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Safety Considerations
Safety Manual
MN042004EN March 2017 www.eaton.com
About this Manual
This manual applies to Eaton Power Xpert® C445 Motor
Management Relay. The manual describes a Motor
Management Relay suitable for the protection of Ex e motors in
potentially explosive atmospheres.
Target Group
This manual is aimed at specialist personnel who are respon-
sible for the installation, commissioning and maintenance of
motor management overload relays in ATEX applications.
Abbreviations and symbols
Symbols used in this manual have the following meanings:
Ex e
Ignition protection type “Increased Safety”
[Ex d]
Overload protection for motor in type of protection
flame proof enclosures "Ex d"
[Ex e]
Temperature limiter for motor in type of protection
increased safety "Ex e"
[Ex tb]
Temperature limiter for motor in type of dust igni-
tion protection by enclosure "Ex tb"
IA
Starting Current
IN
Rated Operational Current
UL
Certification Service
Certification Body: Accredited certification authority
for devices operated
BCM
Base Control Module
MM
Measurement Module
tE
Temperature rise time
The temperature rise time tE is the time in which
the temperature of a winding rises from the final
temperature in normal operation to the limit tem-
perature when a starting current is present IA.
u
Indicates actions to be taken.
Tips
Ú
Draws attention to interesting tips.
Further Information
Further information about the Power Xpert® C445 can be found
on the Eaton Website:
www.eaton.eu or www.eaton.com
Power Xpert® C445 Motor Management Relay
Foreword
In addition to the regulations in accordance with EN 60079-14
and VDE 0165 Part 1, separate regulations for the correspond-
ing 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 protec-
tion type “e”, “Increased Safety”. These measures provide an
increased level of safety. This prevents the possibility of imper-
missibly high temperatures and the occurrence of sparks and
arcing in motors which does not occur in normal operation.
The motor-protective devices for this that are themselves not
located in the Ex area must be certified by an accredited certifi-
cation body.
For motors in potentially explosive dust-air mixtures, standard
norm EN 60079-14 specifies additional measures.
Directive 94/9/EC on the approximation of the laws of the
Member States concerning devices and protective systems
intended for use in potentially explosive areas.
Notes and Standards
Due to the heightened risk in potentially explosive areas, the
following notes and standards have to be observed carefully:
• EN 60079-14 / VDE 0165-:
Electrical apparatus for explosive gas atmospheres.
• EN 60079-17:
Inspection and maintenance of electrical installations in
hazardous areas.
• EN 50495:
Safety devices required for the safe functioning of equip-
ment with respect to explosion risks.
Ú
The UL certificate number is : _____________
(to be filled in after receiving certificate)
