Earth Leakage Relays (ELRs) are protective devices designed to detect and interrupt leakage currents on 3-phase electrical systems that may indicate a fault condition. When an unwanted current flows from a live conductor to the earth, it can be hazardous—posing risks such as electric shock, equipment damage, or even fire. An earth leakage relay helps monitor these leakage currents and activates protective devices, such as a circuit breaker, to disconnect the supply and prevent accidents or damage. ELRs are widely used in domestic distribution boards to detect insulation failures and prevent electric shocks.
Our Range of Earth Leakage Relays:
Our type A earth leakage relays provide a multi-functional approach to system protection by incorporating both ground fault detection and overcurrent functions. With ground fault detection, these latching relays monitor the current differential between conductors and identify leakages. They ensure quick disconnection when a hazard is detected, helping to protect both people and property. Meanwhile, the overcurrent function allows the relay to safeguard against excessive currents that could cause overheating or damage to the electrical infrastructure.
Remote-Control Functionality of Our Earth Leakage Relays:
Our ELRs come with remote control functionality, which significantly enhances their usability, particularly in large industrial and commercial applications. This feature allows users to precisely monitor and control the relay from a distance, allowing greater convenience in operation and quicker response times in case of a fault. Remote monitoring also assists in preventative maintenance, enabling faster diagnostics and reducing downtime.
Typical Uses of Earth Leakage Relays:
Earth leakage relays are vital for ensuring electrical safety in various environments. Our range of type A relays is beneficial for circuits with modern electronic devices, such as variable speed drives, electric vehicle chargers, or any equipment that may generate pulsating DC components. Some typical environments where ELRs are used include:
- Residential & Commercial Buildings
- Industrial Installations
- Construction Sites
- Healthcare Facilities
- Data Centers
- Water Treatment Plants
