Protection Elements - GE L60 Instruction Manual

Line phase comparison system
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CHAPTER 2: PRODUCT DESCRIPTION

2.5.1 Protection elements

The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated. FlexLogic
operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect with other
protection or control elements of the relay, building FlexLogic equations, or interfacing with other intelligent electronic
devices (IEDs) or power system devices via communications or different output contacts. If not specified, the operate times
given here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
87PC SCHEME
Signal selection:
Angle reference:
Fault detector low:
Mixed signal overcurrent:
I
× Z – V
:
2
2
dI
/ dt:
2
dI
/ dt:
1
I
overcurrent:
1
I
overcurrent:
2
Fault detector high:
Mixed signal overcurrent:
I
× Z – V
:
2
2
dI
/ dt:
2
dI
/ dt:
1
I
overcurrent:
1
I
overcurrent:
2
Signal symmetry
adjustment:
Channel delay
adjustment:
Channel adjustments:
Operate time (typical):
Trip security:
Second coincidence timer:
Enhanced stability angle:
Charging current compensation:
PHASE DISTANCE
Characteristic:
Number of zones:
Directionality:
Reach (secondary Ω):
Reach accuracy:
Distance:
Characteristic angle:
Comparator limit angle:
Directional supervision:
Characteristic angle:
Limit angle:
Right blinder (Quad only):
Reach:
Characteristic angle:
Left Blinder (Quad only):
Reach:
Characteristic angle:
Time delay:
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
mixed I_2 – K × I_1 (K = 0.00 to 0.25 in steps of 0.01), or 3I_0
0 to 360° leading in steps of 1
0.02 to 15.00 pu in steps of 0.01
0.005 to 15.000 pu in steps of 0.001
0.01 to 5.00 pu in steps of 0.01
0.01 to 5.00 pu in steps of 0.01
0.20 to 5.00 pu in steps of 0.01
0.02 to 5.00 pu in steps of 0.01
0.10 to 15.00 pu in steps of 0.01
0.005 to 15.000 pu in steps of 0.001
0.01 to 5.00 pu in steps of 0.01
0.01 to 5.00 pu in steps of 0.01
0.50 to 5.00 pu in steps of 0.01
0.05 to 5.00 pu in steps of 0.01
–5.0 to 5.0 ms in steps of 0.1
0.000 to 30.00 ms in steps of 0.001
channel delay and signal symmetry compensation
¾ cycle for single phase comparison
½ cycle for dual phase comparison
first coincidence or enhanced
10 to 200 ms in steps of 1
40 to 180° in steps of 1
0.100 to 65.535 kΩ in steps of 0.001
mho (memory polarized or offset) or quad (memory polarized or non-directional), selectable indi-
vidually per zone
3
forward, reverse, or non-directional
0.02 to 500.00 Ω in steps of 0.01
±5% including the effect of CVT transients up to an SIR of 30
30 to 90° in steps of 1
30 to 90° in steps of 1
30 to 90° in steps of 1
30 to 90° in steps of 1
0.02 to 500 Ω in steps of 0.01
60 to 90° in steps of 1
0.02 to 500 Ω in steps of 0.01
60 to 90° in steps of 1
0.000 to 65.535 s in steps of 0.001
SPECIFICATIONS
2
2-17

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