A-B 440G-EZS21STL05J Programmable controller

A-B (Allen-Bradley) Circuit Breakers Overview

Allen-Bradley offers a wide variety of circuit breakers designed to protect electrical circuits from overcurrent, short circuits, and ground faults. These circuit breakers are widely used in industrial, commercial, and residential applications.

Product Detailed Description

• Function:

• Automatically interrupts the circuit when overcurrent, short circuit, or ground fault is detected, preventing equipment damage and fire hazards.

• Provides manual means to open and close the circuit.

• Some models offer indication of the circuit status.

• Features:

• Wide range of current ratings and interrupting capacities to suit different application needs.

• Thermal-magnetic trip units provide overload and short-circuit protection.

• Optional electronic trip units offer more precise and adjustable protection characteristics.

• Multiple mounting options (e.g., DIN rail mounting, panel mounting).

• Wide range of accessories available, such as auxiliary contacts, alarm contacts, undervoltage releases, shunt trips, etc.

Product Parameters

As Allen-Bradley offers numerous series of circuit breakers, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Rated Current (In):

• Wide range, from a few amperes to thousands of amperes.

• Rated Operating Voltage (Ue):

• Suitable for various AC and DC voltages, such as 240V AC, 480V AC, 600V AC, DC.

• Interrupting Capacity (Icu/Ics):

• Expressed in kiloamperes (kA), indicating the maximum fault current the circuit breaker can safely interrupt. Icu is the ultimate breaking capacity, and Ics is the service breaking capacity.

• Number of Poles:

• Single-pole, two-pole, three-pole, four-pole.

• Trip Unit Type:

• Thermal-Magnetic

• Electronic

• Mounting Type:

• DIN Rail Mounting

• Panel Mounting

• Connection Method:

• Screw Terminals

• Lugs

• Standards Compliance:

• E.g., UL 489, IEC 60947-2.

Product Advantages

• Reliable Protection:

• Provides reliable protection against overcurrent, short circuits, and ground faults.

• Safety:

• Prevents damage to electrical equipment and fire hazards, ensuring personnel safety.

• Wide Selection:

• Extensive range of current ratings, interrupting capacities, and trip unit types to meet diverse application needs.

• Flexibility:

• Multiple mounting options and accessories are available.

• Ease of Use:

• Easy to install, operate, and maintain.

• Integration with Rockwell Systems:

• Can be easily integrated into Rockwell Automation control systems.

Precautions

• Correct Selection:

• Select the appropriate circuit breaker based on the circuit's rated current, expected fault current, and application requirements.

• Consider the impact of ambient temperature and altitude on the circuit breaker's performance.

• Correct Installation:

• Follow Allen-Bradley's installation guidelines, ensuring the circuit breaker is securely mounted and properly wired.

• Regular Maintenance:

• Periodically inspect the circuit breaker for damage or loose connections and perform necessary maintenance.

• Do Not Exceed Ratings:

• Ensure that the current in the circuit does not exceed the circuit breaker's rated current and interrupting capacity.

• Qualified Personnel:

• Installation, maintenance, and troubleshooting of circuit breakers should be performed by qualified electrical personnel.

Product Applications

• Industrial Automation:

• Protection of motor control circuits, power distribution circuits, etc.

• Commercial Buildings:

• Protection of lighting circuits, receptacle circuits, HVAC equipment, etc.

• Residential Applications:

• Protection of household electrical wiring.

• Machinery and Equipment:

• Integrated into the electrical control systems of various machinery and equipment to provide overcurrent protection.

• Renewable Energy Systems:

• Used for circuit protection in photovoltaic and wind power systems.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

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