179
6
F
2
S
0
8
3
4
application, however, the measurement result is expressed as a fault section instead of a
percentage.
For the fault locator, see Section 2.8.3
Relevant events
Such events as autoreclose, re-tripping following the reclose-on-to-a fault or autoreclose and
tripping for evolving faults are recorded with time-tags.
Power system quantities
The following power system quantities in pre-faults and post-faults are recorded. The pre-fault
power system quantities are values at 10 seconds before tripping.
(However, the power system quantities are not recorded for evolving faults.)
- Magnitude and phase angle of phase voltage (Va, Vb, Vc)
- Magnitude and phase angle of phase-to-phase voltage (Vab, Vbc, Vca)
- Magnitude and phase angle of symmetrical component voltage (V1, V2, V0)
- Magnitude and phase angle of phase voltage for autoreclose (Vs1, Vs2)
- Magnitude and phase angle of phase current (Ia, Ib, Ic)
- Magnitude and phase angle of phase-to-phase current (Iab, Ibc, Ica)
- Magnitude and phase angle of symmetrical component current (I1, I2, I0)
- Magnitude of parallel line zero sequence current (I0m)
- Resistive and reactive component of phase impedance (Ra, Rb, Rc, Xa, Xb, Xc)
- Resistive and reactive component of phase-to-phase impedance (Rab, Rbc, Rca, Xab, Xbc,
Xca)
- Percentage of thermal capacity (THM%)
Phase angles above are expressed taking that of positive sequence voltage as a reference phase
angle. Phase impedance and phase-to-phase impedance are the ones seen by the reactance
elements.
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Summary of Contents for GRZ100-211B
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