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2CSG252211R1202 ABB ELR48P Residual Current Monitor 48 mm
ABB ELR48P compact 48 mm Type A residual current monitor with adjustable 0.03–30 A sensitivity, 0–5 second intervention time and fail-safe functionality for low-voltage earth leakage protection.
£344.71
Why Choose the ABB ELR48P Residual Current Monitor?
The ABB ELR48P is a compact Type A electronic residual current monitor and relay designed for monitoring and protection of low-voltage electrical distribution networks. As part of the ABB ELR residual current relay series, it operates with an external toroidal transformer to detect earth leakage currents and can be combined with suitable MCBs, MCCBs and tripping devices to provide effective residual current protection.
The ELR48P combines adjustable residual current sensitivity and intervention delay with fail-safe and auto-reset functions, providing flexible protection for industrial and commercial electrical systems. Front-panel Test and Reset controls and LED status indication simplify commissioning, functional testing and fault identification.
With a compact 48 × 48 mm front-panel format, adjustable sensitivity from 0.03–30 A and an adjustable tripping time from 0–5 seconds, the ELR48P is well suited to space-conscious switchboards and control panels. This version supports 110 V AC/DC and 230 V AC operation and complies with IEC/EN 60947-2 Annex M.
Key Advantages
- Compact residual current monitoring and protection for low-voltage networks.
- Type A residual current detection for AC and pulsating DC residual currents.
- Wide 0.03–30 A adjustable sensitivity range.
- Adjustable 0–5 second tripping delay supports protection coordination.
- Integrated fail-safe and auto-reset functions.
- Compact 48 × 48 mm front-panel format saves switchboard space.
- Designed for operation with an external ABB toroidal transformer.
- Compliant with IEC/EN 60947-2 Annex M.
Key Features
- ABB ELR series residual current relay.
- Type A residual current monitoring.
- 0.03–30 A adjustable residual current sensitivity.
- 0–5 second adjustable intervention time.
- 110 V AC/DC or 230 V AC operating voltage.
- 50/60 Hz rated frequency.
- Integrated fail-safe functionality.
- Integrated auto-reset functionality.
- Front-panel Test and Reset push-buttons.
- Green LED for auxiliary supply presence and red LED for trip indication.
- External toroidal transformer connection for residual current sensing.
- Compact 48 × 48 × 92 mm front-panel design.
Reliable Residual Current Protection for Electrical Distribution
Residual current relays monitor electrical circuits through an external toroidal transformer surrounding the active conductors. Any imbalance between the currents flowing through those conductors indicates leakage towards earth, allowing the relay to initiate protective operation when the configured residual current threshold is exceeded.
The ABB ELR48P can be combined with suitable MCBs, MCCBs and associated tripping devices to create a coordinated residual current protection system. Its adjustable sensitivity and time delay allow protection characteristics to be configured for different installations while helping achieve selective operation within low-voltage distribution networks.
Typical Applications
- Low-voltage electrical distribution systems.
- Industrial switchboards and distribution panels.
- Commercial electrical installations.
- Machinery and industrial control panels.
- Earth leakage monitoring and protection systems.
- MCB and MCCB protection arrangements with suitable trip accessories.
- Electrical installations requiring adjustable residual current protection.
Technical Specifications
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| Monitoring Function | Earth leakage / residual current | |
|---|---|---|
| Series | ELR | |
| ABB order code | 2CSG252211R1202 | |
| Product group | Earth Monitoring Devices | |
| Product type | Electronic residual current monitor / relay | |
| Residual current type | Type A | |
| Function | Mixed system | |
| Residual current sensitivity | 0.03–30 A | |
| Intervention time | 0–5 seconds | |
| Rated voltage | 110–230 V | |
| Operating voltage | 110 V AC/DC / 230 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Power loss | 3 W | |
| Functions | Fail-safe and auto-reset | |
| Mounting type | Front-panel mounting | |
| Dimensions (H × W × D) | 48 × 48 × 92 mm | |
| Weight | 120 g | |
| Standard | IEC/EN 60947-2 Annex M | |
| EAN | 8012542748229 |
Frequently Asked Questions
What is the ABB ELR48P used for?
The ABB ELR48P is used to monitor residual or earth leakage current in low-voltage electrical distribution systems and initiate protective operation when the selected threshold is exceeded.
What residual current range can the ELR48P monitor?
The ELR48P provides adjustable residual current sensitivity from 0.03–30 A, enabling the protection threshold to be configured for different electrical installations.
Does the ABB ELR48P require a toroidal transformer?
Yes. The ELR48P is designed to operate with an external toroidal transformer, which detects residual current in the monitored conductors and provides the sensing signal to the relay.
What supply voltage does the ELR48P use?
This ELR48P version supports 110 V AC/DC or 230 V AC operation, with a rated frequency of 50/60 Hz for AC supplies.
What standard does the ABB ELR48P comply with?
The ABB ELR48P complies with IEC/EN 60947-2 Annex M for residual current relay protection applications.
Trusted ABB Earth Monitoring Technology
ABB ELR residual current relays provide configurable earth leakage monitoring and protection for low-voltage distribution systems, combining external toroidal current sensing with adjustable protection settings and practical control functions for industrial and commercial switchboards.
