ABB Relion 670 Series Applications Manual page 225

1MRK 511 407-UUS Rev. J
The single-pole tripping can include different options and the use of the different inputs in the
function block. Inputs TRINP_A, TRINP_B, and TRINP_C shall be used for trip signals from functions
with built-in pole selection logic such as distance or line differential protection functions.
The inputs 1PTRZ and 1PTRGF are used for single-pole tripping from functions which do not have
built-in pole selection logic:
• 1PTRZ can be connected to the carrier aided trip signal from the distance protection scheme
(it means that another distance protection function has seen or detected the fault)
• 1PTRGF can be connected to an earth fault function such as EF4PTOC or a carrier aided trip
signal from the earth fault protection scheme
These two inputs are combined with the external phase selection logic. Phase selection signals
from the external phase selector must be connected to the inputs PS_A, PS_B, and PS_C to achieve
the tripping on the respective single-pole trip outputs TR_A, TR_B, and TR_C. The output TRIP is a
general trip and is always activated independent of which phase is involved. Depending on which
phases are involved the outputs TR1P and TR3P will be activated as well.
When single-pole tripping schemes are used, a single-phase autoreclosing attempt is expected to
follow. For cases where the autoreclosing is not in service or will not follow for some reason, the
input prepare three-pole trip P3PTR must be activated. This input is normally connected to the
output PREP3P on the autorecloser function SMBRREC (79) but can also be connected to other
signals, for example, an external logic signal. If two circuit breakers are involved, one SMPPTRC
block instance and one SMBRREC (79) instance are used for each circuit breaker. This will ensure
correct operation and behavior of each circuit breaker.
The output TR3P must be connected to the input TR3P on the SMBRREC (79) function in order to
switch SMBRREC (79) to perform a three-pole reclosing. If this signal is not activated, SMBRREC
will use single-pole dead time.
Other back-up functions are connected to the input TRINP_3P as described above for three-pole
tripping. A typical connection for a single-pole tripping scheme is shown in figure 85.
Phasor measurement unit RES670
Application manual
If a second line protection is utilizing the same SMBRREC (79), the three-pole trip
signal must be generated as OR conditions from both line protections.
© Copyright 2017 Hitachi Power Grids. All rights reserved
Section 15
Logic
219