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ABB VD4 embedded pole

ABB VD4 embedded pole

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Product Details:

ABB VD4 embedded pole


1.VD4 embeded poles, ABB similar, rated voltage 12KV/24KV, 630A
2.Prompt delivery
3.Competitive price
4.well and good quality

Parameters of solid seal pole column
Rated voltage kV 12/24
Rated current A 630
Rated frequency Hz 50/60
Short-duration(1min) power frequency withstand voltage kV 48
Lightning impulse withstand voltage kV 95
Rated short-circuit breaking current kA 20
Rated peak withstand current kA 50
Rated short-circuit making current kA 50
Rated short-time withstand current kA 20
Rated duration of short-circuit S 4
Rated breaking current of single capacitor bank A 400
Rated breaking current of back to back capacitor bank A 400
Rated operating sequence O-0.3s-CO-180s-CO
Breaking operations of rated short circuit breaking  current Time 30
Mechanical endurance Time 20000
Contact self-close force N 80±50
Force required to hold contacts open at full stroke N 150±50
Circuit resistance at lower limit of rated contact force ≤ 35
Contact limit erosion mm 3
Gas pressure inside vacuum interrupter Pa ≤ 1X10-3
Partial discharge Pc ≤ 5
Weight of moving parts Kg
Weight of vacuum interrupter embedded poles Kg
Mechanical data required for the matched vacuum switchgear
Clearance between open contacts mm 9±1
Average opening speed m/s 1.1±0.15
Average closing speed m/s 0.7±0.2
Rated contact pressure N 2000±200
Contact bouncing duration at closing operation ms ≤ 2
Out of simultaneity of contact closing and opening ms ≤ 2
Bouncing back amplitude of opening contact mm ≤ 3

Information for solid seal pole column
From the development of insulation on breakers,it can be divided into three generations:air, composite and solid insulation. And so-called solid insulation means solid seal pole column,which might represent the great advancement of insulation on vacuum breakers.Since the epoxy can be used to replace the insulating and mechanical supports,the breakers therefore become compact and simple and are able to service under humid and dusty conditions.When the external insulation of miniature chambers in air condition fail to fulfill the requests of specifications,solid seal pole column are therefore introduced and now become one of the most applicable ways in the field of medium voltage breakers either at home or abroad.

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