MC30-R2
Doc. N°
MO-0462-ING
Copyright 2012
FW: 1290.37.01.x
Date
06.09.2022
Rev.
1
Pag.
18
of
38
3.10 - RCL - Reclosing function
FuncEnab
→
Enable
[Disable / Enable]
Options
→
Rsh
1
[1 / 2 / 3 / 4]
TripLev
→
No Param
No Parameters
Timers
→
RCLtr
5
s
(0.10
300)
step
0.1
s
→
RCLt1
2
s
(0.10
300)
step
0.1
s
→
RCLt2
4
s
(0.10
300)
step
0.1
s
→
RCLt3
6
s
(0.10
300)
step
0.1
s
→
RCLt4
8
s
(0.10
300)
step
0.1
s
Description of variables
FuncEnab
: If disable the function is disactivated
Rsh
: Number of reclosure shots to Lock-out.
RCLtr
: Reset interval (reclaim time)after any successful reclosure
RCLt1
: Reclosing time interval of first reclosing shot
RCLt2
: Reclosing time interval of 2
nd
reclosing shot
RCLt3
: Reclosing time interval of 3
rd
reclosing shot
RCLt4
: Reclosing time interval of 4
th
reclosing shot
The status of the Circuit Breaker (C/B) is indicated by one normally open contact of the C/B itself and is
detected by a digital input of the relay.
Any time the Circuit Breaker (C/B) is closed either manually or automatically the Reclaim time “RCLtr”
is
started.
During “RCLtr” after
manual closure of the C/B operation starting of any of the protection function stops
the “RCLtr” time counting:
-
if the protection element is reset before tripping, the timer “
RCLtr
” is restarted.
-
it the protection function trips (end of its trip time delay) the autoreclosure is blocked.
Autoreclose shot is started on C/B opening
after “RCLtr”
operated by tripping of one of the
protection functions programmed to control the first reclose shot;
C/B opening operated manually or by one function not programmed to control the next reclosure shot,
activates the Lock-out status of the Automatic Reclosure.
Reset from the Lock-out status takes place by manual closure of the C/B.
Autoreclose shots (after the first) are started on C/B opening
during “RCLtr”
operated by tripping
of one of the protection functions programmed to control this reclose shot;
Dur
ing “RCLtr” operation starting (during the trip time delay) of any of the protection functions
programmed to initiate the next Reclosure Shot, stops the “
RCLtr
” time counting:
-
if the protection element is reset before tripping, the timer “
RCLtr
” is resta
rted.
-
if the protection element trips (end of its trip time delay) the Automatic Reclosure sequence
proceeds initiating the next reclosure shot.
C/B opening operated manually or by one function not programmed to control the next reclosure shot,
activates the Lock-
out status of the Automatic Reclosure and the indication of “
”.
Reset from the Lock-out status takes place by manual closure of the C/B.
After “
RCLtr
”
is expired the relay is ready for a new reclosure sequence.
As soon as the C/B is opened due to tripping of one of the protection functions programmed to initiate an
automatic reclosure shot, the relevant reclose time delay (
RCLt1, RCLt2, RCLt3, RCLt4
) is started and, at
the end of this time delay, the reclose command is issued. The C/B is then automatically reclosed and the
reclaim time “
RCLtr
”
is started again.
If the closed status of the C/B is not detected within 0.3s from expiry of the reclose time delay, the relay
indicates “
”.
