ABB RELION 615 Series Applications Manual page 85

1MRS758272 B
REG615
Application Manual
BLOCK_UV
BLOCK_UV
PSPTUV1_OPERATE
PSPTUV2_OPERATE
GUID-BA97F786-296F-4A90-B583-113018D9592E V2 EN
Figure 88: Positive sequence undervoltage protection function
Residual overvoltage protection ROVPTOV provides protection against stator earth
faults from 5% to 100% of winding from neutral. Two instances of ROVPTOV are
provided.
ROVPTOV1_OPERATE
ROVPTOV2_OPERATE
GUID-FD66FB6E-AE3B-485A-B94D-5051B110C860 V2 EN
Figure 89: Residual overvoltage protection function
The selectable underfrequency or overfrequency or rate of change of frequency
protection FRPFRQ prevents damage to network components under unwanted
frequency conditions. The function also contains a selectable rate of change of the
frequency (gradient) protection to detect an increase or decrease in the fast power
system frequency at an early stage. This can be used as an early indication of a
disturbance in the system. Configuration offers six instances of frequency protection,
these instances can be configured to operate as underfrequency or overfrequency or
rate of change of frequency according to the system requirement. The frequency
protection is blocked when generator CB is in open position.
REG615 standard configurations
PSPTUV1
BLOCK OPERATE
START
PSPTUV2
BLOCK OPERATE
START
OR
B1 O
B2
ROVPTOV1
BLOCK OPERATE
START
ROVPTOV2
BLOCK OPERATE
START
OR
B1 O
B2
Section 3
PSPTUV1_OPERATE
PSPTUV1_START
PSPTUV2_OPERATE
PSPTUV2_START
PSPTUV_OPERATE
ROVPTOV1_OPERATE
ROVPTOV1_START
ROVPTOV2_OPERATE
ROVPTOV2_START
ROVPTOV_OPERATE
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