Product introduction
The Aierway HXGN17-12 is an advanced, compact, and fixed-type AC metal-enclosed ring main unit (RMU) designed for indoor three-phase power distribution systems. Engineered for reliable performance in modern medium-voltage networks, it provides safe switching, protection, and control functions in 12kV ring main or radial distribution applications.
Key Features
1. Robust & Compact Design
– Fixed Assembly Construction:All primary components are fixed-mounted, ensuring high mechanical stability and reduced maintenance.
– Compact Box-Type Enclosure: Space-saving footprint ideal for substations, industrial plants, and urban network installations with limited space.
– Full Metal Enclosure: Provides IP3X or higher protection against dust, moisture, and accidental contact with live parts.
2. Superior Electrical Performance
– Rated Voltage:** 12kV AC, suitable for standard medium-voltage networks.
– Flexible Current Ratings: Typically available in 630A or 1250A configurations to match various load requirements.
– High Breaking Capacity: Capable of interrupting fault currents up to 25kA or 31.5kA, ensuring network protection under fault conditions.
3. Advanced Switching & Protection
– Load Break Switches: Provide reliable load switching with visible isolation points.
– Fuse Protection:Integrated HV fuses offer cost-effective transformer and feeder protection.
Technical data table
| No. | Item | Unit | FN12-12 | FZN25-12 |
|---|---|---|---|---|
| 1 | Rated Voltage | kV | 12 | 12 |
| 2 | 1min Power Frequency Withstand Voltage | kV | Phase-to-Earth & Phase-to-Phase: 42 Isolation Gap: 48 |
Phase-to-Earth & Phase-to-Phase: 42 Isolation Gap: 48 |
| 3 | Lightning Impulse Withstand Voltage (Peak) | kV | Phase-to-Earth & Phase-to-Phase: 75 Isolation Gap: 85 |
Phase-to-Earth & Phase-to-Phase: 75 Isolation Gap: 85 |
| 4 | Rated Frequency | Hz | 50 | 50 |
| 5 | Rated Current | A | 630 | 630 |
| 6 | Electrical Life at Rated Current | Times | ≥ 100 | ≥ 100 |
| 7 | No-Load Transformer Breaking Capacity | kVA | 1250 | 1250 |
| 8 | Rated Thermal Withstand Current | kA/S | 20/4 Earthing Switch: 20/2 |
20/4 Earthing Switch: 20/2 |
| 9 | Rated Dynamic Withstand Current (Peak) | kA | 50 | 50 |
| 10 | Rated Short-Circuit Making Current (Peak) | kA | 50 | 50 |
| 11 | Fuse Rated Current | A | 125 | 125 |
| 12 | Rated Transfer Current | A | 870 | 870 |
| 13 | Rated Short-Circuit Breaking Current | kA | 20 | 20 |
| 14 | Matching Fuse Model | – | S□LAJ-12 | S□LAJ-12 |
| 15 | Mechanical Life | Times | 2000 | 10000 |
| 16 | Auxiliary Circuit 1min Power Frequency Withstand Voltage | kV | 2 | 2 |
| 17 | Motor Operating Mechanism Working Voltage | V | AC/DC 220; 110 | AC/DC 220; 110 |
| 18 | Protection Degree | – | IP2X | IP2X |
Outline and dimensions of installation
