TA924F ABB Controller module

Description

TA924F ABB Controller module

Product Dimensions：

Product Description

The TA924F is likely a Thermal Overload Relay, designed to provide reliable protection for motors against thermal damage caused by overload currents. It operates on the principle of thermal expansion of bimetallic strips, which trip the control circuit when the motor current exceeds a set limit for a specific duration.

• Type: Thermal Overload Relay or Overload Protection Module/Accessory.

• Function: Motor protection against excessive heating due to overload or phase loss/unbalance.

• Integration: Designed to be mounted directly onto or used in conjunction with ABB contactors (like A, AF series) or as a separate component in a motor starter assembly.

• Reset: Typically features an automatic or manual reset function.

Product Parameters

Since the specific “TA924F” designation is highly specialized, here are the typical parameters for an ABB thermal overload relay in this class. The key parameter is the tripping current range.

Product Advantages

• Reliable Thermal Protection: Offers proven and dependable protection against sustained motor overload, which is the most common cause of motor failure.

• Phase Loss Sensitivity: Provides protection against phase unbalance and phase loss, preventing severe damage to three-phase motors.

• Simple Integration: Designed for easy, direct connection to standard ABB contactors, streamlining the assembly of motor starter circuits.

• Cost-Effective: As a robust electromechanical device, it offers a cost-effective alternative for standard motor protection compared to more complex electronic relays.

• Adjustable Setting: Allows the user to precisely set the tripping current based on the specific motor’s full load current ($I_{FLA}$) for optimal protection.

Precautions

• Current Setting Accuracy: The tripping current must be set precisely to the motor’s rated full load current ($I_{FLA}$). Setting it too high defeats the protection; setting it too low causes nuisance tripping.

• Integration with Contactor: Ensure the TA924F is correctly mounted and electrically connected to the appropriate ABB contactor, verifying secure terminal connections for the main power and control wires.

• Wiring Standards: All wiring must comply with local and national electrical codes, paying special attention to wire sizing for the main power circuit.

• Ambient Temperature Derating: If the operating ambient temperature exceeds the rated limit (e.g., above $40^\circ \text{C}$), the maximum setting current must be derated according to the manufacturer’s specifications to maintain accurate protection.

• Test Function: Regularly utilize the built-in Test/Reset function (if available) to verify the mechanical integrity and proper functioning of the tripping mechanism and auxiliary contacts.

Product Applications

The TA924F, as a thermal overload relay, is an essential component in almost any standard motor control circuit.

• Direct-On-Line (DOL) Starters: Used in conjunction with a contactor to build a basic and robust DOL motor starter.

• Reversing Starters: Integrated into starter panels where motor direction needs to be reversed.

• Star-Delta (Wye-Delta) Starters: Applied to the main motor circuit to provide overload protection during both starting and running phases.

• Pump and Fan Control: Essential protection for motors driving pumps, ventilation fans, compressors, and general machinery in various industrial and commercial settings.

• HVAC Systems: Used for protecting the motors of air handlers and chilling units.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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