GE 889 - Specifications

1–12 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
Specifications
To obtain the total operating time, i.e. from the presence of a trip condition to initiation of a
trip, add 8 ms output relay time to the operate times listed below.
NOTE
NOTE:
If the Operate time and/or Timer Accuracy (in ms) for 25 Hz is not specified, then it is 2
times longer than the time specified for 50 Hz or 2.4 times longer if specified for 60 Hz only.
Device
ANNUNCIATOR PANEL
Number of Elements: ........................................1 (36 indicators)
Layout:.....................................................................Grid of 2x2 or 3x3
Data Storage:........................................................Non-volatile memory
Mode:........................................................................Self-reset, latched, acknowledgeable
Display Text:..........................................................3 lines of 15 characters maximum
Visual Indication: ................................................Flashing: 2Hz @ 50% duty cycle
CUSTOM CONFIGURATIONS
Config Mode: ........................................................Simplified, Regular
Protection
ARC FLASH HS PHASE/GROUND INSTANTANEOUS OVERCURRENT HS 50P/50G
Current:.................................................................... Phasor Magnitude (special high speed algorithm)
Pickup Level: .........................................................0.050 to 30.000 x CT in steps of 0.001 x CT
Dropout Level:......................................................97 to 98% of Pickup
Level Accuracy: ...................................................For 0.1 to 0.2 x CT: ± 0.2% of reading or 1.5% of rated,
whichever is greater
For > 0.2 x CT: ± 1.5% of reading
Operate Time: ......................................................4 ms at >6 x Pickup at 60 Hz
5 ms at >6 x Pickup at 50 Hz
4-8 ms at > (3-6) x Pickup at 60 Hz
4-10 ms at > (3-6) x Pickup at 50 Hz
DIRECTIONAL POWER (32)
Measured Power:................................................3-phase
Number of Stages: .............................................2
Characteristic Angle:.........................................0º to 359º in steps of 1°
Calibration Angle: ...............................................0.00º to 0.95º in steps of 0.05°
Power Pickup Range: ........................................ –1.200 to 1.200 x Rated Power in steps of 0.001
Pickup Level Accuracy:....................................± 1% or ± 0.001 x Rated Power, whichever is greater
Hysteresis: .............................................................2% or 0.001 x Rated Power, whichever is greater
Pickup Time Delay: ............................................0.000 to 6000.000 s in steps of 0.001 s
Operate Time: ......................................................< 55 ms at 1.1 x pickup at 60 Hz
< 65 ms at 1.1 x pickup at 50 Hz
Timer Accuracy:..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
PERCENT DIFFERENTIAL (87G)
Pickup Level: .........................................................0.05 to 1.00 x CT in steps of 0.01
Dropout Level:......................................................97 to 98% of Pickup
Slope 1 and 2:.......................................................1 to 100% in steps of 1
Break 1:....................................................................0.50 to 2.00 x CT in steps of 0.01
Break 2:....................................................................2.00 to 30.00 x CT in steps of 0.01
Operate Time: ......................................................<16 ms at >3 × Pickup at 60 Hz;
<20 ms at >3 × Pickup at 50 Hz