Woodward
Manual MRIK3-C EN
20
DOK-TD-MRIK3-C Rev. A
5.3.10 Description of the status transition
to
from
inactive reclaim
time
ready starting
(dead time)
cycle (auto
reclosing)
blocked
inactive
C.B.
manual
ON
external
blocking
signal
reclaim
time
reclaim
time
expired
external
blocking
signal
ready
C.B. OFF
protection
energized
and/or
tripped and
C.B.-energy
OK
external
blocking
signal
starting
starting
con-
ditions not
fulfilled
start signal
interrupted
start
condi-
tions fulfilled
(fault time,
C.B. OFF
etc.)
external
blocking
signal
cycle
AR
takes
place
external
or
internal
blocking
signal
blocked
external
reset of
blocking
Table 5.1: AR-status transition matrix
From Table 5.1 you can detect what status transitions of MRIK3-C are possible. When the unit is
for instance in "cycle" status (see also para. 4.3) only two status transitions are possible:
status transition to "ready"-status when the auto reclosing takes place
status transition to "blocked" status by external or internal blocking.
The grey shaded sections indicate that no transition is possible.
5.3.11 AR information inputs
By means of the information inputs the MRIK3-C decides whether and when automatic reclosing
may take place. The functions are assigned via the function assignment of the digital inputs as far
as they are required. (refer to chapter 6.12.5)
If one of the three CB position indicators described in the following is activated, it must also be
used because otherwise no correct function indication is possible.
CR = "CB ready" signal (e.g. motor switch or spring power storage)
With this function the CB ready message is signalled.
CI = "CB feedback CB – ON"
With this function the CB position ON is signalled. Signal = 1 = CB is switched on.
CO = "CB feedback CB – OFF
With this function the CB position OFF is signalled. Signal = 1 = CB is switched off.
