Protective Elements
Equivalent circuit at mains failure.
In case of mains failure or auto reclosing the generator suddenly feeds a very high consumer load. The rotor
displacement angle is decreased repeatedly and the voltage vector V1 changes its direction (V1').
Voltage vectors at mains failure.
413
MRU4
DOK-HB-MRU4-2E
Grid
V´ = I´
1
* j Xd
V
P
V´
1
I
1
Generator
Load
V
P
V
1
V´
1
V´ = I´
1
* j Xd
