ABB Relion 650 Series Technical Manual page 372

Section 12
Logic
Tripping logic SPTPTRC (94) function for single- and three-pole tripping has additional phase
segregated inputs for this, as well as inputs for faulted phase selection. The latter inputs enable
single- and three-pole tripping for those functions which do not have their own phase selection
capability, and therefore which have just a single trip output and not phase segregated trip
outputs for routing through the phase segregated trip inputs of the expanded SPTPTRC (94)
function. Examples of such protection functions are the residual overcurrent protections. The
SPTPTRC (94) function has two inputs for these functions, one for impedance tripping (for
example, carrier-aided tripping commands from the scheme communication logic), and one for
ground fault tripping (for example, tripping output from a residual overcurrent protection).
Additional logic secures a three-pole final trip command for these protection functions in the
absence of the required phase selection signals.
The SPTPTRC (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 P3PTR is also provided which
disables single pole tripping, forcing all tripping to be three-pole. See figure 200.
TRINP_3P
TRINP_A
PS_A
TRINP_B
PS_B
TRINP_C
PS_C
1PTRGF
1PTRZ
ANSI10000267 V1 EN-US
Figure 200: Phase segregated front logic
366
AND
AND
AND
OR
OR
- loop
OR
AND
AND
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OR
OR
OR
OR
-loop
AND
AND
50 ms
OR
2
1MRK 506 326-UUS B
TR_A
TR_B
TR_C
ANSI10000267-1-en.vsd
Line distance protection REL650
Technical manual