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Introduction
TheHXGN17-12 Ring Main Unit (RMU)is a compact, high-performancemedium voltage switchgeardesigned for use inpowerdistributionsystemsup to12kV. It provides a reliable,fully insulated, andfully enclosedswitching solution, ensuringsafe and efficient operationinindustrial, commercial, and utility applications.
ThisRMUis widely used in urban and rural power grids, industrial plants, commercial centers, railways, substations, and infrastructure projects wherecontinuous power supply and compact designare essential.
Key Features
- Compact & Modular Design: Small footprint, making it ideal for urban substations and space-constrained installations.
- High Reliability: Fully insulated, fully enclosed structure, and maintenance-free operation.
- Enhanced Safety: Arc-resistant design withvacuum load switchtechnology to improve operational safety.
- Flexible Configurations: Can be configured forring network or radial power distribution.
- Long Electrical Life: Designed forhigh operational endurance, ensuring long-term performance with minimal maintenance.
Working Conditions
To ensure the best performance and longevity, theHXGN17-12 RMUis designed to operate under the following environmental conditions:
| Parameter | Specification |
|---|---|
| Ambient Temperature | -25°C to +40°C |
| Altitude | ≤ 1000m |
| Relative Humidity | Daily avg. ≤ 95%, Monthly avg. ≤ 90% |
| Seismic Resistance | Up to Magnitude 8 |
| Environmental Conditions | No fire, explosion risk, corrosive gas, or heavy pollution |
Technical Specifications
General Electrical Specifications
| Parameter | Unit | FN12-12 | FZN25-12 |
|---|---|---|---|
| Rated Voltage | kV | 12 | 12 |
| 1-Min Frequency Withstand Voltage | kV | 42 (to ground), 48 (isolation breaks) | 42 (to ground), 48 (isolation breaks) |
| Lightning Impulse Voltage (Peak) | kV | 75 (to ground), 85 (isolation breaks) | 75 (to ground), 85 (isolation breaks) |
| Rated Frequency | Hz | 50 | 50 |
| Rated Current | A | 630 | 630 |
| Electrical Life at Rated Current | Cycles | ≥100 | ≥100 |
| Open No-Load Transformer Capacity | kVA | 1250 | 1250 |
| Rated Stabilizer | kA/S | 20/4, Earth Switch 20/2 | 20/4, Earth Switch 20/2 |
| Rated Dynamic Stabilizing Current (Peak) | kA | 50 | 50 |
| Rated Short Circuit Closing Current (Peak) | kA | 50 | 50 |
| Fuse Rated Current | A | 125 | 125 |
| Rated Transfer Current | A | 870 | 870 |
| Rated Short-Circuit Opening Current | kA | 20 | 20 |
| Matching Fuse Type | – | S□LAJ-12 | S□LAJ-12 |
| Mechanical Life | Cycles | 2000 | 10000 |
| Auxiliary Circuit 1-min Frequency Withstand Voltage | kV | 2 | 2 |
| Electric Actuator Working Voltage | V | AC/DC 220, 110 | AC/DC 220, 110 |
| Protection Grade | – | IP2X | IP2X |
Installation & Mounting Dimensions
Standard Dimensions (mm)
| W | D | H |
|---|---|---|
| 600 | 900 | 2000 |
| 650 | 900 | 2000 |
| 700 | 900 | 2000 |
| 800 | 900 | 2000 |
Installation Diagram & Components
TheHXGN17-12 RMUconsists of variousfunctional compartmentsand key components:
- Instrument Door: Houses control instruments and metering units.
- Instrumentation: Includes meters and protective relays.
- DXN Display: Displays operational status.
- Nameplate: Identification label with product details.
- Operating Mechanism: Switchgear control section.
- Lower Door: Provides access for maintenance.
- Analog Plate: Displays schematic representation.
- Door Lock: Enhances security.
- Load Switch: Vacuum switch mechanism.
- Center Divider: Structural reinforcement.
- Skeleton: Structural frame.
- Current Transformer: Measures current flow.
- Cable Holder: Supports cable routing.
- Relay Compartment: Houses protective relay units.
Ordering Information
When placing an order for theHXGN17-12 Ring Main Unit, the followingtechnical data should be provided:
- Main Wiring Scheme Number: Define purpose and system diagram.
- Rated Voltage & Current: Specify the operational voltage.
- Short Circuit Breaking Capacity: Required fault-handling capability.
- Room Layout Plan: Space arrangement details.
- Protection & Control Requirements: Include schematic diagrams.
- Environmental Considerations: For special conditions.
- Custom Requirements: Any additional configurations.
Applications of HXGN17-12 Ring Main Unit
TheHXGN17-12 RMUis ideal formedium-voltage power distribution networksand provides asafe and efficient solutionin:
- Urban & Rural Power Distribution: Used in industrial and commercial electrical networks.
- Renewable Energy Projects: Suitable forsolar and wind power stations.
- Underground & Indoor Substations: Compact and enclosed for confined spaces.
- Railway & Metro Networks: Used intrain stations and underground metro networks.
- Industrial Plants & Mining: Essential forfactories, refineries, and mining operations.
Advantages of HXGN17-12 RMU
- Compact Design– Small footprint,saving installation space.
- Fully Insulated & Sealed– No exposure to dust, moisture, or pollutants.
- Low Maintenance–Minimal servicing requiredover its lifetime.
- Fast & Easy Installation– Preassembled units ensurequick deployment.
- Long Lifespan–Durable materialsfor extended operational life.
- Safe & Reliable– Built-inarc-proofandfault-handling mechanisms.
- Customizable Configurations– Adaptable forvarious network requirements.
TheHXGN17-12 Ring Main Unit (RMU)is astate-of-the-art medium voltage switchgear solutiondesigned formodern power distribution networks. It offersreliable performance, compact design, and enhanced safety features, making it anideal choiceforutility providers, industrial facilities, and renewable energy projects.
With itsversatile configurations, robustvacuum load switch technology, andfully insulated enclosure, theHXGN17-12 RMUdeliversexceptional efficiencyandlong-term reliabilityinmedium voltage power distribution applications.
