CHAPTER 1: INTRODUCTION SPECIFICATIONS
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–23
FREQUENCY OOB ACCUMULATION
Frequency OOB Accumulation:....................7 sets; 5.00 to 70.00 Hz in steps of 0.01 Hz
Frequency OOB Accumulation Pickup:.....0 to 100000 s in steps of 1 s
Frequency OOB Accumulator Preset: .......0 to 100000 s in steps of 1 s
Level Accuracy (for 15 to 70 Hz Band
only):....................................................................±0.01 Hz
Volt Supervision:..................................................0.10 to 1.25 x VT in steps of 0.01 x VT
Timer Accuracy of Accumulation: ..............±1% or ±1 s, whichever is greater
HARMONIC DETECTION
Operating Parameter:.......................................Current 2
nd
, 3
rd
, 4
th
, 5
th
harmonic or THD per phase
Timer Accuracy: ..................................................Harmonics: ±3% of delay setting or ±1/4 cycle (whichever is
greater) from pickup to operate
THD: ±3% of delay setting or ±3 cycles (whichever is greater)
from pickup to operate
POWER FACTOR (55)
Switch-In Level:....................................................0.01 Lead to 1 to 0.01 Lag in steps of 0.01
Dropout Level: ......................................................0.01 Lead to 1 to 0.01 Lag in steps of 0.01
Delay: .......................................................................0.000 to 6000.000 s in steps of 0.001 s
Minimum Operating Voltage: ........................0.00 to 1.25 x VT in steps of 0.01 x VT
Level Accuracy:....................................................± 0.02
Timer Accuracy: ..................................................± 3% of delay setting or ± 1¼ cycle (whichever is greater)
from pickup to operate
FAST PATH:
For 2 IO_A module configuration the following ratings are applied to meet UL508
requirements: 1 second “on”/ 10 seconds “off” per output relay at max rating.
PULSED OUTPUTS
Mode:........................................................................3-phase positive and negative active energy measurement,
3-phase positive and negative reactive energy
measurements
Principle:..................................................................Pulsed output is energized for one second and then de-
energized for one second after the programed energy
increment.
SPEED PROTECTION
Configuration:.......................................................Assign to any contact input
Operating Range:................................................50 to 120% of Rated RPM
Minimum Pulse Width:......................................>8% of a revolution
Level Accuracy:....................................................±1% of rated speed
Timer Accuracy: ..................................................±3% of delay setting or ±2 power cycles (whichever is
greater) from pickup to operate
Element:...................................................................Trip and Alarm
THERMAL OVERLOAD PROTECTION
Thermal Overload Curves:..............................IEC hot and cold curves, FlexCurves
FlexCurve Time Multiplier: ..............................0.00 to 600.00 in steps of 0.01
Operate Time Constant: ..................................0 to 1000 min in steps of 0.1 min
Overload (k) Factor:............................................1.00 to 1.50 in steps of 0.01
Reset Time Constant:........................................0.0 to 1000.0 min in steps of 0.1 min
Minimum Reset Time: .......................................0.0 to 1000.0 min in steps of 0.1 min
Timer Accuracy (hot curve):...........................±100 ms or ±2%, whichever is greater
Timer Accuracy (cold curve):.........................±500 ms or ±2%, whichever is greater
TRIP CIRCUIT MONITOR (TCM)
Applicable Voltage: ............................................20 to 250 VDC
Trickle Current:.....................................................1 to 2.5 mA
Timing Accuracy:................................................± 3 % or ± 4 ms, whichever is greater
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