Generator Protection
GE's generator protection devices provide innovative solutions for the protection, control and monitoring of generator assets. Generator protection is critical to maintaining maximum uptime in the generating facility and providing vital protection of the generating unit. From the protection and control of utility generators to ensuring safe interconnection of renewable energy sources, to synchronization and load shedding solutions using advanced automation, GE maximizes asset reliability and operational life.
Interactive Selector Guide
Large Size Generators (>40MVA)
Multilin UR protection and control relay platform
Multilin G60
The G60, a member of the UR family of protection relays, provides ultimate protection for AC generators. Provides 100% stator ground fault by low frequency injection (GPM-S module required) and field ground fault protection (GPM-F module required). It offers a large color LCD display, integrated PMU and process bus and is on the US Government GSA schedule.
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MiCOM P34x Agile
The P34x models, members of the MiCOM P40 Agile family of protection relays, offer cost effective protection for AC generators. They can provide 100% stator ground fault by low frequency injection (P345, GPM-S module required) and field ground fault protection (P391 module required).
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Small to Medium Size Generators (< 40MVA)
Multilin 889
The 889, a member of the 8 series family of protection relays, has been designed for industrial customers and small to medium utility generators. It offers a large color LCD display and Wi-Fi connectivity to configure settings and retrieve records.
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Ground Protection
Multilin GPM-S
The GPM-S is a Stator Ground Protection Module that provide 100% stator ground fault protection during generator start-up, running and stopped conditions. It is based on sub-harmonic injection of a 20Hz voltage to continuously monitor the integrity of the stator windings. The GPM-S can be used with either of the Multilin G60 or the MiCOM Agile P345 relays.
Multilin GPM-F
The GPM-F is a Ground Protection Module for monitoring the generator field/rotor windings. Working in combination with the Multilin G60 relay, the GPM-F provides detection of ground faults in the field winding of the generator. The device can be used for either single point or double point injection based on application requirements.
Special Applications
Multilin UR protection and control relay platform
Multilin G30
Protection of small to medium sized generators, including unit transformer protection, part of the UR family of protection relays. It offers a large color LCD display, integrated PMU and process bus.
MiCOM P341 Agile
Provides distributed generator interconnection protection and dynamic line rating protection, part of the P40 Agile family of protection relays.
Transformer Protection
GE's transformer protection devices provide innovative solutions for the protection, control and monitoring of transformer assets. Transformers have become an essential component for high voltage power transmission, ensuring long distance transmission of power is economically practical. GE's transformer protection solutions enhance transformer reliability through special techniques and methods to increase the life of transformers.
Extend transformer life, optimize capital expenditure and improve reliability of service by implementing a preventative asset maintenance and management tool using GE's Multilin T60, T35, 845, 745 and 345 as well as MiCOM P64x.
Learn more about this spotlight application.
Interactive Selector Guide
Power Generation & Transmission
Multilin UR protection and control relay platform
Multilin T60
The T60, a member of the UR family of protection relays, cover two and three windings transformers, with two to five windings transformer protection including interturn protection. It offers a large color LCD display and integrated PMU.
MiCOM P542/3/5 Agile
MiCOM P642/3/5 Agile
The various P64x models, part of the MiCOM P40 Agile family of protection relays, cover two and three windings transformers (including auto-transformers), providing cost effective two to five windings protection. Modular range in 4U high, 40TE (4”) 60TE (6”) and 80TE (8”) width.
Distribution & Industry (>5MVA)
Multilin 845
Multilin 845
The 845, a member of the 8 series family of protection relays, has been designed to provide comprehensive protection of transformers with two or three windings. Integrated transformer M&D with GE Dissolved Gas Analyzer (DGA) and advanced health report.
Distribution & Industry (<5MVA)
Multilin 345
Multilin 345
The 345 is ideal for protecting small and medium size, 2-winding, distribution transformers. It is available with and without draw out.
Special Applications
Multilin UR protection and control relay platform
Multilin T35
Cost effective transformer protection for up to six windings from the UR family of protection relays. Effective current based back-up protection for distribution. It offers a large color LCD display and process bus.
P50 Agile P652
P50 Agile P652
The P652 is a dedicated protection relay intended for optimized protection of two winding transformers. It is an economical choice, designed for deployment in volume, for distribution or industrial applications typically.
MiCOM P543/4/5/6 Agile
The P543, P544, P545 & P546 models, part of the MiCOM P40 Agile family of protection relays, constitute a cost effective range of transmission-class protection relays providing comprehensive line differential protection for 2 or 3 line ends, subcycle distance and directional earth fault protection. This range of products is ideal for HV, EHV and UHV applications on lines and cables of any length for 1 or 2 CB applications with neutral differential for high impedance faults.
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Multilin UR protection and control relay platform
Multilin L90
The L90, a member of the UR family of protection relays, is a transmission-class protection relay providing comprehensive line differential protection for 2 or 3 line ends, subcycle distance and directional earth fault protection. It is ideal for HV, EHV and UHV applications on lines and cables of any length for 1 or 2 CB applications. It offers a large color LCD display and integrated PMU.
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Line Differential with Distance - Distribution
MiCOM P54A/B/C/E Agile
MiCOM P54 A/B/C/E Agile
The P54A/B/C/E models, part of the MiCOM P40 Agile family of protection relays, provides cost effective high speed multi-ended line differential protection for overhead line and cables up to 6 ends. The P54C and P54E support a high density of binary inputs/outputs, while the P54A and P54B offer compact line differential protection in a half-rack case.
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Distance Protection
MiCOM P443, P446 Agile
MiCOM P443, P446 Agile
The P443 and P446 models, part of the MiCOM P40 Agile family of protection relays, constitute a range of transmission-class protection relays that provide subcycle, 6 to 9 zone, distance protection with mho/quad characteristics, delta directional comparison (incremental) protection and “Virtual current polarising” of Directional Earth/Ground Fault (DEF) and settings free PSB for 1 or 2 CBs.
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MiCOM P441, P442, P444 Agile
MiCOM P441, P442, P444 Agile
The P441, P442 and P444 models, part of the MiCOM P40 Agile family of protection relays, are numerical distance relays that provide flexible, fast and reliable protection of transmission and sub-transmission lines. They include full scheme 5-zone distance protection with quad characteristics, plus directional earth fault (DEF) for single breaker applications.
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Multilin UR protection and control relay platform
Multilin D60
The D60, a member of the UR family of protection relays, offers transmission-class protection that provides subcycle, 6 zone, distance protection with mho/quad characteristics and Directional Earth/Ground Fault (DEF) for 1 or 2 CBs. It offers a large color LCD display and integrated PMU.
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Railway Catenary
MiCOM P44T Agile
MiCOM P44T Agile
The P44T provides protection for railway catenary lines, supplementing a 5 zone distance main protection are a host of backup protection, thermal protection, recording, control, measurement and monitoring features. Wrong phase coupling, panto flash over, train startup and Delta I for high impedance faults protection are also included. With independently settable right and left hand side resistive reaches for each zone the P44T suits routes hosting regenerative braking trains. Protection of classic or auto transformer-fed catenaries in systems with nominal frequencies of 50 or 60 Hz.
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Special Applications
Multilin UR protection and control relay platform
Multilin L30
Current differential protection for sub-transmission and MV lines and cables. Part of the UR family of relays. Includes voltage based protection, metering and check synchronizing. It offers a large color LCD display, PMU and advanced Ethernet communications with IEC 61850 station and process bus.
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MiCOM P541, P542 Agile
MiCOM P541, P542 Agile
Current differential protection for sub-transmission and MV lines and cables. Part of the MiCOM family of relays. Available in a compact cases, 40TE (P541) or 60TE (P542).
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Multilin UR protection and control relay platform
Multilin L60
The L60, a member of the UR family of protection relays, provides comprehensive phase comparison line protection including 3 zone distance protection. It offers a large color LCD display.
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MiCOM P547 Agile
MiCOM P547 Agile
The P547, a member MiCOM P40 Agile family of protection relays, provides comprehensive phase comparison line protection including subcycle 5 zone distance protection with distance and DEF signaling schemes.
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Multilin UR protection and control relay platform
Multilin D30
5 zone distance protection with quad/mho characteristics for 3 pole tripping and autoreclose. Part of the UR family. Primary protection for sub-transmission lines, backup protection for MV to EHV lines. It offers a large color LCD display and integrated PMU.
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Multilin UR protection and control relay platform
Multilin C70
The C70 provides both the bank and system protection schemes for shunt capacitor banks. The current and voltage-based protection functions provide sensitive protection for grounded, ungrounded single, and parallel capacitor banks and banks with taps.
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MiCOM P841 Agile
MiCOM P841 Agile
Provides control and back-up protection in transmission and sub-transmission feeder bays, together with single or dual breaker and 1/3 pole autoreclose logic schemes and synchro check.
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MiCOM P842 Agile
MiCOM P842 Agile
Provides a distributed scheme for delayed auto-reclose (DAR) and auto-isolation of a mesh bus station, using high-speed real time peer-peer communication over Ethernet.
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Accessories
MiCOM P59x Agile
MiCOM P59x Agile
This range of standalone units enables the MiCOM Agile P54x current differential relays and MiCOM relays with InterMiCOM64 inter relay communications to be connected to remote pulse code modulation (PCM) multiplexing equipment.
Multilin B30
The B30, a member of the UR family, provides busbar protection for up to 16 feeders with 6 differential zones. Communication between bay and central units is done using Process Bus (IEC 61850-9-2LE) or standard (IEC 61869) protocols. It offers a large color LCD display. It can also be used for centralized protection for MV substations requiring busbar, breaker fail and feeder phase/neutral/ground overcurrent and under/overvoltage protection.
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MiCOM P741/2/3 Agile
Part of the MiCOM P40 Agile family of relays, consisting of the Agile P741 central unit and P742 and P743 peripheral units, the P74x Agile is engineered to provide a traditional distributed architecture for busbar protection with CT saturation detection and dynamic topology processing algorithms. It can accommodate up to 8 zones (plus a check zone) and up to 28 terminals.
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Centralized Bus Protection
Multilin UR protection and control relay platform
Multilin B90
Comprehensive and scalable bus and breaker fail protection for LV, HV and EHV busbars. The B90, a member of the UR family, supports multi-section busbars schemes of up to 24 feeders and 6 zones. It offers a large color LCD display.
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MiCOM P747 Agile
The P747 Agile relay, a member of the MiCOM P40 Agile family, provides complete protection up to extra high voltage busbar configurations. It can accommodate up to 4 zones (plus check zone) and protect up to 18 feeders. The P747 Is particularly useful in double busbar with double bus coupler applications due to its high number of I/Os.
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MiCOM P746 Agile
The P746 Agile, a member of the MiCOM P40 Agile family, provides an easy to engineer solution for smaller size MV and HV busbar configurations with up to 2 zones (plus a check zone) and up to 6 feeders (1 box) or 18 feeders (3 boxes, 1 per phase). It can also be used with process bus in 1 box applications.
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High Impedance Bus Differential
MiCOM P145 Agile
The MiCOM P145 numerical relay provides fast and reliable high impedance busbar differential protection. The P145 provides voltage and current based buswire supervision with 10 function keys, 18 programmable LEDs and 16I/16O for busbar protection scheme logic, control and indications.
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MiCOM P14NB Agile
The MiCOM P14NB numerical relay provides fast and reliable high impedance busbar differential protection in a compact case. The P14NB provides current based buswire supervision with 8I/8O and 4 programmable LEDs for busbar protection scheme logic, control and indications.
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MCAG
The MCAG electromechanical relays provides fast and reliable high impedance busbar differential protection. Settings are in amps.
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MFAC
The MFAC electromechanical relays provides fast and reliable high impedance busbar differential protection. Settings are in volts.
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MVTP
The MVTP provides continuous voltage supervision of the buswires in high impedance busbar protection schemes to detect open-circuited buswires as well as open-circuited main current transformers.
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HID
The HID module provides stabilizing resistors together with voltage limiters (MOVs) to achieve high impedance differential protection with MiCOM P14x numerical relays. External Metrosils and stabilizing resistors used with the MCAG/MFAC relays for high impedance differential protection can also be used with the P14x relays.
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Accessories
KITZ 274
The KITZ 274 provides conversion between K-BUS ports to adapt P74x relays to IEC 60870-5-103 protocol
