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AC Disconnectors
(Disconnect Switches)

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S2DA
Double Side 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.


Customer Benefits
  • 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
Main Characteristics
Specifications
Drawings
  • 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

S2DA drawing S2DA drawing