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2CSG152130R1202 ABB ELR96 Residual Current Monitor
ABB ELR96 is a Type A front-panel electronic residual current monitor and relay with adjustable 0.03–30 A sensitivity and time-delay settings for use with external toroidal transformers in low-voltage distribution systems.
£306.94
Why Choose the ABB ELR96 Residual Current Monitor?
The ABB ELR96 is an electronic front-panel residual current monitor and relay designed for monitoring and protecting low-voltage electrical distribution systems. Used with an external ABB TR-series toroidal transformer and suitable circuit-breaking equipment, it detects earth-leakage currents and provides an output for initiating protective disconnection.
The ELR96 provides adjustable residual-current sensitivity from 0.03 A to 30 A when used with the appropriate multiplier setting, together with an adjustable operating delay. This flexibility allows the relay to be configured for different earth-fault protection and discrimination requirements across commercial and industrial electrical systems.
Designed for 96 mm × 96 mm front-panel mounting, the ELR96 features sensitivity and delay controls, TEST and RESET pushbuttons, and LED indication for auxiliary supply and trip status. It complies with IEC/EN 60947-2 Annex M and is designed to work with external toroidal current transformers and appropriate MCB or MCCB protection.
Key Advantages
- Wide adjustable residual-current range from 0.03 A to 30 A using the available multiplier settings.
- Adjustable operating delay supports protection coordination and discrimination.
- Type A residual-current monitoring for AC and pulsating DC residual-current waveforms.
- Designed for use with external ABB TR-series toroidal transformers.
- TEST and RESET controls simplify functional checking and resetting.
- LED status indication provides clear auxiliary-supply and trip information.
- Front-panel format provides convenient access to settings and indications.
Key Features
- Electronic residual current relay for low-voltage distribution systems.
- Type A residual-current monitoring.
- Residual-current sensitivity settings covering 0.03–30 A.
- Adjustable delay settings covering 0–5 s using the applicable multiplier.
- 110 V AC/DC, 230 V AC and 400 V AC auxiliary supply options.
- 50–60 Hz rated frequency.
- Maximum consumption of 4 VA.
- 5 A at 250 V output contact capacity.
- Compatible with ABB TR-series toroidal transformers.
- Front-panel TEST and RESET pushbuttons with ON and FAULT LED indication.
Adjustable Residual-Current Monitoring and Protection
The ABB ELR96 operates with an external toroidal transformer that monitors the conductors of the protected circuit. Under normal conditions the vector sum of the currents passing through the toroid is effectively balanced; an earth-leakage or insulation fault creates a residual current that can be detected by the relay. When the configured threshold and operating conditions are reached, the ELR96 output can initiate disconnection through suitable associated circuit-breaking equipment.
Its adjustable sensitivity and time-delay controls allow the protection response to be matched to the installation and coordinated with other protective devices. The ELR96 therefore provides a flexible solution for earth-leakage monitoring in distribution systems where a separate residual-current relay, toroidal transformer and circuit breaker arrangement is required.
Typical Applications
- Low-voltage electrical distribution boards.
- Industrial switchboards and control panels.
- Commercial building electrical distribution systems.
- Earth-leakage and insulation-fault monitoring.
- MCB and MCCB protection schemes using an external toroidal transformer.
- Installations requiring adjustable residual-current sensitivity and operating delay.
Technical Specifications
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| Time Delay | Adjustable | |
|---|---|---|
| Monitoring Function | Earth leakage / residual current | |
| ABB order code | 2CSG152130R1202 | |
| Product type | Electronic residual current monitor / relay | |
| Residual-current type | A | |
| Auxiliary supply | 110 V AC/DC; 230 V AC; 400 V AC (±20%) | |
| Rated frequency | 50–60 Hz | |
| Maximum consumption | 4 VA | |
| Sensitivity range | 0.03–30 A using selectable multiplier settings | |
| Delay adjustment | 0–5 s using selectable multiplier settings | |
| Output contact capacity | 5 A at 250 V | |
| Toroidal transformer compatibility | ABB TR range | |
| Operating temperature | -10 to +60 °C | |
| Storage temperature | -20 to +70 °C | |
| Maximum humidity | ≤95% | |
| Front dimensions | 96 mm × 96 mm | |
| Panel cut-out | 92 mm × 92 mm | |
| Front protection | IP40, or IP52 with cover | |
| Terminal protection | IP20 | |
| Connection | Screw terminals, up to 2.5 mm² conductor cross-section | |
| Applicable standard | IEC/EN 60947-2 Annex M | |
| Mounting | Front-panel mounting |
Frequently Asked Questions
What is the ABB ELR96 used for?
The ABB ELR96 is an electronic residual current monitor and relay used with an external toroidal transformer to detect earth-leakage current and initiate protective operation through associated circuit-breaking equipment.
What residual-current range can the ELR96 monitor?
The ELR96 provides adjustable residual-current sensitivity covering 0.03 A to 30 A using its available multiplier settings.
Does the ABB ELR96 require a toroidal transformer?
Yes. The ELR96 is designed to operate with an external ABB TR-series toroidal transformer, which senses the residual current in the monitored circuit.
Can the ELR96 operating delay be adjusted?
Yes. The relay provides adjustable delay settings covering 0–5 s using the applicable multiplier settings, allowing the protection response to be coordinated with the electrical installation.
Which standard applies to the ABB ELR96?
The ABB ELR96 residual current relay complies with IEC/EN 60947-2 Annex M.
Trusted ABB Earth-Fault Monitoring
ABB ELR residual current relays provide adjustable earth-leakage monitoring for low-voltage distribution systems, combining external toroidal sensing, configurable sensitivity and time-delay control with practical front-panel operation.
