KTR ROTEX GS - 5.7 Breakdowns, Causes and Elimination

KTR Kupplungstechnik
GmbH
D-48407 Rheine
ROTEX
®
GS
Operating/mounting instructions
KTR-N
Sheet:
Edition:
45510 EN
33of36
15
Please note protection
mark ISO 16016.
Drawn: 15.10.12 Pz Replaced for: KTR-N valid from 08.02.12
Verified: 29.10.12 Pz Replaced by:
5 Enclosure A
Hints and Instructions Regarding the Use in Hazardous Areas
5.6 Starting
The minimum distance “Sr” of the protection device of the rotating parts must be at leastthe values listed 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
covering
top surface side parts distance „Sr“
circular – max. diameter 4 8 ≥ 10
rectangular – max. side length 4 8 ≥ 10
Straight or bended slot –
max. side 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.
5.7
Breakdowns, Causes and Elimination
The below-mentioned errors can lead to an incorrect use of the ROTEX
®
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 arefallen below/exceeded.
• Components are exchanged by mistake/put together incorrectly.
• A wrong or no spider is inserted into the coupling.
• No original KTR parts (purchased parts) are used.
• Old/already worn out spiders or spiders stored too long are used.