The ABB 1SAZ211201R1047 TA25DU-19 Thermal Overload Relay is a protective device designed to safeguard electric motors and other equipment from overload conditions. Here’s a breakdown of the key features and specifications of this model:

Key Features:

Model Number: 1SAZ211201R1047
Type: Thermal Overload Relay
This type of relay protects electrical circuits, particularly motors, by sensing excessive heat caused by prolonged overcurrent conditions. It is widely used in motor protection circuits.
Current Range: 13 A to 19 A
The TA25DU-19 relay is designed for use with circuits where the load current falls within this range, making it ideal for protecting medium-sized motors.
Trip Class: Class 10
This indicates the response time to overloads. In Class 10, the relay trips within 10 times the rated current after a set amount of time. It is suitable for applications that need relatively fast overload protection.
Mounting: The relay is typically mounted directly to the contactor to create a motor protection unit. It integrates seamlessly with the ABB TA25 series contactors for efficient protection.
Adjustable Settings: The relay can be adjusted within its rated current range (13–19 A), allowing flexibility to match the protection needs of specific motors or equipment.
Overload Protection: Provides reliable protection for motors against overheating due to overload conditions. This ensures the motor does not suffer damage from prolonged overcurrent situations.
Temperature Compensation: The thermal overload relay is equipped with temperature compensation to adjust its operation based on the surrounding temperature, ensuring accurate protection in varying environments.
Manual Reset: After tripping, the relay requires a manual reset, preventing unnecessary restarts and ensuring that any faults are identified before re-energizing the circuit.

Common Applications:

Motor Protection: Widely used in motor control circuits to protect motors from thermal damage due to overload.
Industrial Equipment: Protects various types of industrial equipment and machinery, ensuring reliability and longevity of devices by preventing overheating.
HVAC Systems: Used in HVAC (heating, ventilation, and air conditioning) systems to protect compressors and other motor-driven components.

Advantages:

Reliability: ABB’s TA25DU-19 relay offers consistent and dependable overload protection, reducing the risk of motor damage due to electrical faults.
Cost-Effective: It provides an efficient, low-cost solution for motor protection, extending the service life of equipment and reducing maintenance costs.
Simple to Use: With adjustable settings and easy integration with ABB contactors, the relay is user-friendly and convenient for various industrial applications.

The ABB 1SAZ211201R1047 TA25DU-19 Thermal Overload Relay is an essential component in protecting electrical motors and machinery from the risk of overheating, making it a reliable choice for industrial and commercial applications requiring motor protection.

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