Selec ELR341 Digital Earth Leakage Relay – Panel Mount
Selec ELR-341-1 Earth Leakage Relay, 30 mA–30 A, True RMS, Panel Mount (96×96 mm)
A digital earth leakage relay with adjustable trip current, delay timers, selectable reset, CBCT compatibility, and LED indication—ideal for industrial and commercial protection panels.
The Selec ELR-341-1 is a microcontroller-based earth leakage relay designed for high-accuracy leakage current monitoring in 1-phase and 3-phase systems. With a wide trip range (30 mA–30 A), adjustable time delays, selectable reset modes, and compatibility with external CBCT sensors, it ensures reliable protection for motors, feeders, and industrial panels. The relay features a digital LED display and panel-mount design for easy integration.
Key Features
Leakage current monitoring for 1Ø (2-wire, 4-wire) and 3Ø (3-wire) systems
Compatible with external CBCT sensors (35mm to 310mm)
Adjustable trip current: 30 mA to 30 A
Multiple delay settings: Power-ON delay, Trip delay, Recovery delay
Selectable reset: Auto / Manual
Adjustable hysteresis: 5–40%
Test & Reset via front panel or remote terminals
Pre-alarm indication selectable
Red 3-digit 7-segment LED display (Page 1)
IP20 protection, suitable for control panels
Wide auxiliary supply: 90–270V AC/DC
Technical Specifications
DISPLAY & INDICATION
| Specification | Details |
|---|---|
| Display | 3-digit, 7-segment LED |
| LEDs | 2 (mA indication & Relay status) |
| Keys | 3 front keys |
| LED Behaviour | Normal ON/OFF, Trip ON, Pre-alarm blinking |
INPUT SPECIFICATIONS
| Function | Details |
|---|---|
| Measurement | Earth leakage via CBCT |
| System Compatibility | 1Ø (2-wire, 4-wire), 3Ø (3-wire) |
| Trip Range | 30 mA–30 A |
| Display Current | 15 mA–33 A |
| Time Settings | Power ON delay: 1–9999 sec; Trip delay: 0–999 sec; Recovery time: 1–99 min |
| Reset | Auto/Manual selectable |
| Response Time | <30 ms (if Trip current = 5× set value), <50 ms (if Trip = 1× set value) |
| Hysteresis | 5–40% |
| Resolution | 0.1 mA, 1 mA, 0.01 A, or 0.1 A depending on setting |
OUTPUT SPECIFICATIONS
| Parameter | Value |
|---|---|
| No. of Relays | 1 |
| Relay Type | 1 C/O (SPDT) |
| Relay Rating | NO: 5A @ 250V AC / 28V DC; NC: 3A @ 250V AC / 28V DC |
AUXILIARY SUPPLY
| Parameter | Value |
|---|---|
| Voltage | 90–270V AC/DC |
| Consumption | 4VA max |
| Frequency | 50–60 Hz |
ENVIRONMENTAL
| Parameter | Value |
|---|---|
| Operating Temp | 0°C to 55°C |
| Storage Temp | –20°C to +70°C |
| Humidity | 95% RH (non-condensing) |
| Protection | IP20 |
| Pollution Degree | PCB: 2, Product: 3 |
MECHANICAL
| Parameter | Value |
|---|---|
| Mounting | Panel mount (96×96 mm) |
| Weight | 250 g approx. |
| Depth | 56 mm |
ACCESSORIES (CBCT Options)
| CBCT Model | Inner Diameter | Ratio |
|---|---|---|
| CBCT-35-1 | 35 mm | 1000:1 |
| CBCT-70-1 | 70 mm | 1000:1 |
| CBCT-120-1 | 120 mm | 1000:1 |
| CBCT-210-1 | 210 mm | 1000:1 |
| CBCT-310-1 | 310 mm | 1000:1 |
Applications
Motor control centers (MCC)
Industrial panels & switchboards
Commercial distribution systems
HVAC, pumps, compressors
Fire hazard prevention via insulation monitoring
Protection against indirect contact and leakage paths
What’s in the Box
Selec ELR-341-1 Earth Leakage Relay
Mounting clamps
Instruction manual
Warranty information (if applicable)
FAQ
Q1: Does the ELR-341-1 work with all CBCT sizes?
Yes, it supports 35–310 mm CBCTs with a 1000:1 ratio (as listed in the datasheet on Page 2).
Q2: Can it be used on 3-phase systems?
Yes, it supports 1Ø-2W, 1Ø-4W, and 3Ø-3W systems.
Q3: What is the trip current range?
30 mA to 30 A adjustable.
Q4: What output does the relay provide?
1 SPDT relay (NO: 5A, NC: 3A).
Q5: Is pre-alarm available?
Yes, pre-alarm indication can be enabled (LED blinks).
Q6: What reset modes are available?
Manual and auto reset.