ABB 1SVR740831R0400 CM-ESS.2P Voltage Relay - CE/UL
Part Number: 1SVR740831R0400
Quick Summary
ABB CM-ESS.2P voltage monitoring relay is a precise over- and undervoltage protector for single-phase control panels and machines. Engineers frequently contend with nuisance trips and voltage faults that disrupt production and shorten equipment life. It carries CE and UKCA conformity along with UL/cUL recognition for industrial safety and compliance. Built for DIN rail mounting with Easy Connect push-in terminals, this device reduces commissioning time while improving wiring reliability and overall plant efficiency. The compact form factor and robust measurement across 3-600 V ranges also support future-proofing of small- to mid-size electrical panels. With configurable trip delays and hysteresis, it adapts to fast-protect or steady-state monitoring, helping teams meet safety standards and minimize downtime.
Product Information
Extended Description
1SVR740831R0400 ABB: The CM-ESS.2P is a single-functional voltage monitoring relay from the CM single-phase monitors range. This monitoring relay operates with a rated control supply voltage of 110 - 130 V AC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC voltages with 4 measuring ranges: 3-30 V, 6-60 V, 30-300 V and 60-600 V and works according to the open-circuit principle. The CM-ESS.2P is configurable for over- or undervoltage monitoring. The hysteresis is adjustable within a range of 3 to 30 % of the threshold value and the tripping delay is adjustable over a range of instantaneous to 30 s (0, 0.1-30 s). A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers maintenance free Easy Connect Technology with push-in terminals.
EAN
4016779852432
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-ESS.2P; CM-ESS.2S Voltage monitoring relays, single-phase AC/DC
Instructions and Manuals
Instruction Sheet / Manual - CM-ExS Single-phase voltage monitoring relays | Installation instructions - CM-ExS Single-phase voltage monitoring relays
CAD Dimensional Drawing
Information - 2D and 3D files for CAD systems
Product Net Width
22.5 mm
Product Net Height
85.6 mm
Product Net Depth / Length
103.7 mm
Product Net Weight
0.17 kg
Function
Over- or undervoltage monitoring
Measuring Range
3 ... 30 V | 6 ... 60 V | 30 ... 300 V | 60 ... 600 V
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
Screwless 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 | Output Circuit 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
3
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
Nr. Operations 30000000 cycle
Connecting Capacity
Flexible with Ferrule 2x 0.5 ... 1.5 mm² | Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mm² | Flexible 2x 0.5 ... 1.5 mm² | Rigid 2x 0.5 ... 1.5 mm²
Wire Stripping Length
8 mm
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 2x 18-16 AWG | Rigid 2x 20-16 AWG
Pilot Duty UL/CSA
B300
Flammability According to UL94
V-0
Ambient Air Temperature
Operation -20 ... +60 °C | Storage -40 ... +85 °C
Maximum Operating Altitude Permissible
Without Derating 2000 m
Conflict Minerals Reporting Template (CMRT)
CMRT - Conflict Minerals Reporting Template
REACH Declaration
REACh Info for Electronic Relays and Controls
RoHS Information
RoHS Declaration of conformity for Electronic Relays and Controls
RoHS Status
Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019
Toxic Substances Control Act - TSCA
Toxic Substances Control Act (TSCA) declaration for Electronic Relays and Controls
CB Certificate
CB_DK-28255-UL
CQC Certificate
CQC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
cULus Certificate
cULus508_20120203-E140448
Declaration of Conformity - CCC
CCC Certificate, Relays, CM-SRS.., CM-SFS.., CM-ESS..,CM-EFS.., CM-TCS.., Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
Declaration of Conformity - UKCA
UK Declaration of Conformity - CM-ExS.xxx, CM-SxS.xxx Single-phase current and voltage monitoring relays
DNV GL Certificate
DVN Certificate - Voltage monitoring relays CM-EFS.x and CM-ESS.x with screw or push-in terminals
EAC Certificate
EAC Certificate - Measuring and monitoring relays CM-xxS.xxx and CM-xxN.xxx range in the new housing
Package Level 1 Units
box 1 piece
Package Level 1 Width
97 mm
Package Level 1 Depth / Length
30 mm
Package Level 1 Height
109 mm
Package Level 1 Gross Weight
0.193 kg
Package Level 1 EAN
4016779852432
Object Classification Code
B
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)
2712248
E-Number (Norway)
4188087
E-Number (Sweden)
3860645
Feature: 110-130 V AC control supply enables seamless integration with standard automation cabinets. Impact: simplifies wiring strategy and reduces supply-chain variation. Application: ideal for single-phase panels in machine centers and control closets. Feature: Four measuring ranges (3-30 V, 6-60 V, 30-300 V, 60-600 V) with RMS sensing. Impact: maintains accurate protection across variable loads and input conditions. Application: protectsPLC inputs and motor starters in dynamic production lines. Feature: Over- and undervoltage monitoring with adjustable hysteresis (3-30%) and tripping delay (0 s to 30 s). Impact: tailored protection curves that minimize nuisance trips while ensuring fast fault indication. Application: critical in conveyors, pumps, and feeder circuits. Feature: 2 c/o SPDT outputs rated up to 4 A at 230 V AC. Impact: clean, isolated signaling for alarms or interlocks, reducing downstream wiring and component counts. Application: interlock circuits and control logic in MCCs and switchgear. Feature: Maintenance-free Easy Connect push-in terminals with sealable cover accessory. Impact: faster installation, fewer field wiring errors, and protection against unauthorized changes. Application: field assemblies in harsh environments where service interruptions are costly. Feature: DIN rail mounting (TH35-15 or TH35-7.5) and IP50 housing. Impact: simplified installation and robust operation in crowded panels. Application: retrofit and new panel builds in automotive, food & beverage, and packaging lines.
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FAQs
Is the CM-ESS.2P compatible with standard DIN rails and what terminals are used for wiring? Yes, it mounts on TH35-15 or TH35-7.5 DIN rails and uses maintenance-free push-in terminals for fast connections. Flexible conductor ranges of 2x 0.5 to 1.5 mm² (and ferrules) simplify field wiring, reducing commissioning time and miswiring risk.
The device operates from 110-130 V AC and offers four measuring ranges: 3-30 V, 6-60 V, 30-300 V, 60-600 V with RMS sensing. It provides 2 SPDT contacts, each rated up to 4 A at 230 V AC, and features adjustable hysteresis (3-30%) and trip delay (0 s to 30 s), enabling tailored protection profiles.
Yes. Designed for single-phase monitoring, the CM-ESS.2P protects motor starters, PLC inputs, and control panels by delivering reliable over- and undervoltage protection. Its 2 SPDT outputs allow simple signaling to alarms or interlocks, while its open-circuit sensing and adjustable delay prevent nuisance trips in fast-changing electrical environments.
CM-ESS.2P carries CE and UKCA conformity and UL/cUL recognition for industrial control panels. Additional certifications referenced include CCC, CB, and CQC declarations, along with UL 508 compliance where applicable. This enables safer integration into global control systems and supports regulatory compliance in many regions.
Maintenance requirements are minimal thanks to maintenance-free Easy Connect terminals and solid mechanical durability. The installer gains time savings during wiring and commissioning, and reduced downtime from fewer nuisance trips. Over the lifecycle, this translates to lower maintenance costs, faster panel upgrades, and improved system reliability in production environments.