Layout Of Devices With Adapter Ems2-Xbb Or Msfs - Eaton EMS2 Series Manual

3 Plug-in motor starter ROSF for mounting on an adapter
3.2 Layout of devices with adapter EMS2-XTH

3.2.1 Layout of devices with adapter EMS2-XBB or MSFS

24
When using EMS2-ROSF devices with a rated operational current I
3 A in conjunction with an EMS2-XBB or MSFS adapter, note that the per-
missible thermal continuous current depends on the type of mounting, the
ambient temperature T
below.
Moreover, the maximum permissible current must not be exceeded, even in
startup. It is not permitted to use the devices described in this Section in
potentially explosive areas (ATEX).
The maximum current during startup of the motor is derived by multiplying
the motor nominal current with the "startup factor", which with standard
asynchronous motors is usually between 6 and 10.
Contact the motor manufacturer to establish the actual value.
I [A]
L
9
8
7
6
5
4
3
2 I = 3 A
e
1
0
20 30 40
Figure 13: Derating curve for devices with I
of 20 mm (at least one free slot between the starters)
T = temperature of the busbar
S
T = ambient temperature in the control panel
A
I [A]
L
9
8
7
6
5
4
3
I = 3 A
2
e
1
0
20 30 40
Figure 14: Derating curve for directly linked devices with I
T = temperature of the current busbar
S
T = ambient temperature in the control panel
A
EMS2... Electronic motor starter 10/19 MN034003EN www.eaton.com
and the temperature T
A
I = 9 A
e
50 60 70 80
= 9 A which are mounted at a minimum distance
e
I = 9 A
e
50 60 70 80
of the busbar. See diagram
S
T
A
T
A
T
A
T
A
T
90 100 110 120
S
T
A
T
A
T
A
90 100 110 120 T
S
= 9 A
e
of 9 A or
e
= 20 °C
= 40 °C
= 60 °C
= 80 °C
[°C]
= 20 °C
= 40 °C
= 60 °C
[°C]