IEC11000055 V1 EN
Figure 100: The tripping logic phase segregated output SPTPTRC used for
single-phase tripping application
11.2.2.2 Lock out
This function block is provided with possibilities to initiate lock-out. The lock-out can
be set to only activate the block closing output CLLKOUT or initiate the block closing
output and also maintain the trip signal (latched trip).
The lock-out can then be manually reset after checking the primary fault by activating
the input reset lock-out RSTLKOUT.
If external conditions are required to initiate Lock-out but not initiate trip this can be
achieved by activating input SETLKOUT. The setting AutoLock = Off will mean that
the internal trip will not activate lock-out so only initiation of the input SETLKOUT
will result in lock-out. This is normally the case for overhead line protection where
most faults are transient. Unsuccessful auto-reclose and back-up zone tripping can in
such cases be connected to initiate Lock-out by activating the input SETLKOUT.
11.2.2.3 Blocking of the function block
Blocking can be initiated internally by logic, or by the operator using a
communication channel. Total blockage of the Tripping logic phase segregated output
SPTPTRC function is done by activating the input BLOCK and can be used to block
the output of SPTPTRC in the event of internal failures.
11.2.3 Setting guidelines
The parameters for Tripping logic phase segregated output SPTPTRC function are set
via the local HMI or PCM600.
The following trip parameters can be set to regulate tripping.
Program
Set the required tripping scheme depending on value selected 3 phase or 1Ph/3Ph.
Operation
1MRK 505 291-UEN A Section 11
Logic
249
Application manual
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