DOPPDPR1
BLOCK
OPERATE
START
DOPPDPR2
BLOCK
OPERATE
START
DOPPDPR3
BLOCK
OPERATE
START
OR6
B1
B2
B3
B4
B5
B6
O
DOPPDPR1_OPERATE
DOPPDPR1_OPERATE
DOPPDPR2_OPERATE
DOPPDPR2_OPERATE
DOPPDPR3_OPERATE
DOPPDPR3_OPERATE
DOPPDPR1_START
DOPPDPR2_START
DOPPDPR3_START
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
DOPPDPR_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.
DUPPDPR1
BLOCK
DISABLE
OPERATE
START
DUPPDPR2
BLOCK
DISABLE
OPERATE
START
OR
B1
B2
O
DUPPDPR1_OPERATE
DUPPDPR1_OPERATE
DUPPDPR2_OPERATE
DUPPDPR2_OPERATE
DUPPDPR1_START
DUPPDPR2_START
SEQSPVC1_FUSEF_U
SEQSPVC1_FUSEF_U
CB_NOT_CLOSED
CB_NOT_CLOSED
DUPPDPR_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.
1MRS758272 B
Section 3
REG615 standard configurations
REG615
81
Application Manual