Weir Warman 650 M200-MCR-G, Manual, Page: 177 / 287

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BA 5010 EN 03.10
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"X"
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Fig. 39: Design of the gear unit with main and auxiliary drives
1 Main gear unit 4 Drive shaft 6 Overrunning clutch
2 Auxiliary gear unit of main gear unit 7 Pulse generator for speed
3 Intermediate flange 5 Backstop monitoring
The speed­monitoring device must be connected in such a manner that the main drive is disabled
automatically at
"> Zero" speed at the output shaft of the auxiliary drive. For safety reasons, the disabling
function must be checked at regular intervals, i.e. at least quarterly. To check the disabling function, the
auxiliary drive is switched on. If the speed­monitoring device connects ­ which can be verified, for instance,
by means of a warning light ­ the speed­monitoring device is ready for operation.
This speed­monitoring device is an absolute must for safety reasons since in
case of a defect in the overrunning system the auxiliary drive can be destroyed
with explosive effect due to overspeeds.
5.16.2 Auxiliary drive, designed as a load drive
Unlike the maintenance drive, type KF and KZ bevel­helical MOTOX gear units are used here for the
auxiliary drive. The motors of the auxiliary drives are dimensioned in such a manner that a properly loaded
conveyor system can be operated at low speed in the same direction of rotation.
Furthermore the conditions set out in item 5.16.1 are applicable.