GE 889 - Page 38

1–28 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
AC VOLTAGE
VT Range: ...............................................................10 to 260 V
Nominal Frequency:.......................................... 20 to 65 Hz
Burden:....................................................................<0.25 VA at 120 V
Conversion Range:.............................................1 to 275 V
Voltage Withstand:.............................................continuous at 260 V to neutral
1 min/hr at 420 V to neutral
ANALOG INPUTS
Current Input (mA DC):......................................0 to 1mA, 0 to 5mA, 0 to 10mA, 0 to 20mA, 4 to 20mA
(configurable)
Input Impedance: ...............................................375  ± 10%
Conversion range:.............................................. 0 to +21 mA DC
Accuracy: ...............................................................± 1% of full scale,
Type:.........................................................................Passive
Analog Input Supply:.........................................+24 V DC at 100 mA max.
Sampling Interval:..............................................Typically 500 ms
FREQUENCY
Nominal frequency setting:...........................25 Hz, 50 Hz, 60 Hz
Sampling frequency:.........................................64 samples per power cycle
128 samples per power cycle (available for transient
recorder
Tracking frequency range:.............................2 to 72 Hz
ARC FLASH SENSOR/FIBER
Number of Point Sensors:...............................4
Detection Radius: ...............................................180 degree
Maximum Fiber Length (Point Sensor):.....18 ft
Fiber Size: ...............................................................1000 um
Mode:........................................................................ Multi-mode
Connector: .............................................................Small Media Interface (SMI)
Fiber Type: ............................................................. Plastic Optical Fiber
Bend Radius:.........................................................>25 mm
CONTACT INPUTS
Number of Inputs: ..............................................Based on relay ordering
Type:.........................................................................Wet or Dry
Wet Contacts:....................................................... 300 V DC maximum
Selectable thresholds: ......................................17, 33, 84, 166 VDC
Tolerance:...............................................................±20%
Recognition time:................................................1 ms (typical)
Debounce time: ...................................................0.0 to 16.0 ms in steps of 0.5 ms
Continuous current draw (burden):............ 2 mA
CLOCK
Setup: .......................................................................Date and Time, Daylight Saving Time, UTC (Coordinated
Universal Time)
Backup Retention: ..............................................1 hour
IRIG-B INPUT
Auto-detect:..........................................................DC and AM
Amplitude Modulation:.....................................1 V to 10 V pk-to-pk
DC Shift:...................................................................TTL
Input Impedance: ...............................................40 k
Isolation: .................................................................2 kV