requires complex, error-prone on-site wiring between CTs, switches, and protection relays. | Plug-and-Play (Factory-Assembled): Pre-tested at the factory; requires minimal on-site work (primarily main power cables and communication links). |
| Interoperability | Proprietary & Restricted: Limited compatibility due to vendor-specific protocols, often leading to vendor lock-in. | High Standardization: Uses open, standardized interfaces, allowing seamless integration with certified multi-vendor components. |
| Data & Telemetry | Siloed & Fragmented: Data inconsistencies frequently occur across disconnected primary and secondary metering devices. | Single Source of Truth: Centralized, real-time data streaming directly from the integrated intelligent terminal (DTU/FTU). |
| Maintenance & Lifecycle | High Complexity: Requires specialized on-site engineering expertise for both primary power and secondary control systems. | Predictive & Modular: Simplified maintenance featuring remote diagnostics, predictive health monitoring, and rapid modular swapping. |
Application Scenarios:
📩 Partner with Us: Contact our engineering team today to discuss your grid requirements.
01
Smart Distribution Grids
Fully compatible with advanced Distribution Automation (DA) frameworks.
02
DER Integration
Seamlessly supports Distributed Energy Resources (DERs), including solar and wind power.
03
Advanced Infrastructure
Designed for Advanced Metering Infrastructure (AMI) and modern feeder management systems.
04
Grid Modernization
Engineered for grid modernization initiatives aimed at optimizing SAIDI/SAIFI reliability indices.
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