Multilin L60

Key Features

• Line current differential with adaptive restraint
• Stub bus protection
• Breaker failure
• Three-pole autoreclose
• Underfrequency protection
• Phase directional overcurrent, neutral directional with dual polarity criteria, broken conductor and thermal overload
• Non-directional overcurrent: phase, neutral and negative sequence
• Phase over/under voltage, negative sequence overvoltage
• Two independent synchronism check elements

Protection & Control

The L60 is an advanced sub-cycle phase comparison relay intended for application on overhead transmission lines, including series-compensated lines, and underground cables of different voltage levels. Two and three-terminal lines can be protected easily by interfacing to new or existing power line carrier equipment. The L60 also has built-in interfaces to support communication channels of various types between line terminals. Part of the Universal Relay family, the L60 comes with a variety of versatile features, truly integrating protection, monitoring, metering, communication and control in one easy-to-use device. 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.

Functional Block Diagram

ANSI® Device Numbers & Functions

Key Features

• Breaker condition monitoring including breaker arcing current (I2t) and trip counter
• Metering - current, voltage, power, energy and frequency
• Oscillography - 64 samples/cycle, up to 64 records
• 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

Monitoring & Diagnostics

Advanced Automation

The L60 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average line differential relay. The L60 integrates seamlessly with other UR relays for complete system protection.

Key Features

• 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” support

Advanced Communications

The L60 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 L60 supports the most popular industry standard protocols enabling easy, direct integration into monitoring and SCADA systems.

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 L60 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 L60 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. 

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