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b.
However, if no Fusesaver line name
has been entered, then the RCU will
search for Fusesavers within range
of its short-range radio.
13. If the RCU finds at least one Fusesaver in
a line, it will continue searching for the
other Fusesavers on that line until the
search times out after several minutes.
However, if it can't find any working
Fusesavers, it will restart itself and
search for any Fusesaver over again. The
RCU will do this three times and then
stop. This prevents continual restarts
generating nuisance alarms for the
SCADA system. To get the RCU to search
again, the RCU must be restarted either
by remote control or by a local operator.
It is strongly advised that only one RCU and one
set of Fusesavers be within range at the same
time. For workshop testing, this means ensuring
additional RCUs are turned off and additional
Fusesavers do not have communications modules
fitted.
If multiple Fusesaver lines coexist at a single site,
please contact Siemens for advice on how to
manage these sites.
Site checking
The user can check a RCU configuration by
clicking on the "Maintain/Check RCU" button
from the main menu of RCU Connect. This
allows the user to view RCU data, and data
about the connection the RCU has to the
Fusesaver line.
From the "Maintain/Check RCU" screen (see
Figure 47), the user can also save the
configuration, restart the RCU and set the
clock on the RCU (this can be useful if a
connection to the SCADA network has not
been made, for example, when testing in
the workshop).
In the "RCU Status" section, the user can find
information regarding the battery life
remaining, communication statistics, and
some diagnostic information on the power
supply and configuration. If there is a
problem with the connection between the
RCU and the Fusesaver line, the "Fusesaver
Config Error" box is checked (see Figure 47).
If this occurs, there is a problem with the
RCU configuration, the Fusesaver line
configuration, or the radio connection
between the two.
Figure 47: RCU Connect ‒ maintain/check window
When the configuration and connection is
working correctly, the user will see
something similar to Figure 48: RCU
Connect ‒ RCU communicating correctly
with Fusesavers on page 50. Under
Fusesaver status, the line name, number of
Fusesavers in the line and serial number of
each Fusesaver can be seen, as well as the
individual Fusesaver status for each device.
In the example shown in Figure 48, the
Fusesaver line has line current, the devices
are all closed, communications is OK,
protection is running, and the protection
mode is normal.
49
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