DC motor - Siemens, s.r.o.

6.3 Repair
Maintenance
•= no leaks occur (oil, grease, water).
•= the smooth running characteristics and bearing noise of the motor have not
deteriorated.
•= no unpermissible brush sparking occurs during operation.
check, while the motor is at standstill, that:
•= the motor foundation has no indentations or cracks.
•= the carbon brushes and the commutator are in perfect condition and the
commutator contact surfaces have a uniform skin.
•= the brush holders are correctly aligned and secured.
•= the carbon brushes in the brush boxes and the brush pressure fingers move
easily and the spring action of all carbon brushes is even.
•= the remaining brush height is still sufficient to ensure uninterrupted operation up
until the next inspection. Make sure the height does not drop below the
minimum brush height.
•= the motor is aligned within the permissible tolerance ranges.
•= all the fixing screws for the mechanical and electrical connections are tight .
•= the winding insulation resistances are sufficiently high.
•= any bearing insulation is not short-circuited (if present, according to details on
plate).
•= cables and insulating parts and components, where accessible, are in good
condition and are not discolored.
Any defects detected in the course of the inspection must be corrected
immediately.
Note
The range of servicing measures to be performed may increase depending on the
plant specification and operating conditions.
[ID 580]
6.3.1 Safety information
Instructions relevant for safety
SIEMENS AG T61160347010001 (DMHO V9)
Operating instructions 1GG6286-0NA4.-1VV1-Z 6-11