that the trip is two phases by connecting the output TR2P to the input TR2P in the
SMBRREC (79) function.
17.1.2.4 Lock-out
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
An example how to connect the directional data from different application functions to the
trip function is given below, see Figure 386:
1MRK 506 369-UUS - Section 17
Logic
Line distance protection REL670 2.2 ANSI 795
Application manual
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