S3CD Double Side Break Disconnector up to 550 kV

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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