MV design guide - Schneider Electric
MV design guide - Schneider Electric
MV design guide - Schneider Electric
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Standards<br />
IEC - ANSI comparison<br />
Equipment is <strong>design</strong>ed<br />
to operate under the<br />
following normal<br />
conditions<br />
Normal operating conditions<br />
Temperature<br />
Standards 0°C Installation<br />
ambient instantaneous indoor outdoor<br />
IEC minimal - 5°C - 25°C<br />
maximal + 40°C + 40°C<br />
maximum average 35°C 35°C<br />
daily value<br />
ANSI minimal - 30°C<br />
maximal + 40°C<br />
N.B.:<br />
For all equipment operating under conditions other than those described above, derating must<br />
be provided (see derating chapter).<br />
Altitude<br />
According to IEC<br />
c The altitude must not exceed 1 000 metres, otherwise the equipment<br />
should be derated.<br />
According to ANSI<br />
c The altitude must not exceed 3 300 feet (1 000 metres), otherwise the<br />
equipment should be derated.<br />
Humidity<br />
According to IEC<br />
Average relative humidity<br />
Indoor equipment<br />
value over a period<br />
24 hours 95 %<br />
1 month 90 %<br />
According to ANSI<br />
c No specific constraints.<br />
<strong>Schneider</strong> <strong>Electric</strong><br />
Merlin Gerin <strong>MV</strong> Design Guide<br />
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