7
Inspection and maintenance
07.2020
89
ba
-o
.2
.6
.0
-us
-3
.2
-ys
|
A1
18
67
50
1 Re
v A
E
7.3
Motors
DANGER
Electric shock hazard
. Some motor parts are live. Any contact with live parts can cause
severe injury or death. Motors have dangerous rotating parts and hot surfaces.
Ensure that:
•
the motor runs correctly (e.g. no variations in speed, no noise emission),
•
there are no strong vibrations.
The insulation resistance must be checked after a long period of storage or shutdown, if
possible at a winding temperature of +68
°F … +86
°F. Before starting to measure the
insulation resistance, pay attention to the operating instructions of the insulation
measurement instrument being used.
Measuring voltage: 500 V.
Minimum insulation resistance for new, cleaned or overhauled windings: 10
MΩ.
Critical specific insulation resistance after a long period of operation: 0.5
MΩ / kV.
If the critical insulation resistance is reached or undershot, the windings must be dried, or
thoroughly cleaned and dried after removing the rotor.
7.4
Gears
(1)
Screw plug
(2)
Bleeder screw
Before commissioning, the screw plug (1) used for transport must be replaced by the
bleeder screw (2) provided if necessary.
Small quantities of oil may leak out of the bleeder screw.