P44 MiCOMho 5th Generation

Line Distance Protection

The P44, part of the MiCOM P40 Agile 5th Generation family, is a line distance Protection that delivers high performance processing and a graphical HMI as standard and provides up to 9 zones of subcycle distance protection with both mho/quad characteristics and delta directional comparison (incremental) protection.
In addition, distance phase preference tripping logic and transient earth fault detection (TEFD) for Petersen coil earthed and isolated systems. The P44 range of products 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:

Integrated full color display, for single-line diagram control of the protected bay.
True subcycle distance protection with up to 9 fully directional distance zones for transmission class security and dependability
Load blinder prevents spurious trips cascading through the network in extreme conditions such as on the verge of a blackout
Distance phase preference tripping logic and transient earth fault detection (TEFD) for Petersen coil earthed and isolated systems
Unparalleled speed, security and selectivity
With fast start up time of less than 10s, resulting in protection, control and communications without the need to wait
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
Harsh environment coating as standard for all GE Vernova\’s MiCOM P40 relays protects against corrosive gases such as H2S or SO2
No internal batteries in GE Vernova-branded models – removes a maintenance item and eases airfreight logistics
Advanced Cybersecurity 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
Advanced IEC 61850 Edition 2.1 implementation
Dedicated RJ45 Ethernet port for engineering access by protection engineers/operators

Interactive Selector Guide - Line Differential

Interactive Selector Guide - Line Distance

Spotlight Application

Typical Applications

Transmission Principles & Protection

GSA Schedule

Legacy Transmission Protection

Brochures

Manuals

Specifications

Support Documents

Interactive Selector Guide - Line Differential

Interactive Selector Guide - Line Distance

Spotlight Application

Typical Applications

Transmission Principles & Protection

GSA Schedule

Legacy Transmission Protection

Brochures

Manuals

Specifications

Support Documents

P44 MiCOMho 5th Generation

Line Distance Protection

Key Benefits:

Integrated full color display, for single-line diagram control of the protected bay.
True subcycle distance protection with up to 9 fully directional distance zones for transmission class security and dependability
Load blinder prevents spurious trips cascading through the network in extreme conditions such as on the verge of a blackout
Distance phase preference tripping logic and transient earth fault detection (TEFD) for Petersen coil earthed and isolated systems
Unparalleled speed, security and selectivity
With fast start up time of less than 10s, resulting in protection, control and communications without the need to wait
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
Harsh environment coating as standard for all GE Vernova\’s MiCOM P40 relays protects against corrosive gases such as H2S or SO2
No internal batteries in GE Vernova-branded models – removes a maintenance item and eases airfreight logistics
Advanced Cybersecurity 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
Advanced IEC 61850 Edition 2.1 implementation
Dedicated RJ45 Ethernet port for engineering access by protection engineers/operators

What's New

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

Functional Block Diagram

ANSI ® Device Numbers and Functions

Device Number	Function
25	Check Synchronizing
27	Pand & Line Undervoltage
37	Undercurrent
46	Negative Sequence Overcurrent
49	Thermal Overload
50	Phase Definite Time Overcurrent
51	Phase Inverse-Time Overcurrent
52	Circuit Breaker Control
59	Phase & Line Overvoltage
67	Directional Phase Overcurrent
68	Power Swing Blocking
78	Out-of-Step Tripping
78DC	Delta (Incremental) Protection
79	Autoreclose/Adaptative Autoreclose

Device Number	Function
85	InterMiCOM Teleprotection
86	Latching/Lockout Contacts
21BL	Load Encroachment/Blinder
21FL	Fault Locator
21G	Ground Distance
21P	Phase Distance
46BC	Broken Conductor
50/27	Switch-on to Fault
50BF	CB Failure
50N	Earth Fault Definite Time Overcurrent
50ST	Stub Bus Protection
51N	Neutral/Ground IDMT Overcurrent
59N	Neutral Voltage Displacement
59R	Remote End Overvoltage

Device Number	Function
64N	Restricted Earth Fault
67N	Directional Neutral/Ground Overcurrent
81df/dt	Rate of Change Frequency
81O	Overfrequency
81U	Underfrequency
CTS	CT Supervision
PSL	Programmable Logic
SEF	Sensitive Earth Fault
TEFD	Transient Earth Fault Detection
TCS	Trip Circuit Supervision
VTS	VT Supervision

P44 MiCOMho 5th Generation

P44 MiCOMho Line Distance Protection

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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.

Key features in the MiCOM S1 family:

GE Vernova’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
Single Line Diagram creation with inbuilt editor
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.

Refurbishment Solutions

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, Alstom 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