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Hubei Dayu Hanguang Vacuum Electric Co.,Ltd.
CN EN

Vacuum interrupter for indoor circuit breaker TD368Y

Model:VITD12/4000-40

Category:VI for indoor circuit breakers

Product details

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Main Technical Specification
VOLTAGE RATINGS
Rated voltage(Ur)kV12
Rated short-time(1min)power-frequency withstand voltage(Ud)kV48
Rated lightning impulse withstand voltage(Peak)(Up)kV85
Rated frequency(fr)Hz50
CURRENT RATINGS
Rated current(Ir)A3150/4000
Circuit resistance at lowest rated contact forceμΩ≤15
Rated short-circuit breaking current(lsc)kA40
Breaking operations of rated short circuit breaking currentTimes30
Rated short-time withstand current(lk)kA40
Rated duration of short-circuit(tk)s4
Rated peak withstand current(lp)kA100
Rated short-circuit making current(lMc)kA100
Rated cable-charging breaking current(lc)A25
Rated breaking current of single capacitor bank(lsb)A400
Rated breaking current of back-to-back capacitor bank(lbb)A400
MECHANICAL DATA
Weight of movable partskg≤3.2
Closing force due to bellow and atmosphereN250±50
Force required to hold contacts open at full strokeN330±60
MECHANICAL REQUIREMENTS
Clearance between open contactsmm11±1
Average opening speed (contact close position~75%contact gap)m/s1.0±0.25
Average closing speed (30%contact gap-contact close position)m/s0.6±0.15
Rated added external contact final forceN4250±200
Added external contact force at contact touch point3000±200
Contact bouncing duration at closing operationms≤2
Closing and opening non-simultaneity of three-phase contactsms≤1
Maximum rebound during openingmm≤3
LIFE
Storage lifeyears20
Rated mechanical enduranceTimes10000
Contacts limit erosionmm3

Relevant information

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