ABB RELION 615 Series Applications Manual page 54

Section 3
REG615 standard configurations
48
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
NSPTOV1_OPERATE
NSPTOV2_OPERATE
GUID-01CC7A27-4BEA-4B17-B211-CF220E427F49 V2 EN
Figure 27: Negative sequence overvoltage protection function
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
PSPTUV1_OPERATE
PSPTUV2_OPERATE
GUID-A29D56F4-F604-4693-B58D-76D43E1ED19B V2 EN
Figure 28: Positive sequence undervoltage protection function
The selectable underfrequency or overfrequency or rate of change of frequency
protection FRPFRQ prevents damage to the 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 as per system requirement.
NSPTOV1(U2>(1))
BLOCK OPERATE
START
NSPTOV2(U2>(2))
BLOCK OPERATE
START
OR
B1 O
B2
PSPTUV1(U1<(1))
BLOCK OPERATE
START
PSPTUV2(U1<(2))
BLOCK OPERATE
START
OR
B1 O
B2
1MRS758272 B
NSPTOV1_OPERATE
NSPTOV1_START
NSPTOV2_OPERATE
NSPTOV2_START
NSPTOV_OPERATE
PSPTUV1_OPERATE
PSPTUV1_START
PSPTUV2_OPERATE
PSPTUV2_START
PSPTUV_OPERATE
REG615
Application Manual