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Load Break Switch SF6 Insulted

load break switch SF6 insulated.png

The AIR24 series switchboards are used in the distribution system having a rated voltage up to 24 kV. They consist of a standardized modular and compact series of protected panels, equipped with air-operated and rotary on-load and rotary off-load switches (TGA and TGN series) and SF6 or vacuum circuit breakers. The range of standard panels available allows to realize all typical arrangements of medium voltage distribution system class 12 kV and 24 kV.

The advantages of TGA Type SF6 switch disconnector may be summarized as follows:

  • long working life due to high reliability of the apparatus and due to almost no wear.

  • working safet.


          The arc quenching occurs inside the rotating body containing SF6 gas. During the opening operation the arching moving contacts, fitted inside the rotary block, plug-out the arching fix contacts cutting the circuit, while both the upper and the lower air insulated main contacts still remain coupled.

       During the finishing operation, when the arc is already quenched, the main contacts disjoin themselves and the rotating body through a rotation of 90 degrees reaches the open position with the three bushing connected to the ground.


* Rated voltage: 12-24 kV:  12-24 kV

* Lightning impulse test voltage: 125 kV

* Rated Current:   400-630 A

* Rated Short-times current:   12-20 kA

* Peak withstand rated current: 40-50 kA

* Rated frequency: 50hz


metal enclosed switchgear?

Metal-enclosed switchgear is defined in ANSI C37. ... This essentially describes non-compartmentalized metal-enclosed single or multiple fused or non-fused load interrupters such as Eaton's type WLI.

Can metal clad switchgear be considered as metal enclosed?

Since metal clad switchgear (IEEE C37. 20.2) is technically a subset of metal enclosed, it shares many of the same external properties. It is enclosed in a metal shell on all sides, with the exception of small ventilation and viewport openings

What are the different types of switchgear?

Types of medium-voltage switchgear

  • Gas-insulated switchgear. 

  • Metal-clad switchgear. 

  • Metal-enclosed switchgear. 

  • Pad-mounted switchgear. 

  • Vault or subsurface switchgear.

What are switchgears used for?

In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.

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