Instructions for ensuring explosion protection during operation
• All of the contact screws and nuts of the electrical connections are to be tightened securely to prevent excessively
high contact resistance values that may lead to an excessive degree of overheating of the contact point; torque
values.
• Use the utmost caution when connecting the mains cable. Observe the creep distances and clearances. Use duly
the sealing parts of the cable lead-ins and connections spaces as well as the lead-in parts envisaged for the pull
relief or as protection against torsion in order to maintain the degree of protection of the connection spaces.
• Eliminate any damages immediately and use only original spare parts. The proper performance of the works by the
aforementioned sites is to be examined as per the relevant EC directives, in Germany by a qualified expert as per
ElexV, abroad as per the relevant national regulations in force and to be confirmed by means of an appropriate
marking on the motor or by issuing a test report.
• The surfaces of ignition-protected gaps must not be reworked. Keep these surfaces metallically clean. Corrosion
protection can be achieved by means of non-hardening sealing materials or sealing grease. The approved sealing
materials include besides the corrosion protection greases available on the market: Hylomar, by Marston-Domsel
or Admosit and Fluid-D, by Teroson (follow the manufacturer's usage instructions). This must be observed in par-
ticular for the openings in the cover for connection spaces having a pressure-resistant encapsulation degree of
protection, marking EEx d IIC(B).
•
All the screws are to be tightened to the envisaged torque and just as many screws as necessary for the envisaged
fastening boreholes are provided. Any damaged screws are to be replaced only with screws of the same dimen-
sions and quality.
Repairs
Repairs and changes to explosion-protected machines are to be carried out by one of the aforementioned sites as
per EC directives 94/9/EC and 99/92/EC, in Germany in compliance with the Operational Safety Order as well as
with the safety regulations and requirements of the repair instructions.
Any works relating to the explosion protection must be carried out by the manufacturer or by a specialized workshop
for electrical machinery. If said works are not performed by the manufacturer, these must be surveyed by an author-
ized qualified person.
In Germany a written certificate as per the Operational Safety Order is required for restarting. In foreign countries the
national regulations in force are to be complied with.
3 Additional dust protection requirements
(application in zones 21 and 22)
Intended use
A marking of at least IP 65 and
II 2D T …° C must be found on the motor's rating plate.
Installation and Operation
Cable and line lead-ins
Separately approved lead-ins belonging to category 2G with at least IP 65 or category are to be used. Any openings
that are not used are to be closed with duly approved plugs.
Operation and Repairs
The motors must not be operated with excessive dust deposits, as these may lead to the exceeding of the admissi-
ble surface temperature. Regular cleaning must be performed.
The radial shaft seal rings are included in the approval. Only original gaskets are to be used.
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