Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
2CSM111000R1500 ABB ISL-A 24-48 Insulation Monitor 24–48 V AC/DC
ABB ISL-A 24-48 is a compact DIN-rail insulation monitoring device designed for continuous insulation supervision of 24–48 V AC/DC unearthed IT electrical networks.
£839.96
Why Choose the ABB ISL-A 24-48 Insulation Monitor?
The ABB ISL-A 24-48 is an industrial insulation monitoring device designed to continuously supervise insulation levels in unearthed IT electrical networks. As part of the ABB ISL insulation monitoring series, it helps identify insulation deterioration and faults so corrective action can be taken while maintaining dependable operation of the electrical installation.
Designed for 24–48 V AC/DC monitored networks, the ISL-A 24-48 provides continuous insulation supervision without relying on a residual current toroidal transformer. The device monitors the insulation resistance between the network and earth, providing visual status indication and a relay output when insulation falls below the configured threshold.
The ISL-A 24-48 has a compact 3-module DIN-rail format with dimensions of 85 × 85 × 58 mm. Its rated control supply is 24–28 V AC/DC, while ABB specifies a rated operational voltage range of 24–48 V AC/DC, making it particularly suitable for low-voltage unearthed power, control and safety circuits.
Key Advantages
- Continuous insulation monitoring for unearthed IT networks.
- Designed for 24–48 V AC/DC monitored circuits.
- Helps detect insulation deterioration before it develops into a more serious electrical fault.
- Provides visual operating and low-insulation indication.
- Integrated TEST function supports functional checking of the monitoring device.
- Adjustable insulation trip threshold for application-specific monitoring.
- Compact 3-module DIN-rail design for control panels and distribution boards.
- Suitable for continuous supervision where maintaining service continuity is important.
Key Features
- ABB ISL series insulation monitoring device.
- 24–48 V AC/DC rated operational voltage.
- 24–28 V AC/DC rated control supply.
- Designed for unearthed IT networks.
- Continuous monitoring of insulation resistance to earth.
- Front indication for device operation and low insulation.
- Front-mounted TEST pushbutton.
- Adjustable TRIP threshold.
- 4 W power loss at rated operating conditions.
- Compact 3-module construction.
Reliable Insulation Monitoring for IT Networks
Unlike residual current protection, an insulation monitoring device continuously measures the insulation condition between an unearthed electrical network and earth. In an IT system, the first insulation fault does not necessarily require immediate interruption of the supply, so continuous monitoring provides an important warning that allows the fault to be located and corrected before a further insulation failure occurs.
The ABB ISL-A 24-48 is designed specifically for continuous insulation supervision of low-voltage IT networks. Its operating indication, low-insulation warning, test facility and adjustable trip threshold provide a straightforward means of identifying insulation degradation and supporting preventative maintenance in industrial electrical systems.
Typical Applications
- Unearthed 24–48 V AC/DC IT electrical networks.
- Industrial control and automation circuits.
- Safety lighting and auxiliary power systems.
- Production plant electrical systems.
- Low-voltage control panels and switchboards.
- Installations requiring continuous insulation supervision and high service continuity.
Technical Specifications
Tick the specs you need, then view products that match.
| Monitoring Function | Insulation | |
|---|---|---|
| Series | ISL Insulation Monitoring Devices | |
| ABB order code | 2CSM111000R1500 | |
| EAN | 8012542942504 | |
| Product type | Insulation monitoring device | |
| Network type | Unearthed IT network | |
| Rated operational voltage | 24–48 V AC/DC | |
| Rated control supply voltage | 24–28 V AC/DC | |
| AC supply frequency | 50 / 60 Hz | |
| Power loss | 4 W at rated operating conditions | |
| Number of modules | 3 | |
| Mounting type | DIN rail | |
| Front controls | TEST pushbutton and TRIP threshold setting | |
| Indication | Operating status and low insulation indication | |
| Dimensions (H × W × D) | 85 × 85 × 58 mm | |
| Weight | 90 g |
Frequently Asked Questions
What is the ABB ISL-A 24-48 used for?
The ABB ISL-A 24-48 is used to continuously monitor insulation levels in unearthed IT electrical networks, helping identify insulation faults and deterioration so the installation can be restored to optimum operating condition.
What network voltage can the ABB ISL-A 24-48 monitor?
The ISL-A 24-48 is designed for electrical networks with a rated operational voltage of 24–48 V AC/DC.
What control supply does the ISL-A 24-48 require?
ABB specifies a rated control supply voltage of 24–28 V AC/DC, with AC operation at 50 / 60 Hz.
Does the ABB ISL-A 24-48 have a test function?
Yes. The device includes a front-mounted TEST pushbutton for functional checking, together with operating and low-insulation indication.
Where is the ABB ISL-A 24-48 typically installed?
The compact 3-module DIN-rail device is typically installed in electrical distribution boards and control panels serving unearthed low-voltage IT networks.
Trusted ABB Insulation Monitoring Technology
ABB ISL insulation monitoring devices continuously supervise insulation levels in unearthed IT networks, helping maintenance teams identify insulation faults and restore optimum system conditions while supporting continuity of electrical service.
