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1SVR740712R1300 ABB CM-MSS.51P Thermistor Motor Protection Relay
ABB CM-MSS.51P thermistor motor protection relay 1SVR740712R1300 with two PTC sensor circuits, configurable single or accumulative evaluation, 24–240 V AC/DC supply and configurable changeover outputs.
£132.02
Why Choose the ABB CM-MSS.51P Thermistor Motor Protection Relay?
The ABB CM-MSS.51P is a configurable thermistor motor protection relay designed for monitoring PTC temperature sensors embedded in electric motor windings. Supplied under ABB order code 1SVR740712R1300, it belongs to the ABB CM-MSS thermistor motor protection relay series and provides direct thermal supervision to help protect motors against excessive winding temperatures.
The CM-MSS.51P features two sensor circuits and supports configurable single or accumulative evaluation. Additional monitoring functions include configurable short-circuit detection, dynamic interrupted-wire detection and configurable non-volatile fault storage, providing comprehensive supervision of both motor temperature and the connected thermistor circuits.
Operating from a wide 24–240 V AC/DC control supply, the CM-MSS.51P provides configurable outputs as 2 × 1 changeover or 1 × 2 changeover contacts. Automatic, manual and remote reset options, ATEX approval and maintenance-free Easy Connect push-in terminals make it well suited to demanding industrial motor protection applications.
Key Advantages
- Reliable PTC thermistor motor temperature monitoring.
- Two sensor circuits provide flexible motor temperature supervision.
- Configurable single or accumulative sensor evaluation.
- Configurable short-circuit detection supervises the thermistor circuits.
- Dynamic interrupted-wire detection helps identify sensor wiring faults.
- Configurable non-volatile fault storage retains fault information when required.
- Supports automatic, manual or remote reset.
- Wide 24–240 V AC/DC control supply simplifies integration.
- Configurable 2 × 1 c/o or 1 × 2 c/o output contacts.
- ATEX-approved thermistor motor protection functionality.
- Easy Connect push-in screwless terminals simplify panel wiring.
Key Features
- ABB CM-MSS thermistor motor protection relay series.
- ABB order code 1SVR740712R1300.
- Two PTC sensor circuits.
- Single or accumulative evaluation, configurable.
- Short-circuit detection, configurable.
- Dynamic interrupted-wire detection.
- Non-volatile fault storage, configurable.
- Automatic, manual or remote reset.
- Integrated reset / test functionality.
- 24–240 V AC/DC rated control supply voltage.
- Configurable 2 × 1 c/o or 1 × 2 c/o contacts.
- Output contacts rated at 250 V / 4 A.
- ATEX approved.
- Maintenance-free Easy Connect push-in terminals.
- Compact 22.5 mm DIN rail housing.
Advanced PTC Thermistor Protection for Electric Motors
PTC temperature sensors installed within motor windings provide direct thermal monitoring by changing resistance as the winding temperature reaches the sensor response point. The ABB CM-MSS.51P evaluates two sensor circuits and changes its relay outputs when an overtemperature or monitored sensor-circuit fault condition occurs, allowing the associated control system to initiate an alarm or motor shutdown.
The configurable single or accumulative evaluation mode enables the two sensor circuits to be adapted to different protection requirements. Combined with short-circuit detection, interrupted-wire monitoring, fault storage and flexible reset options, the CM-MSS.51P provides comprehensive thermal protection and diagnostic functionality for industrial motors.
Typical Applications
- Industrial motors equipped with PTC temperature sensors.
- Motors requiring two independent temperature sensor circuits.
- Pumps, fans and ventilation equipment.
- Compressors and refrigeration machinery.
- Conveyors and material handling systems.
- Machine tools and production machinery.
- Motor control centres and electrical control panels.
- Industrial installations requiring ATEX-approved thermistor motor protection.
Technical Specifications
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| Reset Type | Manual or automatic | |
|---|---|---|
| Monitoring Function | Temperature / thermistor | |
| Series | CM-MSS | |
| ABB order code | 1SVR740712R1300 | |
| Product group | 310921-Measuring & Monitoring Relays | |
| Product type | Thermistor motor protection relay | |
| Sensor type | PTC temperature sensors | |
| Number of sensor circuits | 2 | |
| Sensor evaluation | Single or accumulative, configurable | |
| Short-circuit detection | Configurable | |
| Interrupted-wire detection | Dynamic | |
| Fault storage | Configurable, non-volatile | |
| Reset functions | Automatic, manual or remote | |
| Reset / test button | Yes | |
| Rated control supply voltage | 24–240 V AC/DC | |
| Outputs | 2 × 1 c/o or 1 × 2 c/o contacts, configurable | |
| Output contact rating | 250 V / 4 A | |
| Maximum operating voltage UL/CSA | 300 V AC output circuit | |
| UL/CSA contact rating | B300 | |
| Terminal type | Screwless push-in terminals | |
| Approval | ATEX approved | |
| Protection rating | IP50 | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Mounting | DIN rail | |
| Width | 22.5 mm | |
| Height | 85.6 mm | |
| Depth | 103.7 mm | |
| Net weight | approx. 0.135 kg | |
| EAN | 4013614496554 |
Frequently Asked Questions
What is the ABB CM-MSS.51P used for?
The CM-MSS.51P is used to monitor PTC temperature sensors in electric motors, helping protect motor windings against excessive temperatures while also supervising the connected sensor circuits.
How many sensor circuits does the CM-MSS.51P have?
The CM-MSS.51P has two sensor circuits with configurable single or accumulative evaluation.
What supply voltage does the CM-MSS.51P require?
The CM-MSS.51P operates from a wide 24–240 V AC/DC control supply.
What outputs does the CM-MSS.51P provide?
The relay outputs can be configured as 2 × 1 changeover contacts or 1 × 2 changeover contacts, providing flexibility for motor shutdown and signalling circuits.
Can the CM-MSS.51P detect thermistor wiring faults?
Yes. The CM-MSS.51P provides configurable short-circuit detection and dynamic interrupted-wire detection for supervision of its sensor circuits.
Trusted ABB Motor Protection Technology
ABB CM-MSS thermistor motor protection relays provide dependable PTC temperature monitoring, sensor-circuit supervision and configurable control functions for protecting electric motors in industrial machinery and automation systems.
