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2.3. Standard and regulations
2.3.1. fabrication
The Vmax, Vmax/w circuit-breakers conform to the following
Standards:
– DIN VDE 0670, part 104, and IEC 62271-100
– DIN VDE 0847, part 4, and IEC 61000-4
– IEEE C37.04
2.3.2. installation and operation
For assembly and operation, please refer to the relative
regulations, and in particular to:
– ANSI / NFPA70
– NEC
2.3.3. Service conditions
Normal service conditions
Follow the recommendations in the IEC 62271-1 and 62271-
100 Standards. In more detail:
IEEE C37.09
IEEE C37.54 – C37.20.2.
ambient temperature
Maximum
+ 40 °C
Average maximum over 24 hours
+ 35 °C
Minimum for indoor installation
- 30 °C
humidity
The average value of the relative humidity, measured for a period longer
than 24 hours, must not exceed 95%
The average value of the pressure of the water vapour without
condensation, measured for a period longer than 24 hours, must not
exceed 2.2 kPa.
The average value of the relative humidity, measured for a period longer
than 1 month, must not exceed 90%.
The average value of the pressure of the water vapour, measured for a
period longer than 1 month, must not exceed 1.8 kPa.
altitude
< 1000 (3300 ft.) m above sea level.
For application above 1000m (3300 ft.) C37.20.2 is applicable
Climate
To avoid the risk of corrosion or other damage in areas:
– with a high level of humidity, and/or
– with rapid and large temperature variations, take appropriate steps
(for example, by using suitable electric heaters) to prevent condensation
phenomena.
For special installation requirements or other operating
conditions, please contact Abb.
