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1SVR740670R0200 ABB CM-IWS.2P Insulation Monitoring Relay
ABB CM-IWS.2P insulation monitoring relay 1SVR740670R0200 for unearthed IT AC systems up to 400 V AC, with a 1–100 kΩ measuring range, 24–240 V AC/DC supply and one changeover output contact.
£167.26
Why Choose the ABB CM-IWS.2P Insulation Monitoring Relay?
The ABB CM-IWS.2P is a compact and reliable insulation monitoring relay designed to monitor insulation resistance in unearthed IT AC systems. Supplied under ABB order code 1SVR740670R0200, this CM-IWS series relay monitors systems with nominal voltages up to 400 V AC and helps identify deterioration of insulation before it develops into a more serious electrical fault.
Designed in accordance with IEC 61557-8 principles for insulation monitoring, the CM-IWS.2P provides an adjustable insulation resistance response range of 1–100 kΩ. This makes it suitable for continuous supervision of industrial unearthed AC networks where maintaining insulation integrity and detecting earth-fault conditions are important for plant availability and electrical safety.
The CM-IWS.2P operates from a wide 24–240 V AC/DC control supply and provides one changeover (SPDT) output contact for signalling or control functions. Its slim 22.5 mm housing and push-in connection technology simplify installation in industrial control panels and distribution equipment.
Key Advantages
- Reliable insulation monitoring for unearthed IT AC systems.
- Suitable for monitored system voltages up to 400 V AC.
- Adjustable 1–100 kΩ insulation resistance response range.
- Wide 24–240 V AC/DC control supply simplifies integration.
- One changeover output contact for alarm and control signalling.
- Push-in terminals support fast and convenient panel wiring.
- Slim 22.5 mm enclosure conserves DIN rail space.
Key Features
- ABB CM-IWS insulation monitoring relay series.
- ABB order code 1SVR740670R0200.
- Designed for unearthed AC systems.
- Monitored system voltage range of 0–400 V AC.
- 1–100 kΩ insulation resistance measuring range.
- 24–240 V AC/DC rated control supply voltage.
- 1 c/o (SPDT) relay output.
- Push-in / screwless terminal technology.
- Operating ambient temperature range of -25 to +60 °C.
- Compact DIN rail format for industrial control panels.
Reliable Insulation Monitoring for Unearthed Systems
Insulation monitoring relays continuously supervise the resistance between an unearthed electrical system and earth. A reduction in insulation resistance can indicate damaged cables, deteriorating equipment insulation, contamination or another developing earth fault, allowing maintenance personnel to investigate before the condition causes further disruption.
The ABB CM-IWS.2P is specifically designed for this role in unearthed AC networks. Its adjustable response range and relay output allow the device to provide a clear alarm or control signal when insulation resistance falls below the configured threshold, supporting preventative maintenance and improved system availability.
Typical Applications
- Unearthed IT AC distribution systems.
- Industrial machinery and production equipment.
- Electrical control and distribution panels.
- Manufacturing and process automation systems.
- Continuous insulation supervision of industrial electrical networks.
- Preventative maintenance and earth-fault detection systems.
Technical Specifications
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| Monitoring Function | Insulation | |
|---|---|---|
| Series | CM-IWS | |
| ABB order code | 1SVR740670R0200 | |
| Product group | 310921-Measuring & Monitoring Relays | |
| Product type | Insulation monitoring relay | |
| Application | Unearthed IT AC systems | |
| Monitored system voltage | 0–400 V AC | |
| Insulation resistance measuring range | 1–100 kΩ | |
| Rated control supply voltage | 24–240 V AC/DC | |
| Output | 1 changeover (SPDT) contact | |
| Connection technology | Push-in / screwless terminals | |
| Measuring circuit frequency | 15–400 Hz | |
| Supply frequency | 50 / 60 Hz | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Width | 22.5 mm | |
| Height | 85.6 mm | |
| Depth | 103.7 mm | |
| Net weight | approx. 0.13 kg | |
| GTIN | 4016779852654 |
Frequently Asked Questions
What is the ABB CM-IWS.2P used for?
The CM-IWS.2P is used to monitor insulation resistance in unearthed IT AC systems and provide an output signal when insulation resistance falls below the selected response value.
What system voltage can the CM-IWS.2P monitor?
The CM-IWS.2P is designed for unearthed AC systems with a monitored nominal voltage of up to 400 V AC.
What is the insulation resistance measuring range?
The relay provides an adjustable insulation resistance measuring and response range of 1–100 kΩ.
What supply voltage does the CM-IWS.2P require?
The CM-IWS.2P operates from a wide 24–240 V AC/DC control supply.
What type of terminals does the CM-IWS.2P use?
The CM-IWS.2P uses push-in screwless terminals, providing convenient electrical connection during control-panel installation.
Trusted ABB Monitoring Technology
ABB CM series measuring and monitoring relays provide compact solutions for supervising electrical parameters and system conditions in industrial control, automation and distribution applications.
