3-phase TEFV induction motors ATEX GAS - Zones 1 & 2

12
3-phase TEFV induction motors
ATEX GAS - Zones 1 & 2
General information
Tolerances on electromechanical characteristics
IEC 60034-1 specifies standard tolerances for electromechanical characteristics.
Parameters Tolerances
Efficiency machines P ≤ 150 kW
{ machines P > 150 kW
– 15% (1 – η)
– 10% (1 – η)
Cos ϕ – 1/6 (1 – cos ϕ)
(min 0.02 - max 0.07)
Slip machines P < 1 kW
{ machines P ≥ 1 kW
± 30%
± 20%
Locked rotor torque – 15%, + 25% of rated torque
Starting current + 20%
Run-up torque – 15% of rated torque
Maximum torque – 10% of rated torque
> 1.6 MN Moment of inertia ± 10%
Noise + 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 mechanical characteristics given in
our catalogues. They comply fully with the requirements of IEC standard 60072-1.
Characteristics Tolerances
Frame size H ≤ 250
≥ 280
Diameter ∅ of the shaft extension:
- 11 to 28 mm
- 32 to 48 mm
- 55 mm and over
0, — 0.5 mm
0, — 1 mm
Diameter N of flange spigots j6 up to FF 500,
js6 for FF 600 and over
Key width h9
Width of drive shaft keyway
(normal keying)
N9
Key depth:
- square section
- rectangular section
A3 - Tolerance on main performance parameters
jEccentricity of shaft in flanged motors
flanged (standard class)
- diameter > 10 up to 18 mm
- diameter > 18 up to 30 mm
- diameter > 30 up to 50 mm
- diameter > 50 up to 80 mm
- diameter > 80 up to 120 mm
kConcentricity of spigot diameter and
lperpendicularity of mating surface of flange in relation to shaft
(standard class)
Flange (FF) or Faceplate (FT):
- F 55 to F 115
- F 130 to F 265
- FF 300 to FF 500
- FF 600 to FF 740
- FF 940 to FF 1080
j6
k6
m6
h9
h11
0.035 mm
0.040 mm
0.050 mm
0.060 mm
0.070 mm
0.08 mm
0.10 mm
0.125 mm
0.16 mm
0.20 mm
E/2
j Eccentricity of shaft in flanged motors
k Concentricity of spigot diameter
10
l Perpendicularity of mating surface of
flange in relation to shaft
10