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Line Protection

Home > Grid Automation > Protection Relays > Feeder Protection > P84 MiCOM 5th Generation

Related Links
  Interactive Selector Guide - Line Differential
  Interactive Selector Guide - Line Distance
  Spotlight Application
  Typical Applications
  Transmission Principles & Protection
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  Legacy Transmission Protection

P84 MiCOM 5th Generation
Multi-Functional Line Terminal Protection

The P84, part of the MiCOM P40 Agile 5th Generation family, is a multi-functional line terminal Protection that delivers high performance processing and a graphical HMI as standard. It is ideal for HV, EHV and UHV applications on lines and cables for 1 or 2 breaker applications with patented adaptive auto-reclose functionality.

Key Benefits:

  • Full suite of monitoring, control and recording capabilities plus fault locator.
  • Multi-shot autoreclosure with check synchronism - adaptive technology to detect fault arc extinction and accelerate the dead time or drive to lockout for persistent faults
  • Transmission-class circuit breaker failure protection (< 3/4 of a cycle)
  • Harsh environment coating as standard for all GE’s MiCOM P40 relays protects against corrosive gases such as H2S or SO2
  • No internal batteries in GE-branded models – removes a maintenance item and eases air-freight logistics
  • CyberSentryTM  Advanced Security including AAA, Radius, RBAC, and Syslog
  • IEC 61850 9-2LE Process Bus capability with PRP in all models
  • Secure Data vault with 5000 events, 100 Fault records and over 1000s of Oscillography
  • Binary inputs ESI48-4 EB2 compliant
What's New

What's New

MiCOM P40 Agile Explorer


Transmission and distribution systems are essential for the safe, sure routing of power from generation sources to consumers. However, exposed overhead lines transporting power are by nature sometimes vulnerable and prone to fault. In the case of a faulty circuit, the MiCOM range provides speedy protection to trip and isolate it, thereby preventing further damage. Each relay model contains a complete suite of backup protection elements covering all current, voltage and frequency applications. This permits simplified application and spares holdings, because the relay can be adopted as the standard protection platform. 
The MiCOM P84 is suitable for feeders controlled by a single circuit breaker and for complex installations where feeders are controlled by two circuit breakers such as ring bus/mesh corner formations and the breaker-and-a-half configurations. 

Key Benefits

  • Extremely versatile, e.g. managing leader-follower reclosing schemes in the event of dual breaker application
  • Multi-shot 1/3pole & 3pole autoreclosure with check synchronism - adaptive technology to detect fault arc extinction and accelerate the dead time or drive to lockout for persistent faults.  Improves system stability whilst reducing OPEX.
  • Fast CB failure resetting (<3/4 cycle).
  • Same heritage as the class leading MiCOMho P44 and MiCOM P54 family of products.

Main characteristics:

  • Comprehensive communication options including IEC 61850 Edition 2
  • IEC 61850 redundant Ethernet protocols - RSTP, PRP or HSR
  • IEC 61850 9-2LE redundant PRP Process bus protocol
  • CyberSentryTM Advanced Security including AAA, Radius, RBAC, and Syslog

P84 MiCOM 5th Generation

MiCOM Multi-Functional Line Terminal Protection

Buy Now

MiCOM S1 Agile

Key benefits:

Engineering Tool Suite

S1 Agile is the truly universal PC tool for MiCOM Agile relay, assemble all tools in a palette for simple entry, with intuitive navigation via fewer mouse-clicks. No-longer are separate tools required for redundant Ethernet configuration, phasor measurement unit commissioning, busbar scheme operational dashboards, programmable curve profiles or automatic disturbance record extraction – applications are embedded. MiCOM S1 Agile supports all existing MiCOM, K-Series and Modulex, including a utility for automatic conversion of setting files from previous generations of numerical relays like K-series and MiCOM P20 to the latest P40 Agile models.

To move to the future, with no loss of functionality, no loss of device support, and full compatibility with your installed base and system architecture – request a copy of S1 Agile with the contact form link below.

MiCOM S1 Agile software

Key features in the MiCOM S1 family:

MiCOM S1 Agile software request

To receive the MiCOM S1 Agile, please use our Contact form. This will also ensure that you are kept up-to-date with the latest enhancements, including updates and bug fixes.

Refurbishment Solutions

GE’s latest P84 MiCOM 5th Generation transmission models offer a perfect functional match to our “mho” family of distance relays, from the heritage installed-base brands Alstom and Areva. The protection pedigree is maintained, optimised and advanced:

MiCOM P841A/B Relay Replacement:

Pin-Pin Upgrade Methodology: