Description
JCZ5 Series Overview
The JCZ5 indoor AC vacuum contactor is designed for three-phase AC 50 Hz power systems and frequent switching of medium-voltage motors, transformers, and capacitive loads. The published series data covers 7.2 kV and 12 kV variants with rated currents of 250 A, 400 A, or 630 A. Select the voltage, current, and control configuration for the intended circuit rather than treating all listed values as one fixed model.
Operating Conditions
- Altitude: no more than 1,000 m above sea level
- Ambient temperature: -5°C to 40°C
- Maximum 24-hour average temperature: 35°C
- Relative humidity: no more than 50% at 40°C
- Pollution degree: Class 3
Electrical Ratings
| Parameter | Unit | 250 A variant | 400 A variant | 630 A variant |
|---|---|---|---|---|
| Rated voltage | kV | 7.2 / 12 | ||
| Rated current | A | 250 | 400 | 630 |
| Rated closed current (existing specification) | A | 2,500 | 4,000 | 6,300 |
| Rated maximum breaking current | A | 2,000 | 3,200 | 5,040 |
| 4 s thermal stability current | A | 2,500 | 4,000 | 6,300 |
| Maximum breaking current (existing specification) | A | 2,500 | 4,000 | 6,300 |
| Power-frequency withstand voltage | kV | 42 | ||
| Permitted operating frequency | operations/hour | 300 | ||
| Electrical life, AC-3 duty | operations | 25 × 104 | ||
| Electrical life, AC-4 duty | operations | 10 × 104 | ||
Control and Operating Data
| Parameter | Published value |
|---|---|
| Control-circuit rated voltage | AC 110 / 220 V |
| Closing-coil current | ≤ DC 6 / 3 A |
| Holding-coil current | D: DC 0.32 / 0.16 A |
| Shunt-trip coil current | J: DC 2.5 / 1.3 A |
| Contact distance | 1.5 ± 0.5 mm |
| Average closing speed | 0.1–0.25 m/s |
| Average opening speed | 0.3–0.6 m/s |
| Three-phase opening synchronism | ≤ 2 ms |
| Closing / opening time | ≤ 150 / ≤ 50 ms |
| Resistance at 20°C | ≤ 250 μΩ |
Application and Selection
The JCZ5 series is intended for repeated circuit making and breaking in motor control, transformer switching, capacitor-bank switching, and related power-distribution duties. The series is available with mechanical latching or electromagnetic holding arrangements.
The page title identifies the 7.2 kV product, while the series specification also lists a 12 kV option. Before ordering, confirm the required system voltage, continuous current, switching duty, control voltage, holding arrangement, and installation conditions. These inputs determine which JCZ5 configuration should be quoted.
Request a Configuration Review
Send the required rated voltage and current, control voltage, load type, expected switching frequency, installation altitude, and ambient-temperature range. Kampa Electric can then check the requested configuration against the published JCZ5 series data.
FAQ
Which voltage and current ratings are listed for the JCZ5 series?
What equipment can the JCZ5 vacuum contactor switch?
What operating conditions are specified?
What control voltage is listed?
What information should I provide for selection?
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.