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S2DA Double Side break disconnector Contact Sales
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