GE D90 Plus Instruction Manual page 32

SPECIFICATIONS
22
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)
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION