C-GIS (S-GIS / D-GIS) — cubicle type SF6 gas insulated medium voltage switchgear
C-GIS is cubicle type medium voltage SF6 gas insulated switchgear of the 25.8 kV class with one (S-GIS) or two (D-GIS) busbar systems. Main busbar current up to 2000 A, withstand up to 25 kA for 1 s. Intended for distribution substations and power plant switchyards with limited space and a need for fast automatic transfer.
- Rated current
- main busbars and incomer 2000 A; branch 600 A
- Short-time withstand current
- 25 kA (D-GIS) / 16 kA (S-GIS), 1 s
- Making capacity
- 65 / 41.6 kA
- Insulation
- 70 kV (77 kV across the disconnector); impulse 165 kV
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The cubicle SF6 gas insulated switchgear C-GIS (Cubicle Type SF6 Gas Insulated Switchgear) is produced by the Korean manufacturer in two arrangements. D-GIS with two busbar systems is equipped with a main panel, an auxiliary transformer panel, feeder panels, a bus tie panel and a sectionalizing panel. S-GIS with one busbar system is assembled from the automatic load transfer panel ALTS, a main panel, a MOF metering panel, a VT panel and feeder panels. Typical installation sites are 22.9 kV distribution substations, power plant switchyards, critical consumers with automatic transfer and sites with limited area.
The design is fully metal-enclosed. All live parts are assembled in the cubicle tank filled with SF6 at a gauge pressure of 0.03 MPa at 20 °C. The gas level is monitored, and a relief device is provided for an emergency pressure rise. The circuit breaker has a drive on a permanent magnet actuator that works without maintenance. The disconnector and the earthing switch have a spring toggle mechanism, with mechanical interlocks between the three devices and double protection of personnel during maintenance. The declared service life is 10,000 operations. The sealed tank isolates the live parts from the dust and humidity of the room, so the condition of the insulation does not depend on them.
The ALTS function transfers the load to the backup source 1 cycle after voltage is lost at the main incomer, so the supply interruption is minimal. Both voltage loss and restoration are monitored. Rated current of the main busbars and incomers is 2000 A, of the branches 600 A, frequency 50/60 Hz. The one-minute test voltage is 70 kV, across the open disconnector 77 kV, lightning impulse 165 kV. Short-time withstand current is 25 kA for D-GIS and 16 kA for S-GIS for 1 s, making capacity 65 and 41.6 kA respectively.
Control is manual and automatic, auxiliary supply 220 V AC or 125 or 24 V DC. Operating temperatures are from −30 to +40 °C. The switchgear is normally equipped with the microprocessor controller ETR500 with measurement, monitoring, event recording and communication, and protection relays of other makers can be installed at the customer's request. The 25.8 kV voltage class is taken from the manufacturer's Korean catalog. Type tests were carried out in the accredited laboratory KERI to IEC 62271-101, 102, 200 and 201.
Technical specifications
| Rated current | main busbars and incomer 2000 A; branch 600 A |
|---|---|
| Short-time withstand current | 25 kA (D-GIS) / 16 kA (S-GIS), 1 s |
| Making capacity | 65 / 41.6 kA |
| Insulation | 70 kV (77 kV across the disconnector); impulse 165 kV |
| SF6 pressure | 0.03 MPa gauge at 20 °C |
| Service life | 10,000 operations |
| ALTS | transfer in 1 cycle |
| Temperature | −30…+40 °C |
| Standards | IEC 62271-101, -102, -200, -201 |
Request a price and lead time
C-GIS (S-GIS / D-GIS) — cubicle type SF6 gas insulated medium voltage switchgear. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 20 91 00 |
|---|---|
| HS, 6 digits | 8537 20 |
| CN (EU) | 8537 20 91 |
| HTSUS (USA) | 8537 20 00 00 |
| China customs tariff | 8537 20 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How does S-GIS differ from D-GIS?
D-GIS has two busbar systems, withstand current 25 kA for 1 s and making capacity 65 kA. S-GIS with one busbar system is rated for 16 and 41.6 kA and has an ALTS panel for transfer to the backup source.
Which voltage class is the C-GIS switchgear rated for?
The voltage class is 25.8 kV, with typical use in 22.9 kV networks. Power frequency test voltage is 70 kV, impulse up to 165 kV.
To which standards was C-GIS tested?
Type tests were carried out in the KERI laboratory to IEC 62271-101, 102, 200 and 201. Service life of the devices is 10,000 operations.
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