
CARLO GAVAZZI Automation Components. Specifi cations are subject to change without notice. Illustrations are for example only.
5
above-mentioned control devices in order
to allow complete remote-plant supervision.
Medium and large power plants (hydro,
thermal, nuclear), as well as substations, are
controlled by sophisticated DCS’s whose
electrical input data (relevant to the different
systems composing the whole plant) can
be provided by Carlo Gavazzi power
quality analysers, such as the WM30,
WM40 or WM5, via the serial port by
using the Modbus RTU or TCP protocol, or
through an OPC server. If communication is
interrupted for any reason, the WM40 can,
if required, be equipped with a datalogger
module, allowing the system to recover
the missing information. The fl exible and
comprehensive ability of these instruments
to manage the information and convert
Current
transformers
Monitoring relays Timers Digital panel meters
CTD/TADK DLA71
DTA/PTA 01/02
DPC02/DPC72
HAA
DAA/DMB
UDM40
UDM60
USC
them it into alarms or warnings - thanks
to their PLC-like AND/OR logic - allows
money and space to be saved, as all the
features of any additional components
are implemented in our hardware. When
dealing with single distribution-gear,
control-gear or switch-gear (present not
only in generation facilities but also in
production sites and other infrastructures)
whereas in the past 3 analogue ammeters
and a voltmeter (whose input was selected
by a rotary switch) were used, the target is
to replace these with a single multifunction
meter or more high-performing digital
instrumentation. This results in the saving of
both space and money.
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