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37
User Manual V1.1-2022-01-05 Appendix
Protection category denition
Moisture location category denition
Environment category denition
Appendix
Moisture Parameters
Level
3K3 4K3 4K4H
Temperature Range 0~+40°C -33~+40°C ~20~+55°C
Moisture Parameters 5%~85% 15%~100% 4%~100%
Environment Condition Ambient Temperature Relative Humidity Applied to
Outdoor -20~50°C 4%~100% PD3
Indoor Unconditioned -20~50°C 5%~95% PD3
Indoor conditioned 0~40°C 5%~85% PD2
Category I
Applies to equipment connected to a circuit where measures have been
taken to reduce transient overvoltage to a low level.
Category II
Applies to equipment not permanently connected to the installation.
Examples are appliances, portables tools and other plug-connected
equipment.
Category III
Applies to a xed equipment downstream, including the main
distribution board. Examples are switchgear and other euiquipment in
an industrial installation.
Category IV
Applies to equipment permanently connected at the origin of an
installation (upstream of the main distribution board). Examples are
electricity meters, primary over-current protection equipment and other
equipment connected directly to outdoor open lines.
Overvoltage category denition
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