GIS 110 kV
Gas insulated SF6 switchgear ZFW_-126 - is a unique technological unit made of standard functional modules: circuit-breaker, busbar/disconnector/earthing disconnector/, line disconnector/earthing disconnector/, fast earthing switch, current transformers, potential transformers, surge arresters, air/cable input etc, as well as control and monitoring systems.
Compared to traditional GIS, our GIS ZFW_-126 have combined three-position switch disconnector-earthing switch. It provides reliable interlock between disconnector and earthing switch to significantly increase reliability of operation.
It shall be used in 110kV, 50Hz grid at power generating stations and distribution substations.
ZFW_-126 complies with national and international standards GB/T11022, IEC 62271-203.
| Parameter | Unit | Indoors | Outdoors | |
|---|---|---|---|---|
| Ambient temperature | °C | -25…+40 | -30…+40 | |
| Altitude | M | 1000 (2000*,3000*) | ||
| Humidity | daily average ≤ 95% | Condensation and rain | ||
| Degree of pollution | class | III (25 мм/кВ), IV (31 мм/кВ) | ||
| Maximum wind speed | m/s | / | 34 | |
| Seismic impact | Acceleration level ≤0.4g, Vertical acceleration ≤0.2g | |||
| Sun impact | W/m2 | / | ≤1000 | |
| Ice thickness | mm | / | ≤20 | |
*Note: if any special operating conditions requirements please contact the manufacturer
Technical characteristics
| Characteristics | Unit | Value | |
|---|---|---|---|
| Rated voltage | kV | 126 | |
| Rated frequency | Hz | 50 or 60 | |
| Rated current | A | 630,1250,1600, 2000, 2500, 3150 | |
| Main busbar | A | 630,1250,1600, 2000, 2500, 3150 | |
| Maximum short time allowable current | kA | 31,5; 40 | |
| Rated short circuit duration | s | Main circuit: 4; earthing circuit: 2 | |
| Rated peak breaking current | kA | 80; 100 | |
| Rated insulation level | Rated short time allowable voltage | kV |
To earth: 230/265; between opened contacts: 230+73* |
| Rated lightning impulse withstand voltage | kV |
To earth, phase-to phase: 550/650; between contacts: 550+103 |
|
| SF6 pressure (relative, at 20°C),rated/maximum/blocking | mPa |
automatic circuit-breaker unit: 0.6/0.55/0.5 other units 0.5/0.45/0,4 |
|
| 5-min alolowable voltage with 0 relative pressure of SF6 | kV | 95 | |
| Annual SF6 leakage | % | ≤0.5 | |
| Rated voltage of control scheme | V | DC 220 or AC 220 | |
*Note: if any special conditions of operation please contact the manufacturer.
CB- automatic circuit-breaker; CT-current transformer; BSG- input-output insulator; BUS-DS-ES - busbar/disconnector/earthing switch; DC-ES-FES - disconnector/earthing switch/fast earthing switch; LCP - local control panel
All the GIS components are independent. It is possible to combine different modules to make a GIS in accordance with the following schemes:
- SS with single sectionised system of busbars.
- SS with double busbar system.
- Bay of air input/output with single busbar system.
- Bay of bus connecting circuit-breaker.
- Bay of metering PT with SA.
- Bay with double busbar system of air input/output.
- Bay of cable input/output with double busbar system.
