Medium voltage switchgear (MV) type Rotoblok SF
The subject of this document is a Rotoblok SF type state-of-the-art, indoor medium voltage switchgear intended for distribution of three-phase alternating current with a frequency of 50 Hz, at a rated voltage up to 25 kV, in industrial and commercial power sector distribution grids. The switchgears are configured from standard single modules with varied equipment. The information and technical data specified herein enable the designer to assemble a switchgear from typical modules. In case modules with equipment not specified herein or with changed dimensions are needed, the scope of equipment should be arranged with the manufacturer.
Czytaj wiecej >Description:
Certified by the Electrotechnical Institute.
| Basic electrical data: | |
| Rotoblok SF | |
| Rated network voltage | 20 kV |
| Highest device voltage | 25 kV |
| Rated frequency / number of phases | 50 Hz / 3 |
| Rated short-time network frequency withstand voltage | 50 kV / 60 kV |
| Rated withstand lightning surge voltage 1.2/50 μs | 125 kV / 145 kV |
| Continuous rated current | 630 A |
| Rated short-time withstand current | 20 kA (1s) |
| Rated peak withstand current | 50 kA |
| Resistance to internal arc effects | 16 kA (1s) |
| IP protection rating | IP4X |
| Service conditions: | |
| Ambient temperature | |
|
- peak short-time
|
+ 40°C |
|
- highest day average
|
+ 35°C |
|
- highest annual average
|
+ 20°C |
|
- lowest long-term
|
+ 25°C1) |
| Relative humidity of air | |
|
- highest day average
|
95% |
|
- highest month average
|
90% |
|
- highest day average vapour pressure
|
2,2 kPa |
|
- highest month average vapour pressure
|
1,8 kPa |
| Atmosphere at the place of installation | no significant contamination with salt, vapour, dust, smoke, flammable or corrosive gasses and lack of icing, frosting and dewing |
| Installation altitude | up to 1000 m asl2) |
| Vibrations | vibrations caused by external factors or earthquakes negligible |
Note:
*1) Unless the manufacturer of instrumentation & control and protection devices has specified otherwise.
*2) If the switchgear installation altitude is higher than 1000 m ASL the switchgear insulation level should corrected by an indicator in accordance with the guidelines of item 2.2.1 of the PN-EN 62271-1 standard.
| Rated power of transformers that can be connected and disconnected using GTR SF 2V, GTR SF 2VM switch disconnectors, depending on voltages on the MV side: | ||
| Rated network voltage | Rated current | Max. transformer power |
| 6 kV | 77 A | 800 kVA |
| 10 kV | 57,7 A | 1000 kVA |
| 15 kV | 61,6 A | 1600 kVA |
| 20 kV | 57,7 A | 2000 kVA |
In Rotoblok SF type switchgear typical fuse links are used acc. to the IEC 282-1, DIN 43625 standard, with thermal protection.
Switching devices
- GTR SF 1 - switch disconnector with earthing switch,
- GTR SF 1M - switch disconnector with earthing switch and motor drive,
- GTR SF 2V - fused switch disconnector with earthing switch,
- GTR SF 2VM - fused switch disconnector with earthing switch and motor drive,
- GTR SF 4 - disconnector with earthing switch,
- VCB GIS circuit breaker with disconnector and earthing switch.
The subject of this document is a Rotoblok SF type state-of-the-art, indoor medium voltage switchgear intended for distribution of three-phase alternating current with a frequency of 50 Hz, at a rated voltage up to 25 kV, in industrial and commercial power sector distribution grids. The switchgears are configured from standard single modules with varied equipment. The information and technical data specified herein enable the designer to assemble a switchgear from typical modules. In case modules with equipment not specified herein or with changed dimensions are needed, the scope of equipment should be arranged with the manufacturer.