ABB Relion 670 Series Applications Manual page 459

1MRK 511 401-UEN Rev. K
The single-phase tripping operation mode can include different options and the use of the
different inputs in the function block. Inputs TRINL1, TRINL2, and TRINL3 shall be used for trip
signals from functions with built-in phase selection logic such as distance or line differential
protection functions.
The inputs 1PTRZ and 1PTREF are used for single-phase tripping from functions which do not
have built-in phase 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)
• 1PTREF 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 PSL1, PSL2, and PSL3 to
achieve the tripping on the respective single-phase trip outputs TRL1, TRL2, and TRL3. 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-phase 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-phase trip P3PTR must be activated. This input is
normally connected to the output PREP3P on the autorecloser function SMBRREC 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 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 function in order to
switch SMBRREC to perform a three-phase reclosing. If this signal is not activated, SMBRREC
will use single-phase dead time.
Other back-up functions are connected to the input TRIN as described above for three-phase
tripping. A typical connection for a single-phase tripping scheme is shown in figure 234.
Bay control REC670
Application manual
If a second line protection is utilizing the same SMBRREC, the three-phase trip
signal must be generated as OR conditions from both line protections.
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Section 17
Logic
453