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THREE-PHASE INDUCTION MOTORS WITH SQUIRREL-CAGE ROTOR FOR GENERAL INDUSTRIAL USAGE: AIR and 5A SERIES

TECHNICAL CHARACTERISTICS
  designationsstandardsdeviationdesign

Three-phase induction motors with squirrel-cage rotor include:

  • Motors of the main (basic) design;
  • Motors with the power capacities and mounting sizes of the CENELEK export standards;
  • Motors with uprated sliding action for mechanisms with pulsating loads, of great fly masses and for mechanisms with frequent start-ups.
DESIGNATIONS

The motors are marked as follows:

  • Series markings (AIR or 5A).
  • Sign of "extra-sliding" modification (S).
  • Dimensions (shaft height, mm).
  • Mounting dimension according to the length of frame (S,M,L).
  • Length of core with mounting sizes preserved (A,B).
  • Number of poles.
  • Sign of power capacity relative to mounting sizes according to the CENELEK standards (K).
  • Climatic design by the RF GOST 15150.
STANDARDS

Induction motors of AIR and 5A series for general industrial usage (basic design and its modifications) meet the following standards requirements:

NAMESTANDARDS of RFPUBLICATION IEC
Rotational electric motors.The data-sheet value and operating characteristics.GOST 28173IEC 34-1
Induction electric machines with power capacity of 1 to 400 kW. Motors. The main technical demands.GOST 28330 
Rotational electric machines. Nominal rates of power, voltage and frequencies.GOST 12139IEC 38
Rotational electric machines. Installation overall size.GOST 18709IEC 72
Rotational electric machines. Classification of protection degrees ensured by casings of rotational machines.GOST 17494IEC 34-5
Rotational electric machines. Ways of cooling. Markings.GOST 20459IEC 34-6
Rotational electric machines. Symbolic markings for construction forms according to ways of installation.GOST 2479IEC 34-7
Rotational electric machines. Markings of outlets and rotational direction.GOST 26772IEC 34-8
Rotational electric machines. Permissible noise level.GOST 16372IEC 34-9
Rotational electric machines. Built-in temperature protectionGOST 27895IEC 34-11
Rotational electric machines. Starting characteristics of one-speed three-phase induction motors with short-circuited rotor, voltage up to 660V.GOST 28327IEC 34-12
Rotational electric machines. Vibration permitted.GOST 20815IEC 34-14
Insulation system. Heat resistance assessment and classification..GOST 8865IEC 85
Electromagnetic compatibility of technical means. Induction motors, voltage up to 1000V. Norms and methods of testing resistance to electromagnetic interference.GOST 50034IEC 1000.2-1
up
DEVIATIONS

According to GOST 28173 (IEC 34-1) the nominal ratings of electric motors, presented in the database, may have some deviations, as listed below:

PARAMETRDVIATIONS PERMITTED
Efficiency, η 
machines with power up to 50kW inclusive-0,15 x (1-η)
machines with power more than 50kW-0,10 x (1-η)
Power factor, cos φ- (1 - cos φ)/6

min: -0,02
max: -0,07
Sliding, S 
machines with power up to 1kW±30% of guaranteed value
machines with power of 1kW and more±20% of guaranteed value
Initial starting current+20% of guaranteed value
Setting point (with rotor locked)from -15% to +25% of guaranteed value
Minimal rotational moment at starting-15% of guaranteed value
Maximum rotational moment-10% of guaranteed value, but no less then 1,5 of nominal moment
The dynamic moment of rotor inertia±10% of guaranteed value
DESIGN

Motors of 5A, AIR and 6A series are made in accordance with the way of installation, depending on the overall dimensions. The symbolism for the design meets GOST 2479 (IEC 34-7) requirements.

The initial figure - indicates the construction of the motor: 1-electric motor on feet with bearing shields;
2-electric motor on feet with bearing shields and a flange on a bearing shield.
3-electric motor without feet with bearing shields and a flange on a bearing shield.
5-electric motor without frame, bearing shields or shaft.
The second and third figures indicate the way of mounting of electric motor (see the table below).
The fourth figure indicates the design of motor shaft:
1-with one-cylindrical shaft end;
2-with two-cylindrical shaft ends (made to order to suit the customer's requirements).
Construction formMarkingApplication rage according to dimensionsConstruction formMarkingApplication rage according to dimensions
IM 1001 (IMB3)IM 1001 (IMB3)80-315IM1011 (IMV5)IM1011 (IMV5)80-250
IM 1031 (IMV6)IM 1031 (IMV6)80-250IM1051 (IMB6)IM1051 (IMB6)80-250
IM 1061 (IMB7)IM 1061 (IMB7)80-250IM1071 (IMB8)IM1071 (IMB8)80-250
IM 2001 (IMB35)IM 2001 (IMB35)80-315IM2011 (IMV15)IM2011 (IMV15)80-250
IM 2031 (IMB36)IM 2031 (IMB36)80-250IM2101 (IMV34)IM2101 (IMV34)80
IM 2111 (IMV15)IM 2111 (IMV15)80IM2131 (IMV36)IM2131 (IMV36)80
IM 3001 (IMB5)IM 3001 (IMB5)80-180IM3011 (IMV1)IM3011 (IMV1)80-250
IM 3031 (IMV3)IM 3031 (IMV3)80-250IM3601 (IMB14)IM3601 (IMB14)80
IM 3611 (IMV18)IM 3611 (IMV18)80IM3631 (IMV19)IM3631 (IMV19)80
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