PANTOGRAPH DISCONNECTORS

The Pantograph Disconnectors are single break and vertical reach type Disconnectors mounted on a post insulator operated through a operating rod insulator. The divided support Disconnectors are mounted directly on the structure. These types of Disconnectors permit the design of modern switchgear installations with minimum-space requirement. An attractive simple design and high reliability are the main advantage of S&S Disconnectors
pantograph
Product Highlights
The pantograph mechanism is installed on the support insulator and transfers the movement of the operating rod insulator to the arms of the Pantograph Disconnector. The mechanism is housed in an Aluminium enclosure, protecting it from pollution and ice. The springs that compensate the weight of the pantograph arms are also installed inside the housing.
Each Pantograph is equipped with four aluminum arms to ensure a rigid construction with a very high short circuit rating. The main contact arms are made of Aluminium with copper contacts of silver plated surface. The counter contact is a horizontal copper bar, silver plated, which is hung to the bus bar system. The current transfer takes place from the trapeze to the bottom aluminum housing through four arms and number of silver plated bronze ball contacts that are housed in grease packed bronze housing. Disc springs are provided to maintain the contact pressure on the bronze balls against the bronze castings.
The Pantograph Disconnectors are equipped with the dead centre mechanism that ensures the locking of Disconnector in both close and open position in case of extreme external forces such as wind force, short circuit force, seismic force etc.

Technical Data

TECHNICAL DATA – Pantograph Disconnector

 

36

72.5

123

145

170

245

300

362

420

LIGHTNING IMPULSE WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

170
195

 

325
375

 

550
630

 

650
750

 

750
860

 

1050
1200

 

1050
1050
+170

 

1175
1175
+205

 

1425
1425
+240

POWER FREQUENCY WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

70
80

 

140
160

 

230
265

 

275
315

 

325
375

 

460
530

 

460
530

 

460
530

 

520
610

SWITCHING IMPULSE WITHSTAND VOLTAGE

  • TO EARTH
  • ACROSS ISOLATING DISTANCE

 

kV
kV

 

-
-

 

-
-

 

-
-

 

-
-

 

-
-

 

-
-

 

850
700
+245

 

950
800
+295

 

1050
900
+345

CURRENT AND SHORT CIRCUIT RATINGS

UP TO 4000A, STC 50kA - 125 kAp

 

Drawings

pantograph disconnector

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