HEC-OM-O018-A
Chapter 3 Transporting and Installation
3.2 Installation
3-4
3.2.3 Pollution Degree
The pollution degree is a classification from 1 to 4 degrees depending on
the pollution present in the air. This product is suitable for environments with
a pollution degree of 1 or 2.
Table 3-1 Pollution degree classification
Degree 1
There is no pollution or only dry and nonconductive pollution occurs.
An example of an environment of this degree is a clean room or a place using an
air cleaner.
Degree 2
Normally, only nonconductive pollution occurs. The pollution may become
conductive temporarily because of dew condensation.
An example of an environment of this degree is a place where electric equipment
can operate normally, such as a working office or a control panel.
Degree 3
Conductive pollution or dry and nonconductive pollution which can become
conductive when dew condensation occurs. An example of an environment of this
degree is a factory.
Degree 4
Conductive pollution that holds its conductivity due to conductive dust, rain or
snow. An example of an environment of this degree is the outdoors.
3.2.4 Installation of Brackets
z
If tie-down needed, please use the M4 screws which are located in the
front and back of this product. The screw must not enter by 30mm or
more in the product.
z
Refer to page7-1 “Outline Dimensions”.
Fig. 3-1 Screws for tie-down
Close-up
z This product can be used in environments with pollution degree 1
or 2.
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