ABB REL650 series Technical Manual page 541

1MRK 506 335-UUS A
Technical manual
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 256.
TRINP_3P
TRINP_A
PS_A
AND
TRINP_B
PS_B
AND
TRINP_C
PS_C
AND
OR
1PTRGF
1PTRZ
ANSI10000267 V1 EN
Figure 256: Phase segregated front logic
OR
OR
- loop
-loop
OR
AND
AND
Section 13
OR
OR
OR
AND
AND
50 ms
OR
2
ANSI10000267-1-en.vsd
Logic
TR_A
TR_B
TR_C
535