Medium voltage switchgear (MV) type Rotoblok
The subject of this document is a ROTOBLOK 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 24 kV, in industrial and commercial power sector distribution grids. The switchgears are configured from standard single bays with varied equipment. The information and technical data specified herein enable the designer to assemble a switchgear from typical modules. In case bays with equipment not specified herein or with changed dimensions are needed, the scope of equipment should be arranged with the manufacturer.
Czytaj wiecej >Description:
The switchgear is certified by the Electrotechnical Institute.
| Electrical data: | ||
| Rotoblok 17,5kV | Rotoblok 24 | |
| Rated network voltage | 15 kV | 20 kV |
| Highest device voltage | 17,5 kV | 24 kV |
| Rated frequency / number of phases | 50 Hz / 3 | |
| Rated short-time network frequency withstand voltage |
55 kV / 63 kV | 50 kV / 60 kV |
| Rated withstand lightning surge voltage 1,2/50 μs | 95 kV / 110 kV | 125 kV / 145 kV |
| Continuous rated current | 630 A / 1250 A | 630 A - 1250 A |
| Rated short-time withstand current | 16 kA (1s) | 16 kA (1s) |
| Rated peak withstand current | 40 kA | 40 kA |
| IAC internal arc resistance classification | AF up to 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 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 2V disconnectors, depending on voltages on the MV side: | ||
| Rated network voltage | Rated current | Max. transformer power |
| 6 kV | 60,6 A | 630 kVA |
| 10 kV | 57,7 A | 1000 kVA |
| 15 kV | 48,1 A | 1250 kVA |
| 20 kV | 46,2 A | 1600 kVA |
In case of transformers with higher powers please contact the switchgear manufacturer.
In Rotoblok type switchgear typical fuse links are used acc. to the IEC 282-1, DIN 43625 standard, with thermal protection.
The subject of this document is a ROTOBLOK 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 24 kV, in industrial and commercial power sector distribution grids. The switchgears are configured from standard single bays with varied equipment. The information and technical data specified herein enable the designer to assemble a switchgear from typical modules. In case bays with equipment not specified herein or with changed dimensions are needed, the scope of equipment should be arranged with the manufacturer.