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In order to ensure safe operation of the overall system, in a risk analysis certain process
parameters have been classified as being critical. The parameters cooling water
temperature (07.025), ambient air monitoring (34.0.20), and the redundant safety pressure
combination device (01.0.50), are hard wired in addition to the PLC and are included in the
shutdown sequence of the converter.
The FU is installed in one or several EMC-compliant electrical cabinet(s) (Rittal type) with
door air conditioning units and is mounted on the self-contained framework construction.
With systems from type SMOevo
complete converter unit is mounted on one half of the skid.
The electrical interfaces of the FU cabinets are designed in the form of two connector sets
(type Harting) so that the two framework halves do not need to be wired.
FU units with water-cooled power electronics have a process technology interface in the form
of Swagelok connections.
The FU consists of the following main function groups in all its design options:
Power semiconductor kit as a complete assembly with 6-pulse rectifier, designed as a
•
network-driven bridge circuit and IGBT power block.
DC-link
•
Digital control unit (DICON)
•
Winding material (medium-voltage transformer, intermediate circuit choke, network
•
commutation choke).
Locally acting measurement and control technology.
•
Components for implementing the EMC concept.
•
The locally acting control technology monitors the FU operation and generates fault
messages which are displayed as clear text messages on the HMI of the control cabinet.
Manual_SMOevoPLUS_eng_01.2019.doc
Manual Ozone Generating System SMOevo
PLUS
510 on, the framework construction is split and the
PLUS
System Description
page 58 of 179
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