32
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality:........................................................co-existing forward and reverse
Polarizing:...............................................................voltage, current, dual
Polarizing voltage:..............................................V_0 or VX
Polarizing current: ..............................................IG
Operating current:..............................................I_0
Level sensing: .......................................................3 × (|I_0| –
K
× |I_1|), IG; independent for forward and reverse
Restraint (
K
): ..........................................................0.000 to 0.500 in steps of 0.001
Characteristic angle:.........................................–90 to 90° in steps of 1
Limit angle: ............................................................40 to 90° in steps of 1, independent for forward and reverse
Angle accuracy:...................................................±2°
Offset impedance:..............................................0.00 to 250.00 ohms in steps of 0.01
Pickup level:...........................................................0.002 to 30.000 pu in steps of 0.01
Dropout level: .......................................................<98%
Operation time:....................................................<16 ms at 3 × pickup at 60 Hz
NEUTRAL 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:........................................................<20 ms at 3 × pickup at 60 Hz
Timing accuracy for operation at 1.5 ×
pickup: ................................................................±3% or ±4 ms (whichever is greater)
NEUTRAL OVERVOLTAGE
Pickup level:...........................................................0.000 to 1.250 pu in steps of 0.001
Dropout level: .......................................................<98% of pickup
Level accuracy:....................................................±0.5% of reading from 10 to 208 V
Pickup delay:.........................................................0.00 to 600.00 seconds in steps of 0.01 (definite time) or
user-defined curve
Reset delay: ...........................................................0.00 to 600.00 seconds in steps of 0.01
Timing accuracy: ................................................±3% or ±20 ms (whichever is greater)
Operate time:........................................................<3 cycles at 1.10 × pickup
NEUTRAL 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
Inverse, IEC (BS) A, IEC (BS) B, IEC (BS) C, IEC Short Inverse, IAC
Inverse, IAC Short Inverse, IAC Very Inverse, IAC Extremely
Inverse, I
2
t, FlexCurves™ (programmable), definite time (0.01
second base curve)
Curve multiplier:..................................................0.01 to 600.00 in steps of 0.01
Reset type: .............................................................instantaneous/timed (per IEEE)
Timing accuracy at 1.03 to 20 × pickup: .±3.5% of operating time or ±1 cycle (whichever is greater)
NON-VOLATILE LATCHES
Type: .........................................................................set-dominant or reset-dominant
Number: ..................................................................16 (individually programmed)
Output:.....................................................................stored in non-volatile memory
Execution sequence:.........................................as input prior to protection, control, and FlexLogic™
