Section 11 Logic
11.1 Tripping logic common 3-phase output SMPPTRC
11.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Tripping logic common 3-phase output SMPPTRC
SYMBOL-K V1 EN
94
11.1.2 Application
All trip signals from the different protection functions shall be routed through the trip
logic. In its simplest alternative the logic will only link the internal TRIP signals to a
binary output and make sure that the pulse length is long enough.
The tripping logic common 3-phase output (SMPPTRC) offers only three-phase
tripping. A three-phase trip for all faults offers a simple solution and is often sufficient
in well meshed transmission systems and in High Voltage (HV) systems.
One SMPPTRC function block should be used for each breaker, if the object is
connected to the system via more than one breaker.
To prevent closing of a circuit breaker after a trip the function can block the closing
of the circuit breaker (trip lock-out).
11.1.2.1 Three-phase tripping
A simple application with three-phase tripping from the tripping logic common 3-
phase output SMPPTRC utilizes part of the function block. Connect the inputs from
the protection function blocks to the input TRIN. If necessary (normally the case) use
the trip matrix logic TMAGGIO to combine the different function outputs to this
input. Connect the output TRIP to the required binary outputs.
A typical connection is shown below in figure
99.
1MRK 505 291-UEN A Section 11
Logic
245
Application manual
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