ABB 1SVR730740R0300 Temperature monitoring relay

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• 1. Product Overview

  ABB 1SVR730740R0300 Temperature Monitoring Relay is a highly reliable device designed for continuous temperature supervision in industrial and power systems. It monitors the temperature of equipment or processes via an external sensor and activates an output relay when the temperature exceeds or falls below a preset threshold.

  This relay is ideal for applications requiring overtemperature protection and early fault detection, helping to prevent thermal damage and improve system safety.

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  2. Main Technical Data

  General

  • Product type:
    Temperature monitoring relay

  • Function:
    Temperature supervision, alarm, and control output

  • Measuring principle:
    Temperature detection via external sensor

  Temperature Monitoring Characteristics

  • Supported sensor types:
    Common industrial temperature sensors (e.g. PTC / PT100, depending on configuration)

  • Temperature setting range:
    Covers typical industrial operating temperature ranges

  • Setting method:
    Adjustable setpoint (via potentiometer or DIP switches)

  • Response:
    Relay activation when temperature exceeds or drops below the set value

  • Reset mode:
    Automatic or manual reset (depending on model)

  Outputs and Indication

  • Output contacts:
    Changeover relay contact (NO / NC)

  • Output function:
    Alarm signaling or control circuit switching

  • Indication:
    LED indicators for power and relay status

  Power Supply

  • Auxiliary supply voltage:
    Wide-range auxiliary supply suitable for industrial control systems

  • Power consumption:
    Low power consumption for continuous operation

  Installation and Environment

  • Mounting:
    DIN rail mounting

  • Housing:
    Modular industrial enclosure

  • Operating temperature:
    Suitable for standard industrial environments

  • Immunity:
    Designed to meet industrial EMC requirements

  Standards and Reliability

  • Compliance:
    IEC / EN standards for industrial control and measuring devices

  • Operation:
    Designed for continuous long-term service

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  3. Key Advantages and Features

  1. Reliable Temperature Protection
     Continuous monitoring helps prevent overheating and equipment damage.

  2. Flexible Setpoint Adjustment
     Adjustable thresholds to suit various applications.

  3. Industrial-Grade Stability
     Reliable operation in harsh industrial environments.

  4. Versatile Control Functions
     Suitable for alarm, interlocking, or direct control applications.

  5. Compact and Easy Installation
     DIN rail mounting saves panel space.

  6. Low Maintenance Requirements
     Stable operation reduces downtime and maintenance effort.

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  4. Typical Applications

  • Motor temperature protection

  • Transformer temperature monitoring

  • Switchgear and control panel temperature control

  • Industrial automation equipment

  • Power generation and energy systems

  • HVAC and building services

  • Chemical, metallurgical, and process industries

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  5. Installation and Application Notes

  1. Correct sensor selection
     Use temperature sensors compatible with the relay specifications.

  2. Proper setpoint adjustment
     Set alarm values according to permissible equipment temperature limits.

  3. Correct wiring practices
     Ensure secure wiring of sensors and output contacts to avoid false operation.

  4. Proper grounding
     Improves noise immunity and measurement stability.

  5. Periodic functional testing
     Regular testing of relay operation and alarm function is recommended.

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The structure and details of the product：

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