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1SVR730840R0300 ABB CM-SRS.12S Current Monitoring Relay 24–240 V AC/DC
ABB CM-SRS.12S current monitoring relay 1SVR730840R0300 with a 24–240 V AC/DC control supply, three selectable 0.3–15 A RMS measuring ranges, configurable overcurrent or undercurrent monitoring and one changeover output contact.
£135.71
Why Choose the ABB CM-SRS.12S Current Monitoring Relay?
The ABB CM-SRS.12S is a compact and reliable single-phase current monitoring relay designed for overcurrent or undercurrent supervision in industrial control and automation systems. With ABB order code 1SVR730840R0300, this CM-SRS series relay operates from a wide 24–240 V AC/DC control supply and monitors both AC and DC currents using an RMS measuring principle.
The CM-SRS.12S provides three selectable measuring ranges of 0.3–1.5 A, 1–5 A and 3–15 A. It can be configured for either overcurrent or undercurrent monitoring, while adjustable hysteresis from 3–30% of the selected threshold value enables reliable switching behaviour matched to the application.
A single changeover (SPDT) output contact rated at 250 V / 4 A provides straightforward integration with contactors, PLC inputs, alarms and other control circuits. Screw connection technology with double-chamber cage terminals and a compact 22.5 mm housing make the CM-SRS.12S particularly suitable for space-conscious DIN-rail installations.
Key Advantages
- Reliable overcurrent or undercurrent monitoring for single-phase electrical systems.
- Wide 24–240 V AC/DC control supply supports diverse industrial applications.
- Three selectable measuring ranges covering 0.3–15 A.
- RMS measuring principle supports AC and DC current monitoring.
- Adjustable 3–30% hysteresis for application-specific switching behaviour.
- 1 c/o (SPDT) output contact for control and signalling circuits.
- Compact 22.5 mm-wide housing conserves DIN-rail space.
- Screw terminals provide secure and convenient field wiring.
Key Features
- ABB CM-SRS single-phase current monitoring relay series.
- 24–240 V AC/DC rated control supply voltage.
- Configurable overcurrent or undercurrent monitoring.
- Selectable measuring ranges of 0.3–1.5 A, 1–5 A and 3–15 A.
- RMS measuring principle for AC and DC currents.
- 3–30% adjustable hysteresis.
- 1 c/o (SPDT) relay output.
- 250 V / 4 A output contact rating.
- Open-circuit operating principle.
- Three LEDs for operating-status indication.
- Screw connection technology with double-chamber cage terminals.
- Compact DIN-rail mounting format.
Reliable Current Monitoring for Industrial Control Systems
Current monitoring relays help protect machinery and electrical systems by detecting current levels outside defined operating limits. The ABB CM-SRS.12S can be configured for either overcurrent or undercurrent monitoring, allowing excessive loads, loss of load and other current-related operating conditions to be detected through the associated control circuit.
Its three selectable measuring ranges enable current monitoring from 0.3 A up to 15 A, while RMS measurement provides dependable supervision of both AC and DC currents. Adjustable hysteresis helps prevent unwanted relay cycling close to the selected threshold, making the CM-SRS.12S suitable for reliable machine and process monitoring.
Typical Applications
- Industrial control and automation panels.
- AC and DC current supervision.
- Machine load and operating-state monitoring.
- Motor and actuator control circuits.
- Pump, fan and process equipment monitoring.
- Electrical distribution and control systems.
- Alarm and signalling circuits.
- OEM machinery and production equipment.
Technical Specifications
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| Signal / Input Range | 0.3–1.5 A | |
|---|---|---|
| Monitored Supply | Single-phase | |
| Monitoring Function | Current | |
| Series | CM-SRS | |
| ABB order code | 1SVR730840R0300 | |
| Product type | Single-phase current monitoring relay | |
| Monitoring function | Overcurrent or undercurrent | |
| Rated control supply voltage | 24–240 V AC/DC | |
| Measuring range 1 | 0.3–1.5 A | |
| Measuring range 2 | 1–5 A | |
| Measuring range 3 | 3–15 A | |
| Measuring principle | RMS for AC and DC currents | |
| Hysteresis | Adjustable 3–30% of threshold value | |
| Output | 1 c/o (SPDT) contact | |
| Output contact rating | 250 V / 4 A | |
| Operating principle | Open-circuit principle | |
| Terminal type | Screw terminals | |
| Protection rating | IP50 housing / IP20 terminals | |
| Mounting | DIN rail | |
| Operating temperature | -20 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Width | 22.5 mm | |
| Height | 85.6 mm | |
| Depth | 103.7 mm | |
| Net weight | 0.137 kg | |
| EAN | 4016779852234 |
Frequently Asked Questions
What is the ABB CM-SRS.12S 1SVR730840R0300 used for?
The ABB CM-SRS.12S is used for configurable overcurrent or undercurrent monitoring of AC and DC currents in industrial electrical and automation systems.
What supply voltage does the CM-SRS.12S require?
ABB order code 1SVR730840R0300 operates from a wide 24–240 V AC/DC rated control supply.
What current ranges can the CM-SRS.12S monitor?
The relay provides three selectable measuring ranges: 0.3–1.5 A, 1–5 A and 3–15 A.
Can the CM-SRS.12S monitor both AC and DC current?
Yes. The CM-SRS.12S uses an RMS measuring principle and is designed for monitoring both AC and DC currents.
What output does the CM-SRS.12S provide?
The relay provides one changeover (SPDT) output contact rated at 250 V / 4 A for connection to control, alarm and signalling circuits.
Trusted ABB Monitoring Technology
ABB CM-SRS monitoring relays provide dependable current supervision for industrial automation and electrical control applications, combining flexible AC/DC measurement, adjustable switching parameters and compact DIN-rail installation.
