GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 69)

Power Management Control System
Appendix A – IED Descriptions
59
Protection and Control
• Thermal model biased with RTD feedback and
negative sequence current
• Voltage-compensated acceleration
• Undervoltage, overvoltage
• Phase-differential protection
• Underpower for load loss
• Out-of-step for synchronous motors
• Dual overload curves for two-speed motors
• Reduced-voltage starting control
• Trip coil supervision for breakers
Inputs and Outputs
• 12 RTDs, programmable
• Five pre-defined and four assignable digital
inputs
• Four analog inputs
• Six output relays
• Four programmable analog outputs
Metering and Monitoring
• A, V, W, var, VA, PF, Hz, Wh, varh demand
• Event recorder – last 40
• Waveform capture – 16 cycles
User Interface
• 22 front-panel LED indicators
• 40-character display
• Control keys and numeric keypad
• RS-232 and two RS-485 ports
SR489 Generator Management Relay
The SR489 Generator Management Relay provides
economical protection, metering, and monitoring
functions. It can be used as primary or backup
protection on synchronous or induction generators of
25, 50, or 60 Hz. It may be applied in primary, backup
and cogenerator applications.
The SR489 offers comprehensive generator protection
features. These features include phase differential,
100% stator ground, ground-overcurrent, negative-
sequence overcurrent, voltage-restrained phase-
overcurrents, over- and undervoltage, over- and
underfrequency and reverse power. To accommodate
synchronous generators, the protection features include
overexcitation, loss of field, and inadvertent generator
energization.
Monitoring functions include RMS current, negative-
sequence current, voltage, three-phase power, and
temperature via 12 RTD inputs.
Voltage terminal fuse and breaker operation are
monitored and failures reported.
Four analog inputs may be used for monitoring
vibration or control transducers. The four analog
output channels can be configured to reflect any
measured parameter, and may be used to eliminate
costly transducers. Digital inputs may be used to route
signals through the SR489 for protection, control, or
diagnostic functions.
The user interface includes a 40-character display and a
keypad. Twenty-two LED indicators on the front-panel
indicate status of the SR489, the generator, and the
output relays. A front-panel RS-232 port allows easy local
computer access. Two rear-panel RS-485 ports provide
remote access. Data communication rates range from
300 to 19,200 baud. All data can be transmitted
simultaneously through the three communications
ports to PMCS software.
Application
• Synchronous or induction generators
• Primary, backup, and cogenerator
Protection and Control
• Phase differential
• 100% stator ground
• Ground overcurrent
• Anti-motoring (reverse power)
• Loss of field
• Negative-sequence overcurrent
• Instantaneous overcurrent (startup)
• Voltage-restrained phase-overcurrent
• Overexcitation, Volts/Hz
• Undervoltage and overvoltage
• Voltage phase reversal
• Underfrequency and overfrequency
• Stator overtemperature
• Bearing overtemperature, vibration
• Inadvertent generator energization
• Sequential-tripping logic
• Breaker-failure detection
• Overspeed
• VT fuse-failure detection
• Trip coil supervision
• Four analog outputs, four analog inputs
• Seven digital inputs, 12 RTD inputs
Metering and Monitoring
• Metering: A, V, W, var, VA, Wh, varh, PF, Hz
• Demand values: A W var VA
• Event record: last 40 events
• Waveform capture: 16 cycles