Default settings: 7s
TEW 7s
.
In terms the duration the earth fault the following applies:
– terd TEW
If the regulator was tuned when the earth fault occurred and the zero sequence
voltage returned its initial value within the transient earth fault time, as-
sumed that the P-coil successfully extinguished the arc.
– terd TEW
If the earth fault lasts longer than the transient earth fault time, might neces-
sary switch off the lines order solve the earth fault. new search process always started the end -
earth fault even the earth fault time smaller than the set transient earth fault time TEW. The P-coil
does not have readjusted. This probably happened
without adjusting the P-coil and without switching off the line sections. ensure that the P-
coil set the right value, search started even the zero sequence voltage
has returned its initial value.
If the regulator searching for new resonance point when the earth fault occurs, the
search immediately aborted.Page 106 Detailed description REG-DP/ REG-DPA parameters
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