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Cooling for machines with surface cooling, hollow rib cooling or tube cooling
For machines with rib, hollow rib or tube cooling, the cooling air is drawn in through openings
in the fan cover. The air is blown over the surface or through the cooling tubes of the stator
frame. With hollow-fin or tube cooling, a closed cooling air circuit inside the motor assists with
heat dissipation.
Stator winding
The stator winding has a temperature class according to EN 60034-1, see rating plate. High-
quality enameled wires, suitable surface insulating materials, and the type of impregnation
guarantee great mechanical and electrical stability together with a high utility value and a long
service life.
Rotor
The rotor has a squirrel cage rotor manufactured out of die-cast aluminum or a brazed copper
rotor. The rotor is dynamically balanced. The balance condition is stated on the shaft end face
or rating plate.
Bearings
The motors are equipped with grease-lubricated roller bearings.
● The bearings of the standard version motors (up to size 280) are permanently lubricated.
● The bearings of motors from size 315 upwards have a relubrication facility and automatic
Terminal boxes
In the motor terminal box, additional connecting terminals are available if required for
monitoring equipment. For larger machines, an additional terminal box can be optionally
mounted. You can see the number of available terminals in the circuit diagrams.
Paint finish
The machine is painted according to the instructions in your order.
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
grease quantity control.
Description
25
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