GE D90 Plus Instruction Manual page 37

CHAPTER 2: PRODUCT DESCRIPTION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
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)
SPECIFICATIONS
27