ABB CM-ESS.1P Voltage Monitoring Relay - UL/CSA B300 Certified
Part Number: 1SVR740831R1300
Quick Summary
The CM-ESS.1P voltage monitoring relay by ABB is a single-phase protection device for 220-240 V AC control circuits. It delivers reliable fault detection to minimize downtime and equipment damage in machine panels and automation lines. This product carries CE, UL/CSA, and UKCA certifications, underscoring its suitability for global deployment in safety-critical environments. With Easy Connect push-in terminals and DIN-rail mounting, it simplifies commissioning and field wiring. Four measuring ranges cover both low- and high-voltage scenarios, and the adjustable hysteresis of 3–30% lets you tailor protection to specific loads. In addition, RMS-based monitoring for AC and DC signals provides robust fault indication to PLCs and interlocks while reducing post-install adjustments.
Product Information
Extended Description
1SVR740831R1300 ABB: The CM-ESS.1P 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 220 - 240 V AC and has a 1 c/o (SPDT) output contact rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC voltages with 4 measuring ranges: 3-30 V, 3-60 A, 30-300 V and 60-600 V and works according to the open-circuit principle. The CM-ESS.1P is configurable for over- or undervoltage monitoring, the hysteresis is adjustable within a range of 3 to 30 % of the threshold value. 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
4016779852449
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-ESS.1P; CM-ESS.1S 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
0.155 kg
Function
Over- or undervoltage monitoring
Measuring Range
3 ... 30 V | 6 ... 60 V | 30 ... 300 V | 60 ... 600 V
Rated Control Supply Voltage (Us)
220 ... 240 V AC
Output
1 c/o (SPDT) contact
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 | 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 6 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
0.178 kg
Package Level 1 EAN
4016779852449
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)
2712243
E-Number (Norway)
4188083
E-Number (Sweden)
3860646
Feature → Business Impact → Application: 1 c/o SPDT output rated at 250 V / 4 A provides clean, reliable control signals for safety interlocks and logic inputs, reducing nuisance trips and controller misreads in panel assemblies. Application: machine parks and packaging lines where precise interlock control is essential. Feature → Business Impact → Application: Four measuring ranges—3-30 V, 3-60 A, 30-300 V, 60-600 V—enable a single device to protect both low- and high-voltage branches, lowering part diversity and inventory costs. Application: centralized control panels and drives in mixed-voltage environments. Feature → Business Impact → Application: RMS measuring principle for AC/DC signals delivers consistent fault detection across supply types, improving compliance with local electrical standards. Application: inverter-fed machinery and critical drive circuits. Feature → Business Impact → Application: Adjustable hysteresis from 3 to 30% reduces false trips while preserving protection margins. Application: motor protection in pumps and conveyors. Feature → Business Impact → Application: Easy Connect push-in terminals speed up wiring and shorten commissioning time, while DIN rail mounting compactly fits standard control cabinets. Application: modular factory automation racks. Feature → Business Impact → Application: Robust mechanical and electrical durability (AC-12 100000 cycles, 30,000,000 operations) ensures long service life in demanding environments. Application: food-and-beverage lines, material handling, and process automation. Feature → Business Impact → Application: Optional sealable cover enhances security against unauthorized changes. Application: safe, maintenance-friendly panel installations.
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FAQs
Mount the unit on a TH35 DIN rail (35 x 15 mm or 35 x 7.5 mm). Use the Easy Connect push-in terminals to attach 2 conductors per terminal as specified (rigid or flexible 0.5–1.5 mm²). Wire the 1 c/o SPDT output to the control logic or PLC inputs, observing the 250 V / 4 A rating. Verify polarity and test the open/close state with a low-current test signal before full operation.
The device supports four measuring ranges: 3-30 V, 3-60 A, 30-300 V, and 60-600 V, using RMS measurement for AC and DC signals. The output is 1 c/o SPDT, rated at 250 V and 4 A, suitable for driving PLC inputs or interlock circuits in typical automation panels.
Yes, CM-ESS.1P employs RMS sensing suitable for both AC and DC signals, enabling accurate voltage monitoring across a range of supply types. This helps ensure consistent fault detection and protection for drives, motors, and control circuits regardless of the source waveform.
CM-ESS.1P carries CE, UL/CSA, and UKCA marks, among others like CCC and CB where applicable. This supports compliance with European, North American, and UK market requirements, facilitating safe integration into multinational panel builds and aiding regulatory documentation and safety certifications.
Easy Connect push-in terminals reduce wiring time and tool requirements, accelerating commissioning and field changes. The combination with DIN rail mounting simplifies panel design and reduces rework during upgrades, translating to lower labor costs and faster return on investment in new or expanded automation projects.