• SDF Series Horizontal center break disconnector
SDF Series Horizontal center break disconnector
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Model
SDF-4000/550/63
SDF-4000/420/63
SDF-4000/363/63
SDF-4000/300/63
SDF-4000/245/63
SDF-4000/145/63
SDF-4000/72.5/63
Basic info
Brand ROCKWILL
Model NO. SDF Series Horizontal center break disconnector
Rated voltage 550kV
Rated normal current 4000A
Rated short-time withstand current 63kA
Series SDF Series
Product Detail

Overview

The SDF disconnectors are available for up to 550 kV, 4000 A and 63 kA. These type of disconnector have a low friction design and offer minimized contact resistance. They are equipped with dead center interlocking for reliability in extreme conditions. Some other important features of these disconnectors are

  • No external spring in contact fingers

  • Superior design of mechanical interlock

  • Strong rotary pedestals

  • Ice breaking capacity

Applications

The horizontal center break disconnector is used at substations due to its simplicity and flexibility in arrangement.

Technology Parameters

Rated voltage (kV)

72.5

123

145

245

300

362

420

550

Rated current (A)

4000

Short time withstand current (kA)

63

Power frequency withstand voltage (kV)

against earth

140

230

275

460

395

450

520

620

across isolating distance

160

265

315

530

435

520

610

800

Lightning impulse withstand voltage (kV)

against earth

325

550

650

1050

1050

1175

1425

1550

across isolating distance

375

630

750

1200

1050

1175

1425

1550

Switching impulse withstand voltage (kV)

against earth

 

 

 

 

850

950

1050

1175

 across isolating distance

 

 

 

 

700

800

900

900

 

Know your supplier
ROCKWILL
Rockwill Electric Group Global Manufacturer of High voltage and medium-voltage power equipment and smart grid solutions. Headquartered in Wenzhou, China. Serving 100+ countries with quality, innovation, and trust. What We Offer: • HV-MV switchgear (VCB, SF₆ circuit breakers, RMU, GIS) • Distribution transformers and substations • Smart grid and monitoring systems • Solar, wind, EV charging, and energy storage solutions • EPC turnkey power projects Certified: ISO 9001 / ISO 14001 / ISO 45001
Main Categories
High Voltage Electrical Apparatus
Business Type
Design/Manufacture/Sales
Highest Annual Export (USD)
$150,000,000
Professional Experience
16 years
Workplace
108000m²m²
占位
占位
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