• 4-stages of non-directional/directional overcurrent, earth fault, negative phase sequence overcurrent, sensitive earth fault protection
• 2-stage under/over voltage, 9-stage under/overfrequency, check synchronism, autoreclose and breaker fail
• IEC 61850 redundant Ethernet, with RSTP and IEC 62439 PRP and HSR – with HSR support for up to 50 nodes in a ring
• Graphical programmable scheme logic eases protection scheme creation and avoids the need for external logic controllers
• Hardware modularity extends up to a maximum of 48 binary (opto) inputs
• Integrated functionality permits control of up to eight switchgear elements in the bay, in addition to circuit breaker control

Key benefits:

• Comprehensive library of hardware options, protection and control functions suitable to meet your system requirements
• Advanced autoreclose and synchronizing options, including predictive closing such that CB primary contacts touch near to the exact moment that systems drift in-phase
• The standard and user-programmable curves, supplemented by load blinders and voltage supervision offer fast and dependable fault tripping, without constraining circuit loadability
• Distance to fault location assists dispatching of maintenance crews

Functional Block diagram

• P141 Feeder management IED
• P142 Feeder management IED with autoreclose
• P143 Feeder management IED with autoreclose and synchronizing
• P144 Feeder management IED with transient earth fault detection for isolated/Petersen systems
  Manufacturing for P144 has been discontinued. As an alternative, please refer to P84.
• P145 Feeder management IED with autoreclose, synchronizing and function keys

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.

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

GE Vernova’s latest MiCOM P140 series models P141 to P145 inclusive offer an ideal path to refurbish an older installed base of MiCOM P140 relays. Whether those older products were initially sold as GE VERNOVA or AREVA-branded products, newer models retain pin-pin refurbishment capability. Advantageously, users can benefit from the advancements made in protection, control, communications, hardware and cybersecurity 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 Vernova 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

• Typical operating time of 17 ms with standard contacts
• Phase segregated biased current differential high speed busbar protection
• Easy maintenance, operation and future expansion of the busbar supported
• Deploy in ring-bus/mesh corners, single busbars, sectionalized busbars, and one per bus in breaker and a half topologies
• Adapted to all kinds of busbar configurations

Key benefits:

• 3 boxes (one per phase) for large schemes up to 18 terminals
• Interoperable with all classes of CT: IEEE, IEC, air-gapped, non-gapped, and CTs with moderate knee point voltage
• 10 integrated function keys, tri-color LEDs, and graphical programmable logic permit the creation of comprehensive schemes, tailored to your needs
• IEC 61850 redundant Ethernet, supporting self healing ring, RSTP, dual homing, PRP or HSR

Functional Block Diagram

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 Agile P747 remote PC HMI provides the following features:

• P747 Remote HMI allows the user to display the MiCOM Agile P747 measured analogue quantities and DDB (digital data bus) status information dynamically via the user defined busbar topology

Please use our Contact form to request the software.

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

GE Vernova’s latest MiCOM P747 model offers an ideal path to refurbish an older installed base of MiCOM P747 relays. Whether those older products were initially sold as GE VERNOVA or AREVA-branded products, newer models retain pin-pin refurbishment capability. Advantageously, users can benefit from the advancements made in protection, control, communications, hardware and cybersecurity 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 Vernova 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

• Differential bus protection with restrained and unrestrained functions
• Fast and reliable CT saturation detection
• Breaker failure protection
• External check-zone
• CT ratio mismatch compensation
• Dynamic bus replica
• Backup time and instantaneous overcurrent elements 
• Undervoltage function for supervision purposes

The B30 can be deployed as either centralized or distributed phase segregated scheme. As centralized Bus Bar Protection, it does not rely on extensive communications between IEDs, an approach that increases overall reliability. As distributed Bus Bar protection, the B30 uses either "61850-9-2LE or IEC61869 merging units" or "61850-9-2 Brick" as bay units. This type of scheme is superior when expecting future busbar expansions.

The B30 bus differential protection system provides secure, sub-cycle low-impedance bus protection for up to sixteen feeders and up to six busbar sections. The B30 is ideally suited for applications where high-impedance schemes were typically used. Overall system costs can be reduced with the B30, since there is no need for dedicated, or interposing, CTs. The B30 comes with advanced features, such as breaker failure, CT trouble detection, undervoltage supervision, and dynamic bus replica. With its extreme flexibility, which includes a CT ratio mismatch of up to 32:1 between terminals, the B30 is the ideal solution in a wide variety of bus differential applications.

Part of the Universal Relay family, the B30 comes with a variety of versatile features, truly integrating protection, monitoring, metering, communication and control in one easy-to-use relay. The Universal Relay family offers a high degree of modularity in its design and functionality, providing superior performance in protection and control, while meeting the toughest requirements of the marketplace.

Key Features

• Isolator and breaker status monitoring
• CT trouble monitoring, VT supervision
• Metering - current, voltage, frequency, power, energy
• Oscillography - 64 samples/cycle, up to 64 records
• Event Recorder - 1024 time tagged events, with 0.5 ms scan of digital input
• User configurable fault report
• Data logger for analog channels

Monitoring & Diagnostic

Advanced Automation

The B30 incorporates advanced automation features including powerful FlexLogic programmable logic, communication, and SCADA capabilities that far surpass what is found in the average bus relay. The B30 integrates seamlessly with other UR relays for complete system protection.

Key Features

Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P & C life cycle costs

• Three independent 100Mbps Ethernet ports enable purpose specific LAN support that eliminates latency effect of heavy traffic protocols on mission critical communication services
• Embedded IEEE 1588 time-synch protocol support eliminates dedicated IRIG-B wiring requirements for IEDs
• Direct I/O secures high-speed exchange of binary data between URs
• Increase network availability by reducing failover time to zero through IEC62439-3 PRP, HSR or dual HSR support

Advanced Communications

The Multilin B30 bus protection relay provides for secure remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available three independent and redundant Ethernet options provide the means to create fault tolerant communication architectures in an easy, cost-effective manner.

The B30 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.

• IEC 61850-9-2LE or IEC 61869 point-to-point or networked or IEC61850-9-2 Hardfiber process bus support
• DNP 3.0 (serial & TCP/IP)
• Ethernet Global Data (EGD)
• IEC 60870-5-103 and IEC 60870-5-104
• Modbus RTU, Modbus TCP/IP
• HTTP, TFTP, SFTP and MMS file transfer
• Redundant SNTP and IEEE 1588 for time synchronization
• PRP as per IEC 62439-3
• Supports Routable GOOSE (R-GOOSE)

Interoperability with Enbedded IEC 61850

Use the B30 with integrated IEC 61850 to lower costs associated with busbar protection, control and automation. GE Vernova’s leadership in IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.

The B30’s IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. 
Learn More

The B30 can also connect to GE Vernova MU320 or third-party merging units using standard IEC 61869 or IEC 61850-9-2LE communication protocols.

Cyber Security - CyberSentry™ UR (FW v7.4xx)

CyberSentry enables UR devices to deliver full cyber security features that help customers to comply with NERC CIP and NITIR 7628 cyber security requirements through supporting the following core features:

Secure FW upgrade

UR FW files v7.9 and up now include a hash code that allows for authentication prior to being used for upgrading UR devices.

Password Complexity

Supporting up to 20 alpha- numeric or special characters, UR passwords exceed NERC CIP requirements for password complexity. Individual passwords per role are available.

AAA Server Support (Radius)

Enables integration with centrally managed authentication and accounting of all user activities and uses modern industry best practices and standards that meet and exceed NERC CIP requirements for authentication and password management.

Role Based Access Control (RBAC)

Efficiently administrate users and roles within UR devices. The new and advanced access functions allow users to configure up to five roles for up to eight configurable users with independent passwords. The standard “Remote Authentication Dial In User Service” (Radius) is used for authentication. 

Event Recorder (Syslog for SEM)

Capture all cyber security related events within a SOE element (login, logout, invalid password attempts, remote/local access, user in session, settings change, FW update, etc), and then serve and classify data by security level using standard Syslog data format. This enables UR devices integration with established SEM (Security Event Management) systems.

EnerVista™ Software

The EnerVista suite is an industry-leading set of software programs that simplifies every aspect of using the B30 protection relay. The EnerVista suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the B30relay into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR setup software included with every UR relay, to carry out postmortem event analysis and ensure proper protection system operation.
Learn More

• Voltage differential protection
• Compensated bank neutral voltage unbalance
• Phase and neutral current unbalance protection, phase, ground and neutral overcurrent, thermal overload, phase and negative sequence directional overcurrent, neutral directional overcurrent with dual polarity criteria and broken conductor
• Bank phase overvoltage
• Negative sequence overvoltage
• User-programmable logic for custom schemes
• Automatic voltage regulator (AVR) for switching capacitor banks based on voltage, power factor and reactive power
• Time and date function, allowing capacitor bank switching based on time of day, week and seasons
• Capacitor control supervision block for processing commands from SCADA, and remote communication

Protection & Control

The C70 provides sensitive protection functions designed specifically to protect shunt capacitor banks effectively. The C70 provides current-based protection functions, which include phase, ground, and neutral instantaneous and time overcurrent elements for standard overcurrent protection of the bank. Two elements per configured CT bank are available. The C70 also provides breaker failure protection and standard voltage-based protection functions. Apart from the standard current and voltage-based functions, the C70 comes with protection functions specifically designed to provide sensitive protection for capacitor banks in a single box.

Applications

• Metering - current, voltage, power, energy, frequency
• Oscillography – analog and digital parameters at 64 samples/cycle
• Event Recorder - 1024 time tagged events with 0.5ms scan of digital inputs
• Data Logger - 16 channels with sampling rate up to 1 sample / cycle
• Advanced relay health diagnostics
• Setting for security audit trails for tracking changes to C70 configurations

Monitoring & Diagnostic

The C70 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.

Advanced Automation

The C70 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average capacitor bank relay. The C70 integrates seamlessly with other UR relays for complete system protection.

• Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P & C life cycle costs
• Three independent 100Mbps Ethernet ports enable purpose specific LAN support that eliminates latency effect of heavy traffic protocols on mission critical communication services
• Embedded IEEE 1588 time sync protocol support eliminates dedicated IRIG-B wiring requirements for IEDs
• Direct I/O secures high-speed exchange of binary data between URs
• Increase network availability by reducing failover time to zero through IEC62439-3 "PRP" support

Advanced Communications

The C70 provides advanced communications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Direct support for fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available three independent and redundant Ethernet options provide the means to create fault tolerant communication architectures in an easy, cost-effective manner. 
The C70 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.

• IEC 61850-9-2LE networked or IEC61850-9-2 Hardfiber process bus support
• DNP 3.0 (serial & TCP/IP)
• IEC 60870-5-103 and IEC 60870-5-104
• Modbus RTU, Modbus TCP/IP
• HTTP, TFTP, SFTP and MMS file transfer
• Redundant SNTP and IEEE 1588 for time synchronization
• PRP as per IEC 62439-3
• Supports Routable GOOSE (R-GOOSE)

Interoperability with Enbedded IEC 61850

Use the C70 with integrated IEC 61850 to lower costs associated with generator protection, control and automation. GE Vernova’s leadership in
IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.

The C70’s IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. 

Learn More

Cyber Security - CyberSentry™ UR (FW v7.4xx)

CyberSentry enables UR devices to deliver full cyber security features that help customers to comply with NERC CIP and NITIR 7628 cyber security requirements through supporting the following core features:

Secure FW upgrade

UR FW files v7.9 and up now include a hash code that allows for authentication prior to being used for upgrading UR devices.

Password Complexity

Supporting up to 20 alpha- numeric or special characters, UR passwords exceed NERC CIP requirements for password complexity. Individual passwords per role are available.

AAA Server Support (Radius)

Enables integration with centrally managed authentication and accounting of all user activities and uses modern industry best practices and standards that meet and exceed NERC CIP requirements for authentication and password management.

Role Based Access Control (RBAC)

Efficiently administrate users and roles within UR devices. The new and advanced access functions allow users to configure up to five roles for up to eight configurable users with independent passwords. The standard “Remote Authentication Dial In User Service” (Radius) is used for authentication. 

Event Recorder (Syslog for SEM)

Capture all cyber security related events within a SOE element (login, logout, invalid password attempts, remote/local access, user in session, settings change, FW update, etc), and then serve and classify data by security level using standard Syslog data format. This enables UR devices integration with established SEM (Security Event Management) systems.

EnerVista™ Software

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the C70 relay. The EnerVista™ suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the C70 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR setup software included with every UR relay, to carry out postmortem event analysis and ensure proper protection system operation. 

Learn More

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 Agile range provides speedy protection to trip and isolate it, thereby preventing further damage.

Each relay model contains multiple main protection elements: distance, delta directional incremental protection and directional earth/ground fault unit protection (DEF). This permits simplified application and spares holdings, because the relay can be adopted as the standard protection platform. 

The MiCOMho Agile P443 and P445 are suitable for feeders controlled by a single circuit breaker. The MiCOMho Agile P446 is suitable 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:

• P443 and P446: Sub-cycle fault clearance from 0.7 to 1 cycle
• Simple set mode: The relay determines its own settings from protected line data
• Power swing blocking without the need for setting
• Integral teleprotection via a MODEM, fiber or MUX channel
• Fast CB failure resetting (<3/4 cycle)
• Phase-preference tripping for cross-country earth faults in Petersen/isolated systems (P443 version 92)

MiCOM P443 Subcycle Distance & Delta Incremental Protection    Buy Now

MiCOM P445 Subtransmission Economy Distance Protection          Buy Now

MiCOM P446 Dual Breaker Subcycle Distance & Delta Protection   Buy Now

The P446 is under last-time buy. Orders may be placed until 8th October 2025 and will be fulfilled based upon availability. As an alternative, please refer to P44

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.

GE Vernova’s latest MiCOM P440 transmission models offer a perfect functional match to our “mho” family of distance relays, from the heritage installed-base brands GEC Measurements, GEC Alsthom, GE VERNOVA and Areva. The subcycle pedigree is maintained, optimised and advanced:

SHNB Micromho and SHPM Quadramho Replacement:

• Full functional compatibility

LFZP Optimho and LFZR Replacement:

• Form, fit and functional compatibility – the P443 fits in the same panel or rack space
• The same S1 Agile software supports the new MiCOM relay and the legacy LFZR

LFDC Delta Directional Comparison Relay Replacement:

• Form, fit and functional compatibility – the P443 fits in the same panel or rack space
• Implements “delta” (incremental quantity) protection schemes along with distance zones
• Half-cycle protection response possible

Overview

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 multiple main protection elements: distance, delta directional incremental protection and directional earth/ground fault unit protection (DEF). This permits simplified application and spares holdings, because the relay can be adopted as the standard protection platform. 

The MiCOMho P44 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

• Sub-cycle fault clearance from 0.7 to 1 cycle
• Simple set mode: The relay determines its own settings from protected line data
• Power swing blocking without the need for setting
• Integral teleprotection via a MODEM, fiber or MUX channel
• Fast CB failure resetting (< 3/4 cycle)
• Phase-preference tripping for cross-country earth faults in Petersen/isolated systems
• 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.

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
• Fast subcycle distance protection with quadrilateral or mho zones and setting free power swing detection
• InterMiCOM64 for transmitting digital signals (32) through teleprotection communication links
• Advanced Cybersecurity including AAA, Radius, RBAC, and Syslog

ANSI ® Device Numbers and Functions

P44 MiCOMho Line Distance Protection   Buy Now

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.

GE Vernova’s latest P44 MiCOMho 5th Generation transmission models offer a perfect functional match to our “mho” family of distance relays, from the heritage installed-base brands GEC Measurements, GEC Alsthom, GE VERNOVA and Areva. The subcycle pedigree is maintained, optimised and advanced:

SHNB Micromho and SHPM Quadramho Replacement:

• Full functional compatibility

LFZP Optimho and LFZR Replacement:

• Form, fit and functional compatibility – the P44 fits in the same panel or rack space
• The same S1 Agile software supports the new MiCOM relay and the legacy LFZR

LFDC Delta Directional Comparison Relay Replacement:

• Form, fit and functional compatibility – the P44 fits in the same panel or rack space
• Implements “delta” (incremental quantity) protection schemes along with distance zones
• Half-cycle protection response possible

MiCOMho P441/2/3/4/5/6 Relay Replacement:

• Form, fit and functional compatibility – the P44 fits in the same panel or rack space and offers the same features and Protection performance.
• The same S1 Agile software supports the new MiCOM relay and the legacy P443/5/6 and P441/2/3/4/5/6.

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 Vernova 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 medium duty 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

The MiCOM Agile P543, P544, P545 & P546 range of transmission-class protection relays provide high speed current differential unit protection. They are designed for overhead line and cable applications, interfacing readily with the longitudinal (end-end) communications channel between line terminals. The interface options support direct fiber optic or multiplexed digital links.

Each of the models offer resident subcycle distance protection to complement the powerful suite of main and backup protection. Full scheme, five-zone distance protection is adopted from the class-leading MiCOMho MiCOM Agile P443. The product line becomes the standard in all HV, EHV and UHV line protection applications, duplicated where dual redundant main protection is demanded. Set any combination of differential, distance, overcurrent and reclosing, depending on the site needs. One universal relay type instead of two or more discrete models means reduced spares holding, less training, and lower cost. 

The MiCOM Agile P544 and P546 are suitable for the complex installation and feeders controlled by two circuit breakers such as breaker-and-a-half configurations with dual breaker autoreclose logic schemes with synchrocheck for both breakers.

Key benefits:

• A universal relay that reduces spare holding - apply as a current differential relay, a distance relay, or both
• Neutral differential boosts sensitivity of tripping for resistive earth faults, even for lines with heavy load-flow 
• Transient biasing reduces CT knee point dimensioning by typically 25% compared to historical applications 
• Differential protection adaptable to all different substation topologies: in-zone transformers and unequal line end CT ratios 

Main characteristics:

• Comprehensive communication options including IEC 61850 Edition 1 and Edition 2
• IEC 61850 redundant Ethernet, supporting self healing ring, RSTP, dual homing, PRP or HSR
• Fast subcycle distance protection with quadrilateral or mho zones and setting free power swing detection
• InterMiCOM64 for transmitting digital signals through teleprotection communication links

P543 Line-Differential with Optional Subcycle Distance IED, in 60TE case 
Buy Now

Manufacturing for P544 has been discontinued. As an alternative, please refer to P54.

P545 Line-Differential with Optional Subcycle Distance IED, in 80TE case 
Buy Now

P546 Line-Differential with Optional Subcycle Distance IED, in 80TE case, suitable for two circuit breakers such as breaker-and-a-half 
Buy Now

The P546 is under last-time buy. Orders may be placed until 15^th June 2026 and will be fulfilled based upon availability. As an alternative, please refer to P54

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.

GE Vernova’s latest MiCOM P540 series models offer an ideal path to refurbish an older installed base of MiCOM P540 relays. Whether those older products were initially sold as GE VERNOVA or AREVA-branded products, newer models retain pin-pin refurbishment capability. Advantageously, users can benefit from the advancements made in protection, control, communications, hardware and cybersecurity 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 Vernova 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

LFCB and MITZ Replacement:

• GE Vernova’s P545/P546 relays and P590 interfaces fit directly into the space vacated by our legacy relays, offering a perfect functional match
• Please contact us for assistance

Protection & Control

The T35 transformer protection system is a three-phase transformer relay designed to protect power transformers with up to six windings/restraints. The T35 provides for automatic or user-definable magnitude reference winding selection for CT ratio matching. The T35 performs automatic phase shift compensation for all types of transformer winding connections. The T35 algorithm allows the user to enable removal of the zero-sequence current even for delta-connected transformer windings, facilitating transformers with a variety of grounding configurations. As part of the Universal Relay (UR) Family, the T35 provides a cost-effective solution and superior protection and control.

Functional Block Diagram

ANSI Device Numbers & Functions

Key Features

• Metering - current, voltage, power, energy, frequency, temperature
• Oscillography – analog and digital parameters at 64 samples/cycle
• Event Recorder - 1024 time tagged events with 0.5ms scan of digital inputs
• Data Logger - 16 channels with sampling rate up to 1 sample/cycle
• Setting for security audit trails for tracking changes to T35 configurations

Monitoring & Diagnostic

The T35 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.

Advanced Automation

The T35 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average transformer relay. The T35 integrates seamlessly with other UR relays for complete system protection.

Key Features

Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P & C life cycle costs

• Three independent 100Mbps Ethernet ports enable purpose specific LAN support that eliminates latency effect of heavy traffic protocols on mission critical communication services
• Embedded IEEE 1588 time-synch protocol support eliminates dedicated IRIG-B wiring requirements for IEDs
• Direct I/O secures high-speed exchange of binary data between URs
• Increase network availability by reducing failover time to zero through IEC62439-3 PRP, HSR or dual HSR support

Advanced Communications

The T35 provides advanced communications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Direct support for fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available three independent and redundant Ethernet options provide the means to create fault tolerant communication architectures in an easy, cost-effective manner. 
The T35 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.

Interoperability with Embedded IEC 61850

Use the T35 with integrated IEC 61850 to lower costs associated with power transformer protection, control and automation. GE Vernova’s leadership in IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.

The T35’s IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. Learn more

The T35 can also connect to GE Vernova MU320 or third-party merging units using standard IEC 61869 or IEC 61850-9-2LE communication protocols.

Cyber Security - CyberSentry™ UR (FW v7.4xx)

CyberSentry enables UR devices to deliver full cyber security features that help customers to comply with NERC CIP and NITIR 7628 cyber security requirements through supporting the following core features:

Secure FW upgrade

UR FW files v7.9 and up now include a hash code that allows for authentication prior to being used for upgrading UR devices.

Password Complexity

Supporting up to 20 alpha- numeric or special characters, UR passwords exceed NERC CIP requirements for password complexity. Individual passwords per role are available.

AAA Server Support (Radius)

Enables integration with centrally managed authentication and accounting of all user activities and uses modern industry best practices and standards that meet and exceed NERC CIP requirements for authentication and password management.

Role Based Access Control (RBAC)

Efficiently administrate users and roles within UR devices. The new and advanced access functions allow users to configure up to five roles for up to eight configurable users with independent passwords. The standard “Remote Authentication Dial In User Service” (Radius) is used for authentication. 

Event Recorder (Syslog for SEM)

Capture all cyber security related events within a SOE element (login, logout, invalid password attempts, remote/local access, user in session, settings change, FW update, etc), and then serve and classify data by security level using standard Syslog data format. This enables UR devices integration with established SEM (Security Event Management) systems.

EnerVista™ Software

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the T35 relay. The EnerVista™ suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the T35 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR setup software included with every UR relay, to carry out postmortem event analysis and ensure proper protection system operation. Learn More