Embedded pole for vacuum circuit breaker 12kV EEP-12/1600-31.5 EEP-12/1250-31.5
Model No: EEP-12/1600-31.5 EEP-12/1250-31.5
Embedded pole,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 embedded pole
MAIN TECHNICAL SPECIFICATION UNIT SPECIFICATION 1600 1250 Rated voltage kV 12 Rated current A 1600 1250 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 31.5 Rated peak withstand current kA 80 Rated short-circuit making current kA 80 Rated short-time withstand current kA 31.5 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 140±50 Force required to hold contacts open at full stroke N 220±50 Circuit resistance at lower limit of rated contact force mΩ ≤ 25 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 1600 1250 Clearance between open contacts mm 11±1 Average opening speed m/s 1.2±0.2 Average closing speed m/s 0.6±0.2 Rated contact pressure N 3100±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 ≤ 2
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.
- embedded pole for vacuum circuit breaker 12kV EEP-12/1600-31.5 EEP-12/1250-31.5
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