thuba MS16 Manuel page 7

Manual PTB 20 ATEX 1012
Magnetic switches MS16 and small ther-
mostats ST16 must not be built into the walls
of flameproof enclosures.
4.1 Double insulation
The magnetic switch and small thermosat is dou-
bly insulated and does not have a connection for
a PE conductor.
4.2 Additional requirements
4.2.1 Enclosure
Connection of the connection lead of magnetic
switch MS16 and small thermostats ST16, shall
be made in an enclosure in a recognized type of
protection in accordance with IEC 60079-0 (for
example, in a connection box in the type of pro-
tection 'Increased Safety e'), for which an EU
Type Examination Certificate or IECEx has been
issued!
4.2.2 Equipotential bonding
The equipotential bonding shall be assured by
the mounting of the magnetic switch MS16 and
small thermostats ST16 onto the complete instal-
lation.
4.2.3 Installation of connection lead
The connection lead of the magnetic switch
MS16 and small thermostats ST16 shall be
installed permanently and in such a way that it is
protected against mechanical damage.
5. Maintenance
The valid provisions of IEC 60079-17 shall be
observed when carrying out inspection, ser-
vicing or maintenance work. During servic-
ing, it is particularly important to check those
components upon which the type of protec-
tion depends.
The explosionproof magnetic switch MS16
and small thermostats ST16 cannot be
repaired.
Edition January 2021
Copyright
thuba Ltd., CH-4002 Basel
Switzerland
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