Function Block - ABB REL 551-C1*2.5 Technical Reference Manual

2.3
Definite time non-directional overcurrent
protection (TOC)

Function block

TOC--
TOC
BLOCK TRIP
BLKTR TRP
TRN
STP
STL1
STL2
STL3
STN
xx00000197.vsd
Figure 25: TOC function block, phase + N
TOC--
TOC
BLOCK TRIP
BLKTR TRP
STP
STL1
STL2
STL3
xx00000681.vsd
Figure 26: TOC function block, phase
TOC--
TOC
BLOCK TRIP
BLKTR TRN
STN
xx00000709.vsd
Figure 27: TOC function block, N
Chapter 5
Current
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