ABB 1SVR430720R0400 Temperature Monitoring Relay

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• • • 1. Product Overview

      The ABB 1SVR430720R0400 is a temperature monitoring relay designed to monitor and protect motors, transformers, or other critical equipment from overheating. It detects signals from external thermistors (PTC/NTC) and triggers alarms or control outputs based on preset temperature thresholds, ensuring safe and reliable operation.

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      2. Technical Specifications

      • Model: 1SVR430720R0400

      • Type: Temperature Monitoring Relay

      • Input Type: PTC/NTC thermistor

      • Operating Voltage: 24–240 V AC/DC

      • Output Contact: Relay, SPDT (Single Pole Double Throw)

      • Maximum Load Current: 5 A @ 250 V AC

      • Response Time: ≤ 2 s

      • Operating Temperature: -20°C ~ +60°C

      • Storage Temperature: -40°C ~ +85°C

      • Mounting: DIN rail

      • Dimensions (H×W×D): ~90 × 22.5 × 110 mm

      • Protection Class: IP20

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      3. Features & Advantages

      1. High-precision temperature monitoring — Monitors motor windings or equipment temperature in real time using PT100/NTC/PTC sensors.

      2. Flexible alarm and control — Adjustable threshold for alarm or relay output to control fans, heaters, or alert systems.

      3. Easy installation — Standard DIN rail mounting for quick deployment in control panels.

      4. Wide compatibility — Supports multiple sensor types (PTC, NTC, PT100).

      5. High reliability — IP20 rated, suitable for industrial environments with strong interference resistance.

      6. Multi-function display — Shows current temperature status for easy monitoring and setup.

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      4. Typical Applications

      • Motor winding temperature monitoring and protection

      • Transformer temperature protection

      • Critical equipment monitoring in industrial control systems

      • Overheat protection for fans, pumps, compressors

      • Power, building, and automation control systems

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      5. Precautions

      • Ensure supply voltage matches relay specifications before installation.

      • Confirm thermistor type and wiring to avoid inaccurate readings or false trips.

      • Avoid installation in high humidity, corrosive, or strong electromagnetic interference environments; use protective covers if necessary.

      • Regularly inspect sensors and relay to ensure normal operation.

      • Set temperature thresholds according to the rated equipment temperature to prevent false trips or delayed protection.

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