Summary
XGN(W)74-12 Series metal enclosed comapct switchgear unit module. Each unit has its independent function. It can be extendible to each side, and supplied in different configurations suitable for actually requirement.
XGN(W)74-12 Series metal enclosed compact switchgear is completely SF6 system with a stainless steel tank containing Main Switch(LBS or VCB), Earthing Switch, Fuse insulation and busbar. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
XGN(W)74-12 Series metal enclosed compact switchgear, Main Switch is SF6 Load Break Switch(VCB). The switchgear have different merits due to its clear configurations, flexibility, safety interlock, extendible. The switchgear suitable for rated frequency 50/60Hz, rated voltage 12kV distribution network. It is designed for use in the following applications: compact secondary substations, small industries, wind power plants, hotel, shopping centers, office buildings, business centers, lighting mining applications, airport, hospitals, tunnels and underground railway etc. IEC62271-201 & IEC62271-304.
Ambient condition
- Ambient temperature: +40℃ ~-25 ℃；
- Wind speed:≦ 34m/s ；
- Altitude: ≦1000m；
- Earthquake intensity: 8 degree;
- Ambient temperature: Monthly average 90%;daily average 95% ;
- Applicable occasions should free from inflammables, explosives corrosives and servere vibration;
- Pollution degree:IV
Model
Technical specification
| No. | Item | Unit | Data | ||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated frequency | Hz | 50 | ||
| 3 | Rated current(LBS/ Combination Apparatus) | A | 630/100 | ||
| 4 | 1min P.F withstand voltage | Phase to phase, Phase to earth | kV | 42 | |
| Disconnect gap | 49 | ||||
| 5 | Lightning impulse withstand voltage | Phase to phase, Phase to earth | kV | 75 | |
| Between gaps | 85 | ||||
| 6 | Rated short-time withstand current | LBS 4s | kA | 20 | |
| ES 2s | |||||
| 7 | Rated peak withstand current | LBS | kA | 50 | |
| ES | |||||
| Earthing connection circuit | 40 | ||||
| 8 | Rated short-circuit making current(peak) | LBS | kA | 50 | Making 3 times |
| ES | Making 2 times | ||||
| 9 | LBS rated active load breaking current | A | 630 | Breaking 100 times | |
| 10 | LBS rated closing ring breaking current | 630 | Breaking 20 times | ||
| 11 | LBS 5% rated active load breaking current | 31.5 | Breaking 20 times | ||
| 12 | LBS rated cable charging breaking current. | 10 | Breaking 10 times | ||
| 13 | Combination Apparatus rated short circuit breaking current | kA | 31.5 | ||
| 14 | Combination Apparatus rated transfer current. | A | 1500 | ||
| 15 | Rated line charging breaking current | 1 | Breaking 10 times | ||
| 16 | Earthing fault current breaking | 30 | Breaking 10 times | ||
| 17 | Line and cable charging current breaking under earthing fault condition | 17.3 | Breaking 10 times | ||
| 18 | Mechanical life | LBS | Times | 5000 | |
| ES | 2000 | ||||
| 19 | SF6 Gas rated press(20℃, Gage pressure) | MPa | 0.03 | ||
| 20 | SF6 Gas leakage ratio | Annual | ≦1% | ||
| 21 | Opening, Closing devices and auxiliary circuit rated voltage (Ua) | V | DC110, DC220, AC220 | ||
| 22 | Operating mechanism | Spring (Manual/Motor) | |||
| 23 | Outline dimension(WxDxH) | mm | 1740×1100×1600 | ||
| 24 | Gross weight | kg | 1100 | ||
General configuration
XGN(W)74-12 series consisting of bottom compartment, gas compartment, operating mechanism, interlock mechanism and LV control compartment. Each compartment disconnected by copper plate. Gas compartment have pressure release device. Lower compartment have pressure release guide in order to avoid accident. Degree of protection is IP3X.
Bottom Compartment
Gas Compartment
Load Break Switch
Operating mechanism
Fuse
Drawing 1 Compartment and main element equipment installation location in gas box
XGW74-12 Outdoor Ring Main Unit Structure Drawing