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G650 Generator Protection and Control System

The G650 is a Distributed Generation Protection and Control Relay designed for complete protection of small to medium sized generators as well as operate as a control system for distributed generation interconnections. The G650 provides a cost effective and scalable solution that allows for tailoring your protection, communications, and I/O requirements to meet the needs of your specific application.

Features and Benefits
  • Ideal for Distributed Generator Applications
  • All required protection features for small to medium sized generators
  • Configurable logic for creating customized generator control schemes
  • Cost Effective and Scalable Solution
  • Basic and Enhanced Protection Options
  • Alphanumeric and Graphical User Interfaces
  • Multiple Communication options available
  • Industry Leading Fault Recording Capability
  • Large capacity Sequence of Event Recording
  • High Sample Waveform Fault recording (64 samples/cycle)
  • Long term Data Logger recording
  • Most features available in the Distributed Generation Protection market segment
  • Programmable Control Logic
  • Ethernet Communications
  • High End Fault Recording


  • Protection of small to medium sized Induction or Synchronous Generators
  • Standalone or component in automated substation control system
  • Distributed generation and interconnection protection, management, and control where programmable logic is a requirement to interact with prime mover control systems


    Protection and Control

    Basic Options
  • Phase, Neutral, Ground and Negative Sequence TOC and IOC
  • Neutral and Ground Directional Overcurrent
  • Voltage Restraint Overcurrent
  • Phase Under and Overvoltage, Neutral and Ground Overvoltage
  • Directional Power
  • Under and Overfrequency, and Frequency Rate of Change
  • Generator Thermal Model
  • Generator Current unbalance
  • Loss of Excitation
  • Inadvertent Generator Energization

  • Enhanced Options
  • Sensitive Ground Overcurrent
  • Volts/Hz
  • Power Factor limiting
  • Vector surge loss of mains detection
  • Breaker Failure
  • VT Fuse failure
  • Restricted Ground Fault


    Monitoring and Metering
  • Current, Voltage, Power, Power Factor, Frequency, Demand Metering
  • Breaker Condition Monitoring
  • Event Recorder - 479 Events
  • High resolution Oscillography and Data Logger
  • Configurable graphical HMI interface
  • Alarm Panel

  • User Interface
  • Backlit alphanumerical display or optional graphical panel
  • RS232 & RS485 ports - up to 115,200 bps
  • Ethernet ports - redundant 10/100BaseTX copper and redundant 100BaseFX Fiber
  • Multiple protocols - ModBus(TM) RTU and TCP/IP, DNP 3.0, HTTP, TFTP and IEC 61870-5-104
  • EnerVista software - an industry leading suite of software tools that simplifies every aspect of working with GE Multilin devices