Explore GE Vernova
Resource Library
Get access to curated content, tools, and useful resources to help you face all your grid challenges.
Access the library
Electrification Businesses
Electrification Software
Power Conversion
Solar & Storage Solutions
Category banner
Banner image
Automation & Control
Fault Recorders &

Home > Grid Automation > Automation & Control > Fault Recorders & PMUs

Multilin N60
Network Stability and Synchrophasor Measurement System

The N60 network stability and synchrophasor measurement system is a flexible device intended for the development of load shedding, remedial action, special protection schemes and wide area monitoring and control. Like no one device before, the N60 shares real-time operational data to remote N60s so the system can generate intelligent decisions to maintain power system operation.

Key Benefits

  • Scalable synchrophasor measurements with up to 6 PMUs per IED reducing synchrophasor cost by up to 80%
  • Advanced IEC 61850 Ed. 1 and Ed. 2 certified implementation, complete settings via SCL files and flexible process bus support (IEC 61850-9-2LE or IEC 61850-9-2 Hardfiber) ensures interoperability, device managing optimization and reduced cost of ownership
  • Routable GOOSE (R-GOOSE) enables GOOSE messages going beyond the substation, which enables wide area protection and control applications
  • Exceeds the IEEE C37.118 standard for PMU measurement devices with a TVE of less than 1%, Protection and Metering class synchrophasors and multi-cast IEC 61850-90-5 support
  • Uninterrupted synchrophasor measurements during fault and disturbances providing highly reliable capture of data for critical control functions and postmortem analysis
  • Three independent fiber or copper Ethernet ports for simultaneous/dedicated network connections with advanced 1 microsecond time synchronization via LAN with IEEE 1588 support
  • Simplified system integration with direct connection to JungleMUX SONET, TN1U SDH and TN1Ue SDH networks
  • CyberSentry™ provides high-end cyber security aligned to industry standards and services (NERC CIP, AAA, Radius, RBAC, Syslog)
  • Supports latest edition of waveform capture (COMTRADE 2013) simplifying fault records management
  • Application flexibility with multiple I/O options including high density I/O, programmable logic, modularity, and specific customization
  • An integrated large, full color display, provides real-time visualization and control of the protected bay, via a bay mimic as well as annunciator functionality and graphical visualization of phasors


  • Decrease blackouts by identifying network instabilities and taking fast preventative action
  • Increase utilization of existing investments by identifying power transfer capability on existing lines
  • Compliments existing protection and control by sharing power and utilization information with existing systems to enhance system security
  • Facilitate contingency planning through continuous synchrophasor data collection and postmortem analysis
  • Provides enhanced state estimation for SCADA to optimize system wide load shedding and remedial action schemes
  • Mitigate system critical conditions such as power system dampening and loss of synchronism through the use of enhanced automated control to reduce outages
What's New
Protection & Control
Monitoring & Diagnostics
Software & Security
UR 1 integrated Platform across all 18 applications
Communications icon

New and Enhanced Communication Capabilities

  • New process bus module supports IEC 61869 sample values, PTP master capabilities and SV switching (FW 7.9x)
  • New UR process bus modules supporting IEC61850-9-2LE Merging Units (FW 7.8x) Module Training available here
  • Support switchable IEC 61850 Ed. 1 and Ed. 2 and redundant SNTP (FW 7.7x)
  • New UR front panel with integrated 7” color, graphical display - providing operators with enhanced situational awareness (FW 7.6x)
  • High density I/O module supporting up to 120 inputs or up to 72 contact outputs – eliminating the need for additional discrete devices (FW 7.6x)
Cyber security icon

Cyber Security - CyberSentry UR (FW v7.xx)

CyberSentryTM enables UR devices to deliver full cyber security features that help customers to comply with cyber security requirements (NERC CIP, IEEE 1686, IEC 62443, etc):

  • Secured firmware upgrade: FW file includes hash code that enables authentication prior to being used for upgrading UR Relay (FW 7.9x)
HardFiber icon

Fully Compatible with IEC 61850-9-2LE or IEC61869 process bus schemes:

  • Can connect to up to 8 merging units over -9-2LE or 61869
  • Supports PRP, HSR, dual HSR and point-to-point process bus topology
  • Provides support for GE’s IEC 61850 HardFiber Process Bus Solution
Oscillography icon

Extended Oscillography Records (FW v7.xx)

  • Increased number of digital and analog channels (FW 7.90)
  • Supports IEEE C37.111-1999/2013, IEC 60255-24 Ed 2.0 COMTRADE 2013 standard (FW v7.40)
  • Configurable events allow for records of up to 45s at 64 samples per cycle
Shield icon

New and Enhanced Protection and Control Functionality

  • New Inrush detection element (FW 8.0)
  • Expanded Bay Controller Capabilities – providing a one box solution (FW 7.6x)

Key Benefits

  • Underfrequency, overfrequency, rate of change of frequency (df/dt)and dedicated harmonic/inrush detection
  • Out-of-step tripping and power swing blocking
  • Thermal overload and phase instantaneous overcurrent
  • Synchrocheck
  • Overvoltage, undervoltage
  • FlexMath for performing automated network control for applications such as automatic load shedding, power balancing and remedial action schemes

Protection & Control

The N60 incorporates a wide range of protection and control functions that are typically required for special protection schemes. These protection and control elements along with the use of the advanced FlexLogic, FlexMath, and FlexElements, allow for creating automated system controls for customized special protection schemes.

Functional Block Diagram

N60 Block Diagram

ANSI® Device Numbers & Functions

Device Number Function
25 Synchrocheck
27P Phase Undervoltage
32 Sensitive Dir Power
49 Thermal Protection
50DD Disturbance Detector
50G Ground instantaneous overcurrent
50N Neutral instantaneous overcurrent
Device Number Function
50P Phase Instantaneous Overcurrent
51G Ground time overcurrent
51N Neutral time overcurrent
51P Phase time overcurrent
59P Phase Overvoltage
67N Neutral directional overcurrent
Device Number Function
67P Phase directional overcurrent
68 Power Swing Blocking
81O Overfrequency
81R Rate of change of Frequency
81U Underfrequency
Harmonic/Inrush detection

Key Features

  • Phasor Measurement Unit (synchrophasor) according to IEEE® C37.118 (2014) and IEC® 61850-90-5 support
  • High-speed reporting 120fps (Pclass)
  • Magnitude and phase calibration
  • Dual reporting (P & M class simultaneously)
  • Aggregation capabilities
  • Multiple configurable PMU elements (up to 6)
  • PMU recording configurable (46 channels)
  • Extended protection and control features
  • Data Logger – Up to 16 channels with sampling rate up to 1 sample/cycle

Monitoring & Diagnostics

The N60 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.

Monitoring & Diagnostics

The N60 is the single point for protection, control, metering, and monitoring in one integrated device that can easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring as shown.


FlexLogic is the powerful UR-platform programming logic engine that provides the ability to create customized protection and control schemes based on information measured locally by the N60 and received from remote N60s sent to it over the communications network. With FlexLogic, the N60 can use the status of measured inputs, along with the output of the protection elements, FlexElements and FlexMath summators, in Boolean logic equations to perform automated functions for customized special protection schemes.

FlexLogic™ and FlexMath™ diagram

The N60 contains FlexLogic and FlexMath equations that allow the creation of automated wide area protection and control schemes, remedial action schemes, and other special protection applications.

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 N60 provides advanced communications technologies for remote data and engineering access, making it the easiest and most flexible Motor protection relay 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 N60 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.

  • IEC 61850-9-2LE networked or IEC 61869 point-to-point or 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 N60 with integrated IEC 61850 to lower costs associated with generator protection, control and automation. GE’s leadership in
IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.

HardFiber system

The N60’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 N60 can also connect to GE 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:

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 N60 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 N60 into DCS, SCADA monitoring or WAM 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