Connection with ATEX motors
The ATEX standard is related to the use of machinery, installations and equipment in areas with a
potentially explosive atmosphere. In the European Union, the use of equipment in these areas Is
regulated by two complementary directives: Directive 1999/92/EC for the installation environment and
worker’s protection, and Directive 94/9/EC for the ATEX equipment. These guidelines and directives are
based on two basic concepts: the classification of potentially explosive areas or zones and the limitation
of equipment that can be installed in each of them.
Power Electronics provides a solution for driving ATEX motors such as “Ex nA”, “Ex d” and “Ex p” under
the ATEX zone areas illustrated below. For different motor and ATEX zone combinations, consult Power
Electronics.
Atex motors and Zones combination
Connection scheme (Example with ZIEHL - PTC Thermistor Relay Type MSR 220 Vi)
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