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Tolerances
Electromechanical Characteristics
The table below, describes the electromechanical tolerances concerning electric motors, according to the IEC 34-1 standard (EN 60034-1).
Tolerance
Parameter
■ 0.15 (1 - ti)
Rated power s50 kW
Efficiency
■ (1 - cos (p) / 6
min 0,02 - max 0,07
Power Factor
cosp
±30% ±20% +20% ±10%
Rated power <1kW Rated power alkW
Slip
Locked Rotor Current
of the guarateed value
Moment of Inertia
- 15% +25%
of the guarateed value
of the guarateed value (Upon request it is possibile to exceed the +25% value)
Locked Rotor Torque
Mechanical tolerances
The table below describes the mechanical tolerances concerning electric motors, according to the standard IEC 72.
Dimension
Tolerance
Shaft Height
- 0,5 mm
Flange Spigot
I. h6
for motors up to 132 frame size
for motors of 160 frame size and above
Shaft end Diameter
(~ j6 k6
m6
0 from 39 mm up to 28 mm 0 from 38 mm up to 48 mm 0 from 55 mm up to 60 mm
Standard and special flange
The table below shows the dimension of the standard and special flange and shaft sorted by frame size.
N
P
P
Motor frame size
Shaft drive end dimension (DxE) (mm)
Flange type
Flange dimension (P/M/N) (mm)
BM 56
9x20
B5 (standard)
120/100/80
BM 56
C 9x20
B14 (standard)
80/65/50
BM 63
C 11x23
B5 (standard)
140/115/95
BM 63
C 11x23
B14 (standard)
90/75/60
BM 63
11x23
B14-R (56)
(80) 90/65/50 ***
BA 71
C 14x30
B5 (standard)
160/130/110
BA 71
C 14x30
B5-R (56)*
120/100/80
BA 71
14x30
B5-R/M (63)*
140/115/95
BA 71
14x30
B5-M
200/165/130
BA 71
14x30
B14 (standard)
105/85/70
BA 71
14x30
B14-R
(90) 105/75/60 ***
BA 80
19x40
B5(standard)
200/165/130
BA 80
19x40
B5-R
160/130/110
BA 80
19x40
B14
120/100/80
BA 80
19x40
B14-R
(105) 120/85/70 ***
BA 90
C 24x50
B5(standard)
200/165/130
BA 90
C 24x50
B5-R
160/130/110
BA 90
24x50
B14(standard)
140/115/95
BA 90
24x50
B14-R
(120) 140/100/80 ***
BA 100
C 28x60
B5(standard)
250/215/180
BA 100
C 28x60
B5-R **
200/165/130
BA 100
28x60
B14(standard)
160/130/110
BA 112
28x60
B5 (standard)
250/215/180
BA 112
28x60
B14(standard)
160/130/110
BA 132
38x80
B5(standard)
300/265/230
BA 132
38x80
B5-R
250/215/180
BA 132
38x80
B14(standard)
200/165/130
BA 160
42x110
B5(standard)
350/300/250
BA 180
48x110
B5(standard)
350/300/250
BA 200
55x110
B5(standard)
400/350/300
BA 225
C 60x140 (4/6/8 Poles)
B5(standard)
450/400/350
BA 225
C 55x110 (2 Poles)
B5(standard)
450/400/350
Notes: *
This type of flange requires a special shaft therefore it isn't interchangeable with the standard flanges. This flange increases the motor length (Q) by 25mm. This type of flange requires a non standard industrial bearing while the shaft remains the standard one.
The difference between the dimension of the reduced flange and the standard one (in brackets) doesn't affect the correct motor assembly.
9
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