GE D90 Plus Instruction Manual page 40

SPECIFICATIONS
32
OPEN POLE DETECTOR
Functionality: ........................................................ detects an open pole condition, monitoring breaker auxiliary
Current pickup level:.......................................... 0.000 to 30.000 pu in steps of 0.001
Line capacitive reactances:........................... 300.0 to 9999.9 secondary ohms in steps of 0.1
Remote current pickup level: ........................ 0.000 to 30.000 pu in steps of 0.001
Current dropout level:....................................... pickup + 3%; not less than 0.05 pu
OVERFREQUENCY
Elements:................................................................ 2
Pickup level:........................................................... 20.00 to 65.00 Hz in steps of 0.01
Dropout level: ....................................................... pickup level – 0.03 Hz
Level accuracy:.................................................... ±0.01 Hz
Time delay: ............................................................ 0 to 65.535 seconds in steps of 0.001
Timer accuracy: .................................................. ±3% or 4 ms (whichever is greater)
PHASE DIRECTIONAL OVERCURRENT
Relay connection: ............................................... 90° (quadrature)
Quadrature voltage:.......................................... phase A (V
Polarizing voltage threshold:......................... 0.000 to 3.000 pu in steps of 0.001
Current sensitivity threshold: ........................ 0.05 pu
Characteristic angle:......................................... 0 to 359° in steps of 1
Angle accuracy:................................................... ±2°
Tripping operation time:.................................. <12 ms, typically (reverse load, forward fault)
Blocking operation time: ................................. <8 ms, typically (forward load, reverse fault)
PHASE DISTANCE
Characteristic:...................................................... mho (memory polarized or offset) or quad (memory polarized
Zones:....................................................................... 5
Directionality:........................................................ forward, reverse, or non-directional per zone
Reach: ...................................................................... 0.02 to 250.00 ohms in steps of 0.01 (secondary ohms)
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
Distance limit angle:.......................................... 30 to 90° in steps of 1
Directional supervision characteristic
angle: .................................................................. 30 to 90° in steps of 1
Directional supervision limit angle:............ 30 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: ............................... line-to-line current
Current supervision pickup:........................... 0.050 to 30.000 pu in steps of 0.001
Memory duration:............................................... 5 to 25 cycles in steps of 1
CT location:............................................................ all delta-wye and wye-delta transformers
VT location:............................................................ all delta-wye and wye-delta transformers
Voltage supervision pickup:........................... 0.000 to 5.000 pu in steps of 0.001 (series compensation
contacts, the current in each phase and optional voltages on
the line
), phase B (V
BC
sequence; phase A (V
phase sequence
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
), phase C (V ) for ABC phase
CA AB
), phase B (V ), phase C (V
CB AC BA
) for ACB