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Automation & Protection
Motor Protection

Home > Automation & Protection > Protection & Control > Motor Protection > P24x

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  Interactive Selector Guide
  Spotlight Application
  Typical Applications
  Motor Principles & Protection
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  Legacy Motor Protection

MiCOM Agile P24x
Motor Protection

Part of the MiCOM P40 platform, the Agile P24x relays offer comprehensive motor protection, control and monitoring for both induction and synchronous motors with up to 10 RTD inputs. The relays provide enhanced diagnostics and fault analysis, optimized machine thermal image monitoring and customized thermal curves to match more closely with the machine withstand limits.

Key Features

  • Ambient temperature compensation for thermal overload protection
  • Anti backspin function to detect complete stoppage of rotor
  • Auto restart element for controlled automatic restart following supply interruption
  • Current loop analogue inputs and outputs for remote monitoring 
  • Redundant IEC 61850 Ethernet card with software switchable option between PRP/HSR/RSTP/Hot standby
  • Advanced IEC61850 Ed.2 implementation
  • No internal batteries in GE-branded models – removes a maintenance item and eases air-freight logistics
  • Binary inputs ESI48-4 EB2 compliant
  • Harsh environment protection extends the life of the product
What's New

What's New

MiCOM P40 Agile Explorer

Enhanced Ethernet board module with switchable Ethernet redundancy delivered in a single model.

It supports PRP, HSR and RSTP in one model, allowing a single P40 model to be used in any application requiring redundant Ethernet communications. The new module is designed to handle high density traffic in the IEC 61850-8-1 network, with time latency halved. Larger architecture digital substations can also be supported, with up to 50 nodes now possible in HSR rings.

Key Features & Benefits:

  • Universal IRIG-B – Modulated and demodulated supported in the same model
  • HSR Ring – Extended to 50 node support for larger substation architectures
  • Fast performance, particularly in onerous applications such as where process bus GOOSE is used for tripping purposes


  • User programmable operate/reset curves for thermal, overcurrent and earth fault protection
  • Loss of field and out of step, anti backspin and loss of load, 3 phase volt check, phase reversal, VTS and CTS
  • Comprehensive start sequence and re-acceleration scheme
  • RTD and CLIO (current-loop I/O) available as hardware options
  • 2 independent setting groups
  • Option of up to 10 RTD inputs, with a selection of different RTD types

Key benefits:

  • Programmable Scheme Logic to allow easy customization of the protection and control functions
  • Reacceleration (27LV) / low voltage ride through auto restart feature
  • Advanced post fault analysis
  • Wide choice of communication protocols (IEC 61850, IEC 60870-5- 103, Modbus & Courier)

Functional Block Diagram

P40 Agile P24xM Functional Diagram

ANSI ® Device Numbers and Functions

Device Number Function
50/51 Short Ciruit
50N/51N Earth Fault
50N/51N/67N Directionnal/Non-directionnal sensitive earth fault
32N/64N Wattmetric characteristic
50BF Breaker failure
66 Number of start limitation
37 Loss of load/Underpower
46 Negative Sequence overcurrent
32R Reverse power
47 Reverse phase sequence detection
Device Number Function
49 Thermal overload
40 Loss of field
87 Machine differential
27/59 Undervoltage/Overvoltage
47 Negative phase sequence overvoltage
27abs Anti backspin
59N Neutral voltage displacement
81U Under frequency
48/51LR Start/stalled protection/Motor reacceleration
51S Locked rotor during starting
Device Number Function
51LR Locked rotor after successful start
55 Out of step/Power factor
14 Speed switch input
RTD RTD Measurement
CTS CT Supervision
VTS VT Supervision
PSL Programmable Logic
TCS Trip Circuit Supervision

MiCOM S1 Agile

Key benefits:

  • Powerful, free of charge, PC toolsuite
  • Optimum management of the installed base, structured as per the substation topology
  • Intuitive and versatile interface with file management facilities
  • Logical structure based on substation, voltage level and bay
  • Version control and cross-checking facilities for IED settings
  • Real-time measurement visualization – MiCOM S1 Agile extends to all MiCOM Agile IEDs - including P847 PMU and busbar schemes

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:

  • GE’s integrated engineering tool that provides users with access to automation IED configuration and record data
  • Integrated configuration and monitoring features
  • Send and extract setting files
  • Event and disturbance record extraction and analysis

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.


P241 Motor Management IED

P242 Motor Management IED with Extended I/O

P243 High-speed differential protection for large motors - protects your investment

Refurbishment Solutions

GE’s latest MiCOM P240 models offer a perfect functional match for our MCHN,MCHG, MOPN and Motpro relays from the heritage installed-base brands of GEC Measurements, GEC Alsthom, Alstom and Areva:

Refurbishment Solutions – “If It’s Blue Think to Renew”

GE’s latest MiCOM P240 series models P241 to P243 inclusive offer an ideal path to refurbish an older installed base of MiCOM P240 relays. Whether those older products were initially sold as Alstom or AREVA-branded products, newer models retain pin-pin refurbishment capability. Advantageously, users can benefit from the advancements made in protection, control, communications, hardware that have taken place in the intervening years. The new P40 retains form, fit and function compatibility but delivers the latest platform and software ready for today’s environment, and for future-proofed application for the decades ahead.

Pin-Pin Upgrade Methodology:

  • Take the order code (CORTEC) of the older relay being removed, typically a blue case relay
  • Translate to today’s latest GE MiCOM model, adding Ethernet options if required
  • Order the new P40 relay
  • Extract settings and logic, use S1 Agile toolsuite to convert settings
  • Detach the terminal blocks from old relay, leaving wiring attached / detach terminal blocks from the new.
  • Carefully examine the terminal blocks to see that no physical damage has occurred since installation
  • Mount new relay. Old relay blocks fit straight onto the new relay - safer, less wiring to reconnect.
  • It is recommended to apply rated current and voltage to the relay CT/VT inputs during secondary injection testing to check the continuity of the CT/VT terminal block connections to the relay.
  • Download converted files
  • Test, return circuit to service with only minutes of downtime

Contact us for advice and support