1 Electronic motor starter EMS-DOS/ROS-SWD
1.1 Foreword
Electronic motor starter EMS-...-SWD
12/18 MN034002ZU-DE/EN
www.eaton.com
45
1 Electronic motor starter EMS-DOS/ROS-SWD
1.1 Foreword
In addition to the regulations in accordance with EN 60079-14 and
VDE 0165-1, separate regulations for the corresponding types 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 improve
the degree of safety and prevent impermissible high temperature and
development of sparking and arcing, which is usually not found when motors
are operated under normal conditions. The motor-protective devices for this
that are themselves not located in the Ex area must be certified by an
accredited certification body.
For for motors in potentially explosive dust-air mixtures, standard norm
EN 60079-14 specifies additional measures. Directive 94/9/EC (ATEX 100a)
respectively 2014/34/EU 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 06.30.2003.
1.2 Overview of the devices EMS-…
EMS electronic motor starters can be used to functionally drive and protect
three-phase asynchronous motors, as well as to safely switch them off.
EMS motor starters combine the following functions for this purpose:
•
Anticlockwise motor rotation,
•
Clockwise motor rotation,
•
Motor protection (overload protection plus detection of phase failures
and phase imbalance).
•
Category 3 controlled stop safety function.
The internal interlock circuit and load wiring keep wiring complexity to a
minimum. Moreover, the integrated SmartWire-DT interface is used both to
power the electronic motor starter and to control the motor's direction of
rotation. EMS-DOS/ROS-SWD electronic motor starters also use the
SmartWire-DT interface in order to provide additional information for the
corresponding programmable logic controller. Finally, the EMS-…series
includes various versions with different functions.
NOTICE
The operation with single phase loads (motors) respectively
parallel wiring of phases is not possible!
