Lock-Out Initiation - ABB REC650 Applications Manual

Section 10
Control
10.2.2.12
204
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.

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.
SMBRREC (79)
BJ-TRIP
OR
ZCVPSOF-TRIP
CCRBRF (50BF)
TRBU
ANSI11000168 V1 EN
Figure 77: Lock-out arranged with an external Lock-out relay
INHIBIT
UNSUCCL
OR
1MRK 511 286-UUS A
Lock-out
RXMD1
11
21
12
CLOSE COMMAND
MAIN ZAK CLOSE
ANSI11000168
_2_en.vsd
Application manual