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TF426E VITF 24/1250-31.5E


TF426E VITF 24/1250-31.5E

If Vacuum Interrupter For Load Breaking Switches are the need of the clients then, we have the perfect solution for them. We have gained expertise in offering superior quality Vacuum Interrupter For Load Breaking Switches in a time bound manner. We assure that the Vacuum Interrupter For Load Breaking Switches are originally manufactured in complete compliance with the set industrial standards. The Vacuum Interrupter For Load Breaking Switches are appreciated for their high electrical endurance, mechanical life and shelf life.

Electrical Ratings (3Phase) Symmetrical Basis
Rated frequency50/60Hz
Rated Voltage24kV,r.m.s
Rated short-time power-frequency withstand voltage (1 min)60kV,r.m.s
Rated lightning impulse withstand voltage145kV,Peak
Rated Current1250A
Maximum Contact Resistance at Minimum Closing Forceテ「可、35Micro ohms
Rated short-time withstand current31.5kA,r.m.s
Rated duration of short-circuit1s
Rated peak withstand current85kA,r.m.s
Rated short-circuit making Current31.5kA,r.m.s
Rated active load breaking current1250A
Rated closed-loop breaking current1250A
Rated capacity of no-load transformer10A
Rated cable-charging breaking current16A
Rated line charging breaking current1.5A
Rated earth fault breaking current48A
Rated cable and line charging breaking current under earth fault condition27.7A
*Rated breaking current of single capacitor bank400A
*Rated breaking current of back-to-back capacitor bank400A
Mechanical Data
Interrupter Weight(Approx.)2.96kg
Weight of movable parts1.28kg
Closing force due to bellow and atmosphere120テつア30N
Force required to hold contacts open at full stroke190テつア50N
Mechanical Requirements (Ref. Lbs)
Clearance between open contacts13テつア1mm
Average opening speed(average of first 75% of contact gap)1.35テつア0.2m/s
Average closing speed(average of last 30% of contact gap)0.8テつア0.2m/s
Rated added external contact final force1500テつア100N
Contact bouncing duration at closing operationテ「可、2ms
Closing and Opening non-simultaneity of three-phase Contactsテ「可、2ms
Maximum Rebound during openingテ「可、2ms
Life
Storage life20years
Mechanical endurance10000 Operations
Contacts limit erosion3mm

Note
  • Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-200 and JB 8738-2008.
  • * Rated Characteristics to be given on request"

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