G60 Relay Protection

The Multilin G60 is a high-performance generator protection relay designed for medium and large generators, offering advanced protection, monitoring, and communication capabilities.

Overview

The Multilin G60 is part of GE Vernova's UR platform and provides comprehensive protection for medium and large generators, including steam, combustion turbines, combined-cycle units, multi-circuit hydro units, and pumped storage generators without requiring CT secondary switching . It integrates advanced automation, fault recording, and communication features to enhance generator reliability and minimize downtime .

Key Protection Features

• Stator Differential Protection: High-speed, sub-cycle detection of stator phase faults with immunity to CT saturation and external disturbances .
• Stator Ground Fault Protection: Voltage differential method using third harmonic unbalance, insensitive to absolute harmonic values, with optional third harmonic undervoltage for delta-connected PTs .
• Breaker Failure Protection: Monitors timely operation of connected breakers to prevent cascading faults .
• Loss of Excitation and Reverse Power Protection: Detects generator excitation loss and reverse power flow to prevent damage .
• Over/Underfrequency and Rate-of-Change Monitoring: Ensures generator operation within safe frequency limits .
• RTD Temperature Monitoring: Supports 8 programmable RTD inputs per module, with alarm and trip levels, or remote RRTD modules for up to 12 inputs .

Communication and Integration

• Ethernet and Process Bus Support: Integrated managed Ethernet switch with 100 Mbps/1 Gbps ports, supporting IEC 61850-9-2LE, IEC 61869, PRP/HSR redundancy, and Star, Ring, or Point-to-Point topologies .
• Time Synchronization: IEEE 1588 slave or Grand Master clock support for precise event timestamping .
• Interoperability: Compatible with Merging Units (MU) from GE or other vendors compliant with IEC standards .
• Cybersecurity: CyberSentry™ features ensure compliance with NERC CIP, IEEE 1686, and IEC 62443 standards .

Additional Features

• Extensive I/O Options: Flexible analog, digital, and virtual inputs/outputs for complex control schemes .
• Fault Recording and Analysis: Powerful event and disturbance recording simplifies postmortem analysis and reduces generator downtime .
• FlexLogic™ and FlexElements: Programmable logic and custom protection schemes for tailored generator management .

Applications

The G60 is suitable for:

• Large steam and combustion turbines
• Combined-cycle generators
• Multi-circuit hydro units
• Pumped storage generators
• Systems requiring high-speed protection, advanced monitoring, and robust communication networks .

Installation and Configuration

The relay can be accessed locally via RS232 or remotely via RS485/Ethernet using EnerVista UR Setup software. Quick Connect features simplify local configuration, while modular design allows flexible I/O and process bus integration . Proper configuration is critical to ensure protection accuracy and compliance with safety standards . In summary, the Multilin G60 is a versatile, high-speed generator protection relay that combines advanced protection, monitoring, and communication capabilities, making it ideal for modern power generation systems requiring reliability, flexibility, and cybersecurity compliance .