GE MI-869 Instruction Manual page 25

CHAPTER 1: INTRODUCTION
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869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
NEGATIVE SEQUENCE OVERVOLTAGE (59_2)
Operating Parameter:.......................................V_2
Pickup Level:..........................................................0.00 to 3.00 x VT in steps of 0.01 x VT
Dropout Level: ......................................................97 to 98% of Pickup
Level Accuracy:....................................................± 0.5% of reading from 10 to 208 V
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
Operate Time:.......................................................< 25 ms at 1.1 x pickup at 60 Hz
Timer Accuracy:................................................... ± 3% of delay setting or ± ¼ cycle (whichever is greater)
VOLTS PER HERTZ (24)
Voltages: .................................................................Phasor only
Pickup Level:..........................................................0.80 to 4.00 in steps of 0.01 pu
Dropout Level: ......................................................97 to 98% of pickup
Level Accuracy:....................................................±0.02 pu
Timing Curves: .....................................................Definite Time; IEC Inverse A/B/C; FlexCurves A, B, C, and D
TD Multiplier: .........................................................0.05 to 600.00 s in steps of 0.01
Reset Delay:...........................................................0.00 to 6000.000 s in steps of 0.01
Timer Accuracy:...................................................±3% of operate time or ±15 cycles (whichever is greater) for
Number of Elements: ........................................1
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
Timer Accuracy:...................................................± 3% of delay setting or ± ¼ cycle (whichever is greater) from
Positive/Negative var Trip/Alarm Pickup
Level:....................................................................1 to 25000 kvar in steps of 1 kvar
UNDERFREQUENCY (81U)
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 0.001s
Dropout Time Delay: .........................................0.000 to 6000.000 s in steps of 0.001s
Minimum Operating Voltage: ........................0.000 to 1.250 x VT in steps of 0.001 x VT
Minimum Operating Current: ........................0.000 to 30.000 x CT in steps of 0.001 x CT
Level Accuracy:....................................................± 0.001 Hz
Timer Accuracy:...................................................± 3% of delay setting or ± ¼ cycle (whichever is greater) from
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.
< 30 ms at 1.1 x pickup at 50 Hz
from pickup to operate
values greater than 1.1 x pickup
< 65 ms at 1.1 x pickup at 50 Hz (NOTE 1)
pickup to operate
pickup to operate
typically 7 cycles at 0.3 Hz/s change
typically 6.5 cycles at 0.5 Hz/s change
SPECIFICATIONS
1–15