Why Choose the ABB CM-ESS.1S Voltage Monitoring Relay?
The ABB CM-ESS.1S (1SVR730831R1300) is a compact and reliable single-phase voltage monitoring relay designed to detect overvoltage and undervoltage conditions in industrial electrical systems. As part of the ABB CM-ESS voltage monitoring relay series, it provides dependable voltage supervision for electrical equipment, control circuits and industrial automation applications requiring accurate monitoring and fault detection.
This monitoring relay features True RMS voltage measurement for AC and DC voltages, with four selectable measuring ranges covering 3–600 V. Its configurable overvoltage and undervoltage monitoring functions, adjustable switching threshold and hysteresis allow engineers to adapt the relay to different operating requirements. An integrated changeover output contact provides reliable signalling and straightforward integration with industrial control systems.
With a rated control supply voltage of 220–240 V AC and four selectable measuring ranges of 3–30 V, 6–60 V, 30–300 V and 60–600 V, the CM-ESS.1S is suitable for monitoring voltage conditions in electrical installations, machinery and automation equipment. Its compact 22.5 mm housing and DIN rail mounting design enable straightforward installation inside electrical control panels and distribution cabinets.
Key Advantages
- Reliable single-phase voltage monitoring relay for industrial electrical systems.
- 220–240 V AC control supply suitable for standard industrial control circuits.
- Four selectable voltage measuring ranges covering 3–600 V AC/DC.
- Configurable overvoltage and undervoltage monitoring functions.
- True RMS measuring principle for dependable AC and DC voltage supervision.
- Integrated changeover (SPDT) output contact rated at 250 V / 4 A.
- Adjustable hysteresis from 3–30% helps prevent unwanted switching around the threshold.
- Front-mounted adjustment controls simplify configuration and commissioning.
- LED indicators provide convenient visual operating status information.
- Compact DIN rail mounting design helps conserve space inside electrical control cabinets.
- Secure screw terminal connections simplify installation and maintenance.
Key Features
- ABB CM-ESS single-phase voltage monitoring relay series.
- Manufacturer part number: 1SVR730831R1300.
- 220–240 V AC rated control supply voltage.
- Four selectable voltage measuring ranges: 3–30 V, 6–60 V, 30–300 V and 60–600 V.
- True RMS measurement for AC and DC voltages.
- Selectable overvoltage or undervoltage monitoring.
- Adjustable hysteresis: 3–30% of the threshold value.
- One changeover (SPDT) output contact rated at 250 V / 4 A.
- Open-circuit operating principle.
- Three LED indicators for operating status indication.
- Front-face controls for measuring range, threshold and hysteresis adjustment.
- Double-chamber cage connection terminals with screw connections.
- 22.5 mm housing width for space-efficient installation.
- Tool-free mounting and removal from DIN rails.
- Optional sealable transparent cover for protection against unauthorised adjustments.
Technical Specifications
- Manufacturer: ABB
- Series: CM-ESS Voltage Monitoring Relays
- Model: CM-ESS.1S
- ABB order code: 1SVR730831R1300
- ABB product group: 310921-Measuring & Monitoring Relays
- Product type: Single-phase voltage monitoring relay
- Rated control supply voltage: 220–240 V AC
- Monitoring function: Overvoltage or undervoltage
- Measuring principle: True RMS measurement for AC and DC voltages
- Measuring range 1: 3–30 V
- Measuring range 2: 6–60 V
- Measuring range 3: 30–300 V
- Measuring range 4: 60–600 V
- Hysteresis: Adjustable, 3–30% of threshold value
- Output contacts: 1 changeover (SPDT) contact
- Contact rating: 250 V / 4 A
- Rated operational current AC-12: 4 A at 230 V
- Rated operational current AC-15: 3 A at 230 V
- Rated operational current DC-12: 4 A at 24 V
- Rated operational current DC-13: 2 A at 24 V
- Minimum switching capacity: 24 V / 10 mA
- Operating principle: Open-circuit principle
- Status indication: 3 LEDs
- Terminal type: Screw terminals with double-chamber cage connections
- Terminal tightening torque: 0.6–0.8 N·m
- Wire stripping length: 8 mm
- Protection rating: IP50 housing / IP20 terminals
- Overvoltage category: III
- Pollution degree: 3
- Mounting type: DIN rail mounting
- Operating ambient temperature: −20 to +60 °C
- Storage temperature: −40 to +85 °C
- Dimensions (H × W × D): 85.6 × 22.5 × 103.7 mm
- Net weight: 0.164 kg
- EAN: 4016779852203
Reliable Voltage Monitoring for Industrial Electrical Systems
Voltage monitoring relays such as the ABB CM-ESS.1S continuously supervise electrical voltage and respond when the measured value crosses a configured threshold. By detecting overvoltage or undervoltage conditions, the relay helps identify abnormal supply conditions that could affect the performance, reliability or service life of connected electrical equipment.
The CM-ESS.1S uses True RMS measurement to monitor AC and DC voltages across four selectable ranges. Engineers can configure the operating mode, voltage threshold and hysteresis to match the requirements of the monitored circuit. When the configured switching conditions are met, the relay changes the state of its output contact, allowing connected control systems to activate alarms, initiate shutdown sequences or perform other protective actions.
Its single changeover contact enables integration with PLC inputs, contactor control circuits and industrial alarm systems. The adjustable hysteresis helps prevent repeated switching when the monitored voltage fluctuates close to the configured threshold. The compact DIN rail housing, front-mounted controls and visual status indicators make the CM-ESS.1S a practical solution for voltage supervision in industrial automation and electrical distribution systems.
Typical Applications
- Industrial single-phase voltage monitoring and supervision.
- Overvoltage and undervoltage detection in electrical control circuits.
- AC and DC voltage monitoring in industrial equipment.
- Electrical supply monitoring for machinery and automation systems.
- Voltage supervision in control panels and distribution cabinets.
- PLC-based monitoring and alarm signalling applications.
- Power supply condition monitoring for industrial control equipment.
- Electrical fault detection in manufacturing and production machinery.
- OEM machine building and automated control systems.
- Industrial electrical maintenance and condition monitoring applications.
