Schneider Electric PowerLogic™ A125 Arc Flash Protection Relay

The Schneider Electric PowerLogic™ A125 Arc Flash Protection Relay is a compact protection device designed to reduce the impact of arc flash faults in low and medium-voltage switchgear. It provides fast arc fault detection using optical sensors and initiates rapid tripping to help minimise equipment damage and improve personnel safety.

The relay supports up to four optical light sensors, allowing multiple protection zones to be monitored from a single device. By combining light detection with an optional current verification input, the A125 helps distinguish genuine arc flash faults from external light sources, reducing the possibility of unwanted tripping.

Its compact design, wide auxiliary power supply range and flexible mounting options make the PowerLogic A125 suitable for both new electrical installations and retrofit projects. The relay can be installed in switchboards, motor control centres and electrical panels where dependable arc flash protection is required.

Specifications

• Manufacturer: Schneider Electric
• Product Family: PowerLogic™ A1
• Model: A125
• Relay Type: Arc Flash Protection Relay
• Protection Application: Low and Medium-Voltage Switchgear
• Protection Technology: Optical Arc Flash Detection
• Arc Sensor Capacity: Up to 4 Optical Light Sensors
• Detection Zones: Multi-Zone Arc Flash Protection
• Current Verification Input: Available
• Auxiliary Supply Voltage: 48 VAC to 240 VAC or 48 VDC to 240 VDC
• High-Speed Trip Output: 1
• Relay Output: 1
• Mounting Options: DIN Rail or Flush Panel (with mounting frame)
• Human Machine Interface: DIP Switch Configuration and LED Status Indicators

Features

• Fast arc flash detection for low and medium-voltage electrical systems.
• Supports up to four optical arc sensors for multi-zone protection.
• Current verification input helps prevent unnecessary tripping caused by external light sources.
• High-speed trip output reduces arc flash energy and equipment damage.
• Compact design for easy installation inside electrical panels.
• Wide auxiliary power supply range for greater installation flexibility.
• DIN rail and flush panel mounting options.
• Simple configuration using DIP switches.
• Suitable for new installations and retrofit applications.
• Reliable operation for industrial, commercial and utility environments.

Applications

• Low-voltage switchboards
• Medium-voltage switchgear
• Motor control centres
• Utility substations
• Industrial manufacturing plants
• Oil and gas facilities
• Mining operations
• Water and wastewater treatment plants
• Commercial buildings
• Critical power distribution systems

The Schneider Electric PowerLogic™ A125 Arc Flash Protection Relay provides a practical and dependable solution for reducing the effects of arc flash faults. Its fast response, multi-zone protection capability and straightforward installation make it a suitable choice for protecting electrical equipment and improving personnel safety in a wide range of power distribution applications.