SIRIUS 3RT2 contactors/contactor assemblies
2.4 Configuration
SIRIUS Innovations
122 System Manual, 01/2011, A8E56203870002-03
2.4.3.4 Installation altitude
The 3RT2 power contactors (sizes S00 and S0), 3RH2 power contactors, and contactors for
railway applications are approved for installation altitudes up to 2,000 m. The reduced air
density at altitudes higher than 2,000 meters affects the contactors' electrical characteristics.
The reduction factors which have to be taken into account when using contactors at altitudes
higher than 2,000 m are specified in the table below. More information can be obtained on
request from Technical Assistance (www.siemens.com/lowvoltage/
techni
cal-assistance).
Table 2- 10 Installation altitude for 3RT2 contactors and 3RH2 contactor relays
Installation altitude Rated operational current
2,000 m to 2,500 m 0.93 x I
e
Up to 3,000 m 0.88 x I
e
Up to 3,500 m 0.83 x I
e
Up to 4,000 m 0.78 x I
e
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