Insulation coordination for the electrical system of wind ... - IEA Wind
Insulation coordination for the electrical system of wind ... - IEA Wind
Insulation coordination for the electrical system of wind ... - IEA Wind
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<strong>Insulation</strong> testing<br />
Generator trans<strong>for</strong>mer<br />
Testing according to IEC 60076, IEC60836<br />
Power frequency 1 minute<br />
Phase to ground<br />
Phase to phase<br />
Across <strong>the</strong> isolating distance<br />
Lightning impulse 1.2/50 micro seconds<br />
Phase to earth and between phases<br />
Across isolating distance<br />
60 kV<br />
60 kV<br />
80 kV<br />
170 kV (8.9 pu phase-ground)<br />
195 kV<br />
Plat<strong>for</strong>m trans<strong>for</strong>mer<br />
Power frequency 1 minute 50 Hz 275 kV/70 kV<br />
50 seconds 120 Hz 272 kV/66 kV<br />
Lightning impulse IEC 60076 1.2/50 micro seconds<br />
HV <strong>wind</strong>ing Phase-Ground<br />
645 kV (8.58 pu)<br />
LV <strong>wind</strong>ing Phase-Ground<br />
196 kV<br />
© Vattenfall AB<br />
6
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