vacuum interrupter
Embedded poles
vacuum interrupter for outdoor circuit breaker
vacuum interrupter for indoor circuit breaker
vacuum interrupter for load break switch
vacuum interrupter for contactor
Products >> Embedded poles
ZKTF1250/40.5-25 TF52401

Main Technical Data
Rated voltage                                             kv 40.5
Rated current                                             A 1250
Rated frequency                                          Hz 50
Rated short-time power frequency withstand voltage(1min)      kv 95
Rated lighting impulse withstand voltage                      kv 185
Rated short-time withstand current                          kA 16/20
Rated withstand current(peak)                     kA 50/63
Rated short-circuit making current  kA 50/63
Rated closed-loop breaking current A 1250
Rated active load breaking current                 A 1250
Rated cable charging breaking current                        A 21
Rated single capacitor bank breaking currentrrent                                A 2000
Rated duration of short-circuit                               s 4
Mechanical life                                            times 10000
Contact closing force due to bellows and atmosphere           N 150±40
Counterforce at rated contact stroke                           N 210±50
Circuit resistance at rated contact force                       μΩ ≤30
Shelf life                                                   years 20
Contact erosion limit                                        mm 3
Weight of moving parts                                                                              kg ≤1.3
Mechanical Data Required For Matched Vacuum Switchgear                                           
Rated contact stroke                                       mm 20±1
Average opening speed                                    m/s 1.6±0.2
Average closing speed                                     m/s 0.8±0.2
Added contact force                                        N 1800/2200±200
Contact bouncing duration at closing operation                 ms 2
Contact bouncing bank amplitude of opening operation          mm ≤1
Three-pole simultaneity                                      ms ≤2
Note:Rated characteristics can be given on requirment

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