COMPASS means COMpact Prefabricated Air-insulated SubStation and includes all the high voltage functions of a single bay in just one module. They are suited both for indoor and outdoor applications.
Each phase includes:
- One circuit-breaker with BLK Drive (both single- and three phase operation)
- Two disconnectors with their own motor/manual drive
- Two earthing switches with their own motor/manual drive
- One current transformer
- One voltage transformer
- One surge arrester
- Local control cabinet
- COMPASS is available up to 170 kV rated voltage.
Customer benefits
- Fast and simple erection. Reduced costs on site
- Necessary space reduced up to 50% compared with conventional outdoor substations
- Short commissioning time of the whole substation
- The transport of the pre-fabricated bays can be conducted with ordinary vehicles
- Short cable-ways
- No foundations for bus bars necessary
- Low cost of necessary civil works
- Easy maintenance and inspection
- Low total life-cycle cost
Main features
- Thoroughly type-tested
- Bays pre-fabricated
- Bus bars pre-fabricated and self-supported
- Control and protection system based on bay-computers and digital protective relays
- Control and protection system pre-wired and pre-tested in factory before shipment
- Appropriate design of the earthing grid in order to obtain a global consistency of the substation as a whole
- Flexibility in terms of circuit-diagram as well as layout
- Mobility
- Minimum impact on the environment
Technical data
| Encapsulation | Single phase | Single phase |
| Rated voltage | 110 kV | 170 kV |
| Rated frequency | 50/60 Hz | 50/60 Hz |
| Rated power frequency withstand voltage | 275 kV | 325 kV |
| Rated current | 2000 A | 2000 A |
| Rated short time withstand current | 40 kA | 40 kA |