GE CR193B110L005050U

GE CR193B110L005050U is a vacuum contactor with a rated current of 400 A, manufactured by General Electric (GE). It is suitable for 600 V (AC) power systems and belongs to GE’s vacuum switch series. Designed specifically for starting, stopping, and protecting high-current, high-power motors and power distribution circuits, this product features reliable arc-extinguishing performance and a long service life.

Key Technical Parameters

• Rated Current: 400 A
• Rated Voltage: 600 V AC (operable within the range of 400 V – 690 V)
• Pole Configuration: Single-pole, double-pole, or multi-pole
• Contact Type: Vacuum interrupter, equipped with high-strength ceramic vacuum bottles to ensure fast and reliable arc extinguishing
• Mechanical Life: ≥ 100,000 operations
• Electrical Life: ≥ 1,000,000 operations
• Rated Short-Circuit Breaking Capacity: ≥ 10 kA
• Operating Temperature Range: -25 °C ~ +55 °C
• Protection Class: IP 20 (for indoor installation)

Product Features

1. Vacuum Arc-Extinguishing Technology: The interior of the vacuum bottle contains almost no gas, enabling fast arc extinguishing. Arc energy is effectively absorbed, reducing impact on the system.
2. High Reliability: Both mechanical and electrical lifespans reach industry-leading levels, allowing for long maintenance intervals.
3. Compact Structure: Adopts a modular design, facilitating standardized installation in power distribution cabinets.
4. Low Noise & Low Maintenance: No oil or lubricants are required, resulting in low operating noise and eliminating the need for regular maintenance to replace arc-extinguishing media.
5. Strong Short-Circuit Withstand Capacity: Capable of safely breaking under high short-circuit current conditions, enhancing system safety.

Structure and Composition

• Vacuum Bottle: Made of high-strength ceramic material, with a vacuum inside to form an arc-extinguishing space.
• Contact System: Includes main contacts and optional auxiliary contacts. Constructed from copper alloy or silver alloy to provide low contact resistance.
• Operating Mechanism: A spring-return mechanism driven by an electromagnet, enabling fast closing and opening.
• Terminal Block: Used for wiring, featuring bolt connection in compliance with IEC standards.
• Enclosure: A metal frame structure that provides mechanical protection and facilitates installation in power distribution cabinets.

Typical Application Fields

• Starting and Stopping of Large Motors: Such as industrial motors with a current of 400 A or above, used in pumps, compressors, fans, etc.
• Power Distribution Systems: Protection for main circuits or branch circuits in high-voltage power distribution cabinets and substations.
• Mining, Metallurgy, and Chemical Industries: Heavy-duty scenarios requiring high reliability and strong short-circuit withstand capacity.
• Power Facilities: Circuit switching and protection devices in power plants and substations.

Installation Points

1. Model Selection Confirmation: Confirm the contactor model and pole configuration based on system voltage, rated current, short-circuit capacity, and other parameters.
2. Wiring: Use copper-core cables that meet IEC standards. Ensure terminal connections are tight and secure to avoid overheating caused by loose connections.
3. Mounting Position: Install horizontally inside the power distribution cabinet. Maintain sufficient heat dissipation space and avoid direct contact with high-temperature components.
4. Grounding: The enclosure must be reliably grounded to prevent electric leakage.
5. Auxiliary Contacts (if used): Connect to the control circuit according to circuit requirements to ensure complete signals.

Maintenance and Inspection

1. Regular Inspection: Check the tightness of terminals, the integrity of the enclosure, and the spring tension of the operating mechanism every 6 – 12 months.
2. Insulation Testing: Use an insulation resistance meter to measure the insulation resistance of the vacuum bottle, ensuring insulation performance meets specifications.
3. Replacement Cycle: When the mechanical or electrical life is approaching its limit (approximately 100,000 operations / 1,000,000 operations), it is recommended to replace the main contacts or the entire unit to prevent sudden failures.
4. Fault Diagnosis: In case of abnormal noise, poor contact, or frequent tripping, first check the power supply voltage, load current, and wiring status. Replace damaged contacts or operating mechanism components if necessary.

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