GE L90 Instruction Manual page 51

CHAPTER 2: PRODUCT DESCRIPTION
Pickup delay:
Operate time:
Timer accuracy:
COMPENSATED OVERVOLTAGE
Elements:
Stages:
Pickup threshold:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Timer accuracy:
Operate time:
NEUTRAL OVERVOLTAGE
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Reset delay:
Curve timing accuracy at >1.1 pickup: ±3.5% of operate time or ±1 cycle (whichever is greater) from pickup to operate
Operate time:
AUXILIARY OVERVOLTAGE
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Reset delay:
Timer accuracy:
Operate time:
VOLTS PER HERTZ
Voltage:
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Timing curves:
TD Multiplier:
Reset delay:
Timer accuracy:
UNDERFREQUENCY
Minimum signal:
Pickup level:
Dropout level:
Level accuracy:
Time delay:
Timer accuracy:
Operate time:
Typical times are average operate times including variables such as frequency change instance, test method, and so on, and can vary by
±0.5 cycles.
OVERFREQUENCY
Pickup level:
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
0.00 to 600.00 in steps of 0.01 s
<30 ms at 1.10 × pickup at 60 Hz
±3% of operate time or ±1/4 cycle (whichever is greater)
1
3
0.250 to 3.000 pu in steps of 0.001
±0.5% of reading from 10 to 208 V
97 to 98% of pickup
0.00 to 600.00 s in steps of 0.01
±3% of operate time or ±20 ms (whichever is greater)
<2 cycles at 1.10 × pickup
0.004 to 3.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from 10 to 208 V
0.00 to 600.00 s in steps of 0.01 (definite time) or user-defined curve
0.00 to 600.00 s in steps of 0.01
<30 ms at 1.10 pickup at 60 Hz
0.004 to 3.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from 10 to 208 V
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
±3% of operate time or ±1/4 cycle (whichever is greater)
<30 ms at 1.10 × pickup at 60 Hz
Phasor only
0.80 to 4.00 in steps of 0.01 pu V/Hz
97 to 98% of pickup
±0.02 pu
0 to 600.00 s in steps of 0.01
Definite Time; Inverse A, B, and C, FlexCurves™ A, B, C, and D
0.05 to 600.00 s in steps of 0.01
0.0 to 1000.0 s in steps of 0.1
±3% of operate time or ±3 cycles (whichever is greater) for values greater than 1.1 × pickup
0.10 to 1.25 pu in steps of 0.01
20.00 to 65.00 Hz in steps of 0.01
pickup + 0.03 Hz
±0.001 Hz
0 to 65.535 s in steps of 0.001
±3% of operate time or ±1/4 cycle (whichever is greater)
typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
20.00 to 65.00 Hz in steps of 0.01
SPECIFICATIONS
2
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