4 Short-circuit / motor protection
4.1 Short-circuit protection
32
EMS2…-SWD Electronic motor starter
10/19 MN120008EN
www.eaton.com
4.1.2 Use in UL environment
EMS2-…-SWD electronic motor starters are suitable for use
•
in a circuit with a maximum of 480 V and a symmetrical short-circuit
current of maximum 5 kA;
•
in a circuit with a maximum of 480 V and a symmetrical short-circuit
current of maximum 100 kA, provided they are protected with a 30-A
fuse (type J or CC or equivalent);
•
in a “group installation” in a circuit with a maximum of 480 V and a
symmetrical short-circuit current of maximum 5 kA;
•
in a “group installation”, suitable for use in a circuit with a maximum of
480 V and a symmetrical short-circuit current of maximum 100 kA,
provided they are protected with a 30-A fuse (type J or CC or equivalent);
Table 10: Fuse protection in UL environment (“group installation”)
Device type
SCCR
Max. permissible
supply voltage
Type of coordina-
tion
20A RK5
5 kA
480 V
1
30A CC
100 kA
480 V
1
WARNING
For use with a “low voltage, limited energy, isolated power
supply” use copper cables approved to at least 75 °C.
The device is designed for use with a “low voltage, limited
energy, isolated power supply”.
