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Depending upon the configuration settings
chosen by the utility, the operator may be
required to switch the remote control ON/
OFF toggle switch to the remote control OFF
position prior to attempting to apply
controls to the Fusesaver via the operator
panel. If the operator does not do this and
tries to apply a control by pressing a button
on the panel, the control will be rejected.
The operator can send controls to the
Fusesavers by pressing the appropriate
button on the panel. On pressing a button,
the following sequence of events will occur:
1. The LED lights on the button will begin
to blink to indicate the RCU is
attempting to apply the controls to the
Fusesaver.
2. So long as the Fusesaver can accept
controls from the RCU (i.e., the external
lever is UP and is the Fusesavers are not
in session with Siemens Connect), the
controls will be passed to the Fusesaver.
Typically this takes 15-20 s, however can
take up to 70 s before the RCU will
time-out.
3. Once the control is successfully applied,
the LEDs on the panel will change to
reflect the new state of the Fusesavers.
There can be a delay of 5-10 s before the
state update occurs.
4. If the control was not successfully
applied, then the LEDs will stop blinking
and the Fusesaver state will remain as
previously indicated.
The operator panel can be turned off by
pressing the "Panel ON" button again (the
LED lights will go out), or by closing the RCU
door.
Each of the buttons on the Fusesaver
Operator Control Panel has the following
functionality.
Panel on
The control panel will be off when the
cubicle door is opened and is turned on by
pressing the panel on button. When the
control panel is on, the LED adjacent to the
panel on button will be lit. The control panel
can be turned off by pressing the panel on
button while the panel is already on or by
closing the RCU door. When the control
panel is off, no LEDs will be lit.
Figure 49: Fusesaver operator control panel
Fusesaver status
The FS status LEDs indicate the current
status for each phase of the FS line. If no
LED is lit for a phase, this means no data is
available for that phase. These Fusesaver
statuses are:
Fusesaver line current is on or off
Fusesaver external lever is up or down
Fusesaver protection is running or
halted.
Fusesaver control source
The control source LEDs indicate who has
permission to send controls to the
Fusesavers connected to the RCU. The
possible control sources are:
Local: This control panel is allowed to
issue controls to the Fusesavers
connected to the RCU. If the Local LED is
not lit, then all FS controls from the
control panel will be rejected. This
includes both trip/close and protection
controls.
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