Bartec Ex p Control Unit APEX, Руководство пользователя

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Ex p Control Unit
SIEMENS Set
Product description
Rev. 0 01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx Page 19 of 80
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3 Product description
General information
The Ex p control set described here is intended for use in pressurized equipment
in the “containment system“ version.
The set described here is preset for the SIEMENS analyses of the 6 series and
can be used without further parameter settings.
Ex p control unit APEX, type 07-37A2-3211/2726
The APEX control unit of type 07-37A2-3211/2726 is specially
designed for Ex p systems with the concept of a "containment
system with continuous operating flow".
For this purpose, the APEX control unit operates according to
the procedure described in EN 60079-2, chapter 13.3. In this
process, the Ex p control unit purges the protected volume and then safely
prevents the occurrence of a dangerous concentration of explosive gas mixtures
by means of a continuous operating flow.
Due to the higher pressure inside the protected volume compared to the
atmosphere, explosive gases cannot enter the pressurized enclosure from the
outside at any time.
After mounting the APEX control unit and connecting the purge gas connections
to the volume to be protected, and after connecting the mains voltage and purge
gas, the Ex p system starts automatically. The Ex p control with the APEX control
unit regulates the purge gas flow and the nominal enclosure pressure during the
pre-purge phase, as well as the nominal enclosure pressure and the operating
flow during the operating phase.