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Description
See also
Quality documents (Page 115)
The following standards additionally apply for explosion-proof motors:
Table 3-5
Feature
Type of protection Ex t
①
Additionally, the following standards apply to these explosion-protected machines:
Table 3-6
Characteristic
Type of protection Ex d
Rating plate
The rating plate shows the identification data and the most important technical data. The data
on the rating plate and the contractual agreements define the limits of proper usage.
Motor enclosure with surface, hollow-rib or tube cooling
Depending on their size, the stator frame and bearing shields are manufactured out of cast
iron or steel. The fan cover is made of sheet steel. The stator frame surface has cooling ribs,
hollow ribs, or tubes and mounted terminal box.
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.
24
Machine design with type of protection Ex t
①
Optional (depending on order)
Machine version with type of explosion protection Ex d
Standard
IEC / EN 60079-0
IEC / EN 60079-31
Standard
IEC / EN 60079‑0
IEC / EN 60079‑1
SIMOTICS XP 1MD4/1MD5
Operating Instructions 05/2015
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