CKJ5 Series 1140V AC Low Voltage Vacuum Contactor – 63A/80A/125A Magnetic Contactor for Explosion-Proof Starters

CKJ5 Series 1140V AC Low Voltage Vacuum Contactor (63A / 80A / 125A)

Product Overview

The CKJ5 series is a high-performance low-voltage (L.V.) vacuum contactor designed for power systems operating at AC 50Hz with a rated voltage of 1140V. This series is engineered for the long-distance making and breaking of circuits and is ideal for the frequent starting and control of AC motors. With a maximum current capacity of up to 660A within the broader series, these specific models provide reliable switching for medium-to-high power industrial loads.

Core Advantages

• Explosion-Proof Compatibility: Specifically optimized for integration into explosion-proof electromagnetic starters, making them indispensable for hazardous sectors like coal mining, petroleum, and chemical processing.

• Maintenance-Free Technology: Utilizing vacuum as the arc-extinguishing medium, the contact system is protected from environmental degradation, ensuring a long service life with zero contact maintenance.

• Robust Mechanical Design: Features a compact, orange insulated housing with a dependable spring-driven mechanism for consistent performance under high-frequency operation.

• High Operational Frequency: Supports an AC3 operating frequency of up to 300 times/hour, suitable for demanding industrial duty cycles.

Technical Specifications

Standard Working & Installation Conditions

• Ambient Temperature: Reliable operation within -5°C to +40°C, with a 24-hour average not exceeding +35°C.

• Altitude: Installation site altitude should not exceed 2000 meters.

• Humidity: At +40°C, relative humidity should stay below 50%; higher levels (up to 90% at 20°C) are acceptable at lower temperatures.

• Installation Angle: The inclination between the mounting surface and the vertical plane must not exceed ±15°.

• Environment: Designed for areas free from significant vibration, shock, or corrosive gases.