Robust Three-Pole Vacuum Contactor for Demanding Medium-Voltage Applications

Designed for industrial and utility-grade Power Systems, the ECV8-7.2kV High Voltage three poles vacuum contactor delivers exceptional reliability in controlling motors, transformers, and reactive compensation equipment. With a rated voltage of **7.2 kV or 12 kV** and current ratings from **160A to 630A**, this three-pole contactor combines advanced vacuum interruption technology with precise mechanical synchronization to ensure stable operation—even under frequent switching or high inrush conditions.

• three-phase motor starting contactor – enables smooth, arc-free energization with ≤3 ms phase synchronism

• medium-voltage switchgear component – withstands 42 kV power frequency and 75 kV lightning impulse voltages

• high-frequency capacitor switching device – supports up to 600 operations/hour in short-term duty cycles

Built for longevity and safety, the ECV8 series features a mechanical life of **300,000 operations** and electrical endurance of **100,000 cycles (AC-4)**. Its compact modular structure integrates seamlessly into metal-clad switchgear, while auxiliary contacts (3a+3b) and flexible control voltage options (AC/DC 110V/220V) enhance system compatibility. The contactor’s fast opening time—**as low as 60 ms** for mechanical-holding types—minimizes fault duration and protects downstream equipment.

Whether deployed in mining facilities, water treatment plants, or renewable energy substations, this vacuum contactor ensures consistent performance under 50/60 Hz networks. Its robust design meets IEC and ANSI standards for dielectric strength, short-circuit withstand (up to **25×Ie peak current**), and thermal stability. As illustrated in the image above, the clean, symmetrical housing reflects a focus on serviceability, electromagnetic compatibility, and long-term operational integrity—making it a strategic choice for engineers building resilient medium-voltage infrastructure.