Epoxy Resin Spouts Embedded Poles for ABB VD4 Vacuum Circuit Breaker

Epoxy Resin Spouts Embedded Poles for ABB VD4 Vacuum Circuit Breaker

• specification
• Parameters
• About more

• Vacuum circuit breaker pole, relates to a kind of high voltage vacuum switch with arc extinguishing or arc prevention device. With epoxy resin shell, vacuum interrupter chamber and other parts of the primary conductive circuit, vacuum interrupter chamber and other parts of the primary conductive circuit with epoxy resin cast into the shell, dynamic conductive block and the lower outlet terminal with spring coupling. The assembly process is simplified, the insulation reliability is high, from external forces and external environmental pollution, eliminating the use of ceramic material vacuum interrupter chamber and the use of epoxy resin casting shell between the contraction force inconsistent stress, to avoid damage to the vacuum interrupter chamber or epoxy resin casting body. Because of the sliding connection method of contact finger spring between the dynamic conductive block and the lower outlet terminal, the structure is simple and the contact resistance is small, especially suitable for the case of high current, which can be used for the control and protection of electrical equipment in power stations, distribution stations and substations, and suitable for frequent operation places.

  Features

  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

  MAIN TECHNICAL SPECIFICATION	UNIT		SPECIFICATION
  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	mΩ		≤ 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

  MAIN TECHNICAL SPECIFICATION	UNIT	SPECIFICATION
  		630
  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.