ABB 1SVR730712R2200 Thermistor Relay

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1. Product Overview

The ABB 1SVR730712R2200 is a thermistor temperature monitoring relay from the ABB CM‑MSS series. It monitors PTC thermistor sensors in motor windings or other equipment. If overtemperature or sensor fault (open/short circuit) is detected, the relay triggers protective action. Supports automatic, manual, or remote reset modes and is suitable for DIN rail mounting in industrial control systems.

2. Technical Specifications

• Model: 1SVR730712R2200

• Series: CM‑MSS

• Function: Thermistor / Temperature Monitoring Relay

• Supply Voltage: 110–130 V AC or 220–240 V AC, 50/60 Hz

• Output Contacts: 2 × SPDT (changeover)

• Contact Rating: Max 250 V AC / 4 A

• Sensor Type: PTC thermistor

• Sensor Circuit Monitoring: Detects open and short circuit

• Reset Modes: Automatic / Manual / Remote

• Mounting: DIN rail

• Terminal Type: Screw terminals

• Operating Temperature: ‑25 °C to +60 °C

• Storage Temperature: ‑40 °C to +85 °C

• Width: 22.5 mm

• Dimensions (L×W×H): 103.7 × 22.5 × 85.6 mm

• Certifications: Optional ATEX for hazardous areas

3. Key Advantages & Features

1. Reliable Temperature Monitoring – Accurately monitors PTC sensors to detect overheating.

2. Wide Voltage Adaptation – Compatible with 110–130 V AC and 220–240 V AC systems.

3. Multiple Reset Options – Automatic, manual, or remote reset for flexible control.

4. DIN Rail Mounting – Modular design for easy panel installation.

5. Compact Design – 22.5 mm module width saves space.

6. Sensor Fault Detection – Monitors open or shorted thermistor circuits.

7. Optional ATEX Certification – Suitable for hazardous areas.

4. Typical Applications

• Motor winding temperature monitoring and protection

• Industrial equipment overtemperature protection

• Temperature alarm in distribution panels and control cabinets

• HVAC system temperature monitoring

• Motor protection in hazardous areas (ATEX optional)

5. Installation & Usage Notes

1. Match Supply Voltage – Ensure relay voltage matches rated supply.

2. Proper Sensor Wiring – Connect PTC thermistor correctly to avoid false alarms.

3. Environmental Conditions – Avoid high humidity, dust, or corrosive atmospheres.

4. Reset Configuration – Set automatic, manual, or remote reset based on system design.

5. Regular Inspection – Periodically check relay and sensor wiring for reliability.