Emotron EMX-B, Instruction Manual

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46 Maintenance
CG Drives & Automation 01-6048-01r3
5. Maintenance
The motor and the controller do not normally require any maintenance. There
are however some things which we recommend to be checked regularly.
• Check external wiring, connections and control signals.
• Check power and motor cable connections
Preventive maintenance can optimise the product life time and secure trouble
free operation without interruptions.
For more information on maintenance, please contact your CG Drives &
Automation service partner.
5.1 Motor diagnosis
• Disconnect the supply voltage.
• Disconnect the motor cables from the control unit.
Measure the motor resistance between R–Y, Y–B and B–R. The values should
be approximately 140 Ohm for EMX-B15, approximately 40 Ohm for
EMX-B25 and approximately 28 Ohm for EMX-B35. The resistance should
not differ by more than 10 Ohm between the phases. Also check the insulation
resistance between R, Y, B terminals shorted and the motor body to ensure that
there is no short circuit to PE.
WARNING! Residual voltage remains for up to 5 minutes after
disconnection of the supply voltage. The test switch and the DIP
switches may only be adjusted when the supply voltage has
been disconnected.
NOTE: When checking the insulation resistance, it is important to turn the
motor shaft slowly (at least one complete turn) in order to get a correct
measurement.