ABB TA110DU-110M Thermal Overload Relay

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Product Overview

The ABB TA110DU‑110M is an industrial Thermal Overload Relay designed to provide overload protection for three‑phase AC motors and related equipment. It uses bimetallic elements to detect prolonged overcurrent conditions, triggering a trip when current exceeds the set range to protect the motor from overheating. This relay is compatible with ABB contactors and is a key component of motor control and protection systems.

Technical Specifications

• Model: TA110DU‑110M

• Type: Thermal Overload Relay

• Current Range: 11–16 A (adjustable)

• Phase: Three‑phase

• Rated Insulation Voltage: AC 690 V

• Auxiliary Contacts: 1 NO + 1 NC (for control/feedback)

• Tripping Mechanism: Thermal (bimetallic strip)

• Reset Method: Manual or automatic (model dependent)

• Contactor Compatibility: Works with ABB AF series contactors

• Operating Temperature: ‑25 °C … +60 °C

• Standards: IEC 60947‑4‑1 / EN 60947‑4‑1

• Mounting: DIN rail or direct mounting with contactor

• Protection Rating: IP20

• Dimensions (W×H×D): approx. 45 × 90 × 70 mm

• Weight: approx. 0.3 kg

Advantages and Features

1. Effective Overload Protection
   Bimetallic thermal response accurately detects prolonged overload or stall current, preventing motor damage.

2. Adjustable Current Setting
   Suitable for a wide range of motors within 11–16 A, enhancing versatility.

3. Contactor Integration
   Easily pairs with ABB AF series contactors for compact motor control and protection assemblies.

4. Dual Auxiliary Contacts
   Includes one normally‑open and one normally‑closed contact for status feedback and system integration.

5. Compact and Convenient Installation
   DIN rail or contactor‑mounted design simplifies cabinet layout.

6. Industrial‑Grade Reliability
   Designed to meet IEC standards, suitable for continuous industrial use.

Typical Applications

• Protection of industrial AC motors

• Control panels for pumps, fans, compressors

• Automated production line motor protection

• HVAC and building system motor protection

• Material handling and processing machine protection

Precautions

1. Match Current Setting
   Set the overload relay’s current adjustment according to the motor’s rated current before installation.

2. Proper Contactor Match
   Ensure the relay is paired with a compatible contactor model for correct mechanical and electrical fit.

3. Good Grounding and Wiring
   Ensure proper grounding and standardized wiring to prevent interference and ensure reliable performance.

4. Environmental Conditions
   Avoid installation in high humidity, corrosive atmospheres, or environments with severe vibration without appropriate protection.

5. Regular Checks and Maintenance
   Periodically inspect the relay’s status and auxiliary contact function to ensure continued reliable performance.