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1SVR750660R0200 ABB CM-IWN.1S Insulation Monitoring Relay
ABB CM-IWN.1S 1SVR750660R0200 is an insulation monitoring relay for unearthed AC, DC and mixed AC/DC systems up to 400 V AC or 600 V DC, with selectable 1–100 kΩ and 2–200 kΩ measuring ranges, a 24–240 V AC/DC supply and configurable changeover outputs.
£460.01
Why Choose the ABB CM-IWN.1S Insulation Monitoring Relay?
The ABB CM-IWN.1S, order code 1SVR750660R0200, is an insulation monitoring relay designed for continuous supervision of insulation resistance in unearthed IT supply systems. It is suitable for AC, DC and mixed AC/DC systems, helping detect deteriorating insulation before an earth fault develops into a more serious electrical problem.
The CM-IWN.1S can monitor unearthed systems up to 400 V AC or 600 V DC. It provides selectable insulation resistance measuring ranges of 1–100 kΩ and 2–200 kΩ, enabling the response threshold to be adapted to the requirements of the installation.
A wide 24–240 V AC/DC rated control supply simplifies integration across different control-voltage standards. The relay also provides two configurable changeover contacts, supports system leakage capacitance up to 20 µF and uses robust screw terminals in a 45 mm-wide DIN-rail housing.
Key Advantages
- Continuous insulation resistance monitoring for unearthed electrical systems.
- Suitable for AC, DC and mixed AC/DC IT systems.
- Monitors systems up to 400 V AC and 600 V DC.
- Selectable measuring ranges of 1–100 kΩ and 2–200 kΩ.
- Wide 24–240 V AC/DC control supply range.
- Supports system leakage capacitance up to 20 µF.
- Two configurable changeover contacts provide flexible alarm and control signalling.
- Secure screw terminal connections for industrial panel wiring.
- Compact DIN-rail design for straightforward control-panel integration.
Key Features
- ABB CM-IWN insulation monitoring relay.
- Insulation resistance monitoring in unearthed IT networks.
- Suitable for unearthed AC, DC and mixed AC/DC systems.
- System voltage up to 400 V AC / 600 V DC.
- Selectable 1–100 kΩ / 2–200 kΩ measuring ranges.
- 24–240 V AC/DC rated control supply voltage.
- Measuring-circuit frequency range of 15–400 Hz.
- Maximum system leakage capacitance of 20 µF.
- 2 × 1 c/o or 1 × 2 c/o configurable output contacts.
- Screw terminal connection technology.
- DIN-rail mounting.
- Operating ambient temperature range of -25 to +60 °C.
Reliable Insulation Monitoring for Unearthed IT Systems
In an unearthed IT system, insulation monitoring provides continuous supervision between the active conductors and earth. The ABB CM-IWN.1S monitors insulation resistance and can signal when it falls below the configured threshold, allowing maintenance personnel or control systems to respond to deteriorating insulation conditions.
With compatibility for systems up to 400 V AC or 600 V DC, selectable resistance ranges and support for up to 20 µF system leakage capacitance, the CM-IWN.1S provides flexible insulation supervision for industrial power, control and automation installations where maintaining continuity of supply is important.
Typical Applications
- Unearthed industrial IT electrical systems.
- AC insulation resistance monitoring.
- DC insulation resistance monitoring.
- Mixed AC/DC unearthed systems.
- Industrial machinery and automation equipment.
- Process and manufacturing installations.
- Power distribution and control systems requiring insulation supervision.
- Electrical control panels and switchboards.
Technical Specifications
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| Signal / Input Range | 1–100 kΩ | |
|---|---|---|
| Monitoring Function | Insulation | |
| Series | CM-IWN | |
| ABB order code | 1SVR750660R0200 | |
| Product group | 310921 – Measuring & Monitoring Relays | |
| Product type | Insulation monitoring relay | |
| Function | Insulation resistance monitoring of unearthed systems | |
| Supported systems | Unearthed AC, DC and mixed AC/DC systems | |
| Maximum monitored AC system voltage | 400 V AC | |
| Maximum monitored DC system voltage | 600 V DC | |
| Rated control supply voltage | 24–240 V AC/DC | |
| Measuring ranges | 1–100 kΩ / 2–200 kΩ | |
| Measuring-circuit frequency | 15–400 Hz | |
| System leakage capacitance | Up to 20 µF | |
| Output | 2 × 1 c/o or 1 × 2 c/o contacts, configurable | |
| Terminal type | Screw terminals | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Mounting type | DIN rail | |
| Width | 45 mm | |
| Height | 85.6 mm | |
| Depth | 104.8 mm | |
| Net weight | 0.241 kg |
Frequently Asked Questions
What is the ABB CM-IWN.1S used for?
The CM-IWN.1S is used for continuous insulation resistance monitoring in unearthed AC, DC and mixed AC/DC electrical systems, helping identify deterioration in insulation before it develops into a more serious earth fault.
What system voltages can the CM-IWN.1S monitor?
The CM-IWN.1S is designed for unearthed systems with nominal voltages up to 400 V AC or 600 V DC.
What insulation resistance ranges does the CM-IWN.1S provide?
The relay provides selectable insulation resistance measuring ranges of 1–100 kΩ and 2–200 kΩ.
What supply voltage does the CM-IWN.1S require?
The ABB CM-IWN.1S operates from a wide 24–240 V AC/DC rated control supply, making it suitable for a variety of industrial control-voltage systems.
What outputs and terminals does the CM-IWN.1S provide?
The CM-IWN.1S provides two configurable changeover contacts, which can operate as 2 × 1 c/o or 1 × 2 c/o outputs, and uses screw terminals for electrical connections.
Trusted ABB Insulation Monitoring Technology
ABB CM insulation monitoring relays provide continuous supervision of insulation resistance in unearthed electrical systems, supporting early fault detection and dependable operation of industrial power, machinery and automation installations.
