Compact SF6 switchgear 6 (10) kV
SF6 switchgear XGN74-12 has modular design of standard type with universal extension and modernization possibilities. XGN74-12 is suitable for all types of distribution substations. This switchgear has compact design, safe, reliable and long time operation without technical maintenance, with possibility of extension by connection of single modules.
Normal operating conditions:
- Altitude ≤2500m.
- Ambient temperature:
- maximum ambient temperature +40°С;
- minimum ambient temperature -25°С.
- Humidity : maximum daily average ≤95% maximum monthly average ≤90%;
- Earthquake resistance ≤8.
Technical characteristics
| SF6 pressure | Bar | Rated pressure 0.4 at 20°С | ||
| Annual SF6 leakage | % | ≤0.5 | ||
| Water immersion test | Bar | 0.3 pressure is applied for 24h | ||
| Dialectric arc breakdown test | kA/s | 20/1 (with arc extinguisher),16/1 (without arc extinguish) | ||
| Degree of protection | SF6 compartment | IP67 | ||
| tube of fuse | IP67 | |||
| Cross section of busbar, material | Busbar in distribution compartment | mm2 | 400, copper | |
| Earthing busbar | mm2 | 160, copper | ||
| Stainless steel enclosure thickness | mm | 2.5 | ||
Rated parameters
| Name | Unit | Module С | Module F | Module V | Module CB | |
|---|---|---|---|---|---|---|
| Load switch | Comb. apparatus | Vacuum CB | Insulating/earthing switch | Vacuum CB | ||
| Rated voltage | kV | 12 | 12 | 12 | 12 | 12 |
| PF withstand voltage |
kV |
42 | 42 | 42 | 42 | 42 |
| Lightning impulse withstand voltage |
kV |
75 | 75 | 75 | 75 | 75 |
| Rated current | A | 630 | Note. 1 | 630 | 1250 | |
| Rated current of transfer current | A | 1700 | ||||
| Breaking current of closed cycle | A | 630 | ||||
| Breaking current of cable charge | A | 135 | ||||
| Breaking current of active load with 5% capacity | A | 31.5 | ||||
| Earth fault breaking current | A | 200 | ||||
| Breaking current of cable charge during earth fault | A | 115 | ||||
| Short circuit breaking current | kA | Note. 2 | 20 | 20 | ||
| Short circuit current capacity (peak) |
kA |
50 | Note. 2 | 50 | 50 | 50 |
| Short time withstand testing current ЗN,2s |
kA |
20 | ||||
| Short time withstand current, 4s |
kA |
20 | 20 | 20 | 20 | |
| Electrodynamic withstand current |
kA |
50 | 50 | |||
| Mechanical life (C-O) | times | 5000 | 5000 | 5000 | 2000 | 10000 |
Note 1: depends of rated current of fuse
Note 2: limited by high voltage fuse
Overall dimensions drawing of XGN74-12
| Quantity of panels in module | Width of module A, mm |
|---|---|
| 1 | 371 |
| 2 | 696 |
| 3 | 1021 |
| 4 | 1346 |
| 5 | 1671 |
There are 18 standard combinations of XGN74-12 modules.
The conditions of guarantee
Warranty and service maintenance is provided by "AES-komplekt". Warranty period for equipment is 5 years. It is possible to extend warranty obligations subject to separate agreement.