Lock Out - ABB REL650 Applications Manual

1MRK 506 334-UUS A
13.2.2.2
13.2.2.3
13.2.3
Application manual
Note also that if a second line protection is utilizing the same SESRSYN
(25) the three-pole trip signal must be generated, for example by using the
three-trip relays contacts in series and connecting them in parallel to the
TR3P output from the trip block.
The trip logic also has inputs TRIN_A, TRIN_B and TRIN_C where phase-selected trip
signals can be connected. Examples can be individual phase inter-trips from remote end
or internal/external phase selected trip signals, which are routed through the IED to
achieve, for example SESRSYN (25), Breaker failure, and so on. Other back-up functions
are connected to the input TRIN as described above. A typical connection for a single-pole
tripping scheme is shown in figure 204.
Figure 204: The tripping logic phase segregated output SPTPTRC (94) used for
single-pole tripping application

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 = Disabled 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.
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 (94)
function is done by activating the input BLOCK and can be used to block the output of
SPTPTRC (94) in the event of internal failures.
Setting guidelines
The parameters for Tripping logic phase segregated output SPTPTRC (94) function are
set via the local HMI or PCM600.
Section 13
Logic
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