Multilin L30
Line Current Differential System
The L30 is a cost-effective line current differential protection relay intended for sub-transmission and medium voltage lines and cables providing reliable and secure operation even under the worst case power system conditions. The L30 provides secure high-speed fault detection and clearance suitable for three-pole tripping applications. The L30 supports inter-relay communications via direct fiber as well as standard RS422, G.703 and C37.94 telecommunication interfaces. The L30 also provides synchrophasor measurements over Ethernet per IEEE C37.118. Key Benefits
Applications
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New and Enhanced Communication Capabilities
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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):
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Fully Compatible with IEC 61850-9-2LE or IEC61869 process bus schemes:
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Extended Oscillography Records (FW v7.xx)
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New and Enhanced Protection and Control Functionality
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Key Features
Protection & Control
The L30 is a cost-effective line current differential protection relay intended for sub-transmission and medium voltage lines and cables, providing reliable and secure operation even under the worst case power system conditions. The L30 provides secure high-speed fault detection and clearance suitable for three-pole tripping applications. Part of the Universal Relay family, the L30 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
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Key Features
Monitoring & Diagnostics
Advanced Automation
The L90 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average line relay. The L90 integrates seamlessly with other UR relays for complete system protection.
Key Features
Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P & C life cycle costs
Advanced Communications
The L30 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 L30 supports the most popular industry standard protocols enabling easy, direct integration into monitoring and SCADA systems.
Interoperability with Enbedded IEC 61850
Use the L30 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.
The L30’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 L30 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:
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 L30 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 L30 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