GW9-12 series Outdoor high voltage Disconnecting switch, also called Knife switch, is applied to rated voltage 12kV of  3phase AC 50HZ outdoor power system. Under the no load conditions it can switch on and off circuit to ensure when circuit maintenance it has obvious cut-off point.

The isolating switch is the vertical open design of double knife switch. The contact uses the way of crimping of double pull-out piece spring. It assures the stability of switch electrical contact and the reliability of switching.

The switch consists of base, post insulator conducting parts, insurance hook and  etc. Each phase has a knife switch, and insulation  hook rod can be used to open and close divide-shut brake. The knife switch  itself has a self-locking unit. The product conforms to IEC129,  IEC694,GB1985-89.

Environment condition

Ambient temperature: max +40°C min -25°C

Altitude: ≤1000m

Wind pressure: ≤700Pa (equals to wind speed 34m/s)

Air contamination degree: Ⅲ  degree

Earthquake intensity: ≤8 degree

No corrosive or flammable gas, no frequent violent vibration

Technical Data

Outline & Mounting Dimensions