GE Multilin 489-P5-HI-A20 Generator Management Relay
GE Multilin 489-P5-HI-A20 Generator Management Relay


The 469 Motor Management Relay
• Comprehensive motor protection plus voltage dependant overload curves, torque metering and protection, broken rotor bar protection
• Most advanced thermal model - Including multiple RTD inputs for stator thermal protection
• Minimize replacement time - Draw-out construction
• Complete asset monitoring - Temperature, Analog I/O, full metering including demand & energy
• Improve uptime of auxiliary equipment - Through I/O monitoring
• Reduce troubleshooting time and maintenance costs - Event reports, waveform capture, data logger
• Built in simulation functions simplify testing and commissioning
• Cost Effective Access to information - Through standard RS232 & RS485 serial ports, and optional Ethernet and DeviceNet Ports
• Field upgradable firmware and settings
• Optional Conformal coating for exposure to chemically corrosive or humid environments


The 489 Generator Management Relay is a microprocessor-based relay designed for the protection and management of
synchronous and induction generators. The 489 is equipped with 6 output relays for trips and alarms. Generator protection,
fault diagnostics, power metering, and RTU functions are integrated into one economical drawout package. The single line
diagram below illustrates the 489 functionality using ANSI (American National Standards Institute) device numbers
469-P1-HI-A1
469-P1-HI-A20
469-P5-LO-A1
469-P5-LO-A20
469-P5-HI-A1
469-P5-HI-A20
489-P1-LO-A1
489-P1-LO-A20
489-P1-HI-A1
489-P1-HI-A20
489-P5-LO-A1
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Removal of Existing Equipment:
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Throughout the process, it’s important to work closely with a team that includes electrical engineers, technicians, and maintenance staff. Communication is key to a successful equipment replacement. Additionally, always adhere to local electrical codes and standards to ensure compliance and safety. If the task is beyond the expertise of in-house staff, consider hiring a professional contractor experienced in industrial electrical work.
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