HV  Disconnector Switches

     ♦ Centre Break

The centre-break disconnector have two contact arms open and close the circuit at the mid point between two insulator.

 

This is the most commonly used and cheap type of disconnector in the substation due to its design.

 

     ♦ Rated voltage: up to 550 kV

     ♦ Rated continuous current: up to 6300 A

     ♦ Rated short-time withstand current: up to 63 kA

     ♦ Double Break

The double-break disconnector have one arm moved by the central insulator supporting it and closes the circuit on two fixed contacts, each of them placed on one of the two side insulators.

 

     ♦ Rated voltage: up to 550 kV

     ♦ Rated continuous current: up to 6300 A

     ♦ Rated short-time withstand current: up to 63 kA

     ♦ Vertical Break

The vertical-break disconnector . one side connected to support and other side of contact move verticaly and open to consists of one arm which, by moving on the plane of the insulators supporting it.

   

Vertical operating mechanism makes phase-to-phase spacing is minimized. It is is good solution for mobile substations and special applications.

 

 

     ♦ Rated voltage: up to 550 kV

     ♦ Rated continuous current: up to 6300 A

     ♦ Rated short-time withstand current: up to 63 kA

     ♦ Pantograph

The pantograph disconnector have two joined half-arms and they are moving in a vertically on the plane of the insulators, close the circuit on a fixed contact connected to the upper busbar.

 

Pantograph disconnectors allow minimizing the substation area and ensure the maintenance of the bay without putting the upper busbar out of service.

 

     ♦ Rated voltage: up to 550 kV

     ♦ Rated continuous current: up to 6300 A

     ♦ Rated short-time withstand current: up to 63 kA