ABB relion REF615 Applications Manual page 343

1MRS756378 S
REF615
Application Manual
The residual overvoltage protection ROVPTOV provides earth fault protection by
detecting an abnormal level of residual voltage. It can be used, for example, as a
nonselective backup protection for the selective directional earth-fault functionality.
ROVPTOV1_OPERATE
ROVPTOV2_OPERATE
ROVPTOV3_OPERATE
GUID-2155DB79-DEBD-4DD9-9384-FD5352967608 V1 EN
Figure 522: Residual voltage protection function
SEQSPVC1_FUSEF_U
GUID-911F6005-2A2B-4012-85F8-BC6D88B453B6 V2 EN
Figure 523: Negative sequence overvoltage protection function
SEQSPVC1_FUSEF_U
GUID-A60BCAA1-D381-4F34-9C15-56DD20DA737E V2 EN
Figure 524: Positive sequence undervoltage protection function
The selectable underfrequency or overfrequency 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.
REF615 standard configurations
ROVPTOV1
BLOCK OPERATE
START
ROVPTOV2
BLOCK OPERATE
START
ROVPTOV3
BLOCK OPERATE
START
OR6
B1 O
B2
B3
B4
B5
B6
NSPTOV1
BLOCK OPERATE
START
PSPTUV1
BLOCK OPERATE
START
Section 3
ROVPTOV1_OPERATE
ROVPTOV1_START
ROVPTOV2_OPERATE
ROVPTOV2_START
ROVPTOV3_OPERATE
ROVPTOV3_START
ROVPTOV_OPERATE
NSPTOV1_OPERATE
NSPTOV1_START
PSPTUV1_OPERATE
PSPTUV1_START
337