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Siemens MD 50.8 · 2017
Motor options
Electrical design
Windings and insulation
6
■
DURIGNIT IR 2000 insulation
The DURIGNIT IR 2000 insulating system consists of high-
quality enamel wires and insulating sheet materials in conjunc-
tion with temperature-resistant resin impregnation.
This ensures that these motors will have a high mechanical and
electrical strength, high service value, and a long service life.
The insulating system protects the winding to a large degree
against aggressive gases, vapors, dust, oil, and increased air
humidity. It can withstand the usual vibration stressing.
■
Temperature class
All motors are designed for temperature class 155 (F). They are
utilized to temperature class 130 (B).
The 4-pole motors can be optionally implemented for tempera-
ture class 180 (H). The winding is utilized to temperature
class 155 (F).
■
Increased air humidity/temperature with 30 to 60 g water
per m³ of air
The motors in the standard range are designed for up to 30 g
water per m
3
. A design for increased air humidity in the range
between 30 and 60 g water per m
3
air as a function of the
temperature is possible, as shown in the following table.
Order code:
Temperature class 180 (H)
M08
Order code:
Increased air humidity/temperature
with 30 to 60 g water per m³ of air
N54
Relative
humidity
Temperature
+20 °C
+30 °C
+40 °C
+50 °C
+60 °C
+70 °C
+80 °C
10 %
2
3
5
8
13
20
29
15 %
3
5
8
12
19
30
44
20 %
3
6
10
17
26
39
58
25 %
4
8
13
21
32
49
30 %
5
9
15
25
39
59
35 %
6
11
18
29
45
40 %
7
12
20
33
52
45 %
8
14
23
38
58
50 %
9
15
26
41
55 %
10
17
28
46
60 %
10
19
31
50
65 %
11
20
33
54
70 %
12
21
36
58
75 %
13
23
38
80 %
14
24
41
85 %
15
26
43
90 %
16
27
46
95 %
16
29
49
100 %
17
30
51
© Siemens AG 2017