S2DA Center break disconnector up to 550 kV

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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.

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