Configuration
6.6 Application environment
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
76 Manual, 09/2016, A5E03656507420A/RS-AB/003
The following information must be taken into account when planning applications involving
overload relays.
The overload relays are approved for installation altitudes up to 2,000 m. The reduced air
density at altitudes higher than 2,000 meters affects the overload relays' electrical
characteristics. The reduction factors which have to be taken into account when using
overload relays at altitudes higher than 2,000 m can be obtained on request from Technical
Assistance on the Internet (http://www.siemens.com/sirius/technical-assistance).
Operating conditions and resistance to extreme climates
The overload relays are climate-proof.
The overload relays are not sensitive to external influences such as shocks, corrosive
ambient conditions, ageing, and temperature fluctuations.
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