SIEMENS
4/5
Siemens MD 50.8 · 2017
Motors
Orientation
Technical specifications
4
■
Efficiency and power factor
The efficiency
and power factor cos
for each rated power are
listed in the selection tables in the individual sections of this
catalog.
For motors with Standard Efficiency (IE1), High Efficiency (IE2)
and Premium Efficiency (IE3), the 3/4 load efficiency is also
listed in the selection tables. The part-load values stated in the
tables below are averages; precise values can be provided on
request.
Partial-load power factor cos
Partial-load efficiency
in %
■
EMC measures
SIMOGEAR geared motors are designed as components for
installation in systems and machines. The manufacturer of the
system or machine is responsible for complying with
EMC Directive 2004/108/EC.
LA and LE motors, when correctly used in continuous operation
connected to the line supply, fulfill basic EMC standards
EN 50081 and EN 50082.
4/4
of full load
1/4
1/2
3/4
5/4
0.92
0.70
0.86
0.90
0.92
0.91
0.65
0.85
0.89
0.91
0.90
0.63
0.83
0.88
0.90
0.89
0.61
0.80
0.86
0.89
0.88
0.57
0.78
0.85
0.88
0.87
0.53
0.76
0.84
0.87
0.86
0.51
0.75
0.83
0.86
0.85
0.49
0.73
0.81
0.86
0.84
0.47
0.71
0.80
0.85
0.83
0.45
0.69
0.79
0.84
0.82
0.43
0.67
0.77
0.83
0.81
0.41
0.66
0.76
0.82
0.80
0.40
0.65
0.75
0.81
0.79
0.38
0.63
0.74
0.80
0.78
0.36
0.61
0.72
0.80
0.77
0.34
0.59
0.71
0.79
0.76
0.32
0.58
0.70
0.78
0.75
0.30
0.56
0.69
0.78
0.74
0.29
0.55
0.68
0.77
0.73
0.28
0.54
0.67
0.77
0.72
0.27
0.52
0.63
0.76
0.71
0.26
0.50
0.62
0.76
4/4
of full load
1/4
1/2
3/4
5/4
97
93
96.0
97.0
96.5
96
92
95.0
96.0
95.5
95
90
93.5
95.0
94.5
94
89
92.5
94.0
93.5
93
88
91.5
93.0
92.5
92
87
91.0
92.0
91.5
91
86
90.0
91.0
90.0
90
85
89.0
90.0
89.0
89
84
88.0
89.0
88.0
88
80
87.0
88.0
87.0
87
79
86.0
87.0
86.0
86
78
85.0
86.0
85.0
85
76
84.0
85.0
83.5
84
74
83.0
84.0
82.5
83
72
82.0
83.0
81.5
82
70
81.0
82.0
80.5
81
68
80.0
81.0
79.5
80
66
79.0
80.0
78.5
79
64
77.0
79.5
77.5
78
62
75.5
78.5
76.5
77
60
74.0
77.5
75.0
76
58
73.0
76.0
74.0
75
56
72.0
75.0
73.0
74
55
71.0
74.0
72.0
73
54
70.0
73.0
71.0
72
53
68.0
72.0
70.0
71
52
67.0
71.0
69.0
70
51
66.0
70.0
68.0
69
50
65.0
69.0
67.0
68
49
64.0
67.5
66.0
67
48
62.0
66.5
65.0
66
47
61.0
65.0
64.0
65
46
60.0
64.0
63.0
64
45
59.0
63.0
62.0
63
44
57.0
62.0
61.0
62
43
56.0
60.5
60.5
61
42
55.0
59.5
59.5
60
41
54.0
58.5
58.5
© Siemens AG 2017