2CSM656000R1500 ABB ISL-C 600 Insulation Monitor 60–760 V AC

Why Choose the ABB ISL-C 600 Insulation Monitor?

The ABB ISL-C 600 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 monitors resistance to earth and signals insulation deterioration so faults can be identified while maintaining continuity of electrical service.

Designed for AC IT networks with monitored line voltages up to 760 V AC, the ISL-C 600 uses a continuous measuring signal between the isolated network and earth to determine insulation resistance. Adjustable ALARM and TRIP thresholds provide early warning and fault signalling when insulation falls below the selected levels.

The ISL-C 600 features selectable 10–100 kΩ TRIP thresholds, a maximum 5 s trip delay and two voltage-free changeover relay outputs. A front 8-point LED bar display covering 5–500 kΩ, together with TEST and RESET controls, provides clear monitoring and convenient functional checking in industrial electrical systems.

Key Advantages

• Continuous insulation monitoring for unearthed IT AC networks.
• Suitable for monitored network voltages up to 760 V AC.
• Selectable 10–100 kΩ TRIP threshold for application-specific insulation monitoring.
• 8-point LED bar display provides visual indication of insulation resistance from 5–500 kΩ.
• Two voltage-free changeover relay outputs support remote signalling.
• Programmable fail-safe relay operation for dependable system supervision.
• Local and remote TEST and RESET functionality.
• Manual or automatic reset configuration supports different operating requirements.

Key Features

• ABB ISL-C series industrial insulation monitor.
• 60–760 V AC rated operational voltage range.
• 100–130 / 220–240 V AC auxiliary supply.
• 50 / 60 Hz operation.
• 10–100 kΩ TRIP threshold with five selectable levels.
• 5 s maximum trip delay.
• 0.25 mA maximum measuring current.
• 48 V DC maximum measuring voltage.
• 200 kΩ internal impedance.
• Two NO-C-NC changeover relay outputs.
• Relay contact capacity up to 250 V, 5 A.
• Front TEST and RESET pushbuttons with remote control capability.

Reliable Insulation Monitoring for AC IT Networks

In an unearthed IT electrical network, high insulation impedance limits the current produced by a first earth fault, allowing the system to continue operating in applications where service continuity is important. Continuous insulation monitoring is therefore used to detect deterioration promptly so the fault can be located and corrected before an additional insulation failure develops.

The ABB ISL-C 600 continuously supervises insulation resistance by applying a measuring signal between the isolated line and earth and evaluating the resulting leakage current. Its selectable thresholds, LED resistance display, changeover relay outputs and configurable reset functions provide comprehensive insulation supervision for industrial AC networks operating at voltages up to 760 V AC.

Typical Applications

• Unearthed industrial IT AC networks up to 760 V AC.
• Industrial low-voltage distribution systems.
• Manufacturing and process plant electrical systems.
• Industrial machinery and automation installations.
• Electrical switchboards and control panels.
• Systems where continuity of operation after a first insulation fault is important.