KTR Kupplungstechnik
GmbH
D-48407 Rheine
RADEX
®
-NC
Operating-/Assembly instructions
KTR-N
sheet:
edition:
47210 EN
15 of18
6
Schutzvermerk
ISO 16016 beachten.
Gezeichnet:
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Ersatz für:
KTR-N vom 26.03.09
Geprüft:
23.05.12 Kb
Ersetzt durch:
5 Enclosure A
Hints and instructions regarding the use in
hazardous areas
5.7 Starting
For covers with unlocked openings on the upper side no light metals may be used if the couplings are used as
appliances of appliance group ll (if possible, from stainless steel).
If the couplings are used in mining (appliance group l M2), the cover must not be made from light metal. In
addition, it must be resistant to higher mechanical loads than if it is used as appliance of appliance group ll.
The minimum distance “Sr” between the protection device and the rotating parts must at least correspond to the
figures mentioned below.
If the protection device is used as cover, regular openings complying with the explosion protection demands can
be made that must not exceed the following dimensions:
Openings
Cover [mm]
Top side
Lateral parts
Distance “Sr”
Circular – max. diameter
4
8
≥
10
Rectangular – max. lateral length
4
8
≥
10
Straight or curved slot –
max. lateral length/height
prohibited
8
≥
20
!
C A U T I O N !
If you note any irregularities at the coupling during operation, the drive unit must be turned
off immediately. The cause of the breakdown must be found out with the table
„Breakdowns“ and, if possible, be eliminated according to the proposals. The possible
breakdowns mentioned can be hints only. To find out the cause all operating factors and
machine components must be considered.
Coupling layer:
If coated (priming, painting etc.) couplings are used in hazardous areas, the requirements to
conductability and layer thickness must be considered. In case of paintings up to 200 µm no
electrostatic load can be expected. Multiple coatings that are thicker than 200 µm are prohibited
for explosion group llC.
5.8 Breakdowns, Causes and Elimination
The below-mentioned errors can lead to an incorrect use of the RADEX
®
-NC coupling. In addition to the
stipulations in these operating and mounting instructions please make sure to avoid these errors.
The errors listed can only be clues to search for the errors. When searching for the error the adjacent
components must be generally included.
Due to incorrect use the coupling can become a source of ignition.
EC Standard 94/9/EC requires a special care from the manufacturer and the user.
General errors incorrect use:
•
Important data for the coupling selection was not forwarded.
•
The calculation of the shaft/hub connection was not considered.
•
Coupling parts with damage occurred during transport are assembled.
•
If the heated hubs are assembled, the permissible temperature is exceeded.
•
The fits of the parts to be assembled are not coordinated with each other.
•
Tightening torques are below/exceeded.
•
Components are exchanged by mistake/put together incorrectly.
•
A wrong or no laminae package is inserted into the coupling.
