KNEE TYPE DISCONNECTORS

The horizontal break knee type disconnector consists of three poles. Each pole consists of a base, one rotating insulator and two support insulators on which the main blade is mounted.

knee type disconnector
Product Highlights
The base is made of steel plates on which the insulators are mounted. The individual bases are connected by means of a tie rod.
The main blade is made of two aluminum tubes with a hinge in the middle and has silver-plated copper contacts at the jaw end. During closing of the Disconnector, the main blade makes a horizontal stretching movement. Full contact pressure of the main contacts achieved by full stretching of the main blade.
The main contacts are of the “reverse-loop” design, which makes them suitable for very high short circuit currents. All contact fingers are made of silver-plated copper and are equipped with stainless steel springs to ensure reliable contact pressure.

Technical Data

TECHNICAL DATA – Knee Type Disconnector

 

245

300

362

420

550

800

LIGHTNING IMPULSE WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

1050
1200

 

1050
1050
+170

 

1175
1175
+205

 

1425
1425
+240

 

1550
1550
+315

 

2100
2100
+455

POWER FREQUENCY WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

460
530

 

460
530

 

460
530

 

520
610

 

620
800

 

830
1150

SWITCHING IMPULSE WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

-
-

 

850
700
+245

 

950
800
+295

 

1050
900
+345

 

1175
900
+450

 

1425
1100
+650

CURRENT AND SHORT CIRCUIT RATINGS

UP TO 4000A, STC 50kA - 125 kAp

Drawings

knee type disconnector

Applications
  • URL support: a hash id in the URL can select a tab
  • Bookmark support: select a tab via bookmark anchor
  • Select tabs by mouse over
  • Auto advance
  • Smooth transitional effect
  • Content can retrieved from other documents or pages through Ajax
  • ... and more