The MiCOM P63x series delivers fast, secure transformer differential protection for multi-winding transformers, motors, generators and complex bays — backed by rich backup functions and modular hardware that adapts to any substation
Explore MoreLegacy relays miss CT issues, mis-handle inrush, fail at multi-winding logic and can’t deliver modern redundancy or event visibility. Unstable differential protection leads to false trips, missed faults and costly outages across HV/MV substations.
The P63x family is a high-performance differential protection platform designed for transformers, generators, motors and complex bays. It brings triple-slope differential logic, fast high-set elements, multi-winding REF, thermal tracking, overfluxing protection and full backup overcurrent. With modular I/O, expandable comms and deep recording, the P63x adapts to any HV/MV substation — delivering stable, selective protection in every condition.
From multi-winding DIFF to full backup layers — P63x keeps critical assets stable and secure.
Triple-slope characteristic with two fast high-set elements reacts instantly to internal faults
Protect up to four transformer ends with matched CT compensation and secure restraint
Three independent REF elements catch internal earth faults others miss
Four DTOC and three IDMT groups cover phase, residual and negative sequence
Dual thermal models with PT100 support prevent overload damage.
V/Hz monitoring guards windings during energisation or abnormal grid conditions
CBF, CTS and VT monitoring maintain operational security across the whole bay
Modular hardware, deep logic and robust I/O — engineered to last.
Built for differential protection — fit for every complex substation
For substations that demand accuracy, speed and endurance
Designed for transformer differential protection, generator and motor differential schemes, and complex bay protection in HV and MV substations.
Compatible backup relays, communication modules, and substation protection components that enhance coordinated differential and bay-level protection schemes
Talk to our team to integrate, upgrade or modernise your substation with MiCOM P63x.
