S2DA
S2DA Center break disconnector up to 550 kV
The S2DA is reliable in high winds and heavy ice and always stable in the closed position during short circuits. A galvanised structural steel channel base supports the insulators and live parts, assuring a high strength, rigid design. The two insulator stacks rotate on weather-sealed, greaseless, maintenance-free rotor bearings and the blades are made of extra-heavy extruded aluminium with replaceable silver-plated copper contacts in the opening point.
- High short circuit carrying capacity
- No sliding contacts
- Low operating torque
- Built-in or retro-fitted earthing switches
- Arc restrictors for line charging and transformer magnetising currents
- Virtually maintenance free
- Easy start-up and commissioning
S2DA
S2DA Center break disconnector up to 550 kV
The S2DA is reliable in high winds and heavy ice and always stable in the closed position during short circuits. A galvanised structural steel channel base supports the insulators and live parts, assuring a high strength, rigid design. The two insulator stacks rotate on weather-sealed, greaseless, maintenance-free rotor bearings and the blades are made of extra-heavy extruded aluminium with replaceable silver-plated copper contacts in the opening point.
- High short circuit carrying capacity
- No sliding contacts
- Low operating torque
- Built-in or retro-fitted earthing switches
- Arc restrictors for line charging and transformer magnetising currents
- Virtually maintenance free
- Easy start-up and commissioning
- Rated voltage from 72,5 to 550kV
- Reliable in adverse operating conditions such as high winds and heavy ice
- Always stable in the close position during short circuits
- Flex technology for inspection free, long term operation (no need for sliding or rotary contacts)
- Supplied or easily retro-fitted with 1 or 2 earthing switches
- Customised solutions available: parallel, in-line, diagonal, vertical, underhung, phase-to-phase
Specifications
Technical Data (IEC)
| Rated Voltage | Rated Current A/ Short time current kA | BIL kV | A mm | B mm | C mm | ExF mm |
| 72.5 kV | 3,150/63 | 325 | 1,000 | 960 | 770 | 150 |
| 100 kV | 4,000/63 | 420 | 1,400 | 1,240 | 1,020 | 210 |
| 123 kV | 4,000/63 | 550 | 1,400 | 1,440 | 1,220 | 210 |
| 145 kV | 4,000/63 | 650 | 1,600 | 1,720 | 1,500 | 210 |
| 170 kV | 4,000/63 | 750 | 1,900 | 1,920 | 1,700 | 210 |
| 245R kV | 4,000/63 | 950 | 2,500 | 2,375 | 2,100 | 300x150 |
| 245 kV | 4,000/63 | 1,050 | 2,500 | 2,575 | 2,300 | 300x150 |
| 300 kV | 4,000/63 | 1,050, | 3,000 | 2,925 | 2,650 | 300x150 |
| 362 kV | 4,000/63 | 1,175 | 3,500 | 3,300 | ,2,900 | 270x270 |
| 420 kV | 4,000/63 | 1,425 | 4,200 | 3,750 | 3,350 | 270x270 |
| 550kV | 4,000/63 | 1,550 | 4,700 | 4,400 | 4,000 | 270x270 |
Drawings
