SR489
Generator Management Relay
Economical protection, metering, and monitoring functions for small
and medium sized generators.
Presented by:
John Levine, P.E.
Levine Lectronics and Lectric, Inc.
John@L-3.com
770 565-1556
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Outline
Overview
Theory
Hardware
Wiring
Software
Testing
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Overview
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SR489 Generator Management Relay
Product Overview
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Suitable for protecting Induction
and Synchronous Generator
Generator Protection Features
Drawout Case Installation
Hardware
Communications
EnerVista Software
Fault Diagnostics
Metering
Testing and Commissioning
Ordering
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SR489 Generator Management Relay
Product Overview
• Ideal Protection for Induction and
Synchronous Generators at 25, 50 and
60Hz
• Complete Generator Protection including:
• Generator Stator Differential
• 2 Zone Distance Backup
• 100% Stator Ground
• High speed sampling, 12 samples per
cycle
• Drawout Case Installation
• Powerful Fault Recording: Waveform,
Sequence of Events
• Ethernet and Serial Communications
• EnerVista Suite of Software supported
• Metering of all important parameters
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Theory
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Show Generator Theory General Overview and
Typical System from Training CD
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Generator Protection
System
Ground
Stator
Ground
Exciter
G
The
"Wild"
Power
System
Stator
Phase
System
Phase
• Internal and External Short Circuits
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Generator Protection Review
– Abnormal Operating Conditions
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Loss of Synchronism
Abnormal Frequency
Overexcitation
Field Loss
Inadvertent Energizing
Breaker Failure
Loss of Prime Mover Power
Blown VT Fuses
Open Circuits
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Generator Protection
Over
Power
Overexcitation
Loss of Field
Open
Circuits
Loss of Field
Overexcitation
Overexcitation
The
"Wild"
Power
System
Exciter
G
Abnormal
Frequency
Reverse
Power
Inadvertent
Energizing,
Pole Flashover
Breaker
Failure
Abnormal
Frequency
Loss of
Synchronism
• Abnormal Operating Conditions
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Small Machine Protection
IEEE Buff Book
32 Reverse Power
40 Loss of Excitation
51V voltage restraint
51G Ground overcurrent
87 Differential
• Small – up to 1 MW to 600V, 500 kVA if >600V
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Small Machine Protection
IEEE Buff Book
32 Reverse Power
40 Loss of Excitation
46 Negative Sequence
51V voltage restraint
51G Ground overcurrent
87 Differential
• Medium – up to 12.5 MW
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Small Machine Protection
IEEE Buff Book
32 Reverse Power
40 Loss of Excitation
46 Negative Sequence
49 Thermal Overload
51V voltage restraint
51G Ground overcurrent
64 Ground Relay
87 Differential
• Large – up to 50 MW
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Large Machine Protection
IEEE C37.102
• Unit Connected,
• High Z
Grounded
32 Reverse Power
40 Loss of Excitation
46 Negative Sequence
49 Thermal Overload
51V voltage restraint
51G Ground overcurrent
64 Ground Relay
87 Differential
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SR489 Protection Functions
Protection Functions Include:
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Generator Stator Differential
Backup Distance Protection
100% Stator Ground
Generator Unbalance
Loss of Excitation
Accidental Energization
Breaker Fail
Phase Overcurrent – Voltage Restraint
Neutral Inst. / Timed Overcurrent
Neg. Sequence Overcurrent
Under / Over Voltage
Under / Over Frequency
Generator Thermal Model
RTD Temperature
Overexcitation – Volts/Hertz
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Desirable Attributes - Generator
– Reverse Power (32)
• Should be sensitive to 0.05 pu to properly detect motoring in large steam turbines
– Existing E/M and Static relays not sensitive enough
– May cause shutdown difficulties
– Negative Sequence (46)
• Should be sensitive to low values to detect open poles/conductors on system after GSU
– Existing E/M and Static relays not sensitive enough
• Long time low level events may cause excessive rotor heating, thermal tripping and
damage rotor
– 100% Stator Ground (59N / 59D)
• Protects all of the stator winding
– Existing schemes typically only see 90%
– Stop low level fault near neutral from degrading into a high level fault and causing large
amounts of damage
– Very secure
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Desirable Attributes - Generator
• Inadvertent Energizing (50/27)
– High speed tripping of unit after breaker accidentally closed on dead
machine, also pole flashover prior to syncing
• Most existing schemes do not incorporate
– Many schemes fail due to complexity (reliance on breaker auxiliary
switches, yard distance relays, etc.
– If breaker is not tripped rapidly, mechanical and electric damage can
occur to machine in fractions of a second!
– Pole flashovers must be cleared by high speed breaker failure, as the
breaker is open!
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Line – Ground faults – Delta Connected Generator
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Line – Ground faults – Wye Connected Generator
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SR489 Protection Functions
Generator Stator Differential
• Stator Phase Differential
• Dual Slope Percent Restraint Operating
Characteristic
• Directional Supervision under saturation
conditions
Distance Backup Protection
• 2 Zone Mho Distance Protection
Dual Slope Phase Differential
• Backup for primary line protection
• Configurable Reach and Angle Distance
Characteristic
100% Stator Ground Protection
• 95% Fundamental OverVoltage
• 15% Third Harmonic UnderVoltage
Two Zone Distance Backup
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SR489 Protection Functions
Voltage Protection
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Phase Overvoltage
Phase Undervoltage
Neutral Overvoltage (fundamental)
Neutral Undervoltage (3rd Harmonic)
Voltage Phase Reversal
Current Protection
Voltage Restraint Overcurrent
• Phase, Ground and Negative Sequence
Overcurrent Tripping
• IEC, ANSI , IAC and Customizable
Overcurrent Curves
• Voltage Restraint increasing sensitivity under
low voltage conditions
Frequency Protection
• Overfrequency
• Underfrequency
Undervoltage Trip Curves
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SR489 Protection Functions
Thermal Protection
• Generator Thermal Model
• RTD Alarming and Tripping
• RTD Biased Thermal Model
Inadvertent Energization (show Training CD)
• Prevents Accidentally Closing a Stopped
Generator onto a Live Line
• Armed when Generator is Offline and Voltage is
below a pre-set level
Thermal Model – Voltage
Dependant
Overload Curves
Loss of Excitation (show Training CD)
• Uses Impedance Circle for loss of excitation
detection
• 2 Zones for fault detection and control
Volt/Hertz (Overexcitation)
• Detects changes in the Volts/Hertz ratio of the
generator or associated transformer
Loss of Excitation
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Hardware
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SR489 Generator Management Relay
Ordering
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489 Generator Management Relay
P1
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1 Amp Phase CT Secondary Inputs
P5
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5 Amp Phase CT Secondary Inputs
LO
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20-60VCD, 20-48VAC Control Power
HI
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80-300VDC, 70-265VAC Control Power
A1
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0-1 mA Analog Outputs
A20
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4-20 mA Analog Outputs
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Basic Display
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Enhanced Display – Larger LCD
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Enhanced Display with Ethernet (10-Base-T)
H
Harsh (chemical) environmental conformal
coating
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SR489 Physical Access Points
Hardware Connections
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6 Form-C Output Relays
• 10ms Operate Time
• Make and Carry 30A for 0.2 sec.
• Carry 10A Continuous
9 Contact Inputs
• Opto-isolated Dry Contacts
12 RTD Inputs
• 100 Ω Platinum
• 100 Ω Nickel
• 120 Ω Nickel
• 10 Ω Copper
4 programmable analog outputs
• 4-20 or 0-1 mA (as ordered)
• 29 programmable parameters
Pulse Output
• Configurable Pulse Output based on
+ kwh, +kvarh, –kvarh
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SR489 Physical Interface
• Minimize replacement
time
• Security Audit Trail
• Revision control/history
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Protection, metering, control
Event recorder
Data logger
Waveform analysis
• Large LCD Display
• Self description
• Alarm indication
• Asset status
• System Status
• RS232 serial port
• Dedicated control keys
• Full numerical keypad
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LEDs
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Wiring
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Software
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Example
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SR489 EnerVista Software
EnerVista Launchpad – Easy to use Device Setup and
Document Management Toolset
• Comprehensive data for fault
& system analysis
• Complete archive of up-to-date
documents & software
• Single application for configuring
all devices
• Automatic email notification on
new updates
• Scheduled downloads of all new
document & software releases
”The most powerful relay management tool”
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SR489 EnerVista Launchpad
Settings configuration
• Intuitive protection settings
• Document library & update
Metering
• Local HMI
• Status of all inputs and outputs
• Real-time monitoring of phasors
Troubleshooting
• Search and sorts of event records
• COMTRADE waveform viewer
• Real time data logging
Role Based Security
• Restricted access to relay
Simply the most powerful way to manage your SR489
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SR489 EnerVista Setup Program
EnerVista SR489 Setup Program
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Plug-And-Play communications
Setpoint Configuration
Metering Values
Record Retrieval
Oscillography Viewing
Event Recorder Viewing
Setting File Management
Printing Setting Files
Simulation mode for testing/training
SR489 Firmware Upgrading
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SR489 EnerVista Viewpoint
Premium Monitoring, Engineering,
& Maintenance Toolsets
Viewpoint Monitoring
• Monitoring, control, trending, alarming
& fault data recording
Viewpoint Engineer
• Programming, testing & commissioning
Viewpoint Maintenance
• Status & security reports, fault
diagnostics & fault data collection
Simplifying every aspect of customer interaction
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SR489 Viewpoint Monitoring
Viewpoint Monitoring
Remotely monitor the relay
in real-time
. . . Easy to use, one tool for:
• Plug & play screens for instant
monitoring
• Single-line monitoring
• Annunciator alarming
• Trending
• Automatic fault data collection
Simplifying every aspect of customer interaction
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SR489 Viewpoint Maintenance
Viewpoint Maintenance
Device Health and Security
Reporting
• Single click retrieval of fault data
• Setting security report showing
history of setting changes
• Health report showing status of
protective device
Simplifying every aspect of customer interaction
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SR489 Generator Maintenance & Diagnostics
Generator Statistical Data
• Total Generator Running Hours
• Number of Generator Trips
• Number of Breaker Operations
Generator Fault Recording
• Last Trip & Pre-Trip data Report
• Sequence of Event Report – 256 Events
• Waveform Fault Capture
• Automatic Triggering
• Up to 128 Cycles in length
• Up to 16 separate Fault Incidents
• Records 16 Analog data channels
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SR489 Generator Monitoring
Metering & Monitoring
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Voltage (Phase to Phase & Phase to Line)
Phase and Ground Current
Differential Current
Negative Sequence Current
Frequency
% Generator Load
% Generator Current Unbalance
Power (MW, Mvar, MVA)
Energy (MWh, Mvarh)
Power Factor
Demand
RTD Temperature
Speed (Tachometer)
Breaker Status
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SR489 Enhanced Security
Prevents Unauthorized Access and Provide Traceability
Security Audit Trail
• Date and time of hardware,
firmware or setting changes to
your relays
• Logging of the MAC address of
computers and users making
settings changes
• Track method of how settings
changes were made (i.e. keypad,
serial port, ethernet)
• Date/time
security report
was generated
• Description of
the GE Multilin
Relay
• Summary of the
last time the
configuration
was changed
• History of last 10
occurrences the
configuration
was changed
Security strategy – conforms to industry and regulated guidelines
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Demo the software
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Connecting to relay
Uploading settings
Downloading settings
File compare
Settings
• Active verses setting group
– Digital input > predefined > dual setpoints
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Testing
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SR489 Simplified Testing
Simulation Mode
• Allows testing without external test
equipment
• Simulates all Current and Voltage
injection
• Simulate Pre-fault conditions
• Simulate Fault Conditions
• Verify protection element operation
• Analyze simulated waveforms and relay
actions
• Test output relays
• Test analog inputs
Ideal for verifying configuration….and for training employees
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Questions?
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