2-36
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
2
Limit angle:
40 to 90° in steps of 1, independent for forward and reverse
Angle accuracy:
±2°
Offset impedance:
0.00 to 250.00
Ω
in steps of 0.01
Pickup level:
0.015 to 30.000 pu in steps of 0.01
Dropout level:
97 to 98%
Operation time:
<16 ms at 3
×
pickup at 60 Hz
WATTMETRIC ZERO-SEQUENCE DIRECTIONAL
Measured power:
zero-sequence
Number of elements:
2
Characteristic angle:
0 to 360° in steps of 1
Minimum power:
0.001 to 1.200 pu in steps of 0.001
Pickup level accuracy:
±1% or ±0.0025 pu, whichever is greater
Hysteresis:
3% or 0.001 pu, whichever is greater
Pickup delay:
definite time (0 to 600.00 s in steps of 0.01), inverse time, or FlexCurve
Inverse time multiplier:
0.01 to 2.00 s in steps of 0.01
Curve timing accuracy:
±3.5% of operate time or ±1 cycle (whichever is greater) from pickup to operate
Operate time:
<30 ms at 60 Hz
SENSITIVE DIRECTIONAL POWER
Measured power:
3-phase, true RMS
Number of stages:
2
Characteristic angle:
0 to 359° in steps of 1
Calibration angle:
0.00 to 0.95° in steps of 0.05
Minimum power:
–1.200 to 1.200 pu in steps of 0.001
Pickup level accuracy:
±1% or ±0.001 pu, whichever is greater
Hysteresis:
2% or 0.001 pu, whichever is greater
Pickup delay:
0 to 600.00 s in steps of 0.01
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
Operate time:
<50 ms
PHASE UNDERVOLTAGE
Voltage:
Phasor only
Pickup level:
0.004 to 3.000 pu in steps of 0.001
Dropout level:
102 to 103% of pickup
Level accuracy:
±0.5% of reading from 10 to 208 V
Curve shapes:
GE IAV Inverse;
Definite Time (0.1s base curve)
Curve multiplier:
Time dial = 0.00 to 600.00 in steps of 0.01
Curve timing accuracy at <0.90 x pickup:
±3.5% of operate time or ±1/2 cycle (whichever is greater) from pickup to operate
Operate time:
<30 ms at 0.9 pickup at 60 Hz for Definite Time mode
AUXILIARY UNDERVOLTAGE
Pickup level:
0.004 to 3.000 pu in steps of 0.001
Dropout level:
102 to 103% of pickup
Level accuracy:
±0.5% of reading from 10 to 208 V
Curve shapes:
GE IAV Inverse, Definite Time
Curve multiplier:
Time Dial = 0 to 600.00 in steps of 0.01
Curve timing accuracy at <0.90 x pickup:
±3.5% of operate time or ±1/2 cycle (whichever is greater) from pickup to operate
Operate time:
<30 ms at 0.9 pickup at 60 Hz for Definite Time mode
PHASE OVERVOLTAGE
Voltage:
Phasor only
Pickup level:
0.004 to 3.000 pu in steps of 0.001
Dropout level:
97 to 98% of pickup
Level accuracy:
±0.5% of reading from 10 to 208 V
