China XGN-12 12KV Ring Main Unit - Reliable Metal Enclosed Switchgear from Top Suppliers and Factory
Model meaning
Normal service condition
- Altitude: not exceeding 2000m;
- Ambient temperature: minimum temperature -25℃, maximum temperature +40℃;
- Ambient humidity: daily average not exceeding 95%; monthly average not exceeding 90%;
- Seismic resistance: 8;
Main purpose
- The XGN□-12 modular metal enclosed ring main unit is suitable for power system with rated voltage of 12kV and rated frequency of 50Hz, and is widely used in industrial and civilian cable ring network and power supply terminal.
- The XGN □-12 modular metal enclosed ring main unit is particularly suitable for the following places: urban residential area and industrial and mining enterprise power distribution, small secondary substation, switching station, box-type substation, shopping mall, airport, subway, wind power generation, hospital, sports venue, railway, bridge, tunnel, etc.
Reference standard
Main technical parameters
| Item name | Unit | Load switch cabinet | Combination electrical cabinet | Circuit breaker cabinet |
|---|---|---|---|---|
| Rated voltage | kV | 12 | ||
| Rated frequency | Hz | 50/60 | ||
| Rated current | A | - | - | - |
| Main busbar | A | 630 | ||
| Branch busbar | A | 630 | 125 (depending on the rated current of the fuse) | 630 |
| Rated insulation level | kV | - | - | - |
| Power frequency withstand voltage (phase-phase and phase-ground) | kV | 42 | - | - |
| Power frequency withstand voltage (across isolating distance) | kV | 48 | ||
| Power frequency withstand voltage (control and auxiliary circuit) | kV | 2 | ||
| Lightning impulse withstand voltage (phase-phase and phase-ground) | kV | 75 | ||
| Lightning impulse withstand voltage (across isolating distance) | kV | 85 | ||
| Rated short-time withstand current (r.m.s) | kA | 20 | - | 25 |
| Main circuit | kA | 50 | - | 63 |
| Ground circuit | kA | 50 | 80 | 63 |
| Rated peak withstand current (peak) | kA | - | 31.5 | 25 |
| Rated short-circuit making current (peak) | A | - | 1750 | - |
| Rated short-circuit breaking current | A | 630 | - | - |
| Rated transfer current | A | 630 | - | 630 |
| Rated active load breaking current | A | 10 | - | 15 |
| Rated closed-loop breaking current | - | IP3X | ||
| Rated cable charging breaking current | Time | - | - | - |
| Protection level | - | 5000 | 5000 | 10000 |
| Mechanical life | - | 2000 | 2000 | 2000 |
| Load switch | - | - | - | - |
| Ground switch | - | - | - | - |
Frequently Asked Questions (FAQ)
What are the normal service conditions for the SF6 Load Switch and Modular Switch Cabinet?
The equipment is designed to operate under an altitude not exceeding 2000m, ambient temperatures ranging from -25℃ to +40℃, and daily average relative humidity not exceeding 95% (monthly average not exceeding 90%). The installation site should have a seismic resistance rating of 8, with no explosive or corrosive gas, and no severe vibration or impact.
What is the rated voltage and frequency of the XGN□-12 modular metal enclosed ring main unit?
The XGN□-12 modular metal enclosed ring main unit is designed for power systems operating at a rated voltage of 12kV and a rated frequency of 50Hz/60Hz.
Where is the XGN□-12 modular ring main unit typically installed?
It is widely used in industrial and civilian cable ring networks and power supply terminals. Key applications include urban residential areas, industrial and mining enterprise power distribution, small secondary substations, switching stations, box-type substations, shopping malls, airports, subways, wind power generation facilities, hospitals, sports venues, railways, bridges, and tunnels.
What standards do these switchgear units comply with?
The units comply with several national and international standards, including GB 1985-2004 for high-voltage AC disconnectors and earthing switches, GB 3804-2004 for high-voltage AC switches, GB 3906-1991 for AC metal-enclosed switchgear, and GB/T 11022-1999 for common specifications of high-voltage switchgear standards.
What is the mechanical life of the different switchgear cabinets?
According to the technical specifications, the mechanical life rating is 5000 operations for the Load switch cabinet, 5000 operations for the Combination electrical cabinet, and 10000 operations for the Circuit breaker cabinet.