2-16
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
2
87PC SCHEME
Signal selection:
mixed I_2 – K × I_1 (K = 0.00 to 0.25 in steps of 0.01), or 3I_0
Angle reference:
0 to 360° leading in steps of 1
Fault detector low:
Mixed signal overcurrent:
0.02 to 15.00 pu in steps of 0.01
I
2
× Z – V
2
:
0.005 to 15.000 pu in steps of 0.001
dI
2
/ dt:
0.01 to 5.00 pu in steps of 0.01
dI
1
/ dt:
0.01 to 5.00 pu in steps of 0.01
I
1
overcurrent:
0.20 to 5.00 pu in steps of 0.01
I
2
overcurrent:
0.02 to 5.00 pu in steps of 0.01
Fault detector high:
Mixed signal overcurrent:
0.10 to 15.00 pu in steps of 0.01
I
2
× Z – V
2
:
0.005 to 15.000 pu in steps of 0.001
dI
2
/ dt:
0.01 to 5.00 pu in steps of 0.01
dI
1
/ dt:
0.01 to 5.00 pu in steps of 0.01
I
1
overcurrent:
0.50 to 5.00 pu in steps of 0.01
I
2
overcurrent:
0.05 to 5.00 pu in steps of 0.01
Signal symmetry
adjustment:
–5.0 to 5.0 ms in steps of 0.1
Channel delay
adjustment:
0.000 to 30.00 ms in steps of 0.001
Channel adjustments:
channel delay and signal symmetry compensation
Operate time (typical):
¾ cycle for single phase comparison
½ cycle for dual phase comparison
Trip security:
first coincidence or enhanced
Second coincidence timer:
10 to 200 ms in steps of 1
Enhanced stability angle:
40 to 180° in steps of 1
Charging current compensation:
0.100 to 65.535 k
Ω
in steps of 0.001
PHASE DISTANCE
Characteristic:
mho (memory polarized or offset) or quad (memory polarized or non-directional), selectable indi-
vidually per zone
Number of zones:
3
Directionality:
forward, reverse, or non-directional
Reach (secondary
Ω
):
0.02 to 500.00
Ω
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
Directional supervision:
Characteristic angle:
30 to 90° in steps of 1
Limit angle:
30 to 90° in steps of 1
Right blinder (Quad only):
Reach:
0.02 to 500
Ω
in steps of 0.01
Characteristic angle:
60 to 90° in steps of 1
Left Blinder (Quad only):
Reach:
0.02 to 500
Ω
in steps of 0.01
Characteristic angle:
60 to 90° in steps of 1
Time delay:
0.000 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
Current supervision:
Level:
line-to-line current
Pickup:
0.050 to 30.000 pu in steps of 0.001
Dropout:
97 to 98%
Memory duration:
5 to 25 cycles in steps of 1
VT location:
all delta-wye and wye-delta transformers
CT location:
all delta-wye and wye-delta transformers
