Description
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
| 1 | Rated Voltage (kV) | 10 | 15 | 24 | |||||
| 2 | 1min power frequency withstand voltage (Effective value) kV | To Ground | 42 | 55 | 65 | ||||
| Between Fracture | 48 | 65 | 79 | ||||||
| 3 | Lightning Impulse withstand voltage (Peak value) kV | To Ground | 75 | 105 | 125 | ||||
| Between Fracture | 85 | 120 | 145 | ||||||
| 4 | Mechanical life (Times) | 2000 | |||||||
| 5 | Rated Current (A) | 200 | 400 | 630 | 1250 | 400 | 630 | ||
| 6 | Rated short time withstand current (kA/4s) | 6.3 | 12.5 | 20 | 31.5 | 16 | 20 | ||
| 7 | Rated peak withstand current (kA) | 16 | 31.5 | 50 | 80 | 40 | 50 | ||
| 9 | Creepage distance (mm) | 300 | 380 | ||||||
Outline & Mounting Dimensions
