ABB Relion 670 Series RES670, Technical Manual

Page: 418 / 888

Additional logic, including a timer tWaitForPHS, secures a three-phase trip command for
these protection functions in the absence of the required phase selection signals.
The expanded SMPPTRC (94) function has three trip outputs TR_A, TR_B, TR_C
(besides the trip output TRIP), one per phase, for connection to one or more of the IEDs
binary outputs, as well as to other functions within the IED requiring these signals. There
are also separate output signals indicating single-pole, two-pole or three-pole trip. These
signals are important for cooperation with the autorecloser SMBRREC (79) function.
The expanded SMPPTRC (94) function is equipped with logic which secures correct
operation for evolving faults as well as for reclosing on to persistent faults. A special input
is also provided which disables single- pole and two-pole tripping, forcing all tripping to
be three-pole.
In multi-breaker arrangements, one SMPPTRC (94) function block is used for each
breaker. This can be the case if single pole tripping and autoreclosing is used.
The breaker close lockout function can be activated from an external trip signal from
another protection function via input (SETLKOUT) or internally at a three-pole trip, if
desired.
It is possible to lockout seal in the tripping output signals or use blocking of closing only
the choice is by setting
TripLockout .
15.1.1.1 Logic diagram
TRINP_A
TRINP_B
TRINP_C
1PTRZ
1PTRGF
TRINP_3P
OR
OR
OR
Program = 3 phase
AND
INTL_ABCTRIP
ANSI05000517-3-en.vsd
ANSI05000517 V3 EN
Figure 140: Three-phase front logic — simplified logic diagram
Section 15
1MRK 511 365-UUS A
Logic
412 Phasor measurement unit RES670 2.1 ANSI
Technical manual