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Service conditions
6
2
Service conditions
ormaSET-M prefabricated substation is designed to be
used under normal outdoor service conditions according to
IEC 62271-1.
Inside the enclosure it is assumed that normal indoor
conditions prevail according to IEC 62271-1.
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Medium voltage functional unit:
□
IEC 62271-200
►
MV / LV transformer functional unit
□
IEC 60076 series
►
Low voltage functional unit
□
IEC 61439 series
Air temperature
►
Minimum:
►
Maximum:
►
Average daily value:
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Maximum average annual temperature: + 20 ºC
Average relative humidity value, measured in a 24 hour
period, must not exceed 95%.
►
Vapour Pressure average (1 month) = 22 mbar.
Altitude
The altitude of the place of installation must not exceed
1000 m.
For working conditions that differ from those given or that
are not mentioned in these instructions, it is necessary to
define what they are and to study how they affect the
design.
In the event of special conditions of use, please consult
Ormazabal.
Degree of pollution
The pollution does not exceed pollution level II (medium),
according to Table 1 of IEC 60815.
Solar radiation
Solar radiation up to a level of 1000 W/m
noon is considered.
Ice coating
The ice coating shall be considered in the range from 1 mm
up to but not exceeding 20 mm.
Wind speed
The wind speed does not exceed 34 m/s.
- 5 ºC
+ 40 ºC
+ 35 ºC
2
on a clear day at
IG-199-EN version 03
General Instructions
ormaSET-M
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