Change of rotational direction:
For DOL (direct on–line) starting and in pole–changing motors with separate windings the di-
rection of rotation can be reversed by exchanging two mains conductors on the terminal board
of the motor.
For motors with star/delta starting and pole–changing motors with Dahlander winding, 2 (two)
mains conductors at the input to the motor switch have to be exchanged.
For a machine with one shaft end only or with two shaft ends of different diameters, that rota-
tional direction of the rotor is considered as the direction of rotation, being noticed by anybody
when looking at the front end or thicker shaft end.
With forced ventilation the direction of rotation is separately marked by an arrow on the forced
ventilation itself.
Check before commissioning
– Check whether the bearing lock has been removed!
See Paragraph 3.2 ”Bearing lock”!
– Observe data on the rating plate!
– Check whether voltage and frequency of the motor comply with the mains data!
– Check whether the rotational direction is correct and for inverter operation, that the
limit speed is not exceeded!
– Check whether the motor is protected as specified in the regulations!
– Check and make sure that in case of star/delta–starting, because of the risk of
inadmissible operational loads, the switching from star to delta can only be
executed after fading of starting current of the star step!
– Check whether the electrical connections are securely tightened and whether the
monitoring devices are correctly connected and adjusted!
– Check coolant temperature!
– Check whether the additional equipment – if any – is functioning.
– In case of water–cooled motors, check whether the cooling water circuit is in operation!
– Check whether the cooling air inlet openings and cooling surfaces are clean!
– Check whether protective measures have been taken: earthing!
– Check whether the motor is securely fixed!
– In case of a belt drive, check the belt tension!
– Check whether the cover of the terminal box is closed and whether the cable
entries are properly sealed.
– For forced–ventilated motors it is to be checked, whether the forced ventilation is
functioning and in operation when the main motor is in operation.
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CHM - SERIES Maintenance and Sparepartlist
Installation ans commissioning
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C - SERIE BESTRIEBE- UND wARTUNGSANLEITUNG
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C - SERIE BESTRIEBE- UND wARTUNGSANLEITUNG
CHM - SERIES Maintenance and Sparepartlist
Stöwer Antriebstechnik GmbH, Enneststrasse 3, 51702 Bergneustadt, Tel. 02261-40970, Fax: 41309, www.stoewer-getriebe.de