Control - GE 889 Instruction Manual

SPECIFICATIONS
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Control

1–20
OVERFREQUENCY (81O)
Pickup Level: ......................................................... 20.00 to 65.00 Hz in steps of 0.01
Dropout Level:...................................................... Pickup - 0.03 Hz
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Dropout Time Delay:......................................... 0.000 to 6000.000 s in steps of 0.001 s
Minimum Operating Voltage:........................ 0.000 to 1.250 x VT in steps of 0.001 x VT
Level Accuracy: ................................................... ± 0.001 Hz
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
Operate Time: ...................................................... typically 7.5 cycles at 0.1 Hz/s change
Typical times are average Operate Times including variables such as frequency change
instance, test method, etc., and may vary by ± 0.5 cycles.
FREQUENCY RATE OF CHANGE (81R)
df/dt Trend:............................................................ Increasing, Decreasing, Bi-directional
df/dt Pickup Level:.............................................. 0.10 to 15.00 Hz/s in steps of 0.01 Hz/s
df/dt Dropout Level: .......................................... 96% of Pickup Level
df/dt Level Accuracy:........................................ 80 mHz/s or 3.5%, whichever is greater
Minimum Frequency:........................................ 20.00 to 80.00 Hz in steps of 0.01 Hz
Maximum Frequency: ...................................... 20.00 to 80.00 Hz in steps of 0.01 Hz
Minimum Voltage Threshold: ........................ 0.000 to 1.250 x VT in steps of 0.001 x VT
Minimum Current Threshold: ........................ 0.000 to 30.000 x CT in steps of 0.001 x CT
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
95% Settling Time for df/dt: .......................... < 24 cycles
Operate Time: ...................................................... typically 10 cycles at 2 × Pickup
RTD PROTECTION
Pickup:...................................................................... 1°C to 250°C in steps of 1°C
Hysteresis: ............................................................. 2°C
Timer Accuracy:.................................................. <2 s
Elements: ................................................................ Trip and Alarm
FLEXELEMENTS
Number of elements: ........................................ 8
Operating signal: ................................................ Any analog actual value, or two values in a differential mode
Operating signal mode: ................................... Signed, or Absolute value
Operating mode:................................................. Level, Delta
Comparison direction:...................................... Over, Under
Pickup Level: ......................................................... -30.000 to 30.000 pu in steps of 0.001 pu
Hysteresis: ............................................................. 0.1 to 50.0% in steps of 0.1%
Delta dt:................................................................... 40 msec to 45 days
Pickup and dropout delays:........................... 0.000 to 6000.000 s in steps of 0.001 s
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
from pickup to operate
typically 7 cycles at 0.3 Hz/s change
typically 6.5 cycles at 0.5 Hz/s change
from pickup to operate
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION