have single-pole tripping, while the slave breaker could have three-pole tripping and
autoreclosing. In the case of a permanent fault, only one of the breakers has to be operated
when the fault is energized a second time. In the event of a transient fault the slave breaker
performs a three-pole reclosing onto the non-faulted line.
The same philosophy can be used for two-pole tripping and autoreclosing.
To prevent closing of a circuit breaker after a trip, the function offers a lockout function.
17.1.2.1 Three-pole tripping
Connect the inputs from the protection function to the input TRINP_3P to combine the
different function outputs to this input. Connect the output TRIP to the binary outputs on
the IO board.
This signal can also be used for other purposes internally in the IED. An example could be
the starting of breaker failure protection. The three outputs TR_A, TR_B, TR_C will
always be activated at every trip and can be utilized on individual trip outputs if single-
pole operating devices are available on the circuit breaker even when a three-pole tripping
scheme is selected.
Set the function block to Program = 3 phase and set the required length of the trip pulse
to for example, tTripMin = 150ms.
The typical connection is shown below in figure
384.
ANSI05000544=3=en.vsd
BLOCK
BLKLKOUT
TRINP_3P
TRINP_A
TRINP_B
TRINP_C
PS_A
PS_B
PS_C
1PTRZ
1PTRGF
P3PTR
SETLKOUT
RSTLKOUT
CND
TRIP
TR_A
TR_B
TR_C
TR1P
TR2P
TR3P
CLLKOUT
BFI_3P
BFI_A
BFI_B
BFI_C
FW
REV
SMPPTRC (94)
Protection functions with 3
phase trip, for example time
delayed overcurrent protection
TMAGAPC
ANSI05000544 V3 EN
Figure 384: Tripping logic SMPPTRC (94) is used for a simple three-pole tripping
application
Section 17 1MRK 506 369-UUS -
Logic
792 Line distance protection REL670 2.2 ANSI
Application manual
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