Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SVR740700R0100 ABB CM-MSS.12P Thermistor Motor Protection Relay
ABB CM-MSS.12P thermistor motor protection relay 1SVR740700R0100 with one PTC sensor circuit, automatic reset, 24 V AC/DC control supply, one changeover output contact and push-in terminals.
£53.98
Why Choose the ABB CM-MSS.12P Thermistor Motor Protection Relay?
The ABB CM-MSS.12P is a compact and reliable thermistor motor protection relay designed to monitor motor winding temperature using PTC thermistor sensors. Supplied under ABB order code 1SVR740700R0100, it belongs to the ABB CM-MSS thermistor motor protection relay series and provides dependable protection against motor overheating caused by overload, excessive operating temperatures or insufficient cooling.
The CM-MSS.12P monitors one PTC sensor circuit and operates with automatic reset functionality. When the connected thermistors indicate excessive motor winding temperature, the relay changes the state of its output contact so that an alarm, contactor or other control circuit can respond appropriately.
Designed for a 24 V AC/DC control supply, the CM-MSS.12P provides one changeover (SPDT) output contact. Its compact 22.5 mm housing and push-in screwless terminals make it particularly convenient for installation in industrial control panels, motor control centres and machinery.
Key Advantages
- Reliable PTC thermistor motor temperature monitoring.
- Protects motors against overheating, overload and insufficient cooling.
- One sensor circuit for motor PTC thermistors.
- Automatic reset functionality for straightforward protection circuits.
- 24 V AC/DC control supply suitable for common industrial control systems.
- One changeover (SPDT) output contact for signalling or control.
- Push-in screwless terminals simplify panel wiring.
- Slim 22.5 mm housing conserves DIN rail space.
Key Features
- ABB CM-MSS thermistor motor protection relay series.
- ABB order code 1SVR740700R0100.
- Designed for PTC thermistor motor protection.
- One PTC sensor circuit.
- Automatic reset operating function.
- 24 V AC/DC rated control supply voltage.
- 1 c/o (SPDT) relay output.
- Two LED indicators for operating status indication.
- Push-in / screwless terminal technology.
- Operating ambient temperature range of -25 to +60 °C.
- Compact DIN rail format for industrial control panels.
Reliable PTC Thermistor Protection for Electric Motors
PTC thermistors embedded in motor windings respond directly to increases in winding temperature. The ABB CM-MSS.12P evaluates the connected thermistor circuit and changes its relay output when the motor reaches the thermistor response temperature, enabling the associated control system to stop the motor or provide an alarm.
This direct temperature monitoring helps protect motors against thermal conditions that conventional current-based overload protection may not detect alone, including restricted cooling, excessive ambient temperature and frequent starting. The CM-MSS series is therefore well suited to industrial motor protection systems where dependable thermal supervision is required.
Typical Applications
- Three-phase industrial motors equipped with PTC thermistors.
- 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.
Technical Specifications
Tick the specs you need, then view products that match.
| Reset Type | Automatic | |
|---|---|---|
| Monitoring Function | Temperature / thermistor | |
| Series | CM-MSS | |
| ABB order code | 1SVR740700R0100 | |
| Product group | 310921-Measuring & Monitoring Relays | |
| Product type | Thermistor motor protection relay | |
| Sensor type | PTC thermistor | |
| Number of sensor circuits | 1 | |
| Reset function | Automatic | |
| Rated control supply voltage | 24 V AC/DC | |
| Output | 1 changeover (SPDT) contact | |
| Number of LEDs | 2 | |
| Connection technology | Push-in / screwless terminals | |
| Maximum output circuit operating voltage (UL/CSA) | 300 V AC | |
| UL/CSA contact rating | B300 | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Width | 22.5 mm | |
| Height | 85.6 mm | |
| Depth | 103.7 mm | |
| Net weight | approx. 0.105 kg | |
| EAN / UPC | 4013614496615 |
Frequently Asked Questions
What is the ABB CM-MSS.12P used for?
The CM-MSS.12P is used to monitor PTC thermistors installed in electric motor windings, helping protect motors against overheating, overload and insufficient cooling.
How many thermistor sensor circuits does the CM-MSS.12P have?
The CM-MSS.12P provides one PTC thermistor sensor circuit for motor temperature monitoring.
What supply voltage does the CM-MSS.12P require?
The CM-MSS.12P operates from a 24 V AC/DC control supply.
What output does the CM-MSS.12P provide?
The relay provides one changeover (SPDT) output contact that can be incorporated into motor shutdown, alarm or control circuits.
What type of terminals does the CM-MSS.12P use?
The CM-MSS.12P uses push-in screwless terminals, supporting fast and convenient wiring in industrial control panels.
Trusted ABB Motor Protection Technology
ABB CM-MSS thermistor motor protection relays provide dependable PTC temperature monitoring to help protect industrial motors against excessive winding temperatures and support reliable machinery operation.
