2 Motor starters
2.5 Layout of devices with I
e
= 9 A
EMS2… Electronic motor starter
10/19 MN034003EN
www.eaton.com
17
2.5 Layout of devices with I
e
= 9 A
When using devices with a rated operational current I
e
of 9 A, note that the
permissible thermal continuous current I
L
depends on the type of mounting
and the ambient temperature. See diagram below.
Moreover, the maximum permissible current of 56 A must not be exceeded,
even in startup.
Figure 8: Thermal continuous current I
L
according to ambient temperature
a
When mounting the devices with a minimum distance of 20 mm
b
With devices in a row
The maximum current during startup of the motor is derived by multiplying
the motor rated current with the “startup factor”, which with standard asyn-
chronous motors is usually between 6 and 10.
Contact the motor manufacturer to establish the actual value.
EMS2 devices with a rated operational current I
e
of 2.4 A or 3 A can be
operated at temperatures up to 60 °C without restriction.
T
A
[°C]
0
10
20
30
40
50
60
6
8
0
4
2
9
7
5
3
1
I
L
[A]
①
②
