JB/T 7119-1993 Technical requirements for YR series (IP44) three-phase asynchronous motors (frame sizes 132 to 315)
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T7119-1993
Technical conditions for YR series (IP44) three-phase asynchronous motors (frame size 132~315)
Published on October 8, 1993
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Technical conditions for YR series (IP44) three-phase asynchronous motors (frame size 132~315)
1 Subject content and scope of application
JB/T7119-1993bzxZ.net
This standard specifies the types, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking and packaging and warranty period requirements of YR series motors.
This standard applies to YR series (IP44) three-phase asynchronous motors (frame size 132~315) (hereinafter referred to as motors), and all series of motors derived from this series of motors can also refer to it. 2
Referenced standards
Basic technical requirements for rotating motors
GB1993
Motor housing protection classification
Motor cooling method
Motor structure and installation type code
GB10069
GB10068
GB1032
Motor size tolerance
Rotating motor noise measurement method and limit
Rotating motor vibration measurement method and limit
Three-phase asynchronous motor test method
Packaging, storage and transportation diagrams and signs
GB12665
JB/Z294
JB/Z346
Requirements for damp heat test of motors under normal environmental conditions Test method for interturn insulation of AC low-voltage motors with scattered windings Test limits for interturn insulation of AC low-voltage motors with scattered windings 3 Types, basic parameters and dimensions
3.1 The motor housing protection grade is IP44 (see GB4942.1), 3.2 The motor cooling method is IC0141 (see GB1993). 3.3 The structure and installation type of the motor are IMB3, IMB35, IMV1 (see GB997). 3.4 The motor rating is a continuous rating based on the continuous duty system (S1). 3.5 The rated frequency of the motor is 50Hz, the rated voltage is 380V, the stator winding power is Y-connected when it is 3kW, and the other powers are △-connected, and the rotor winding is Y-connected.
3.6 The motor should be manufactured according to the following rated powers: 3, 4, 5.5, 7.5, 11, 15, 18.5, 22, 30, 37.45, 55, 75, 90, 110, 132kW3.7 The corresponding relationship between the motor frame number and the speed and power shall be in accordance with the provisions of Table 1. 3.8 The installation dimensions and tolerances of the motor shall comply with the provisions of Tables 2 to 4, and the overall dimensions shall not exceed the provisions of Tables 2 to 4. Approved by the Ministry of Machinery and Electronics Industry on October 8, 1993, and implemented on January 1, 1994
Machine frame number
JB/T7119-1993
Synchronous speed, t/min
Power, kw
Note: The numbers 1 and 2 after S, M, and L represent different powers under the same machine frame number and speed. 750
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8Vehicle Service System N.
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JB/T7119-1993
The size and tolerance of the motor shaft extension key shall comply with the provisions of Table 5. 3.9
Shaft extension diameter
The radial runout tolerance at half the shaft extension length shall comply with the provisions of Table 6. Table 6
Shaft extension diameter
>30~50
>50~80
Radial runout tolerance
3.11 The radial runout tolerance of the flange stop to the motor axis and the radial runout tolerance of the flange fit to the motor axis shall comply with Table 73.9
JB/T7119-1993
The dimensions and tolerances of the motor shaft extension chain shall comply with the provisions of Table 5. Table 5
Shaft extension diameter
The radial runout tolerance at half the shaft extension length
shall comply with the provisions of Table 6. Table 6
>30~50
>50~80
Radial circle runout tolerance
The radial circle runout tolerance of the flange stop to the motor axis and the radial circle runout tolerance of the flange fit to the motor axis shall comply with the provisions of Table 73.11
.
Flange stop diameter
130~230
>230~450
>450~680
Circular runout tolerance
Parallelism tolerance of the motor axis to the foot support surface: 0.5mm for 132~250 frame sizes and 1mm for 280~316 frame sizes. The flatness tolerance of the motor foot support surface shall comply with the provisions of Table 8. Table 8
The maximum dimension in AB or BB
>160~250
>250~400
>400~680
>680~1000
Note: AB is the distance between the outer edges of the motor foot (end view), BB is the distance between the outer edges of the motor foot (side view), 3.14
The symmetry tolerance of the keyway on the motor shaft extension shall comply with the provisions of Table 9. Flatness tolerance
Technical requirements
Key width F
JB/T7119-1993
Symmetry tolerance
The motor shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 The motor shall be able to operate at rated speed under the following altitude ambient air temperature and ambient air relative condensation conditions. 4.2.1
Altitude shall not exceed 1000mm.
The maximum ambient air temperature varies with the seasons but shall not exceed 40℃. mm
Note: If the motor is specified to be used at an altitude exceeding 1000m or the ambient air temperature is higher or lower than 40℃, the provisions of GB755 shall be followed.4.2.3
The minimum ambient air temperature is -15℃.
The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall comply with the provisions of GB755. When the power, voltage and rated frequency of the motor are rated, the guaranteed values of its efficiency and power factor shall comply with the provisions of Table 10. Table 10
Efficiency%
Efficiency is determined by the indirect method with stray loss as 0.5% of the rated input, speed, r/min
Power factor cos
JB/T 71191993
The guaranteed values of the motor rotor open circuit voltage and rated rotor current shall comply with the provisions of Table 11, and the tolerances are all ±10%. Table 11
Rated rotor current, A
Synchronous speed, r/min
Rotor open circuit voltage, V
At rated voltage, the guaranteed value of the ratio of the motor's maximum torque to the rated torque is: 3.0 for a synchronous speed of 1500r/min, 2.8 for a synchronous speed of 1000r/min, and 2.4 for a synchronous speed of 750r/min. 4.7
The tolerances of the guaranteed values of the motor's electrical performance shall comply with the provisions of Table 12. Table 12
Electrical performance name
Rated power 45kW and below
Rated power above 45kW
Power factor cose
Maximum torque
-0.01(1-)
(1-c05g)/6At least —0.02
10% of the guaranteed value
The motor adopts Class B or Class F insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the motor with Class B insulation is wound with 4.The temperature rise limit of the motor windings of class F insulation (resistance method) and the temperature rise limit of the collector rings of class B insulation (thermometer method) is 80K; the temperature rise limit of the motor windings of class F insulation (resistance method) and the temperature rise limit of the collector rings of class F insulation (thermometer method) is 105K, and the allowable temperature of the bearing (thermometer method) should not exceed 95℃.
If the altitude of the test site or the ambient air temperature is different from that specified in Article 4.2, the temperature rise limit should be revised according to the provisions of GB755. 4.9
The motor should be able to withstand the maximum torque value specified in Article 4.6 of this standard (including tolerance) in the hot state and with gradually increasing torque for 15s without sudden change in speed, stoppage and harmful deformation. At this time, the voltage and frequency should maintain the rated value. 80
JB/T71191993
The motor should be able to withstand an increase in speed to 120% of its rated value for 2 minutes without harmful deformation when it is unloaded. 4.11 When the motor is in a hot state or after a temperature rise test, the insulation resistance of the stator winding should not be less than 0.38MQ, and the insulation resistance of the rotor winding should not be less than 0.5Mn.
The windings of the motor should be able to withstand a withstand voltage test for 1 minute without breakdown. The frequency of the test voltage is 50Hz and it should be a sine wave as much as possible. The effective value of the voltage is 1760V for the stator and 1000+2 times the rotor open circuit voltage for the rotor, but not less than 1500V. 4.13
The windings of the motor should be able to withstand an inter-turn impulse withstand voltage test without breakdown. The peak value of the impulse test voltage shall comply with the provisions of JB/Z340. After the motor is tested for 6 cycles according to the 40°C alternating damp heat test method specified in GB12665, the insulation resistance of the stator winding shall not be less than 0.38MQ, and the insulation resistance of the rotor winding shall not be less than 0.5MQ, and it shall be able to withstand the voltage withstand test specified in Article 4.12 without breakdown. However, the effective value of the voltage is 1500V for the stator winding and 0.85 times of Article 4.12 for the rotor winding. 4.15
The effective value of the vibrating speed measured when the motor is no-load shall not exceed the provisions of Table 13. Table 13
Frame number
Effective value of vibration speed
>132~225
>225~315
The noise value of the A-weighted sound power level measured when the motor is no-load shall comply with the value specified in Table 14, and the tolerance of the noise value is +3dB(A).
Synchronous speed, r/min
Power, kW
Sound power level
When the three-phase power supply is balanced, the deviation of any phase of the three-phase no-load current of the motor from the three-phase average value shall not exceed 10% of the three-phase average 9
value.
JB/T7119-1993
3When the motor is stationary, the deviation of any phase of the rotor three-phase voltage from the three-phase average value shall not exceed 2% of the three-phase average value. 4.18
When the motor is inspected and tested, the no-load current and loss shall be within a certain data range, and the data range shall ensure that the motor performance4.19
complies with the provisions of Articles 4.4 to 4.7 of this standard. The unevenness of the motor air gap shall not exceed the provisions of Table 15. 4.20
In the table, the nominal value of the air gap is an uneven value, which is defined as
8+88,82-6,8-8,g
where: , 82, 63——the air gap value measured at a distance of 120°4.21The motor has only one cylindrical shaft extension. 0. 60
The stator of the motor should be made with six outlet terminals, and the rotor should be made with three outlet terminals. When viewed from the shaft extension end, the motor's wire junction box4.22
should be placed on the right side of the base. The motor's junction box should have a grounding terminal. For motors with a rated output exceeding 100kW, two additional grounding terminals should be installed on the base, and a grounding mark should be set near the grounding terminal. This mark should be ensured to be difficult to erase during the entire service life of the motor.
4.23 When the alphabetical sequence of the terminal markings is the same as the voltage phase sequence of the three-phase power supply, the motor should rotate clockwise from the shaft extension end.
5 Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. 2 Each motor shall be inspected and tested. The inspection and test items include: 5.2
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator and rotor windings to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but it should be ensured that the insulation resistance in the hot state is not lower than the provisions of Article 4.11); c.
Measurement of the DC resistance of the stator and rotor windings in the actual cold state; withstand voltage test of the stator and rotor windings to the housing and between phases; insulation test;
measurement of no-load current and loss;
measurement of the rotor open circuit voltage
noise (according to the provisions of Article 5.6); measurement of vibration (according to the provisions of Article 5.6). Type tests must be carried out in any of the following situations: a. When the manufacturer conducts the first trial production or small batch trial production after the finalization of the motor; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when the inspection test results and the previous type test results have an unacceptable deviation; the batch production of motors is subject to regular random testing, once a year. When the number of random tests is too large, the random test interval can be appropriately increased.60
The stator of the motor should be made with six outlet terminals, and the rotor should be made with three outlet terminals. When viewed from the shaft extension end, the motor's terminal box 4.22
should be placed on the right side of the base. There should be a grounding terminal in the motor terminal box. For motors with a rated output exceeding 100kW, two additional grounding terminals should be installed on the base, and a grounding mark should be set near the grounding terminal. This mark should ensure that it is not easily erased during the entire service life of the motor.
4.23 When the alphabetical sequence of the terminal mark is the same as the voltage phase sequence direction of the three-phase power supply, the motor should rotate in a clockwise direction when viewed from the shaft extension end.
5 Inspection rules
Each motor must pass the inspection before it can leave the factory, and a product certificate should be attached. 2 Each motor shall be inspected and tested. The inspection and test items include: 5.2 Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of insulation resistance of stator and rotor windings to the housing and between windings (cold insulation resistance can be measured during inspection test, but it should be ensured that the insulation resistance in hot state is not lower than the provisions of Article 4.11); c. Measurement of DC resistance of stator and rotor windings in actual cold state; withstand voltage test of stator and rotor windings to the housing and phase-to-phase insulation test; measurement of no-load current and loss; measurement of rotor open circuit voltage and noise (according to the provisions of Article 5.6); measurement of vibration (according to the provisions of Article 5.6). Type tests must be carried out in any of the following situations: a. When the manufacturer conducts the first trial production or small-batch trial production after the finalization of the motor; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when the inspection test results and the previous type test results have an unacceptable deviation; the batch production of motors is subject to regular random testing, once a year. When the number of random tests is too large, the random test interval can be appropriately increased.60
The stator of the motor should be made with six outlet terminals, and the rotor should be made with three outlet terminals. When viewed from the shaft extension end, the motor's terminal box 4.22
should be placed on the right side of the base. There should be a grounding terminal in the motor terminal box. For motors with a rated output exceeding 100kW, two additional grounding terminals should be installed on the base, and a grounding mark should be set near the grounding terminal. This mark should ensure that it is not easily erased during the entire service life of the motor.
4.23 When the alphabetical sequence of the terminal mark is the same as the voltage phase sequence direction of the three-phase power supply, the motor should rotate in a clockwise direction when viewed from the shaft extension end.
5 Inspection rules
Each motor must pass the inspection before it can leave the factory, and a product certificate should be attached. 2 Each motor shall be inspected and tested. The inspection and test items include: 5.2 Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of insulation resistance of stator and rotor windings to the housing and between windings (cold insulation resistance can be measured during inspection test, but it should be ensured that the insulation resistance in hot state is not lower than the provisions of Article 4.11); c. Measurement of DC resistance of stator and rotor windings in actual cold state; withstand voltage test of stator and rotor windings to the housing and phase-to-phase insulation test; measurement of no-load current and loss; measurement of rotor open circuit voltage and noise (according to the provisions of Article 5.6); measurement of vibration (according to the provisions of Article 5.6). Type tests must be carried out in any of the following situations: a. When the manufacturer conducts the first trial production or small-batch trial production after the finalization of the motor; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when the inspection test results and the previous type test results have an unacceptable deviation; the batch production of motors is subject to regular random testing, once a year. When the number of random tests is too large, the random test interval can be appropriately increased.
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