© Munters AB, 2013
20
fig. 9
Equipotential earthing wiring safeguard
To create effective protection against the risk of electrocution, the outer protection conductor must be connected to
terminal PE inside an electrical panel.
For correct sizing of the protection conductors, see following requirements as indicated in standard IEC EN 60204-1:
•
phase conductor up to 16 mm
2
: section of the protection conductor equal to the section of the supply
conductor;
•
phase conductor between 16 and 35 mm
2
: section of protection conductor equal to 16 mm
2
;
•
phase conductor over 35 mm
2
: section of protection conductor equal to at least half the section of the
supply conductor.
Protection against contact voltages
The choice of device to protect the electrical system must be made in such a way as to ensure the safe intervention
of the main automatic switches and any differential devices linked to them. For an appropriate choice of the
type of protection for the machine’s supply line, taking into account whether the distribution system is TT or TN,
it is advisable to consult an electrical systems designer, in order to ensure compliance with the requirements of
standard IEC 64-8 or the equivalent provisions in the country where the machine is being installed.
5.4 Tests and checks before startup
Before startup, it is extremely important to carry out a very careful check of the fan, in order to prevent malfunctions
and/or accidents.
In particular, perform the following operations:
1. Equipotential earthing wiring safeguard:
•
check the fan visually, verifying that there are no particular mechanical irregularities or foreign bodies inside
the structure;
•
check that the protective structures (fixed guards made of metal mesh) are correctly positioned and fixed;
When connecting all the metal masses to the earth system, check that there are
no insulating elements between the various conductive masses (metal parts). The
system must not be put into operation unless the equipotentiality of the masses
and the connection to the earth system have previously been checked.
WArNINg
Installation
Chapter5
