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  • Embedded Pole For Vacuum Circuit Breaker EEP-122500-40
  • Embedded Pole For Vacuum Circuit Breaker EEP-122500-40

Embedded Pole For Vacuum Circuit Breaker EEP-122500-40

Description:

Model No: EEP-12/2500-40

Epoxy embedded poles,or called vacuum interrupters with epoxy resin,is made by casting vacuum interrupters,main circuit conduct and mounting parts with epoxy into an integral part. The vacuum interrupters, however,should be enveloped well with a slight fold of silicon rubber jacket before that process.

ways in the field of medium voltage breakers either at home or abroad.

  • Product Description

Model No: EEP-12/2500-40

Epoxy embedded poles,or called vacuum interrupters with epoxy resin,is made by casting vacuum interrupters,main circuit conduct and mounting parts with epoxy into an integral part. The vacuum interrupters, however,should be enveloped well with a slight fold of silicon rubber jacket before that process.

Parameters of vacuum circuit breaker embedded poles

MAIN TECHNICAL SPECIFICATION UNIT SPECIFICATION
2500
Rated voltage kV 12
Rated current A 2500
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 40
Rated peak withstand current kA 100
Rated short-circuit making current kA 100
Rated short-time withstand current kA 40
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-co180S-co
Breaking operations of rated short circuit breaking current Time 30
Mechanical endurance Time 20000
Contact self-close force N 120±50 
Force required to hold contacts open at full stroke N 200±50 
Circuit resistance at lower limit of rated contact force mΩ  ≤ 20 
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
2500
Clearance between open contacts mm 10±1 
Average opening speed m/s 1.05±0.15 
Average closing speed m/s 0.7±0.1 
Rated contact pressure N 5000±200 
Contact bouncing duration at closing operation ms ≤ 3 
Out of simultaneity of contact closing and opening ms ≤ 2 
Bouncing back amplitude of opening contact mm ≤ 3 

Information for Embedded Pole

From the development of insulations on breakers,it can be divided into three generations:air,composite and solid insulation and so-called solid insulation means epoxy embedded pole,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 insulations of miniature chambers in air condition fail to fulfill the requests of specifications,embedded poles are therefore introduced and now become one of the most applicable ways in the field of medium voltage breakers either at home or abroad.

drawing Embedded pole for vacuum circuit breaker EEP-12/2500-40

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