2CSG452211R1202 ABB ELR48V24P Residual Current Monitor 48mm 24-48V AC/DC
ABB ELR48V24P is a compact 48 mm Type A residual current monitor with a 24–48 V AC/DC supply, adjustable 0.03–30 A sensitivity and adjustable trip delay for low-voltage earth leakage monitoring.
Why Choose the ABB ELR48V24P Residual Current Monitor?
The ABB ELR48V24P is a compact electronic Type A residual current monitor and relay designed for monitoring and protection of low-voltage electrical distribution networks. As part of ABB’s Earth Monitoring Devices range, it operates with an external toroidal transformer to detect residual current and control associated circuit protection equipment when the configured threshold is exceeded.
Designed for 48 × 48 mm front-panel mounting, the ELR48V24P combines adjustable residual current sensitivity and trip delay with selectable Fail Safe and automatic reset functions. Front-mounted TEST and RESET controls, together with ON and FAULT LED indication, provide straightforward commissioning and operational status monitoring.
The ELR48V24P operates from a 24–48 V AC/DC auxiliary supply and provides adjustable residual current sensitivity from 0.03–30 A with a configurable delay from 0–5 s. Its compact construction makes it particularly suitable for industrial control panels, machinery and switchboards where panel space is limited but configurable earth leakage monitoring is required.
Key Advantages
Compact 48 × 48 mm Type A residual current monitor for space-conscious panel installations.
24–48 V AC/DC auxiliary supply suitable for low-voltage industrial control systems.
0.03–30 A adjustable residual current sensitivity supports a wide range of monitoring requirements.
0–5 s adjustable trip delay enables protection coordination and selectivity.
Selectable Fail Safe and automatic reset functions provide flexible system configuration.
Designed for use with compatible ABB TR-series toroidal transformers.
Key Features
ABB ELR residual current relay series.
Type A residual current detection.
24–48 V AC/DC auxiliary supply.
0.03–30 A adjustable residual current sensitivity.
0–5 s adjustable operating delay.
Fail Safe function selectable by configuration.
Automatic or manual reset selectable by configuration.
Front-mounted TEST and RESET pushbuttons.
ON and FAULT LED status indication.
5 A at 250 V output contact capacity.
Compatible with ABB TR-series external toroidal transformers.
Complies with IEC/EN 60947-2 Annex M.
Compact and Adjustable Earth Leakage Monitoring
The ABB ELR48V24P operates with an external toroidal transformer through which the active conductors of the protected circuit are routed. Under normal operating conditions, the vector sum of the currents through the toroid is effectively zero. An insulation fault or leakage to earth creates a residual current imbalance, which is detected by the toroidal transformer and transmitted to the ELR48V24P.
The monitor compares this residual current with the selected sensitivity setting and operates its output contact when the configured threshold and time delay conditions are reached. With sensitivity adjustable between 0.03 and 30 A, delay adjustable up to 5 s and selectable Fail Safe and automatic reset functions, the ELR48V24P provides flexible residual current monitoring for commercial and industrial low-voltage systems.
Typical Applications
Industrial low-voltage distribution systems.
Compact electrical switchboards and distribution panels.
Industrial control panels using 24–48 V auxiliary supplies.
Machinery and automation systems.
Earth leakage monitoring with ABB TR-series toroidal transformers.
Protection systems incorporating suitable MCBs or MCCBs and tripping accessories.
Technical Specifications
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Time Delay
Adjustable
Monitored Supply
AC/DC
Monitoring Function
Earth leakage / residual current
Product group
Earth Monitoring Devices
Series
ELR Residual Current Relays
ABB order code
2CSG452211R1202
Product type
Residual current monitor / electronic residual current relay
Residual current type
Type A
Application
Low-voltage residual current and earth leakage monitoring
Function
For mixed systems
Rated voltage
24–48 V
Auxiliary supply voltage
24–48 V AC/DC
Auxiliary supply tolerance
±20%
Frequency
50–60 Hz
Residual current sensitivity
0.03–30 A adjustable
Trip delay
0–5 s adjustable
Output contact capacity
5 A at 250 V
Maximum consumption
3 VA
Fail Safe function
Selectable
Automatic reset
Selectable
Pre-alarm threshold
No
Sensor type
External ABB TR-series toroidal transformer
Mounting type
Front-panel mounting
Front dimensions (H × W)
48 × 48 mm
Panel cut-out
45 × 45 mm
Protection rating
IP52 front with cover; IP40 front; IP20 terminals
Operating temperature
-10 to +60 °C
Storage temperature
-20 to +70 °C
Maximum relative humidity
≤95%
Terminal conductor capacity
2.5 mm²
Standard
IEC/EN 60947-2 Annex M
Weight
approx. 120 g
EAN
8012542734826
Frequently Asked Questions
What is the ABB ELR48V24P used for?
The ABB ELR48V24P is a compact Type A residual current monitor and relay used with an external toroidal transformer to monitor earth leakage and provide residual current protection for low-voltage electrical distribution systems.
What residual current range can the ABB ELR48V24P monitor?
The ELR48V24P provides adjustable residual current sensitivity from 0.03–30 A, allowing the operating threshold to be configured for different applications.
What supply voltage does the ABB ELR48V24P require?
The ELR48V24P operates from a 24–48 V AC/DC auxiliary supply with a ±20% supply tolerance.
Does the ABB ELR48V24P require a toroidal transformer?
Yes. The ELR48V24P is designed for use with a compatible ABB TR-series external toroidal transformer, which detects residual current imbalance in the protected conductors.
What are the mounting dimensions of the ABB ELR48V24P?
The ELR48V24P has a compact 48 × 48 mm front-panel format and requires an approximately 45 × 45 mm panel cut-out.
Trusted ABB Earth Leakage Monitoring
ABB ELR residual current relays provide configurable earth leakage monitoring for low-voltage distribution networks, with the compact ELR48V24P combining Type A detection, a 24–48 V AC/DC supply and adjustable sensitivity and delay settings for industrial and commercial protection systems.
Time Delay
Adjustable
Monitored Supply
AC/DC
Monitoring Function
Earth leakage / residual current
Product group
Earth Monitoring Devices
Series
ELR Residual Current Relays
ABB order code
2CSG452211R1202
Product type
Residual current monitor / electronic residual current relay
Residual current type
Type A
Application
Low-voltage residual current and earth leakage monitoring
Function
For mixed systems
Rated voltage
24–48 V
Auxiliary supply voltage
24–48 V AC/DC
Auxiliary supply tolerance
±20%
Frequency
50–60 Hz
Residual current sensitivity
0.03–30 A adjustable
Trip delay
0–5 s adjustable
Output contact capacity
5 A at 250 V
Maximum consumption
3 VA
Fail Safe function
Selectable
Automatic reset
Selectable
Pre-alarm threshold
No
Sensor type
External ABB TR-series toroidal transformer
Mounting type
Front-panel mounting
Front dimensions (H × W)
48 × 48 mm
Panel cut-out
45 × 45 mm
Protection rating
IP52 front with cover; IP40 front; IP20 terminals
Operating temperature
-10 to +60 °C
Storage temperature
-20 to +70 °C
Maximum relative humidity
≤95%
Terminal conductor capacity
2.5 mm²
Standard
IEC/EN 60947-2 Annex M
Weight
approx. 120 g
EAN
8012542734826
No documents available for this product.
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