HV/MV Equipment
AC Disconnectors
(Disconnect Switches)

Grid Solutions > HV/MV Equipment > Disconnectors > AC Disconnectors > S3CD

Related Links
  Manual/Motor Mechanism
  Smart Operating Mechanism
  L-Contact
  Disconnectors Services
  Asset Management
  
S3CD
Double Side Break Disconnector up to 550 kV

The S3CD is a double side break disconnector on which the center insulator rotates to open and close the switch. It is particularly suited for applications in which low vertical clearance prohibits the use of other disconnectors. The S3CD is a rugged performer in adverse operating conditions and is always stable in the close position during short circuits.

Customer Benefits
  • High performance with proven reliability
  • Reduced phase spacing requirements
  • Built-in or retro-fitted earthing switches
  • Built-in arc restrictor available
  • Virtually maintenance free
  • Easy start-up and commissioning
  • Designed for high current performance up to 6000 A
Main Characteristics
Specifications
Drawings
  • Rugged performer in adverse conditions such as high winds and heavy ice, and is stable in the close position during short circuits
  • Particularly suited for applications in which low vertical clearance prohibits the use of other disconnectors
  • Blades are extra heavy, one piece, tubular aluminium with replaceable silver plated copper contacts at each end
  • Galvanized structural steel channel base supports the insulators and live parts, providing high strength and rigid design
  • Center insulator stack rotates on weather sealed, greaseless rotor bearings

Specifications

Technical Data (IEC)

Rated Voltage Rated Current A/ Short time current kA** BIL kV A mm B mm C mm D mm E mm
145 kV 3150/63 A 650 1800 1816 2000 150  
170 kV 3150/63 A 750 2000 2038 2200 170  
245R kV 3150/63 A 950 2400 2472 2600 220 270
245 kV 3150/63 A 1050 2800 2672 3000 220 270
300 kV 3150/63 A 1050 3200 3022 3400 220 270
362 kV 3150/63 A 1175 3800 3338 4050 270 340
420 kV 3150/63 A 1425 4200 3788 4450 270 340
550 kV 3150/63 A 1550 5000 4463 5250 270 340

Drawings

S3CD drawing
S3CD drawing