ABB RELION RET670, Applications Manual

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17.1.2.4 Lock-out
M14828-18 v5
The SMPPTRC 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 output TR3P (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 a closing circuit lock-out but not to
lockout trip, this can be achieved by activating input SETLKOUT. The setting
AutoLock = Disabled means 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 autoreclose and
back-up zone tripping can in such cases be connected to initiate lock-out by activating
the input SETLKOUT.
17.1.2.5 Example of directional data
GUID-08AC09AB-2B2F-4095-B06E-1171CF225869 v2
An example how to connect the directional data from different application functions to
the trip function is given below, see Figure
397 :
1MRK 504 163-UUS A
Section 17
Logic
Transformer protection RET670 2.2 ANSI 843
Application manual