Table of Contents
Advertisement
4.4.3 Climate Control Units
April 2007
If you use climate control units, then the regulations under IEC 61800-1:1997
must be followed (and where applicable, the German version EN 61800-
1:1998 as well).
Errors with serious consequences for the electronic components in the
electrical cabinet are repeatedly made when climate control units are
used.
Warning
By cooling the air, the relative humidity in the electrical cabinet increases,
which can lead to the formation of condensation on the cooler surfaces of
the inverters. Under certain circumstances, this condensation can lead to
flashovers and destruction of the electronic components.
If the temperature without cooling in the electrical cabinet is +40 °C and the
relative humidity is 50%, then condensation already forms when the air is
cooled to approx. +27 °C.
The Mollier h-x diagram helps to illustrate the changes that occur in the humid
air.
Environmental Conditions
4 – 19
Advertisement
Chapters
Table of Contents
