Operating Instructions MxxMA-MxERA Three-phase AC ... - Lenze
Operating Instructions MxxMA-MxERA Three-phase AC ... - Lenze
Operating Instructions MxxMA-MxERA Three-phase AC ... - Lenze
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8<br />
Maintenance/repair<br />
Maintenance operations<br />
Motor<br />
8.3 Maintenance operations<br />
8.3.1 Motor<br />
Stop!<br />
ƒ Make sure that no foreign bodies can enter the inside of the motor!<br />
ƒ Only work on the drive system when it is in a deenergised state!<br />
ƒ Do not remove plugs when voltage is being applied!<br />
ƒ Hot motor surfaces up to 140 °C. Observe cooling times!<br />
ƒ Remove loads acting on motors or secure loads acting on the drive!<br />
8.3.2 Spring−operated brakes<br />
The brake is mounted to the N−end shield of the motor. Remove the fan cover or blower<br />
unit to check, maintain, or set the brake.<br />
Note!<br />
Brakes with defective armature plates, cheese head screws, springs or counter<br />
friction faces must always be replaced completely.<br />
Generally observe the following for inspections and maintenance works:<br />
ƒ Remove oil and grease linked impurities using brake cleaning agents, if<br />
necessary, replace brake after identifying the cause of the contamination.<br />
Dirt deposits in the air gap between stator and armature plate impair the<br />
function of the brake and must be removed.<br />
ƒ After replacing the rotor, the original braking torque will not be reached<br />
until the run−in operation of the friction surfaces has been completed. After<br />
replacing the rotor, run−in armature plates and counter friction faces have<br />
an increased initial rate of wear.<br />
46 <br />
BA 33.0005−EN 2.0
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