Why Choose the ABB CM-ESS.1S Voltage Monitoring Relay?
The ABB CM-ESS.1S is a compact and reliable single-phase voltage monitoring relay designed for overvoltage or undervoltage supervision in industrial control and automation systems. With ABB order code 1SVR730831R0300, this CM-ESS series relay operates with a rated control supply voltage of 110–130 V AC and provides dependable monitoring of AC and DC measuring voltages.
The CM-ESS.1S provides four selectable measuring ranges covering 3–30 V, 6–60 V, 30–300 V and 60–600 V. It can be configured for either overvoltage or undervoltage monitoring, while adjustable hysteresis from 3–30% of the threshold value enables the switching behaviour to be matched to the requirements of 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 terminals and a compact 22.5 mm housing make the CM-ESS.1S well suited to space-conscious DIN-rail installations in industrial electrical panels.
Key Advantages
- Reliable overvoltage or undervoltage monitoring for electrical systems.
- 110–130 V AC rated control supply for industrial control applications.
- Four selectable measuring ranges covering 3–600 V.
- RMS measuring principle suitable for AC and DC measuring voltages.
- Adjustable 3–30% hysteresis for application-specific switching behaviour.
- 1 c/o (SPDT) output contact rated at 250 V / 4 A.
- Compact 22.5 mm-wide housing conserves DIN-rail space.
- Screw terminals provide secure and convenient field wiring.
Key Features
- ABB CM-ESS single-phase voltage monitoring relay series.
- 110–130 V AC rated control supply voltage.
- Configurable overvoltage or undervoltage monitoring.
- Selectable measuring ranges of 3–30 V, 6–60 V, 30–300 V and 60–600 V.
- RMS measuring principle for AC and DC voltages.
- 3–30% adjustable hysteresis.
- 1 c/o (SPDT) relay output.
- 250 V / 4 A output contact rating.
- Open-circuit operating principle.
- Housing protection rated IP50 with IP20 terminals.
- Screw connection technology.
- Compact DIN-rail mounting format.
Reliable Voltage Monitoring for Industrial Control Systems
Voltage monitoring relays help protect electrical equipment and automated processes against supply conditions outside acceptable operating limits. The ABB CM-ESS.1S can be configured to detect either excessive or insufficient voltage and change the state of its relay output when the selected threshold is crossed.
Its four selectable measuring ranges provide flexibility for applications ranging from low-voltage control circuits through to voltages of 600 V. Adjustable hysteresis helps prevent unwanted relay cycling around the switching threshold, while the compact DIN-rail housing simplifies integration into industrial control and electrical distribution panels.
Typical Applications
- Industrial control and automation panels.
- AC and DC voltage supervision.
- Machine control and protection circuits.
- Power supply monitoring systems.
- Motor control and process equipment.
- Electrical distribution and control systems.
- Alarm and signalling circuits.
- OEM machinery and production equipment.
