Supply Voltage +
Mode +
Mounting +
Relay +
No. Of Programs +
Display +
Power Reserve +
Clock Accuracy +
Pre-Programmed +
Accessories +
Product visibility +
Analog Input +
Base/Ext +
Bazel type +
Center Distance +
Clock +
Control Action +
Display with & without +
Input/Output +
No. of digits +
No. of set points +
Output +
Output 1 +
Output 2 +
Output 3 +
Product Type +
Read Out +
Register +
RS485 Communication +
Sensor Input +
Size +
Termination +
Contact +
Delay +
Enclosure Design +
Function +
Input Voltage +
Output Current +
Output Voltage +
Power +
Relay Output +
Supply +
Timing Range +
Variant +
Alarm Output +
Analog Output +
Auto Reset time +
Auxiliary Supply +
CBCT Size +
Colour +
Current Range +
Digital Display +
Digital Input +
Digital Output +
Display Colour +
High Speed Inputs +
Input Signal +
LCD Display +
Leakage Current +
Module +
Neutral Loss +
Output Signal +
Over Frequency +
Over Voltage +
Phase Asymmetry +
Phase Loss +
Phase Sequence +
Reset +
Sensor Supply +
Series +
Settable Off Delay +
Settable On Delay +
System +
Transistor Output +
Under Frequency +
Under Voltage +
Voltage +
Earth Leakage Relay
An Earth Leakage Relay, also known as an ELR, is a crucial device used in electrical systems to detect and respond to earth leakage currents. It serves as a safety measure to protect against electric shocks and prevent potential electrical hazards.
The main function of an earth leakage protection relay is to monitor the current flowing between the live conductors and the earth. It works by continuously comparing the current entering the system with the current returning from the system. Any imbalance or leakage in the current indicates a fault, such as an insulation breakdown or an accidental connection to a conductive surface.
Why is ELR Important?
An Earth Leakage Relay, or ELR, is an essential component in electrical systems due to its vital role in providing earth leakage protection. Its importance lies in the ability to detect and respond to potentially hazardous leakage currents that can lead to electric shocks or electrical faults.
The primary reason to use an earth leakage protection relay is to enhance electrical safety. It acts as a protective measure by continuously monitoring the current flowing between the live conductors and the earth. If an abnormal current or leakage exceeding the set threshold is detected, the ELR initiates a protective action to prevent accidents or equipment damage.
Some of the features include
- Monitors, Detects and Protects Power systems from Earth Leakage Fault (Type ‘A’ & ‘AC’)
- A wide range of selectable Earth Leakage Current: 30 mA – 30 A
- Configurable Earth Leakage Trip time: 0 – 10 s
- Wide Auxiliary Supply Range: 110 – 240V AC/DC, 240-415V AC/DC
- Nano Crystalline CBCT measures the leakage current to the highest accuracy
- Instantaneous Trip for 5 times the set value of Leakage current
- Test feature to check complete product functionality
- LED Indication for Relay Status, Earth Leakage Fault & Alarm Condition
- Manual / Remote Reset feature
- Continuous Scrolling display for Set Current and Set time
- 1 C/O (Alarm Relay) + 1 C/O ( Fault Relay)
- RS 485 Communication
Applications
- Protection for LT control panels and switchboards
- Protection for Mining and Control Engineering
- Safety circuits, motor and control circuits, lighting circuits, variable-speed drives, cooling and air condition equipment, generator sets, transformers, fire and property protection in industrial facilities.
Frequently Asked Questions
Earth Leakage is an accidental situation in which a conductor carrying current touches the earth or equipment, either directly or indirectly, which can cause a current to flow to the ground. The leading causes of earth leakage are insulation failure, faulty wiring, and ageing electrical environments.
There are 3 LED’s provided
Power On – ON (Green LED)
Alarm – ON (Yellow LED) @ Alarm relay trips, at 60% of set Leakage Current
Fault – ON (Red LED) @ 85% of set Leakage Current & blink during CT open condition