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. |
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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 |
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|
245 |
300 |
362 |
420 |
550 |
800 |
|
LIGHTNING IMPULSE WITHSTAND VOLTAGE
|
kV |
1050 |
1050 |
1175 |
1425 |
1550 |
2100 |
POWER FREQUENCY WITHSTAND VOLTAGE
|
kV |
460 |
460 |
460 |
520 |
620 |
830 |
SWITCHING IMPULSE WITHSTAND VOLTAGE
|
kV |
- |
850 |
950 |
1050 |
1175 |
1425 |
CURRENT AND SHORT CIRCUIT RATINGS |
UP TO 4000A, STC 50kA - 125 kAp |
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