Indoor three-phase high-voltage AC vacuum contactor，JCZ5A(Z)-250A

1. Electrical parameters of the main circuit:
Rated voltage: 7.2kV (50Hz three-phase AC)
Rated working current: 250A
Usage category: AC-3 (frequent start stop of high-voltage motor), AC-6b (switching of high-voltage capacitor bank)
Rated short-time withstand current: 4kA/4s
Rated peak withstand current: 10kA
Power frequency withstand voltage: phase to phase/ground 42kV, fracture 48kV
Resistance of each phase circuit in the main circuit: ≤ 200 μ Ω
2. Mechanical characteristic parameters:
Contact opening distance: 4 ± 0.5mm
Contact overtravel: 1.5 ± 0.3mm
Rated operating frequency: 300 times/hour
Mechanical lifespan: ≥ 300000 cycles
AC-3 electrical lifespan: ≥ 250000 cycles; AC-4 electrical lifespan: ≥ 100000 cycles
Three phase closing asynchrony: ≤ 3ms
Closing bounce time: ≤ 10ms
3. Control circuit (Z-mechanical holding type):
Control coil conventional voltage: AC220V, DC220V (customizable 110V)
Closing only provides instantaneous power, relying on mechanical buckles to maintain the closing position; Opening requires the release coil to be powered on for unlocking
Auxiliary contacts: standard 4 normally open and 4 normally closed, rated 5A/AC220V