ABB RELION 615 Series Applications Manual page 119

1MRS758272 B
REG615
Application Manual
Overexcitation protection OEPVPH is provided to protect the generator against
overexcitation. Due to overexcitation, saturation of the magnetic core of generator and
connected transformer may occur, and stray flux may be induced in nonlaminated
components that are not designed to carry flux. Excessive flux also causes excessive
eddy currents resulting into excessive voltage between laminations causing
overheating and damage to insulation.
SEQSPVC1_FUSEF_U
GUID-151F93B0-B003-4817-8900-63991380915E V2 EN
Figure 153: Overexcitation protection function
General start and operate signals from all functions are connected to minimum pulse
timer TPGAPC1 for setting the minimum pulse length for the outputs. The output
from TPGAPC1 is connected to binary output.
REG615 standard configurations
OEPVPH1
BLOCK OPERATE
START
BLK_RESTART
COOL_ACTIVE
Section 3
OEPVPH1_OPERATE
OEPVPH1_START
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