SIEMENS
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Siemens MD 50.1 · 2015
General options
Designs for special environmental conditions
12
■
Increased protection against humidity and tropical climates
Increased protection against humidity and tropical climates can
be optionally supplied for the (geared) motors, sizes 63 to 200.
This design is suitable for air humidity in the range between
30 and 60 g water per m³ air as a function of the temperature
(
see page 9/7
).
The increased protection against humidity and tropical climates
includes surface treatment with corrosivity category C2 (
L03
),
increased winding protection against moisture and acid (
N54
),
internal motor corrosion protection (
N41
) and temperature
class (155) F.
Please contact Siemens, if the motor requires other functions
(brake, backstop, encoder systems).
■
Increased protection against acids and alkalis
Increased protection against acids and alkalis can be optionally
supplied for the (geared) motors, sizes 63 to 200. This design is
suitable for city and industrial atmospheres with moderate pollu-
tion as a result of sulfur dioxide, coastal areas with low salt levels
and aggressive atmospheres up to 1% acid or alkali
concentration.
The increased protection against acids and alkalis includes sur-
face treatment with corrosivity category C3 (
L04
), increased
winding protection against moisture and acid (
N54
), internal mo-
tor corrosion protection (
N41
) and temperature class (155) F.
Please contact Siemens, if the motor requires other functions
(brake, backstop, encoder systems).
■
Extreme ambient temperatures
The ambient temperature range for products listed in the catalog
extends from -10 to +40 °C. In addition, when using the recom-
mended oils, drives can be selected for the range extending
from -20 to +40 °C.
When appropriately modified, SIMOGEAR geared motors can
be operated at temperatures extending from -40 to -20 °C.
After specifying the temperature range, the operating and start-
ing mode as well as the load, we will gladly offer this design.
Technical changes especially involve the electrical components
as well as the selection of lubricants and seals.
At higher ambient temperatures above +40 °C, the permissible
oil sump temperature must not be exceeded. Please contact
Siemens if your drive has to be thermally checked.
In addition, at higher temperatures, a special motor design is
required, which we will be glad to offer.
Order code:
Increased protection against humidity and
tropical climates
N43
Order code:
Increased protection against acids and
alkalis
N44
© Siemens AG 2015