33kv Isolator Disconnector Disconnecting Switch

33KV Isolator Disconnector Disconnecting Switch lever to connect 3 single pole into a 3 pole single arm electric, linking disconnector linking lever composed of left and light rolling screw, it is easy to adjust 3 phase simultaneity, it may use as single pole as well. GW4 disconnector composed of bottom seat, support porcelain and electrical parts, 2 porcelain post of each pole installed on bearing seat of both sides of bottom seat, connected by crossed connection lever, it may horizontally rotating. Electric knife is made of copper pipe, connection point is in the middle of two porcelain post, knives fixed on the top of support porcelain respectively. When operation mechanism operated, one of two support porcelain rotated 90 degree, other one reverse rotated 90 degree, so knife opening or closing toward one side. Earthing knife moved on vertical face(main knife in horizontal), interlock of main knife and earthing knife realized by mechanical interlock or operation mechanism.

Technical data :
Item Specification Unit parameter
1 Rated voltage KV 40.5
2 Rated frequency Hz 50
3 Rated current A 630
4 Rated short-time withstand current KA/s 20/2
5 Rated peak withstand current KA 50
6 Lightning impulse withstand To earth kV 185
voltage (peak) Between open contacts kV 215
7 1 min power frequency To earth kV 95
withstand voltage (r.m.s.) Between open contacts kV 115