1SVR730700R2200: CM-MSS.23S motor protection: PTC loop, reset logic and contactor response
ABB CM-MSS.23S is a thermistor motor-protection relay with order code 1SVR730700R2200. ABB catalog specifications identify one PTC sensor circuit, two changeover outputs, automatic/manual/remote reset options and a 110–130/220–240 V AC supply variant. The relay monitors the PTC circuit; motor overload and short-circuit protection remain separate functions in the motor starter design.
Key technical data
| Technical item | Verified value / selection note |
|---|---|
| ABB order code | 1SVR730700R2200 |
| Type | CM-MSS.23S thermistor motor-protection relay |
| Sensor circuits | One PTC sensor circuit |
| Supply | 110–130 V AC / 220–240 V AC variant |
| Reset | Automatic, manual or remote reset options per specification |
| Outputs | 2 c/o (SPDT) contacts |
| Operating temperature | -25 to +60 °C family specification |
Field verification sequence
- Confirm the complete device identity and supply.
- Check terminal, bus and accessory compatibility.
- Test normal, fault and recovery behavior before handover.
Selection and compatibility checks
For 1SVR730700R2200, check the AC supply variant, sensor-loop continuity, reset method, output logic and the contactor or PLC input being controlled. Confirm the PTC resistance and trip/reset characteristics from ABB documentation. Do not use the relay as the only motor-protection device; coordinate it with overload and short-circuit protection.
Role in the control or protection system
CM-MSS.23S is applied where a motor winding PTC chain is used to signal excessive temperature to a control or shutdown circuit. The sensor loop must match the relay's input behavior and the motor manufacturer's sensor arrangement. Decide whether reset is automatic, local or remote based on the process and restart risk.
For 1SVR730700R2200, establish the equipment boundary before procurement: record the host controller or panel, the connected field device, the installed hardware and firmware revisions, the supply source, the protection method and the required operating sequence. A family-name match is not enough to confirm that 1SVR730700R2200 is a compatible replacement. Check all interfaces and accessories against the exact ABB documentation.
Commissioning and acceptance
Test CM-MSS.23S by simulating a valid sensor condition and an overtemperature/open-circuit condition using an approved method. Verify that the output drops or changes state as designed and that a reset cannot restart a hazardous motor unexpectedly. Record the sensor circuit and reset behavior.
A practical acceptance record for 1SVR730700R2200 should include the nameplate photograph, order code, terminal and connector condition, configuration or setting values, software revision where applicable, test equipment and measured results. If 1SVR730700R2200 is installed as part of a larger system, record the system-level response as well as the local device indication.
Related same-series designations
These 1SVR730700R2200 references identify related options or configurations, not automatic substitutes. Check each complete model code, ratings, connection method and compatibility before selection.
No additional same-series reference was selected for 1SVR730700R2200; confirm the complete designation and suffix before ordering.
Procurement and maintenance handover
When requesting a quotation for 1SVR730700R2200, provide the full designation, ABB order number, quantity, installed revision, application voltage, connected load or field-device type, required approvals and delivery destination. Ask the supplier to confirm that the supplied 1SVR730700R2200 matches the stated hardware and accessory configuration. Do not substitute a neighboring family code without engineering review.
