Manual Ozone Generating System SMOevo
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Rev. 1.0
Page 49 of 91
CV610-2
07.0.80
Actuated ball
valve
Is cycled open/shut by the temperature control TC. This
prevents cold water from flowing through the converter and
possibly forming condensation water when the system is out
of operation. The converter temperature monitor TAH makes
the system switch off and triggers a fault message if the limit
value is exceeded.
BV310-11
07.0.85
Ball valve
Outelt isolation valve for converter cooling cycle. Must b efull
yopen during normal operation
5.3.5 Subassembly 23: Converter
The converter technology (FU – frequency converter) used in the system generates a
medium-frequency, single-phase alternating voltage from 3-phase power supply with a fixed
frequency of 50/60Hz. The generated single-phase AC voltage is transferred to a medium-
voltage level by means of a step-up transformer.
A pulse converter with variable operating frequency with a dynamic range of 0.1% -100% is
used. (corresponds to a frequency range of 1 Hz - 1000 Hz).
The following table shows an overview of the units in use.
Type
Technology
Allocation
SMOevo System
Remarks
VF W 60 IGBT
VF IGBT
SMOevo 610/660
Water-cooled power block
VF = variable frequency converter
IGBT = insulated-gate bipolar transistor
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 (TT310-2 / 07.0.40) and the redundant safety pressure combination device
(PSH310-1 / 01.0113 and PSH310-2 / 01.0.114), 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.
