GE D90 Plus Instruction Manual page 38

SPECIFICATIONS
28
GROUND DISTANCE
Characteristic:...................................................... mho (memory polarized or offset) or quad (memory polarized
Reactance polarization:................................... negative-sequence or zero-sequence current
Non-homogeneity angle:................................–40 to 40° in steps of 1
Zones:....................................................................... 5
Directionality:........................................................ forward, reverse, or non-directional per zone
Reach (secondary ohms):................................0.02 to 250.00 ohms in steps of 0.01
Reach accuracy: ................................................. ±5%, including the effect of CVT transients up to an SIR of 30
Distance characteristic angle:...................... 30 to 90° in steps of 1
Comparator limit angle: .................................. 30 to 90° in steps of 1
Characteristic angle:......................................... 30 to 90° in steps of 1
Limit angle: ............................................................ 30 to 90° in steps of 1
Z0/Z1 magnitude:............................................... 0.00 to 10.00 in steps of 0.01
Z0M/Z1 angle: ...................................................... –90 to 90° in steps of 1
Z0M/Z1 magnitude:........................................... 0.00 to 7.00 in steps of 0.01
Z0/Z1 angle: .......................................................... –90 to 90° in steps of 1
Right and left blinder reach:.......................... 0.02 to 500.00 ohms in steps of 0.01
Right and left blinder characteristic
angle: .................................................................. 60 to 90° in steps of 1
Time delay: ............................................................ 0.000 to 65.535 seconds in steps of 0.001
Timing accuracy: ................................................ ±3% or 4 ms (whichever is greater)
Current supervision level: ............................... neutral current (3I_0)
Current supervision pickup:........................... 0.050 to 30.000 pu in steps of 0.001
Memory duration:............................................... 5 to 25 cycles in steps of 1
Voltage supervision pickup:........................... 0 to 5.000 pu in steps of 0.001 (series compensation
Operation time:.................................................... 1 to 1.5 cycles (typical)
Reset time: ............................................................. 1 power cycle (typical)
or non-directional), selectable individually per zone
for V < 1.1 × V
nominal
applications)
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION