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Remote: The remote operator, i.e., the
SCADA operator, is allowed to issue
controls to the Fusesavers connected to
the RCU. If the remote LED is not lit,
then all FS controls from the remote
operator will be rejected.
Siemens Connect: A Siemens Connect
session is currently in progress with the
Fusesavers and is allowed to send trip/
close controls to the Fusesavers. All FS
controls originating from the RCU,
whether they are local or remote, will be
rejected.
Control in progress
This LED will flash to indicate that a control
issued by the FS control panel is in progress.
The control-in-progress LED will stop
flashing when one of the following
conditions is met:
The control has been sent to the
Fusesavers and the control is successful,
e.g., close control has been sent and all
phases are now closed.
The control has been sent to the
Fusesavers but the control has timed out
after 70 s without being successful, e.g.,
close control has been sent but not all
phases are closed after 70 s.
No further panel controls are allowed while
the control in progress LED is flashing. The
typical time for a protection control to be
applied is 10-20 s and for a trip or close
control is 40-60 s.
Fusesaver operate
The FS trip/close LEDs indicate the current
open/close state for each phase of the FS
line.
If no LED is lit for a phase, this means there
is no data available for that phase.
The trip button will issue ganged-trip control
to all Fusesavers on the line. The close
button will issue a ganged-close control to
all Fusesavers on the line.
A ganged trip or ganged close will command
all Fusesavers on the line to trip/close only if
communications are normal to each and
every FS. If communications have failed to
any FS, then no trip/close command will be
sent to any FS.
Once a trip or close control is issued to the
Fusesavers, the corresponding status LEDs
will begin to flash (i.e., a trip control in
progress will flash trip LEDs). The trip/close
status LEDs flash in conjunction with
control-in-progress LED to indicate which
control is currently in progress. The status
LEDs will stop flashing when the control in
progress has finished.
It is possible to issue controls to Fusesavers
that are already in the required state, e.g.,
sending a trip control to Fusesavers that are
already open. In this scenario, the RCU will
still send the control to the Fusesavers. The
control in progress LEDs will begin to flash
but will stop soon after as the Fusesavers
are already in the desired state. The benefit
of this is, for example, if two phases are
tripped and one is closed, pressing the trip
control will open the closed FS and bring
the phases to the same state. If independent
trip/close control of Fusesavers is required, it
is necessary to use the Siemens Connect PC
application (refer to Fusesaver operating
instructions IC1000-F320-A170-XX-XXXX).
Protection mode
The FS protection status indicates the
currently active "protection modes" for each
phase of the FS line.
If no LED is lit for a protection bit on a
phase, this means there is no data available
for that phase.
The FS control panel protection controls are
ganged controls which will command all
Fusesavers on the line to change a
protection bit only if communications are
normal to each and every FS. If
communications have failed to any
Fusesaver, then no protection bit change
command will be sent to any Fusesaver.
Once a protection control is issued to the
Fusesavers, the corresponding status LEDs
will begin to flash, e.g., a PROT ON control
in progress will flash PROT ON LEDs and the
Control-In-Progress LED. The status LEDs will
stop flashing when the control in progress
has finished (see Control in progress).
It is possible to issue controls to Fusesavers
that are already in the control state, e.g.,
sending a PROT ON control to Fusesavers
that are already have protection on. In this
scenario, the RCU will still send the control
to the Fusesavers. The control in progress
LEDs will begin to flash, but will stop soon
after as the Fusesavers are already in the
desired state.
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