Tolerances – Electrical parameters

As specified by DIN EN 60034-1/02.99 the following tolerances are permissible:

Efficiency (indirect calculation)-0.15 (1- η ) at P N ≤ 50 kW-0.1 (1- η ) at P N >50 kWPower factor1-cos Ï• min. 0.026 max. 0.07Slip±20 % P N ≥ 1 kW(at rated load and operating temperature)±30 % P N <1 kWStarting current+ 20 %(in the planned starting circuit)no restriction downwardsStarting torque-15 % and +25 %Pull-up torque-15 %Pull-out torque-10 % (with the application of this tolerance M K /M at least 1.6)Moment of inertia±10 %Noise level (sound pressure level)+3 dB (A)

These tolerances are permissible for the values assured forthree-phase asynchronous motors, taking the necessary manufacturing tolerances and materials variations of the raw materials used into account. The standard contains the follo- wing notes on this:1.A guarantee for all or any of the values shown in the table is not mandatory. In tender the guaranteed value for which permissible deviations should apply must be expressly specified. The permissible variations must correspond to those stated in the table.2."Guarantee": In some countries, a distinction is drawn bet-ween guaranteed values and typical or declared values. 3.If a permissible deviation only applies in one direction, then the value in the other direction is not limited.

Tolerances – Mechanical parameters

Dimensional short sign

Meaning of dimensionsFit or tolerance

acc. to DIN 42939

aSpacing of feet fixing holes in axial direction±1 mma
1 Diameter or width across corners of attachment flange±1 mmbSpacing of feet fixing holes across axial direction±1 mmb
1 Diameter of flange spigotup to diameter 230 mm j6from diameter 250 mm h6d, d
1 Diameter of shaft end (cylindrical)up to diameter 48 mm k6from diameter 55 mm m6e
1 Pitch circle diameter of attachment flange±0.8 mmf, gLargest width of motor (without terminal case)+ 2 %hShaft height (lower edge foot to centre of shaft)up to 250 mm -0,5from 250 mm -1k, k
1 Overall length of motor+ 1 %l ≤ shaft end 55 mm- 0.3 mm ≥ shaft end 60 mm- 0.5 mmpOverall height (lower edge foot,+ 2 %housing or flange to highest point of motor)s, s
1 Diameter of fixing holes of foot or flange + 3 %t, t
1 Lower edge of shaft end to upper edge key+ 0.2 mmu, u
1 Width of keyh9w
1 , w
2 Centre of first attachment hole to shaft end shoulder±3.0 mm Distance shaft shoulder – flange face, fix. supplier of bearing D-end ±0.5 mmDistance shaft shoulder – flange face±3.0 mmMotor weight- 5 up to +10 %
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