Siemens SIMOTICS DC 1GH5 Operating And Installation Instructions page 79

Dc motor

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Rotating or live parts

Rotating or live parts are dangerous. Death, serious injury, or material damage can result if

the required covers are removed.

Depending on the design, the motor may have inspection windows for monitoring the

commutation behavior or covers. If there are no inspection windows, only qualified personnel

is permitted to remove the covers. This ensures that there is no contact with live or moving

parts. Wear safety goggles when working.

Checking the motor when in operation

The following must be checked during the first and any subsequent inspections:

● The relevant technical data are observed: power consumption, temperature of windings,

● There should be no oil, grease, or water leakages.

● The smooth running characteristics and motor running noise have not deteriorated.

● No impermissible brush sparking occurs in operation.

Checking during idle time

Once the machine has been shut down, check that:

● The motor foundation has no indentations or cracks.

● The carbon brushes and commutators are in perfect condition. Commutator surfaces have

● The brush holders are correctly aligned and mounted.

● Carbon brushes can move freely in the brush guides, and their pressure fingers can move

● There is sufficient brush height remaining to allow fault-free operation until the next

● Any defects discovered during checking should be fully corrected.

Note

The inspection measures may be required depending on the plant specification and operating

conditions.

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