GE D90 Plus Instruction Manual page 37

CHAPTER 2: PRODUCT DESCRIPTION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
GROUND INSTANTANEOUS OVERCURRENT
Pickup level: ...........................................................0.000 to 30.000 pu in steps of 0.001
Dropout level:........................................................<98% of pickup
Level accuracy at 0.1 to 2.0 × CT:................±0.5% of reading or ±1% of rated (whichever is greater)
Level accuracy at >2.0 × CT:..........................±1.5% of reading
Overreach:..............................................................<2%
Pickup delay: .........................................................0.00 to 600.00 seconds in steps of 0.01
Reset delay: ...........................................................0.00 to 600.00 seconds in steps of 0.01
Operate time:........................................................<16 ms at 3 × pickup at 60 Hz
Timing accuracy for operation at 1.5 ×
pickup: ................................................................±3% or ±4 ms (whichever is greater)
GROUND TIME OVERCURRENT
Current:....................................................................phasor or RMS
Pickup level: ...........................................................0.000 to 30.000 pu in steps of 0.001
Dropout level:........................................................<98% of pickup
Level accuracy at 0.1 to 2.0 × CT:................±0.5% of reading or ±1% of rated (whichever is greater)
Level accuracy at >2.0 × CT:..........................±1.5% of reading
Curve shapes:.......................................................IEEE Moderately Inverse, IEEE Very Inverse, IEEE Extremely
Curve multiplier: ..................................................0.01 to 600.00 in steps of 0.01
Reset type:..............................................................instantaneous/timed (per IEEE)
Timing accuracy for 1.03 to 20 × pickup: ±3.5% of operating time or ±1 cycle (whichever is greater)
LINE PICKUP
Phase instantaneous overcurrent: .............0.000 to 30.000 pu in steps of 0.001
Undervoltage pickup:........................................0.000 to 3.000 pu in steps of 0.001
Overvoltage delay: .............................................0.000 to 65.535 seconds in steps of 0.001
LOAD ENCROACHMENT
Responds to:..........................................................positive-sequence quantities
Minimum voltage:...............................................0.000 to 3.000 pu in steps of 0.001
Reach:.......................................................................0.02 to 250.00 ohms in steps of 0.01 (secondary ohms)
Impedance accuracy:.......................................±5%
Angle:........................................................................5 to 50° in steps of 1
Angle accuracy:...................................................±2°
Pickup delay: .........................................................0.000 to 65.535 seconds in steps of 0.001
Reset delay: ...........................................................0.000 to 65.535 seconds in steps of 0.001
Timing accuracy: ................................................±3% or ±4 ms (whichever is greater)
Operate time:........................................................<30 ms at 60 Hz
Inverse, IEC (BS) A, IEC (BS) B, IEC (BS) C, IEC Short Inverse, IAC
Inverse, IAC Short Inverse, IAC Very Inverse, IAC Extremely
2
Inverse, I t, FlexCurves™ (programmable), definite time (0.01
second base curve)
SPECIFICATIONS
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