4 Short-circuit / motor protection
4.1 Short-circuit protection
26 EMS2… Electronic motor starter 10/19 MN034003EN www.eaton.com
4.1.2 Use in UL environment
EMS2 electronic motor starters are suitable for use
• in a circuit with maximum 480 V and a symmetrical short-circuit current
of maximum 5 kA;
• in a circuit with maximum 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 maximum 480 V and a symmet-
rical short-circuit current of maximum 5 kA;
• in a “group installation”, suitable for use in a circuit with a maximum of
480V and a symmetrical short-circuit current of maximum 100 kA, pro-
vided they are protected with a 30-A fuse (type J or CC or equivalent);
Table 9: 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 sup-
ply” use copper cables approved to at least 75 °C.
The device is designed for use with a “low voltage, limited
energy, isolated power supply”.
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