Anam Legrand Pak-12st-3 Thermal Overload Relay

What is the Anam Legrand PAK-12ST-3 thermal overload relay?

The Anam Legrand PAK-12ST-3 is a precision-engineered thermal overload relay that provides protection against overcurrent, overheating, and damage during operation for motors and electrical circuits. Thermal overload relays play an important role in both industrial and marine automation, where motors normally operate under variable loads.

This relay works on the principle of bimetallic thermal protection, detecting overload conditions and disconnecting the circuit before damage can take place. It is one of the most important relays in a motor control center and provides reliability, operational safety, and long equipment life.

Whether used with a contactor or integrated into a motor starter assembly, the PAK-12ST-3 provides robust performance across demanding automation, mechanical, and marine environments.

Some key features of the Anam Legrand PAK-12ST-3:

1. Accurate Thermal Overload Protection

The relay uses a bimetallic strip that reacts to excessive current levels, providing timely and precise overload detection.

2. Adjustable Current Settings

It allows the user to fine-tune the protection range according to motor specification, making it flexible in several applications.

3. Options for Manual and Automatic Reset

The relay supports both reset modes: this makes it suitable for various installation environments and operational requirements.

4. Trip Indicator Function

An inbuilt indicator showing the tripped condition facilitates quick diagnosis by maintenance teams.

5. High Durability for Industrial Use

Built of solid industrial-grade materials, the relay withstands vibration, heat, humidity, and long service cycles.

6. Compact, Easy to Install

Its modular configuration easily allows mounting with Anam/Legrand motor starters and contactors.

7. Wide Compatibility

Designed to work with many different models of contactors, it’s suitable for both new installations and replacement applications.

Applications of the Anam Legrand PAK-12ST-3 Thermal Overload Relay

This relay is widely used in many sectors wherever protection for a motor is crucial.

1. Industrial Automation Systems

Protects motors in conveyors, compressors, pumps, mixers, and other automated machinery.

2. Marine & Offshore Equipment

Used in ship engine rooms, deck machinery, HVAC systems, water pumps, and control panels.

3. Manufacturing Plants

Necessary in production lines, fabrication units, and continuous process industries.

4. HVAC and Building Management Systems

Safeguards compressors, ventilation fans, and mechanical equipment in commercial buildings.

5. Power Generation & Distribution Panels

Ensures safe operation of the auxiliary motors and electrical drives within the power networks.

6. Water Treatment & Pump Stations

Maintains reliable pump performance in municipal and industrial water applications.

Why Choose the Anam Legrand PAK-12ST-3?

1. Reliable motor protection

The relay provides reliable overload protection, preventing costly breakdowns and downtime.

2. Improved Operational Safety

It reduces the risk of overheating, short circuits, and mechanical failures by responding very fast to overloads.

3. Long Service Life

Engineered by Legrand/Anam with high-quality components known for durability and stable performance.

4. Easy Integration with Existing Systems

Fits smoothly with compatible contactors and motor starters, making upgrades or replacements fast and efficient.

5. Cost-Effective Protection Solution 

Reasonably-priced but highly effective, giving maximum motor safety without complication.

6. Trusted Brand in Electrical Protection

Legrand is worldwide known for safe, efficient, and innovative electrical control solutions, also included for industries and marine users.