Thermal Overload Relay

This thermal overload relay protects electric motors from overheating and damage due to overload conditions. It features adjustable current settings and auxiliary contacts for remote monitoring and control.

Relay - Image 1

Technical Specifications

Product Overview

Professional Thermal Overload Protection

This advanced thermal relay provides comprehensive protection for electric motors against overloads and phase failures in 50Hz or 60Hz circuits. Engineered for reliability, it features precise adjustable current settings and temperature compensation mechanisms. The unit is designed for seamless integration with AC contactors, offering a robust safety solution for industrial automation, infrastructure, and mission-critical control environments.


Thermal relay application environments
Compact and robust design suitable for industrial control rooms and distribution infrastructure.

Electrical Ratings

Rated Insulation Voltage
660 V
Auxiliary Circuit Insulation Voltage
500 V
Frequency Range
50-60Hz

Technical Specifications

Key Protection Features

  • Overload protection
  • Phase loss sensitivity
  • Temperature compensation
  • Manual reset and stop functions

Rated Current Range
0.1A - 96A
Auxiliary Contacts
1 NO1 NC

Thermal overload relay hardware overview
Thermal overload relay featuring adjustable current settings and phase loss sensitivity.
Control interface of the thermal relay
User-friendly control interface with dedicated reset and stop buttons for manual operation.

Performance Data

Three-phase Balance Motion Time

Setting MultiplierMotion TimeCondition
1.05>2hCold state
1.2<2hHeat state
1.5<4minHeat state

Test Ambient Temperature

20 °C
Ambient Temperature

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