ABB REC650 - Lock-Out Initiation

fault. It can also be used to generate a Lock-out of manual closing until the operator has
reset the Lock-out, see separate section.
10.2.2.12 Lock-out initiation
In many cases there is a requirement that a Lock-out is generated when the auto-reclosing
attempt fails. This is done with logic connected to the in- and outputs of the Autoreclose
function and connected to Binary IO as required. Many alternative ways of performing the
logic exist depending on whether manual closing is interlocked in the IED, whether an
external physical Lock-out relay exists and whether the reset is hardwired, or carried out
by means of communication. There are also different alternatives regarding what shall
generate Lock-out. Examples of questions are:
• Shall back-up time delayed trip give Lock-out (normally yes)
• Shall Lock-out be generated when closing onto a fault (mostly)
• Shall Lock-out be generated when the Auto-Recloser was OFF at the fault
• Shall Lock-out be generated if the Breaker did not have sufficient operating power for
an auto-reclosing sequence (normally not as no closing attempt has been given)
In figures
77 and 78 the logic shows how a closing Lock-out logic can be designed with
the Lock-out relay as an external relay alternatively with the Lock-out created internally
with the manual closing going through the Synchro-check function. An example of Lock-
out logic.
Lock-out
RXMD1
11
12
21
MAIN ZAK CLOSE
CLOSE COMMAND
OR
SMBRREC (79)
OR
CCRBRF (50BF)
BJ-TRIP
ZCVPSOF-TRIP
INHIBIT
UNSUCCL
TRBU
ANSI11000168_2_en.vsd
ANSI11000168 V1 EN
Figure 77: Lock-out arranged with an external Lock-out relay
Section 10 1MRK 511 286-UUS A
Control
204
Application manual