A-B 700-TBR24 Central control module

A-B Contactors Overview

A-B (Allen-Bradley), part of Rockwell Automation, contactors are widely used electromagnetic switches in industrial control for controlling the starting, stopping, and protection of electric motors, lighting, heating, and other electrical loads. They are known for their reliability, durability, and broad range of applications.

Product Detailed Description

• Function:

• Controls the starting, stopping, and reversing (for reversing contactors) of electric motors.

• Switches electrical loads.

• Provides overload and short-circuit protection for motors (when combined with appropriate overload relays).

• Used in building motor starters, soft starters, and variable frequency drives.

• Features:

• Rugged industrial-grade design suitable for harsh environments.

• Wide range of sizes and ratings to meet various application needs.

• Easy to install and maintain.

• Offers a variety of auxiliary contacts, coil voltages, and accessories.

• Reliable performance and long service life.

• Some models feature integrated electronic overload protection or easy integration capabilities.

Product Parameters

As A-B offers a wide variety of contactors, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Rated Current (Ie):

• Wide range, from a few amperes to hundreds of amperes, depending on the model and utilization category (AC-1, AC-3, AC-4, etc.).

• Rated Voltage (Ue):

• Suitable for various AC and DC voltages, commonly including 24V AC/DC, 110V AC, 230V AC, 400V AC, 600V AC, etc.

• Number of Poles:

• Typically three poles, but single-pole, two-pole, and four-pole models are also available.

• Auxiliary Contacts:

• Offers various normally open (NO) and normally closed (NC) auxiliary contact configurations.

• Coil Voltage (Uc):

• Wide selection of AC and DC coil voltages available.

• Overload Protection:

• Some models integrate electronic overload protection, or require use with external overload relays.

• Short-Circuit Protection:

• Requires use with appropriate short-circuit protection devices (e.g., circuit breakers or fuses).

• Degree of Protection (IP):

• Varies depending on the model and accessories, commonly including IP20, IP40, IP65, etc.

• Mounting Method:

• DIN rail mounting, screw mounting, etc.

• Standards Compliance:

• IEC 60947-4-1, UL 508, etc.

Product Advantages

• High Reliability:

• A-B contactors are known for their reliable performance in demanding industrial environments.

• Wide Range of Applications:

• Suitable for various motor control and electrical load switching applications.

• Easy Integration:

• Offers a wide range of accessories and interfaces for easy integration into control systems.

• Global Support:

• Rockwell Automation provides extensive technical support and after-sales service worldwide.

• Safety:

• When used with appropriate protective devices, provides reliable overload and short-circuit protection.

• Modular Design:

• Allows users to add modules such as auxiliary contacts according to their needs.

Precautions

• Correct Selection:

• Select the appropriate contactor model based on the motor's rated power, current, voltage, and utilization category (starting frequency, load characteristics, etc.).

• Correct Installation:

• Follow Rockwell Automation's installation guidelines, ensuring the contactor is securely mounted and wired correctly.

• Overload Protection Coordination:

• For motor control applications, it is essential to use appropriate overload relays to protect the motor from overload damage.

• Short-Circuit Protection Coordination:

• It is essential to use appropriate short-circuit protection devices (such as circuit breakers or fuses) to protect the circuit from short-circuit faults.

• Environmental Conditions:

• Ensure the operating environment temperature, humidity, and altitude are within the product specifications.

• Regular Maintenance:

• Regularly inspect the contactor's contacts, coil, and wiring to ensure they are in good working order.

• Safe Operation:

• Always follow electrical safety regulations during installation, maintenance, and operation.

Product Applications

A-B contactors are widely used in various industrial and commercial sectors, including but not limited to:

• Motor Control:

• Control of various motor starting methods such as direct-on-line (DOL), star-delta, and reversing.

• Control of various industrial motors such as pumps, fans, compressors, and conveyors.

• Lighting Control:

• Control of large lighting systems.

• Heating Control:

• Control of industrial heating equipment.

• HVAC (Heating, Ventilation, and Air Conditioning):

• Control of compressors, fans, etc.

• Material Handling:

• Control of cranes, conveyors, etc.

• Packaging Machinery:

• Control of various actuators.

• Machine Tools:

• Control of spindle motors, cooling pumps, etc.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

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