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 

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.