Configuration
6.3 Short-circuit protection
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
55
Either fuses (fused design) or motor starter protectors/circuit breakers (acc. to UL) (fuseless
design) must be used for short-circuit protection. The types of coordination must also be
considered when selecting load feeders from the tables.
About coordination of
corresponding short-circuit
protective devices with overload
relays
in the configuration guide titled "Configuring SIRIUS Innovations -
Selection data for load feeders in fuseless and fused designs"
(http://support.automation.siemens.com/WW/view/en/50250592)
(article no.: 3ZX1012-0RA21-1AC0)
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