Protection & Control

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Multilin UR & UR Plus
Proven, State-of-the-Art Protection & Control Systems

The Universal Relay family of protection and control products are built on a common modular platform. All UR products feature high performance protection, expandable I/O, integrated monitoring and metering, high-speed communications, and extensive programming and configuration capabilities. The UR is the basis of simplified power management for the protection of critical assets.

Key Benefits

  • Modular construction via common hardware, reduced spare parts, and plug & play modules for cost savings and simplification
  • CyberSentry UR provides robust network security aligned to industry standards and services
  • Application flexibility with multiple I/O options including high density I/O, programmable logic, modularity, and specific customization
  • Advanced IEC 61850 Ed. 1 and Ed. 2 certified implementation, complete settings via SCL files and comprehensive 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
  • 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
  • Three Ethernet ports enable purpose specific LAN support, reducing latency from heavy traffic on critical communications
  • Phasor Measurement Unit (synchrophasor) according to IEEE C37.118 (2011) and IEC 61850-90-5, directly streamed from your protective device


  • Generation, transmission, distribution, motor protection, monitoring, metering & control
  • Utility substation and industrial plant automation
  • Digital fault recording and sequence of event recording
  • Predictive maintenance through data analysis and trending
  • Advanced protection, control & automation
  • New graphical front panel with advanced protection, expanded bay controller capabilities & automation
  • URPlus delivers high-end solutions for complex protection, control & automation applications
Protection & Control
Monitoring & Metering
Software & Security
Product Listing

Key Features

  • Digital Inputs: up to 120 (UR) & 115 (URPlus), single case configuration
  • Digital Outputs: up to 72 (UR) & 60 (URPlus), single case configuration
  • Solid state outputs for fast tripping
  • Transducer I/Os (RTD, dcmA)
  • Dual power supply

Protection & Control

The UR incorporates the most complete and unique protection algorithms to provide unparalleled security and system uptime. The UR selector guide (in the following pages) lists all the protection elements found in each relay. To support the protection and control functions of the UR, various types and forms of I/O are available (specific capabilities are model dependent). Supported I/Os include:

CTs and VTs

Up to 24 analog current transformer (CT) and voltage transformer (VT) signals can be configured to monitor AC power lines. Both 1 A and 5 A CTs are supported. Special function modules are available including: a CT module with sensitive ground input to provide ground fault protection on high-impedance grounded systems; and a high impedance fault detection module that provides fast and reliable detection of faults caused by downed conductors.

Digital I/O

Up to 120 digital inputs (with utility voltage rating up to 250V), and up to 72 digital outputs, are available and can be used to monitor and control a wide range of auxiliary equipment found within a substation or other protection application. Types of digital I/O cards include trip-rated Form-A, Form-C, Fast Form-C, Latching and Solid State with or without DC voltage, current monitoring and isolated inputs (with auto burnish feature). Mechanically latching outputs can be used to develop secure interlocking applications and replace mechanical switches and lockout relays. Form-A digital outputs have activation speeds of less than 4ms and both wet and dry contacts are supported. Solid state output modules with high current breaking capability, fast tripping and reset time are ideal for direct tripping applications.

Transducer I/O

RTDs and DCmA cards are available to monitor system parameters such as temperature, vibration, pressure, wind speed, and flow. Analog outputs can be used for hardwired connections from the controller to a SCADA system, to a programmable logic controller (PLC), or to other users.

D60 Block Diagram

The UR 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.

Key Features

  • Synchrophasor measurement devices (PMU) that meet IEEE c37.118 (2011) across all protection applications
  • Synchrophasor capabilities on generator, transformer, line distance, line differential and feeder applications
  • Extended Oscillography – captures extended events at 64 samples per cycle
  • Event Recorder - 1024 time tagged events, with 0.5ms scan of digital inputs
  • Data Logger - up to 16 channels with user selectable sampling rate
  • Fault locator and user-programmable fault reports
  • Breaker condition monitoring including breaker arcing current (I2t)
  • Metering - current, voltage, power, power factor, frequency

Monitoring & Diagnostics

The UR 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.

Digital fault recorder summary with the latest information on the events, faults, transients and disturbances.

Control screen for the preconfigured bay with breaker & disconnect control in multiple pages using dedicated pushbuttons in the front panel.

Advanced Automation

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

Advanced Automation

FlexLogic allows for the creation of customized logic schemes to fit most protection and control 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 reduces 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” support

Advanced Communications

The UR 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 UR 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)
  • 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
  • IRC module that combines C37.92 multimode and direct connection singlemode
  • Supports Routable GOOSE (R-GOOSE)

UR Switch Module

UR Switch Module

In addition to providing high-speed connectivity directly to your Universal Relay, the UR Switch Module provides an additional 4 fiber Ethernet ports, for connection to other relays in the system as well as upstream connectivity. It also provides 2 RJ45 copper Ethernet ports which can be used to connect local devices such as PCs, meters, or virtually anything else in the system.

The UR Switch Module provides a simple way to add fully-managed Ethernet networking to your relays and devices without the need for additional hardware or a dedicated communications cabinet.

The UR Switch Module includes all of the management and features that come with all MultiLink managed switches, and can be easily integrated into a network that has other Ethernet switches.

When used in a ring topology with other UR Switch Modules or MultiLink Switches, the UR Switch Module can be configured to use MultiLink’s Smart RSTP feature to provide industry-leading network recovery for ring topologies, at a speed of less than 5ms per switch. Learn More

Interoperability with Enbedded IEC 61850

The HardFiber Process Bus System represents a true breakthrough in the installation and ownership of protection and control systems, by reducing the overall labor required for substation design, construction, and testing. This innovative solution addresses the three key issues driving the labor required for protection and control design, construction and testing:

  • Every substation is unique making design and drafting a one-off solution for every station
  • Miles of copper wires needs to be pulled, spliced and terminated
  • Time consuming testing and troubleshooting of thousands of connections must be performed by skilled personnel

The HardFiber System was designed to address these challenges and reduce the overall labor associated with the tasks of designing, documenting, installing and testing protection and control systems. By specifically targeting copper wiring and all of the labor it requires, the HardFiber System allows for greater utilization and optimization of resources with the ultimate goal of reducing the Total Life Cost (TLC) for protection & control. Learn more

Cyber Secutrity - 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 UR. The EnerVista™ suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the UR 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

EnerVista Software


B90 - Multiple Sections Low Impedance Busbar Protection

Intended for large substations having complex-split busbar schemes, the B90 is an advanced low-impedance differential protection system.
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B30 - Multiple Sections Low Impedance Busbar Protection

The B30 is a cost effective-advanced protection system that fits busbars with up to 06 circuits and two protection zones. The B30 provides advanced elements that make the B30 and extremely fast and secure protection system.
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G60 - Medium to Large Generators

Provides comprehensive primary and backup protection for medium and large generators. Including/covering 100% stator and rotor (field) ground fault detection.
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G30 - Combined Generator & Transformer Protection

Flexible system that can be used on small and medium generators, generator and step-up transformer arrangements or backup protection of large generators.
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T60 - Medium to Large Transformers

A fully featured transformer protection system suitable for power transformers of any size that require current differential function.
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T35 - Basic Transformer Protection, Multiple CTs

Basic transformer protection system capable of protecting combined main power transformers and up to five feeders downstream.
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Transmission Line & Capacitor Bank

D60 - Fully Featured Distance Protection

The ideal solution for providing reliable and secure primary and backup protection of transmission lines.
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D30 - Backup Distance Protection

The cost-effective choice for the primary protection of sub-transmission systems or backup protection of transmission systems.
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L90 – Complete Line Protection System

Line protection system with segregated line current differential and complete distance protection.
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L60 - Line Phase Comparison Protection

Extremely fast line phase comparison system, suitable for two or three-terminal transmission lines.
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L30 - Sub-Transmission Line Current Differential Protection

A cost-effective phase segregated line current differential system, intended to provide primary protection for MV cables and two-three terminal sub-transmission lines or backup protection to transmission lines.
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C70 - Capacitor Bank Protection

An integrated protection, control, and monitoring device for shunt capacitor banks.
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Substation and Breaker Controller

C60 - Breaker Controller

The C60 is a substation hardened controller that provides a complete integrated package for the protection, control, and monitoring of circuit breakers, supporting dual-breaker busbar configurations, such as breaker-and-half or ring bus schemes.
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C30 - I/O Logic Controller

The C30 is designed to perform substation control logic that can also expand the I/O capability of protection devices and replace existing Sequence of Events (SOE) recorders.
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Distribution Feeder

F60 - Feeder Protection with Hi-Z Fault Detection

Comprehensive feeder protection, control, advanced communications, monitoring and metering in an integrated, economical, compact package and more.
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F35 - Multiple Feeder Protection

A cost-effective device for feeders primary protection
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Industrial & Network

M60 - Motor Protection

Comprehensive protection and control solutions for medium to large-sized three-phase motors.
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N60 - Network Stability and Synchrophasor Measurement

This network stability and synchrophasor measurement system is intended to be used on load shedding, remedial action, special protection and wide area monitoring and control schemes.
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