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06/10 MN03402004Z-DE/EN
1
Motor-protective circuit-breaker
PKE12 and PKE32
Foreword
In addition to the regulations in accordance with
EN 60079-14 and VDE 0165 Part 1, separate regulations for
the corresponding degrees of protection apply to the
protection of motors in potentially explosive atmospheres.
The standard EN 60079-7 requires additional measures for
motors with ignition protection type “e” “Increased Safety”.
These measures provide an increased level of safety and thus
prevent the possibilities of impermissibly high temperatures
and the occurrence of sparks and arcing in motors in which
this does not occur in normal operation. The motor-
protective devices for this that are themselves not located in
the Ex e area must be certified by an accredited certification
body.
For motors in potentially explosive dust-air mixtures,
standard EN 61214 specifies additional measures.
Directive 94/9/EC (ATEX 100a) on the approximation of the
laws of the Member States concerning devices and
protective systems intended for use in potentially explosive
areas has been in force since 30.06.2003.
Motor-protective circuit-breaker PKE is PTB-approved
according to Directive 94/9/EC (ATEX 100a).
The following standards have been applied to ensure
functional safety:
• Risk analysis of hazards, hazardous situations and
hazardous events to EN ISO 14121,
• Determination of SIL using the risk graph according to
IEC 61508,
• Verification of implementation of the measures against
systematic faults to IEC 61511.
h
The EU prototype test certification number is:
PTB 10 ATEX 3021.
Summary of Contents for PKE12 Series
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