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GE Multilin 489-P5-LO-A20-E Generator Protection Relay
Source: | Author:kongjiang | Published time: 2024-12-04 | 7 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
GE Multilin 489-P5-LO-A20-E Generator Protection Relay ​489 GENERATOR PROTECTION SYSTEM

489 GENERATOR PROTECTION SYSTEM
Economical protection, monitoring and metering for generators
KEy BEnEFITS
• Complete, secure protection of small to medium-sized generators
• Easy-to-use generator protection system supported by an industry-leading suite of software tools.
• Advanced protection and monitoring features including the use of RTDs for stator and bearing thermal protection and Analog Inputs for vibration monitoring
• Global acceptance as a member of the most renowned protection relay product family in the market.
• Draw-out construction allowing for minimized downtime and easy removal/installation of the 489 during maintenance routines
• Large, user-friendly front panel interface allowing for real-time power monitoring and setpoint access with a display that is easily readable in direct sunlight.
• Enhanced generator troubleshooting through the use of IRIGB time-synchronized event records, waveform capturing, and data loggers
• Simplified setpoint verification testing using built-in waveform simulation functionality
• Cost-effective access to information through industry-standard communication hardware (RS232, RS485, 10BaseT Ethernet) and protocols (Modbus RTU, Modbus TCP/IP, DNP 3.0)
• Available for use in most extreme harsh locations with the available Harsh Chemical Environment Option

• GL Certification for below-deck shipboard applications.

APPLICATIOnS
• Synchronous or induction generators operating at 25Hz, 50 Hz, or 60Hz
• Primary or backup protection in cogeneration applications
FEATURES
Protection and Control
•  Generator stator differential
• 100% stator ground
• Loss of excitation
• Distance backup
• Reverse power (anti-motoring)
• Overexcitation
• Ground directional overcurrent
• Inadvertent energization
• Breaker failure
• Stator and bearing thermal monitoring
• Stator and bearing vibration monitoring
• Negative sequence overcurrent
Communications
•Networking interfaces - RS232, RS485, 10Mbps copper Ethernet
•Multiple protocols - ModBus™ RTU, ModBus™ TCP/IP, DNP 3.0 Level 2 Monitoring and Metering
• Metering – current, voltage, power, Energy, frequency,  power factor
• Demand – current, watts, vars, VA
• Temperature – 12 RTD inputs
• Vibration and Speed – 4 analog transducer inputs
• Event Recorder – 256 time-tagged events
• Oscillography – 12 samples/ cycle up to 128 cycles in length
• Trending – 8 parameters with up to a 5-second sample rate
EnerVistaTM Software
• State-of-the-art software for configuration and commissioning  GE Multilin products
• Document and software archiving toolset to ensure reference  material and device utilities are up-to-date
• Ease-to-use real-time monitoring, control, and data archiving  software available
• EnerVistaTM Integrator provides easy integration of data in the 489 into new or existing monitoring and control systems.
Protection and Control
The 489 Generator Protection System provides comprehensive protection, metering, and monitoring of small to medium-sized synchronous or induction generators operating at 25, 50, or 60 Hz.  The 489 is ideally suited for primary or backup generator protection as well as for use in cogeneration applications.  Protection features found in the 489 include:
Generator Stator Differential
The 489 utilizes high-speed dual slope differential protection for detecting and clearing of stator phase faults.  Advanced CT saturation detection algorithms maintain immunity to saturation conditions that may be caused due to external disturbances through the use of a directional check that provides additional supervision and ensures the fault is internal to the generator before triggering it to trip.
100% Stator Ground
100% stator ground fault protection is provided through an overvoltage element and an adaptive voltage differential feature responding to the unbalance of the third harmonic at the machine terminals and at the neutral point.  The 489 compares the machine neutral voltage and ground current to determine if ground directional faults are within or outside the generator.
Backup Phase Distance
Two separate phase distance elements provide time-delayed backup protection for generator faults that have not otherwise been cleared by the primary system and generator protections.  The distance characteristic can compensate for a unit delta/wye power transformer that is located between the generator and the end of the zone of protection.  
Sensitive Directional Power
The 489 provides low forward power and reverse power elements to prevent generator motoring that can cause damage to the prime mover.  Independent settings for power pickup levels and operational delays are available for both alarming and tripping of each element.
Breaker Failure
The embedded breaker failure function in the 489 allows for improved system dependability without the additional cost of providing an independent breaker failure relay.  Upon detection of a breaker failure condition, the 489 can be configured to operate one of its 4 available digital outputs to signal upstream devices to quickly isolate the fault.
Loss of Excitation
Generator loss of excitation protection is provided through two negative offset mho characteristics as per IEEEC37.102 and has independent pickup delay setting for each characteristic.  The loss of excitation element will be blocked from tripping if a VT fuse fail condition is detected or if the Voltage Supervision characteristic is enabled and the voltage is measured to be above the user-defined level.
Stator Thermal Protection
The 489 provides thermal modeling overload protection to prevent generator damage caused by generator overheating.  The thermal model algorithms incorporate current unbalance biasing and RTD biasing, which provide accurate modeling of the actual generator temperature.  The 489 can be configured to trip the generator offline when the generator’s thermal limits are reached, or close an Alarm contact that signals operations personnel to take appropriate actions.
Abnormal Frequency Protection
Operation of generators at off-nominal frequencies can have extremely detrimental effects on both the generator itself and the associated prime mover, in particular with steam turbine generators operating
below normal frequency. The 489 provides overfrequency and underfrequency elements needed to protect generators from operation at off-nominal frequencies.  The 489 has alarm level settings to alert operations of abnormal frequency conditions as well as multiple trip levels that have independent tripping delay settings for each magnitude of abnormal frequency detected.
489 Generator Protection System
Communications
The 489 provides advanced communications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new or existing monitoring and control systems.  Multiple communication ports are available, including a front-panel RS232 serial port for easy local computer access, two RS485 serial ports, and a 10Mbps copper Ethernet port for direct integration into most communications architectures. The 489 supports the most popular industry standard protocols, enabling easy, direct integration into most DCS and SCADA systems.  Protocols supported include:
• Modbus RTU
• Modbus TCP/IP
• DNP 3.0 Level 2
User Interfaces
Keypad and Display
The 489 has a keypad and 40-character display for local monitoring and relay configuration without the need for a computer.  Up to 20 user-selected default messages can be displayed when the relay is protecting the generator.  In the event of a trip or an alarm, the display will automatically default to the proper message indicating the cause of the operation.
LED Indicators
The 489 front panel features 22 LED indicators that provide a quick indication of 489 status, generator status, and output relay status.
EnerVistaTM Software
The EnerVista™ Suite is an industry-leading set of software programs that simplify every aspect of using the 489 relay. The EnerVista™ suite provides all the tools to monitor the status of your protected asset, maintain the relay, and integrate information measured by the 489 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the 489 Setup software included with every relay to carry out post-mortem event analysis.
EnerVistaTM Launchpad
EnerVista™ Launchpad is a powerful software package that provides users with all of the setup and support tools needed for configuring and maintaining GE Multilin products. The setup software within
Launchpad allows configuring devices in real-time by communicating using serial,  Ethernet, or modem connections, or offline by creating setting files to be sent to devices at a later time.
Included in Launchpad is a document archiving and management system that ensures critical documentation is up-to-date and available when needed.
Documents made available include:
• Manuals
• Application Notes
• Guideform Specifications
• Brochures
• Wiring Diagrams
• FAQs
• Service Bulletins