Schneider Electric PowerLogic™ A5V121 Arc Flash Protection Relay

The Schneider Electric PowerLogic™ A5V121 Arc Flash Protection Relay is designed to provide fast and reliable arc flash protection for low and medium-voltage electrical systems. It continuously monitors optical arc sensors and current inputs to identify internal arc faults within milliseconds, helping reduce equipment damage and improve the safety of personnel working around switchgear.

Arc flash faults develop extremely quickly and can cause serious damage if they are not cleared immediately. The PowerLogic A5V121 detects the light produced during an arc event and verifies the fault using current measurement before issuing a high-speed trip signal. This rapid response helps minimise fault energy and limits the impact on switchgear and associated electrical equipment.

The relay is suitable for new installations as well as retrofit projects where additional arc flash protection is required. Its compact design, flexible sensor connectivity and simple configuration make it a practical choice for utilities, industrial facilities, commercial buildings and critical power applications.

Specifications

• Manufacturer: Schneider Electric
• Product Family: PowerLogic™ A5 Arc Protection
• Model: A5V121
• Relay Type: Arc Flash Protection Relay
• Protection Application: Low and Medium-Voltage Switchgear
• Protection Method: Optical Arc Detection with Current Verification
• Arc Sensor Support: Multiple Optical Arc Sensors
• Current Inputs: Supported
• High-Speed Trip Outputs: Supported
• Digital Inputs and Outputs: Supported
• Event Recording: Supported
• Continuous Self-Diagnostics: Supported
• Human Machine Interface: LED Status Indicators and Push Buttons
• Mounting: Panel Mounting

Features

• Fast arc flash detection for low and medium-voltage switchgear.
• Uses optical arc sensors with current verification for dependable operation.
• High-speed tripping helps reduce arc flash energy.
• Supports multiple arc flash sensor connections.
• Continuous self-monitoring improves relay reliability.
• Event recording assists with fault analysis.
• Compact design simplifies installation in new and existing panels.
• Quick commissioning with user-friendly settings.
• LED indicators provide clear operating and fault status.
• Designed for reliable operation in demanding industrial environments.

Applications

• Medium-voltage switchgear
• Low-voltage switchboards
• Utility substations
• Industrial electrical distribution systems
• Manufacturing plants
• Oil and gas facilities
• Mining operations
• Data centres
• Water and wastewater treatment plants
• Critical infrastructure

The Schneider Electric PowerLogic™ A5V121 Arc Flash Protection Relay delivers rapid arc fault detection and dependable protection for electrical distribution systems. Its combination of optical sensing, fast tripping and straightforward integration helps improve switchgear safety while reducing the risk of equipment damage and extended downtime.