Siemens SIPROTEC 7SD80 - Page 88

Functions
2.4 Backup Overcurrent
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
88
Pickup Logic and Tripping Logic
The pickup signals of the individual phases (or ground) and of the individual elements are interlinked in such a
way that both the phase information and the element which has picked up are indicated (Table 2-1).
Table 2-2 Pickup signals of the single phases
The trip is signaled specifically for each element, e.g. „67(N)-B2 TRIP“.
Behavior during Measuring Voltage Failure
An element-specific parameter, e.g. 67(N)-B1 on FFM allows you to define how the directional overcurrent
protection acts when the measuring voltage fails. The overcurrent protection then works either Non-
Directional or it is .
Internal indication Display Output indication No.
67-1 PU A
67-2 PU A
67-TOC PU A
2-30
2-31
67-1 PU B
67-2 PU B
67-TOC PU B
2-30
2-31
67-1 PU C
67-2 PU C
67-TOC PU C
2-30
2-31
67-1 PU N
67-2 PU N
67-TOC PU N
2-30
2-31
67-1 PU A
67-1 PU B
67-1 PU C
67-1 PU N
2-30
2-30
2-30
2-30
„67(N)-B2 PICKUP“ 7251
67-2 PU A
67-2 PU B
67-2 PU C
67-2 PU N
„67(N)-B1 PICKUP“ 7250
67-TOC PU A
67-TOC PU B
67-TOC PU C
67-TOC PU N
2-31
2-31
2-31
2-31
„67(N)-TOC PICK.“ 7252
(All pickups)