ABB RELION 615 Series Applications Manual page 87

1MRS758272 B
REG615
Application Manual
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
DOPPDPR1_OPERATE
DOPPDPR2_OPERATE
DOPPDPR3_OPERATE
GUID-4329A417-1C4A-4FEB-9F49-42B862F2C77D V2 EN
Figure 91: Directional overpower protection function
Two instances of underpower protection DUPPDPR are provided. Normally these are
used in coordination with reverse active power protection.
SEQSPVC1_FUSEF_U
CB_NOT_CLOSED
SEQSPVC1_FUSEF_U
CB_NOT_CLOSED
DUPPDPR1_OPERATE
DUPPDPR2_OPERATE
GUID-E9DA8FC8-3AE7-4BD0-801E-E9FEC0CEE143 V2 EN
Figure 92: Directional underpower protection function
On losing excitation, generator may over speed and operate as an induction generator
taking reactive power from the system which may reduce system voltages, three-
phase underexcitation protection UEXPDIS is provided to detect such conditions.
Directional underpower protection is disabled when the generator circuit breaker is in
open position.
REG615 standard configurations
DOPPDPR1
BLOCK OPERATE
START
DOPPDPR2
BLOCK OPERATE
START
DOPPDPR3
BLOCK OPERATE
START
OR6
B1 O
B2
B3
B4
B5
B6
DUPPDPR1
BLOCK OPERATE
DISABLE START
DUPPDPR2
BLOCK OPERATE
DISABLE START
OR
B1 O
B2
Section 3
DOPPDPR1_OPERATE
DOPPDPR1_START
DOPPDPR2_OPERATE
DOPPDPR2_START
DOPPDPR3_OPERATE
DOPPDPR3_START
DOPPDPR_OPERATE
DUPPDPR1_OPERATE
DUPPDPR1_START
DUPPDPR2_OPERATE
DUPPDPR2_START
DUPPDPR_OPERATE
81