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
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