ABB 1SVR740660R0100 Insulation Monitoring Relay - IP50
Part Number: 1SVR740660R0100
Quick Summary
The Insulation monitoring relay CM-IWS.1P from ABB protects IT electrical systems by continuously monitoring insulation resistance to detect faults early. For operators managing unearthed IT networks, insulation faults can silently degrade performance, cause nuisance tripping, or lead to unexpected downtime when least expected. This device supports critical standards and certifications, including IEC 61557-8, CE, UKCA, UL/CSA, CB and CCC, ensuring safe, compliant operation across regional installations. Designed for flexible implementation, it runs on 24–240 V AC/DC, measures 1–100 kΩ, provides a single SPDT output, and mounts on standard DIN rails with screwless terminals to streamline panel assembly.
Product Information
Extended Description
1SVR740660R0100 ABB: The CM-IWS.1P serves to monitor insulation resistance in accordance with IEC 61557-8 in unearthed IT AC systems, IT AC systems with galvanically connected DC circuits, or unearthed IT DC systems with a voltage up to 250 V AC and 300 V DC. It can be configured to the
requirements of the applications and therefore used multi-functional.
EAN
4016779852647
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - CM-IWS.1x Insulation monitoring relay with screw or push-in terminals
Instructions and Manuals
Instruction Sheet / Manual - CM-IWS.1; CM-IWS.2 Insulation monitoring relays, with screw or push-in terminals
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
0.137 kg
Function
Unearthed AC systems | Unearthed DC systems | Unearthed mixed AC / DC systems | Up to 250 V AC | Up to 300 V DC
Measuring Range
1 ... 100 kΩ
Rated Control Supply Voltage (Us)
24 ... 240 V AC/DC
Rated Frequency (f)
Measuring Circuit 15 ... 400 Hz
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 | Supply Circuit / Measuring Circuit 6 kV | Supply Circuit / Output Circuit 6 kV
Rated Insulation Voltage (Ui)
Measuring Circuit / Output Circuit 300 V | Supply Circuit / Measuring Circuit 300 V | Supply Circuit / Output Circuit 300 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
System Leakage Capacitance (CE)
10 µF
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
Recommended Screw Driver
0.8 x 4
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 61326-2-4 | IEC/EN 61557-1 | IEC/EN 61557-8 | 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 -25 ... +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-30302-A1-UL
CCC Certificate
CCC Certificate - Insulation monitoring relays CM-IWS.x, CM-IWN.x, and coupling unit CM-IVN, old and new housing
CQC Certificate
CQC Certificate, Insulation Monitoring Relays, CM-IWS.xx, CM-IWN.xx, CM-IVN.x, Made in Germany
cULus Certificate
cULus508_20120727-E140448
Declaration of Conformity - CCC
CCC Declaration of Conformity, Insulation Monitoring Relays, CM-IWS.xx, CM-IWN.xx, CM-IVN.x, Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-IWS.xx, CM-IWN.xx, CM-IVN.x Insulation monitoring relay
Declaration of Conformity - UKCA
UK Declaration of Conformity - CM-IWS.xx, CM-IWN.xx, CM-IVN.x Insulation monitoring relay
DNV GL Certificate
DNV GL Certificate - CM-IWS.1, CM-IWS.2, CM-IWN.1, CM-IVN insulation monitoring relays
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
0.162 kg
Package Level 1 EAN
4016779852647
Object Classification Code
B
ETIM 7
EC001444 - Insulation and earth fault monitoring relay
ETIM 8
EC001444 - Insulation and earth fault monitoring relay
ETIM 9
EC001444 - Insulation and earth fault monitoring relay
eClass
V11.0 : 27371807
UNSPSC
39122331
E-Number (Finland)
2712259
E-Number (Norway)
4187805
E-Number (Sweden)
3860659
Feature: Measuring range and supply. The CM-IWS.1P provides a 1–100 kΩ measuring range and accepts 24–240 V AC/DC. Business impact: This broad flexibility supports precise insulation fault detection across diverse IT configurations, reducing false alarms and enabling timely maintenance. Application: Suitable for UNEARTHED IT systems and mixed AC/DC networks. Feature: Output signaling. It delivers a single SPDT contact with defined switching capabilities that integrate directly with PLCs and alarm systems. Business impact: Improves protective signaling, accelerates fault response, and enhances safety margins in critical applications. Application: IT rooms, data centers, and industrial control panels. Feature: Installation convenience. With screwless terminals and DIN rail mounting on TH35-15 or TH35-7.5, wiring and installation are faster and more durable. Business impact: Shortens commissioning time, reduces wiring errors, and lowers labor costs. Application: New builds and retrofit panels across manufacturing floors. Feature: Protection and isolation. Rated insulation voltage of 300 V across circuits, impulse withstand voltage of 6 kV, and IP50 housing provide robust protection in crowded switchgear environments. Business impact: Enhances reliability in EMI-prone environments and simplifies enclosure design. Application: Panel boards and control cabinets. Feature: Certifications and compliance. CE, UKCA, UL/CSA, CB, CCC, and CQC support global deployments and supplier risk minimization. Business impact: Faster market access, reduced qualification overhead, and consistent safety documentation. Application: Multinational facilities and cross-border projects. Feature: Durability and lifecycle. Electrical durability of AC-12 up to 100,000 cycles and mechanical durability of 30,000,000 cycles extend service life. Business impact: Lower maintenance intervals and improved total cost of ownership. Application: Continuous operation in automation environments.
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FAQs
Yes. The CM-IWS.1P is designed for DIN rail installation on TH35-15 or TH35-7.5 rails, and it supports mounting in standard control panels. It uses screwless terminals to streamline connections and is compatible with common enclosure layouts, reducing installation time and potential wiring errors during retrofits or new builds.
The device measures insulation resistance in the range of 1 to 100 kΩ and accepts a control supply voltage from 24 to 240 V AC/DC. It is intended for unearthed IT systems, IT systems with galvanically connected DC circuits, or unearthed IT DC systems up to 250 V AC and 300 V DC, aligning with IEC 61557-8 requirements.
Best suited for unearthed IT AC, unearthed IT DC, and mixed AC/DC IT networks, including systems with galvanically connected DC circuits. It provides continuous insulation monitoring, early fault detection, and a simple SPDT output for protective signaling, making it ideal for data centers, manufacturing control rooms, and critical automation panels.
CM-IWS.1P carries CE and UKCA markings, UL/CSA certification, CB certificate, CCC, and CQC declarations. It also references IEC 61557-1 and IEC 61557-8 for insulation monitoring, UL 508 for industrial control equipment, and other global compliance marks to support cross-border deployments.
By delivering early insulation fault detection, the CM-IWS.1P reduces unexpected outages and nuisance trips. Its high durability (AC-12 up to 100,000 cycles and 30,000,000 mechanical cycles) lowers maintenance intervals, while screwless terminals and DIN rail compatibility shorten commissioning. The result is lower total cost of ownership and improved system uptime in automation environments.