Document revision history - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - Engineering Manual - REX640 Protection and control - Relion Protection and Control - PCL6 - IEC - ANSI

Document revision/date	Product connectivity level	History
A/2019-05-08	PCL1	First release
B/2020-02-13	PCL2	Content updated to correspond to the product connectivity level
C/2020-12-09	PCL3	Content updated to correspond to the product connectivity level
D/2023-02-13	PCL4	Content updated to correspond to the product connectivity level
E/2025-09-19	PCL5	Content updated to correspond to the product connectivity level
F/2026-02-25	PCL6	Content updated to correspond to the product connectivity level