
70
Definite time non-directional overcurrent
protection (TOC)
Chapter 5
Current
2.4
Logic diagram
Figure 28:
TOC function, logic diagram
2.5
Input and output signals
Table 79:
Input signals for the TOC (TOC--) function block
Path in local HMI: ServiceReport/Functions/TimeDelayOC/FuncOutputs
Table 80:
Output signals for the TOC (TOC--) function block
en01000179.vsd
TOC--BLOCK
TOC - TIME DELAYED OVERCURRENT FUNCTION
TEST-ACTIVE
&
TEST
BlockTOC= Yes
>1
STIL1
STIL2
STIL3
TOC--TRP
TOC--TRIP
&
&
TOC--BLKTR
&
t
tP
&
Function Enable
Trip Blocking
>1
TOC--STP
TOC--STL1
TOC--STL2
&
STIN
TOC--STL3
TOC--STN
t
tN
&
TOC--TRN
>1
Signal
Description
BLOCK
Block of the overcurrent function.
BLKTR
Block of trip from the overcurrent function
Signal
Description
TRIP
Trip by time delayed overcurrent function.
TRP
Trip by time delayed phase overcurrent function when included
TRN
Trip by the time delayed residual overcurrent function when included
STP
Start of phase overcurrent function when included
STL1
Start phase overcurrent, phase L1 when phase overcurrent function
included
STL2
Start phase overcurrent, phase L2 when phase overcurrent function
included
STL3
Start phase overcurrent, phase L3 when phase overcurrent function
included
STN
Start of the time delayed residual overcurrent function when included
Summary of Contents for REL 551-C1*2.5
Page 1: ...Technical reference manual ProtectIT Line differential protection terminal REL 551 C1 2 5 ...
Page 23: ...14 Introduction to the technical reference manual Chapter 1 Introduction ...
Page 39: ...30 Technical data Chapter 2 General ...
Page 63: ...54 Blocking of signals during test BST Chapter 3 Common functions ...
Page 71: ...62 Line differential protection phase segregated DIFL Chapter 4 Line differential protection ...
Page 89: ...80 Thermal phase overload protection THOL Chapter 5 Current ...
Page 101: ...92 Event function EV Chapter 7 Logic ...
Page 163: ...154 Terminal diagrams Chapter 11 Diagrams Figure 39 REL 551 C1 with DC switch ...