Issue:
How can PowerLogic A3 Arc Flash protection be configured for different protection schemes and system requirements?

Product:
PowerLogic A3 Arc Flash Protection Relay

Environment:
Switchgear installations requiring flexible configuration options.

Cause:
Incorrect configuration can lead to nuisance tripping or failure to operate during an arc flash event.

Resolution:
PowerLogic A3 offers three configuration methods:

1. Rotary Switch & Push Button
• Quick setup for single devices or small systems.
• Two rotary switches set Protection Scheme (positions 1–6) and Light Group (positions 1–9).
• Push button used for Install/Reset and entering Test Mode.
• Default: Scheme #1, Light Group 1, Current Group 16.
2. eSetup Easergy Pro Software
• Requires REL52960 configuration cable.
• Allows full parameter customization: Protection Scheme, Light Group, Current Group, Output Latch.
• Supports saving/loading configuration files and advanced diagnostics.
3. ArcEM Configurator in V321
• Used when A3 operates as I/O peripheral of V321.
• Centralized configuration for large systems.
• Enables mapping of Light Groups (1–12) and Current Groups (13–16) for selective tripping.

Best Practices:

• Always verify scheme and group settings before commissioning.
• Use Test Mode to validate sensor wiring and logic without tripping breakers.
• Change default passwords for cybersecurity.

Released for: Schneider Electric USA