universiti putra malaysia digital protection of power transformer ...
universiti putra malaysia digital protection of power transformer ...
universiti putra malaysia digital protection of power transformer ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Ipu<br />
ICH<br />
ICD<br />
1 0<br />
If]<br />
IRxl(fault) )<br />
IRx I (pre-fault)<br />
Iyl<br />
K<br />
LP<br />
PT<br />
T<br />
TF<br />
Are Primary Currents for Three Phase, A, B, C.<br />
Are Secondary Currents for Three Phase, A, B, C.<br />
Differential Current.<br />
Restraining Current.<br />
Pickup Current.<br />
Combined Hannonic Component in the Differential Current.<br />
Combined Differential Current.<br />
The Initial Value <strong>of</strong> the DC Offset At Time T=O.<br />
The Peak Value <strong>of</strong> the nth Hannonic Component.<br />
The Second-Hannonic Which Present in the Differential Current.<br />
Fundamental Components, Which Present in the Differential<br />
Current.<br />
The Currents at Rx Before the Occurrence <strong>of</strong> A Fault.<br />
The Currents at Rx After the Occurrence <strong>of</strong> A Fault.<br />
The Pre-Fault Positive-Sequence Current at the Fault Location.<br />
A Compensation Factor.<br />
The Leakage Inductances <strong>of</strong> the Primary Windings.<br />
Are the Leakage Inductances <strong>of</strong> the Secondary Windings.<br />
Low Pass.<br />
Turns Ratios <strong>of</strong> Primary Current Transfonner.<br />
Turns Ratios <strong>of</strong> Secondary Current Transfonner.<br />
Potential Transfonner.<br />
The Sampling Interval in Second.<br />
Threshold Value <strong>of</strong> Minimum di/dt.<br />
XIX
Change language