PLS Drip-proof 3-phase induction motors - Etum Elektronik

PLS
Drip-proof 3-phase induction motors
General information
Tolerances for electromechanical characteristics
IEC 60034-1 specifies standard tolerances for electromechanical characteristics.
Parameters Tolerances
Efficiency
Cos ϕ
Slip
machines P ≤ 50 kW
machines P > 50 kW
machines P < 1 kW
machines P ≥ 1 kW
Locked rotor torque
Starting current
Run-up torque
Breakdown torque
Moment of inertia
Noise
⎧
⎨
⎩
⎧
⎨
⎩
A3 - Tolerance on main performance parameters
– 15% (1 – η)
– 10% (1 – η)
– 1/6 (1 – cos ϕ)
(min 0.02 - max 0.07)
± 30%
± 20%
– 15%, + 25% of rated torque
+ 20%
-15% of rated torque
-10% of rated torque
> 1.5 M
N
± 10%
+ 3 dB (A)
Vibration
+ 10% of the guaranteed class
Note: IEC 60034-1 does not specify tolerances for current
- the tolerance is ± 10% in NEMA-MG1
Tolerances and adjustments
The standard tolerances shown below are applicable to the drawing dimensions given in our
catalogues. They comply fully with the requirements of IEC standard 60072-1.
Characteristics Tolerances
Frame size H ≤ 250
≥ 280
Diameter ∅ of shaft extension:
- 32 to 48 mm
- 55 mm and over
0, — 0.5 mm
0, — 1 mm
Diameter N of flange spigot j6 up to FF 500,
js6 for FF 600 and over
Key width h9
Width of drive shaft keyway
N9
(normal keying)
Key depth
- square section
- rectangular section
➀ Eccentricity of shaft in flanged motors (standard class)
- diameter > 30 up to 50 mm
- diameter > 50 up to 80 mm
- diameter > 80 up to 120 mm
➁ Concentricity of spigot diameter and
➂ perpendicularity of mating surface of flange in relation to shaft
(standard class)
Flange (FF):
- FF 300 to FF 500
- FF 600 to FF 740
- FF 940 to FF 1080
k6
m6
h9
h11
0.050 mm
0.060 mm
0.070 mm
0.125 mm
0.16 mm
0.20 mm
E/2
➀ Eccentricity
of shaft in flanged motors
10
10
➁ Concentricity of spigot
diameter
➂ Perpendicularity of mating surface of
flange in relation to shaft
11