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Figure 48: RCU Connect ‒ RCU communicating correctly with Fusesavers
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Using this data and the displays on the RCU,
the user satisfies themselves that the site is
working correctly.
A suggested checklist for confirming
successful RCU commissioning at a site is:
1. "RCU Battery" LED on.
2. "Switchgear OK" LED on.
3. Switchgear line name correct.
4. RCU messages being received by SCADA
and being responded to by the RCU. The
"Protocol Tx" and "Protocol Rx" LEDs on
the front of the RCU can be used for this
or the protocol counters in RCU Connect.
5. RCU source supply on.
6. Dummy control of Fusesaver working
from SCADA operator for all phases.
7. "Remote Control" LED on.
8. If a Fusesaver operator control panel is
fitted, then the displays on the panel
show the correct switchgear state, the
correct protection mode and all phases
are healthy.
Reset RCU configuration procedure
Under some circumstances, it may be
desirable to reset the configuration in the
RCU back to the default.
This is achieved by the following method:
1. Press and hold the door switch at the
top of the electronics housing.
2. Turn the Remote Control OFF switch ON
and OFF five times within 5 seconds.
This need might arise if, for example, a user
has configured the RCU with an USB
antenna with the wrong customer number
in it. In this case, a user with the correct USB
antenna will not be able to connect to the
RCU to re-configure it because it has been
configured with the wrong customer
number. However, by following the above
method, the configuration will be cleared
from the RCU and it will then be available
for configuration by the user.
SCADA protocol testing
It is usual for each utility to configure the
SCADA protocol and exhaustively test every
point and control. This can be very difficult
and time consuming to achieve without the
support of special test equipment.
Siemens provides such a utility called RCU
Probe which gives visibility into the RCU
database and allows hand overriding of
database points. Using RCU Probe, the
expert user can prove the protocol
configuration and operation of the protocol
prior to the configuration being distributed
to the installation team.
RCU Probe has its own user manual (IC1000-
F320-A201-XX-XXXX) and is intended for
use by the appropriate technical expert. It is
not suitable for use outside of the
acceptance test workshop since it connects
to the RCU using the Ethernet port on the
RCU and provides unrestricted control of
Fusesavers.
Contact Siemens for further information.
Customer number
Each end customer has a unique customer
code and this code is embedded in the USB
antenna. The code is sent as part of the
configuration to both Fusesavers (with
Siemens Connect utility) and to RCUs with
the RCU Connect utility. When searching for
Fusesavers, RCU will only find those
Fusesavers that have a customer number
that matches the RCU customer number.
This ensures that different utilities will not
be able to operate each other's Fusesavers
or be able to connect to each other's RCUs.
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