1. Electrical parameters of the main circuit:
Rated working voltage: 6kV (7.2kV), 50Hz three-phase AC power
Rated working current: 250A
Usage category: AC-3 (frequent motor start stop), AC-6b (switching capacitor bank capacitive load)
Rated short-time withstand current (4s): 4kA
Rated peak withstand current: 10kA
Power frequency withstand voltage (1min): 42kV phase to phase/ground, 48kV fracture
Contact resistance of each phase in the main circuit: ≤ 200 μ Ω
2. Mechanical and lifespan 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: ≤ 2ms
3. Control circuit parameters (permanent magnet M-type):
Conventional control coil voltage: AC220V, DC220V (AC110V/DC110V can be customized)
Instantaneous high current when closing, only slight power consumption is maintained after permanent magnet holding, and the coil is not easily overheated and burned out
Open the circuit by energizing the trip coil for tripping
Auxiliary contacts: conventional 4-open and 4-closed, rated 5A, AC220V
Three phase high-voltage AC vacuum contactor，JCZ6B(M)-250A Specifications
| Rated working voltage | 6kV (7.2kV), 50Hz three-phase AC power |
|---|---|
| Rated working current | 250A |
| Usage category | AC-3 (frequent motor start stop), AC-6b (switching capacitor bank capacitive load) |
| Rated short-time withstand current (4s) | 4kA |
| Rated peak withstand current | 10kA |
| Power frequency withstand voltage (1min) | 42kV phase to phase/ground, 48kV fracture |
| 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 | ≤ 2ms |
| Conventional control coil voltage | AC220V, DC220V (AC110V/DC110V can be customized) |
| Auxiliary contacts | conventional 4-open and 4-closed, rated 5A, AC220V |
About the Three phase high-voltage AC vacuum contactor，JCZ6B(M)-250A
The Three phase high-voltage AC vacuum contactor，JCZ6B(M)-250A is a electrical products used in industrial automation, control and power systems. It is rated at Rated working voltage 6kV (7.2kV), 50Hz three-phase AC power, Rated working current 250A, Usage category AC-3 (frequent motor start stop), AC-6b (switching capacitor bank capacitive load). This electrical products is supplied as new, original industrial-grade stock. Each unit is identified by manufacturer part number Three phase high-voltage AC vacuum contactor，JCZ6B(M)-250A for accurate procurement and cross-referencing.
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- Verified part number: every Three phase high-voltage AC vacuum contactor，JCZ6B(M)-250A is checked against its manufacturer specification before shipment.
- 14 confirmed technical parameters available on this page for engineering review.
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