MiCOM P34x secures generators and generator-transformer units with fast differential protection, deep backup logic and precise synchronism control — built for plants where a single mis-trip can cost megawatts.
Explore MoreLegacy relays struggle with inrush, miss internal faults, lag on breaker failures, and lack synchronism logic for modern generator bays. A slowdown becomes an outage. An outage becomes a cascade.
The MiCOM P34x family (P342 / P343 / P344 / P345 / P391) brings hardened differential protection, synchronism checks and complete scheme logic into one modular platform. Optimised for generators, GT units and complex plant bays, it blends fast 87G protection, multi-stage backup, advanced logic and rich recording. Designed for modern substations where reliability, selectivity and communication matter.
From internal faults to synchronism checks — every risk handled.
Biased differential 87G with inrush and overfluxing restraint.
Phase, earth-fault, neutral and sensitive EF with directional options.
Voltage, frequency and thermal monitoring that reacts before limits break.
Breaker failure, condition supervision and trip-circuit logic built in.
PSL for interlocking, intertripping and plant-specific sequences.
Advanced check-sync for safe, seamless breaker closing.
Waveforms, SOE, fault locator and detailed records for quicker restoration.
Every module meets generator-grade performance standards.
Any generator. Any topology. Any critical plant configuration.
Perfect for high-value generating assets across power and industry
From 87G testing to synchronism settings — we configure and validate your P34x the way your generator runs.
Complementary protection, control, and communication solutions designed to operate alongside MiCOM P34x, supporting secure synchronism, breaker supervision, and seamless integration across modern power plants and substations.
Speak to our engineers to configure, modernise or retrofit MiCOM P34x into your plant.
