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2CSM545000R1500 ABB ISL-C 440 Insulation Monitor 380–415 V AC
ABB ISL-C 440 is an industrial insulation monitoring device for continuous supervision of 380–415 V AC unearthed IT networks, with selectable alarm and trip thresholds and an integrated relay output.
£398.48
Why Choose the ABB ISL-C 440 Insulation Monitor?
The ABB ISL-C 440 is an industrial insulation monitoring device designed for continuous supervision of insulation resistance in unearthed IT AC networks. As part of the ABB ISL insulation monitoring series, it detects deterioration of insulation to earth and provides alarm and trip signalling so faults can be identified while supporting continuity of electrical service.
Designed for 380–415 V AC monitored networks, the ISL-C 440 continuously measures insulation resistance between the live network and earth. This is particularly valuable in IT systems, where the first insulation fault does not normally require immediate interruption of the supply and can instead be detected and investigated before a second fault develops.
The ISL-C 440 operates from a 220–240 V AC auxiliary supply and provides selectable 30–300 kΩ alarm and 10–150 kΩ trip thresholds. With a maximum trip delay of 4 s, relay output and clear ON, TRIP and ALARM indications, it provides comprehensive insulation supervision for industrial AC distribution systems.
Key Advantages
- Continuous insulation monitoring for unearthed IT AC networks.
- Designed for 380–415 V AC monitored circuits.
- Selectable 30–300 kΩ alarm threshold provides early warning of insulation deterioration.
- Selectable 10–150 kΩ trip threshold for application-specific protection.
- Maximum 4 s trip delay for dependable fault response.
- Integrated relay output enables connection to external signalling and control circuits.
- Clear ON, TRIP and ALARM LED indication simplifies status monitoring.
- Supports continuity of service by identifying the first insulation fault in an IT system.
Key Features
- ABB ISL-C series insulation monitoring device.
- 380–415 V AC monitored line voltage.
- 220–240 V AC auxiliary power supply.
- 30–300 kΩ alarm threshold with five selectable levels.
- 10–150 kΩ trip threshold with five selectable levels.
- 4 s maximum trip delay.
- 0.1 mA maximum measuring current.
- 12 V DC maximum measuring voltage.
- 250 kΩ internal impedance.
- 1 NO-C-NC trip relay output.
- Relay contact capacity up to 250 V, 5 A.
- Designed specifically for AC IT networks.
Reliable Insulation Monitoring for AC IT Networks
Insulation monitoring devices continuously measure resistance between an unearthed electrical network and earth. In an IT system, the first insulation fault can be detected without necessarily interrupting the electrical supply, allowing maintenance personnel to locate and correct deteriorating insulation before a second fault creates a more serious condition.
The ABB ISL-C 440 provides this continuous supervision for 380–415 V AC IT networks. Separate alarm and trip thresholds allow developing insulation problems to be identified at different resistance levels, while the relay output and front-panel indication enable straightforward integration with industrial alarm, control and protection systems.
Typical Applications
- Unearthed 380–415 V AC IT networks.
- Industrial low-voltage distribution systems.
- Manufacturing and process plant electrical systems.
- Industrial machinery and automation installations.
- Switchboards and electrical control panels.
- Critical installations requiring continuous insulation supervision and high service continuity.
Technical Specifications
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| Monitoring Function | Insulation | |
|---|---|---|
| Series | ISL-C Insulation Monitoring Devices | |
| ABB order code | 2CSM545000R1500 | |
| Product type | Industrial insulation monitoring device | |
| Network type | Unearthed IT AC network | |
| Monitored line voltage | 380–415 V AC | |
| Auxiliary power supply | 220–240 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Power consumption | 3 VA | |
| Power loss | 4 W at rated operating conditions | |
| Alarm threshold | 30–300 kΩ, five selectable levels | |
| Trip threshold | 10–150 kΩ, five selectable levels | |
| Maximum trip delay | 4 s | |
| Maximum measuring current | 0.1 mA | |
| Maximum measuring voltage | 12 V DC | |
| Internal impedance | 250 kΩ | |
| Trip relay output | 1 NO-C-NC | |
| Relay contact capacity | Maximum 250 V, 5 A | |
| Insulation test | 2.5 kV for 60 s | |
| Impulse withstand | 4 kV, 1.2/50 µs | |
| Operating temperature | -10 to +60 °C | |
| Indication | ON, TRIP and ALARM LEDs | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 105 × 90 × 58 mm | |
| Weight | 270 g |
Frequently Asked Questions
What is the ABB ISL-C 440 used for?
The ABB ISL-C 440 is used to continuously monitor insulation resistance in unearthed IT AC networks, providing alarm and trip signalling when insulation deteriorates below selected thresholds.
What network voltage does the ABB ISL-C 440 monitor?
The ISL-C 440 is designed to monitor 380–415 V AC unearthed IT networks.
What auxiliary supply does the ISL-C 440 require?
The ABB ISL-C 440 uses a 220–240 V AC auxiliary power supply.
What insulation thresholds are available on the ISL-C 440?
The device provides a selectable 30–300 kΩ alarm threshold and a selectable 10–150 kΩ trip threshold, each with five setting levels.
What happens when the insulation level falls below the selected threshold?
The ISL-C 440 provides visual ALARM and TRIP indication and incorporates a relay output that can be connected to external signalling, control or protection equipment.
Trusted ABB Insulation Monitoring Technology
ABB ISL insulation monitoring devices continuously supervise resistance to earth in industrial IT networks, helping identify the first insulation fault, reduce plant downtime and support reliable operation where continuity of electrical service is important.
