This standard classifies groups of environmental parameters and
their severities to which products are subjected during portable
and non-stationary use, including periods of transfer, down time,
maintenance and repair.
The environmental conditions covered by these groups
– the environmental conditions at locations where the product
may be placed or used temporarily;
– the change of environmental parameters due to change of
– the environmental conditions related to transfer of the
product between different locations.
The environmental conditions classified do not take into account
the use profile of the product, i.e. whether the product is used
only during a temporary stationary state, during the state of
transfer or arbitrarily.
The conditions of portable and non-stationary use to which
products may be exposed include land-based and offshore,
weatherprotected and non-weatherprotected locations. The conditions
further include transfer which is a part of the portable and
The environmental conditions specified in this standard are
limited to those which may directly affect the performance of
products. Only environmental conditions as such are considered. No
special description of the effects of these conditions on the
product is given.
Environmental conditions directly related to fire or explosion
hazards and conditions related to ionizing radiation are excluded.
Any other unforeseen incidents are also excluded. The possibility
of their occurence should be taken into account in special
Microclimate within a product is not included.
Conditions of stationary use, use in vehicles, and ships, and
conditions of storage and transportation are given in other
sections of IEC 60721-3.
A limited number of classes of environmental conditions is
given, covering a broad field of application. The user of this
standard should select the lowest classification necessary for
covering the conditions of the intended use.
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