2 Motor starter – overview
2.5 Layout of devices with I
e
= 9 A
16
EMS2…-SWD Electronic motor starter
10/19 MN120008EN
www.eaton.com
The maximum current during start-up 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.
Table 6: Thermalcontinuous current I
L
with different mounting situations and I
e
= 9 A
EMS2-…-SWD devices with a rated operational current I
e
of 3 A can be
operated at temperatures up to 55°C without restriction.
Table 7: Thermal continuous current I
L
with different mounting situations and I
e
= 3 A
for EMS2-…-9-SWD devices
Ambient temperature
Rated uninterrupted current I
U
with mounting situation
40 °C
45 °C
50 °C
55 °C
Single device, top-hat rail horizontal, motor feeder on bottom
9 A
9 A
9 A
7.6 A
Linked devices with a device width distance (22.5 mm),
Top-hat rail horizontal, motor feeder on bottom
9 A
9 A
6.8 A
6.1 A
Linked devices without spacing
Top-hat rail horizontal, motor feeder on bottom
5.2 A
3 A
–
–
for devices EMS2-…-3-SWD
Ambient temperature
Rated uninterrupted current I
U
with mounting situation
40 °C
45 °C
50 °C
55 °C
Single device, top-hat rail horizontal, motor feeder on bottom
3 A
3 A
3 A
3 A
Linked devices with a device width distance (22.5 mm),
Top-hat rail horizontal, motor feeder on bottom
3 A
3 A
3 A
3 A
Linked devices without distance between
Top-hat rail horizontal, motor feeder on bottom
3 A
3 A
–
–
