CM-ESS.2S

Name: CM-ESS.2S
Brand: ABB
SKU: CM-ESS.2S

The ABB CM-ESS.2S is an electronic voltage monitoring relay that monitors AC/DC voltages (3-600 V) with adjustable hysteresis and tripping delay. It features two terminal versions and includes 4 measuring ranges for precise voltage detection.

Product ModelCM-ESS.2S

Material Number1SVR730831R0400

Product ID84270

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable Voltage MonitoringThe ABB CM-ESS.2S provides reliable monitoring of AC/DC voltages, ensuring accurate detection of over- or undervoltages and phase loss. Its TRMS measuring principle ensures precise measurements within the rated control supply voltage tolerance.
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2. Adjustable Hysteresis and Tripping DelayThe device allows for adjustable hysteresis (3-30 %) and tripping delay (0 s to 30 s), providing customizable settings to suit various application requirements. This flexibility ensures that the relay can be tailored to specific voltage monitoring needs.
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3. Versatile Terminal OptionsThe CM-ESS.2S is available in two terminal versions: screw connection technology and Easy Connect Technology (push-in terminals). This versatility allows users to choose the most convenient and reliable connection method for their setup.
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4. High Fire Protection ClassificationThe housing material of the CM-ESS.2S is classified as UL 94 V-0, ensuring the highest fire protection standards. This feature is crucial in environments where fire safety is a top priority.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

22.5 mm

Product Net Height

85.6 mm

Product Net Depth / Length

103.7 mm

Product Net Weight

0.181 kg

Function

Over- or undervoltage monitoring

Measuring Range

3 ... 30 V 6 ... 60 V 30 ... 300 V 60 ... 600 V

5. Durable and Tool-Free MountingThe device can be tool-free mounted on DIN rail, making installation and demounting effortless. Its durable design ensures long-lasting performance in various operational temperatures (-20°C to +60°C).

6. Precise Adjustment and IndicationThe CM-ESS.2S features front-face operating controls for precise adjustment of the measuring range, hysteresis, and tripping delay. It also includes LEDs for indication of operational states, ensuring easy monitoring of the device's status.

7. Transient Overvoltage ProtectionThe relay includes transient overvoltage protection varistors, which safeguard the device against sudden voltage spikes. This feature enhances the overall reliability and longevity of the CM-ESS.2S.

8. Electrical Connection CapabilitiesThe device supports various electrical connections, including fine-strand and rigid wires, with a maximum capacity of 800 V for pulse overload and 660 V continuous capacity. This versatility ensures compatibility with a wide range of electrical configurations.

9. Long Electrical LifetimeThe CM-ESS.2S is designed to withstand a high number of switching cycles (up to 12 million cycles at 12 V AC and 4 A). This durability ensures that the device remains reliable over an extended period, reducing the need for frequent replacements.

10. Compliance with International StandardsThe CM-ESS.2S complies with international standards for electrical safety and performance, making it suitable for use in a variety of applications worldwide. Its IP50 housing and IP20 terminals ensure protection against dust and water, enhancing its overall reliability in harsh environments.

Time Range

0 s or 0.1 ... 30 s tripping delay (ON)

Rated Control Supply Voltage (Us)

110 ... 130 V AC

Output

2 c/o (SPDT) contacts

Terminal Type

Screw Terminals

Rated Operational Current AC-12 (Ie)

(230 V) 4 A

Rated Operational Current AC-15 (Ie)

(230 V) 3 A

Rated Operational Current DC-12 (Ie)

(24 V) 4 A

Rated Operational Current DC-13 (Ie)

(24 V) 2 A

Minimum Switching Capacity

24 V 10 mA

Rated Impulse Withstand Voltage (Uimp)

Measuring Circuit / Output Circuit 6 kV Output Circuit 1 / Output Circuit 2 4 kV Supply Circuit / Measuring Circuit 6 kV Supply Circuit / Output Circuit 4 kV

Rated Insulation Voltage (Ui)

Measuring Circuit / Output Circuit 600 V Output Circuit 1 / Output Circuit 2 250 V Supply Circuit / Measuring Circuit 600 V Supply Circuit / Output Circuit 250 V

Degree of Protection

Housing IP50 Terminals IP20

Overvoltage Category

III

Pollution Degree

Short-Circuit Protective Devices

Output Circuit NC - F Type Fuses 10 A Output Circuit NO - F Type Fuses 10 A

Electrical Durability

AC-12 100000 cycle

Mechanical Durability

30000000 cycle

Connecting Capacity

Flexible with Ferrule 1x 0.5 ... 2.5 mmÂ² Flexible with Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mmÂ² Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mmÂ² Flexible 1x 0.5 ... 2.5 mmÂ² Flexible 2x 0.5 ... 1.5 mmÂ² Rigid 1x 0.5 ... 4 mmÂ² Rigid 2x 0.5 ... 2.5 mmÂ²

Tightening Torque

0.6 ... 0.8 NÂ·m

Wire Stripping Length

8 mm

Recommended Screw Driver

0.8 x 4 4.5 Pozidriv 1

Mounting Position

1 ... 6

Mounting on DIN Rail

TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715

Standards

CAN/CSA C22.2 No.14 IEC/EN 63000 IEC/EN 60255-27 IEC/EN 61000-6-2 IEC/EN 61000-6-3 UL 508

Maximum Operating Voltage UL/CSA

Output Circuit 300 V AC

Contact Rating UL/CSA

B300

Connecting Capacity UL/CSA

Flexible 1x 18-14 AWG Flexible 2x 18-16 AWG Rigid 1x 20-12 AWG Rigid 2x 20-14 AWG

Tightening Torque UL/CSA

7.08 inÂ·lb

Pilot Duty UL/CSA

B300

Flammability According to UL94

V-0

Ambient Air Temperature

Operation -20 ... +60 Â°C Storage -40 ... +85 Â°C

Maximum Operating Altitude Permissible

Without Derating 2000 m

Object Classification Code

ETIM 7

EC001438 - Voltage monitoring relay

ETIM 8

EC001438 - Voltage monitoring relay

ETIM 9

EC001438 - Voltage monitoring relay

eClass

V11.0 : 27371801

UNSPSC

39122332

E-Number (Finland)

2712251

E-Number (Norway)

4188086

E-Number (Sweden)

3860622

Manufacturer ID

1SVR730831R0400