ABB RET670 - Setting Guidelines

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.
Blocking of the function block
The function block can be blocked in two different ways. Its use is dependent on the
application. Blocking can be initiated internally by logic, or by the operator using a
communication channel. Total blockage of the trip function is done by activating the
input BLOCK and can be used to block the output of the trip logic in the event of
internal failures. Blockage of lock-out output by activating input BLKLKOUT is used
for operator control of the lock-out function.
3.14.1.2 Setting guidelines
The parameters for Tripping logic SMPPTRC (94) are set via the local HMI or PCM600.
The following trip parameters can be set to regulate tripping.
Operation: Sets the mode of operation. Disabled switches the tripping off. The normal
selection is Enabled.
Program: Sets the required tripping scheme. Normally 3Ph or 1/2Ph are used.
TripLockout: Sets the scheme for lock-out. Disabled only activates the lock-out output.
Enabled activates the lock-out output and latches the output TRIP. The normal
selection is Disabled.
AutoLock: Sets the scheme for lock-out. Disabled only activates lock-out through the
input SETLKOUT. Enabled additonally allows activation through the trip function
itself. The normal selection is Disabled.
tTripMin: Sets the required minimum duration of the trip pulse. It should be set to
ensure that the breaker is tripped correctly. Normal setting is 0.150s.
tWaitForPHS: Sets a duration after any of the inputs 1PTRZ or 1PTREF has been
activated during which a phase selection must occur to get a single phase trip. If no
phase selection has been achieved a three-phase trip will be issued after the time has
elapsed.
Section 3 1MRK504116-UUS C
IED application
740
Application manual