JB/T 7075-2002 Technical requirements for YZD series multi-speed three-phase asynchronous motors for hoisting
Some standard content:
ICS29.160.30
(D,a EEAn1 2 0 11 >UDuBEQ+e ×/YZDE
2002-07-164
JB/T70752002
JB/T70751993
2002-12-01
This standard replaces JB/T7075-1993 "Technical conditions for multi-speed three-phase asynchronous motors for YZD series hoisting". The main changes of this standard compared with JB/T7075-1993 are as follows: Supplement the wiring method for two-speed and three-speed: The referenced documents are revised to indicate the date and the current latest version is cited: - Added numerical rounding rules; | |tt||Added some specifications for frame sizes 112, 132, 160 and 250. This standard was proposed by the China Machinery Industry Federation. JB/T7075—2002
This standard is under the jurisdiction of the National Technical Committee for Standardization of Rotating Electrical Machines, Hoisting Metallurgy and Shielded Electrical Machines Standardization Sub-Technical Committee (SACTC26SC4).
Drafting units of this standard: Jiamusi Explosion-proof Electrical Machine Research Institute, Jiamusi Electrical Machine Co., Ltd., Shanxi Electrical Machine Manufacturing Co., Ltd., Shunde Desheng Electrical Machine Co., Ltd.
Main drafters of this standard: Zhao Guoyan, Chen Pu, Chen Qing, Miao Feng. The previous versions of the standards replaced by this standard are: -JB/DQ3195——1987:
-JB/T7075—1993
1 Scope
Technical conditions for YZD series multi-speed single-phase asynchronous motors for hoisting
JB/T7075—2002
This standard specifies the type, basic parameters and dimensions, technical requirements, inspection rules, marking and packaging requirements of YZD series multi-speed three-phase asynchronous motors for hoisting.
This standard is applicable to various cranes Three-phase asynchronous motors for electric transmission (hereinafter referred to as motors), all kinds of motors derived from this series of motors can also be implemented by reference. 2 Normative reference documents
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties who reach an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard. GB/T191-20 00 Packaging, storage and transportation pictorial mark (eqvISO780:1997) GB755-2000 Rotating motor rating and performance (idtEC60034-1:1996) GB/T757-1993 Rotating motor conical shaft extension GB/T997-1981 Motor structure and installation type code (neq[EC60034-7:1972) Three-phase asynchronous motor test method
GB/T1032-1985
GB/T1096-1979
Ordinary flat key type size
GB/T1993—1993 Cooling method for rotating electrical machines GB/T2423.41993 Basic environmental test procedures for electrical products Test Db: Alternating damp heat test method (eqIEC60068-2-30:1980) GB/T4772.1—1999 Dimensions and output power classes of rotating electrical machines Part 1: Frame sizes 56 to 400 and flange sizes 55 to 1080 (idtIEC60072-1:1991) Grade (IP code) (idtEC60034-5:1991) GB/T4942.1-2001
GB10068--2000 Mechanical vibration of motors with a shaft center height of 56mm or more Vibration measurement, evaluation and limit values (idtEC60034-14:1996)
GB10069.3-1988 Rotating motor noise measurement method and limit values Noise limit values (neqEC60034-9) GB14711--1993 General safety requirements for small and medium-sized rotating motors (neqIEC600 34-1) JB/T9615.1-2000 Test method for inter-turn insulation of scattered windings of AC low-voltage motors JB/T9615.2--2000 Test limits for inter-turn insulation of scattered windings of AC low-voltage motors 3 Types, basic parameters and dimensions
3.1 The protection level of the motor housing is IP44, and the protection level of the terminal box is IP54 (see GB/T4942.1-2001) 3.2 Motor cooling method: Frame numbers 112 and 132 are IC410, and frame numbers 160250 are IC411 (see GB/T1993-1993). 3.3 The structure and installation type of the motor are IM1001, IM1002, IM1003, and IM1004 (see GB/T997-1981), and are manufactured in accordance with the provisions of Table 1.
3.4 The rated power of the motor in the reference working system shall comply with the provisions of Table 2. 3.5 Motor basic working system: high speed is S325%, low speed is S315% (i.e. basic working system is S3, basic load duration is 1
JB/T70752002
Structural installation type
25%, 15%, each working cycle is 10min). Table
IM1001
IM1003
IM1002
IM1004
Note: high speed refers to synchronous speed of 750r/min~1500r/min, low speed refers to synchronous speed of 250t/min~375/min. Manufacturing range (frame size)
112--160
180-250
112~160
180~250
3.6 The rated frequency of the motor is 50Hz, the rated voltage is 380V: the stator winding is Y/Y and Y/Y/Y connection, the corresponding relationship between the speed ratio, rated power, rotor moment of inertia J and frame size of the motor in the reference working system shall comply with the provisions of Table 2, 3.7
Synchronous speed
Frame size
1500/375
1500/250
1000/375
Power kw
Note: The 1 and 2 after M represent different powers under the same frame size and speed, 3.8 The tolerance of the moment of inertia is +10%.
3.9 Dimensions and tolerances of motors:
750/300
1500/750/250
13/11/3.0
15/13/3.0
22/20/3.7
kg·m?
3.9.1 The installation dimensions and tolerances of motors shall comply with the provisions of Table 3 (see GB/T4772.1-1999): The overall dimensions shall not exceed the provisions of Table 3.
3.9.2 The dimensions and tolerances of motor shaft extension keys shall comply with the provisions of Table 4 (see GB/T1096-1979) 3.9.3 The radial runout tolerance at half the length of the motor shaft extension shall not exceed the provisions of Table 5. 3.9.4 The parallelism tolerance of the motor axis to the foot support plane should not be greater than 0.50mm2
IM1001, IM1003 and IM1002, IM1004 motors with foot and no convex green on the end cover Figure 1
Installation dimensions and tolerances
Dimensional deviation
305133
±4.0295.
If the position of the hole is qualified, A/2 can be exempted from the assessment, and the axial deviation of the C dimension includes the movement of the shaft. The conical shaft extension shall be inspected according to the provisions of GB/T757-1993. Basic:
Dimension deviation
F0.046M42x3
Basic limit
Scale deviation
Basic limit
-0.04321.4
Dimension deviation
Position
M20515
Unit: mm
Overall dimensions
JB/T7075-
JB/T7075—2002
Shaft extension diameter D
Shaft extension diameter D
>30~50
10~036
3.9.5 The flatness tolerance of the supporting plane of the motor foot shall not be greater than that specified in Table 6. Table 6
The maximum dimension of the distance between the outer edges of the foot (AB or BB)>160~250
≥250~-400
400~630
6 The symmetry tolerance of the keyway of the motor shaft extension shall not be greater than that specified in Table 73.9.6
Keyway height
4 Technical requirements
Unit: mm
Unit: mm
Radial runout tolerance
Unit: rnm
Flatness tolerance
Unit: mm
Symmetry tolerance
4.1 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 when used under the following conditions. 4.2.1 The altitude shall not exceed 1000m. If the motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of GB755--2000. A
JB/T7075-2002
4.2.2 The maximum ambient air temperature varies with the seasons, but shall not exceed 40℃; the minimum ambient air temperature shall be -15℃. If the motor is specified to be used at an ambient air temperature higher or lower than the above provisions, it shall be handled in accordance with the provisions of GB755--2000. 4.2.3 The average maximum relative humidity of the wettest month shall be 90%, and the average minimum temperature of the month shall not be higher than 25℃. 4.2.4 Indoor use.
Frequent starting, braking (electrical or mechanical) and reversal. 4.2.5
Frequent mechanical vibration and impact.
The motor can be started directly at rated voltage. 4.2.7
4.3 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of the ratio of maximum torque and stall torque to rated torque shall not be less than that specified in Table 8, with a numerical rounding interval of 0.1. Table 8
Maximum torque/rated torque
Stalled torque/rated torque
4.4 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of stall current shall not be greater than that specified in Table 9, with a numerical rounding interval of 1. | |tt | |195/38
280/52
1000/375
stall current
122/30
178/40
750/300
160/45
220/58
300/80
660/128
1500/750/250
145/110/40
200/130/40
270/170/50
JB/T7075—2002
4.5 The tolerance of the guaranteed value of the motor electrical performance shall not exceed the provisions of Table 10. Table 10
Item name
Stalling torque
Maximum torque
Stalling current
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value -15%
4.6 The deviation between the rated value and the power supply voltage and frequency during the operation of the motor shall comply with the provisions of GB755-2000. 4.7 The motor adopts coupling or spur gear transmission. If spur gear transmission is adopted, the pitch circle diameter of the gear shall not be less than 2 times the shaft extension diameter.
4.8 The motor adopts F-class insulation. When the altitude and ambient air temperature meet the requirements of 4.2.1 and 4.2.2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the provisions of Table 11, and the correction interval is 1. If the altitude and ambient air temperature of the test site are different from those specified in 4.2.1 and 4.2.2, the temperature rise limit shall be amended in accordance with the provisions of GB755-2000.
Heating parts of the motor
Winding temperature rise (resistance method)
Bearing allowable temperature (thermometer method)
F grade insulation (ambient air temperature 40℃)
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 average value of the three phases shall not exceed 4.9
10% of the average value of the three phases.
4.10 The insulation resistance of the motor winding shall not be lower than the value obtained by the following formula in the hot state. R, =
1000+P/100bZxz.net
Where:
is the insulation resistance of the stator winding, in M2; R
is the rated voltage of the stator, in V; the rated power of the motor, in kw.
4.11 The stator winding of the motor shall be able to withstand the insulation withstand voltage test lasting 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be an AC voltage with a sinusoidal waveform as much as possible. The effective value of the voltage is 1000V+2U1. 4.12 The stator winding of the motor shall be able to withstand the inter-turn impulse withstand voltage test without breakdown. The peak value of the impulse voltage shall comply with the provisions of JB/T9615.2-2000.
4.13 The motor should be able to withstand the maximum torque at high speed specified in 4.3 (allowing tolerance) for 15 seconds without sudden speed change, stalling and harmful deformation when the motor is hot and gradually increasing the torque. At this time, the voltage and frequency should maintain the rated value. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6- and 8-pole motors. The motor should be able to withstand an overspeed test of 1.2 times the maximum speed when unloaded for 2 minutes. The rotor should not be harmfully deformed. 4.15 The unevenness of the motor air gap shall not exceed the provisions of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is no-load should not exceed the provisions of Table 13, and the numerical value is rounded off at an interval of 0.1. 4.17
The windings of the motor need to be subjected to six cycles of 40℃ alternating damp heat test. After the test, the insulation resistance should not be lower than the 6 specified in 4.10
JB/T7075-2002
and can withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage is 1500V.
In the table:
Basic size of air gap
Uneven value of air gap, defined as
182+82+8-88,-88-88
Where: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132
160~225
4.18 The noise limit of the A-weighted sound power level measured at high speed and no load of the motor shall not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is +3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located at the top of the frame, and the wires can be connected along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be provided near the grounding screw 4.19
, and this mark should ensure that the motor is not easily erased during the entire period of use. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711--1993. 4.22 The shaft extension key of the motor, the operating and maintenance instructions (at least one copy is provided for the same user and the same model of batch motor) and the product certificate should be provided to the user along with the motor. 4.23 If the user uses and stores the motor correctly in accordance with the provisions of the operating and maintenance instructions, the motor shall be used within one year, but no more than two years from the date of shipment from the manufacturer, if the motor is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge.1 The altitude shall not exceed 1000m. If the motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of GB755--2000. A
JB/T7075-2002
4.2.2 The maximum ambient air temperature varies with the seasons, but shall not exceed 40℃; the minimum ambient air temperature shall be -15℃. If the motor is specified to be used at an ambient air temperature higher or lower than the above provisions, it shall be handled in accordance with the provisions of GB755--2000. 4.2.3 The average maximum relative humidity of the wettest month shall be 90%, and the average minimum temperature of the month shall not be higher than 25℃. 4.2.4 Indoor use.
Frequent starting, braking (electrical or mechanical) and reversal. 4.2.5
Frequent mechanical vibration and impact.
The motor can be started directly at rated voltage. 4.2.7
4.3 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of the ratio of maximum torque and stall torque to rated torque shall not be less than that specified in Table 8, with a numerical rounding interval of 0.1. Table 8
Maximum torque/rated torque
Stalled torque/rated torque
4.4 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of stall current shall not be greater than that specified in Table 9, with a numerical rounding interval of 1. | |tt | |195/38
280/52
1000/375
stall current
122/30
178/40
750/300
160/45
220/58
300/80
660/128
1500/750/250
145/110/40
200/130/40
270/170/50
JB/T7075—2002
4.5 The tolerance of the guaranteed value of the motor electrical performance shall not exceed the provisions of Table 10. Table 10
Item name
Stalling torque
Maximum torque
Stalling current
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value -15%
4.6 The deviation between the rated value and the power supply voltage and frequency during the operation of the motor shall comply with the provisions of GB755-2000. 4.7 The motor adopts coupling or spur gear transmission. If spur gear transmission is adopted, the pitch circle diameter of the gear shall not be less than 2 times the shaft extension diameter.
4.8 The motor adopts F-class insulation. When the altitude and ambient air temperature meet the requirements of 4.2.1 and 4.2.2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the provisions of Table 11, and the rounding interval is 1. If the altitude and ambient air temperature of the test site are different from those specified in 4.2.1 and 4.2.2, the temperature rise limit shall be amended in accordance with the provisions of GB755-2000.
Heating parts of the motor
Winding temperature rise (resistance method)
Allowable bearing temperature (thermometer method)
F grade insulation (ambient air temperature 40℃)
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 average value of the three phases shall not exceed 4.9
10% of the average value of the three phases.
4.10The insulation resistance of the motor winding shall not be lower than the value obtained by the following formula in the hot state. R, =
1000+P/100
Where:
is the insulation resistance of the stator winding, in M2; R
is the rated voltage of the stator, in V; the rated power of the motor, in kw.
4.11 The stator winding of the motor shall be able to withstand the insulation withstand voltage test lasting 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be an AC voltage with a sinusoidal waveform as much as possible. The effective value of the voltage is 1000V+2U1. 4.12 The stator winding of the motor shall be able to withstand the inter-turn impulse withstand voltage test without breakdown. The peak value of the impulse voltage shall comply with the provisions of JB/T9615.2-2000.
4.13 The motor should be able to withstand the maximum torque at high speed specified in 4.3 (allowing tolerance) for 15 seconds without sudden speed change, stalling and harmful deformation when the motor is hot and gradually increasing the torque. At this time, the voltage and frequency should maintain the rated value. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6- and 8-pole motors. The motor should be able to withstand an overspeed test of 1.2 times the maximum speed when unloaded for 2 minutes. The rotor should not be harmfully deformed. 4.15 The unevenness of the motor air gap shall not exceed the provisions of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is no-load should not exceed the provisions of Table 13, and the numerical value is rounded off at an interval of 0.1. 4.17
The windings of the motor need to be subjected to six cycles of 40℃ alternating damp heat test. After the test, the insulation resistance should not be lower than the 6 specified in 4.10
JB/T7075-2002
and can withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage is 1500V.
In the table:
Basic size of air gap
Uneven value of air gap, defined as
182+82+8-88,-88-88
Where: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132
160~225
4.18 The noise limit of the A-weighted sound power level measured at high speed and no load of the motor shall not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is +3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located at the top of the frame, and the wires can be connected along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be provided near the grounding screw 4.19
, and this mark should ensure that the motor is not easily erased during the entire period of use. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711--1993. 4.22 The shaft extension key of the motor, the operating and maintenance instructions (at least one copy is provided for the same user and the same model of batch motor) and the product certificate should be provided to the user along with the motor. 4.23 If the user uses and stores the motor correctly in accordance with the provisions of the operating and maintenance instructions, the motor shall be used within one year, but no more than two years from the date of shipment from the manufacturer, if the motor is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge.1 The altitude shall not exceed 1000m. If the motor is specified to be used at an altitude exceeding 1000m, it shall be handled in accordance with the provisions of GB755--2000. A
JB/T7075-2002
4.2.2 The maximum ambient air temperature varies with the seasons, but shall not exceed 40℃; the minimum ambient air temperature shall be -15℃. If the motor is specified to be used at an ambient air temperature higher or lower than the above provisions, it shall be handled in accordance with the provisions of GB755--2000. 4.2.3 The average maximum relative humidity of the wettest month shall be 90%, and the average minimum temperature of the month shall not be higher than 25℃. 4.2.4 Indoor use.
Frequent starting, braking (electrical or mechanical) and reversal. 4.2.5
Frequent mechanical vibration and impact.
The motor can be started directly at rated voltage. 4.2.7
4.3 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of the ratio of maximum torque and stall torque to rated torque shall not be less than that specified in Table 8, with a numerical rounding interval of 0.1. Table 8
Maximum torque/rated torque
Stalled torque/rated torque
4.4 When the motor is at rated voltage, rated frequency and reference duty, the guaranteed value of stall current shall not be greater than that specified in Table 9, with a numerical rounding interval of 1. | |tt | |195/38
280/52
1000/375
stall current
122/30
178/40
750/300
160/45
220/58
300/80
660/128
1500/750/250
145/110/40
200/130/40
270/170/50
JB/T7075—2002
4.5 The tolerance of the guaranteed value of the motor electrical performance shall not exceed the provisions of Table 10. Table 10
Item name
Stalling torque
Maximum torque
Stalling current
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value -15%
4.6 The deviation between the rated value and the power supply voltage and frequency during the operation of the motor shall comply with the provisions of GB755-2000. 4.7 The motor adopts coupling or spur gear transmission. If spur gear transmission is adopted, the pitch circle diameter of the gear shall not be less than 2 times the shaft extension diameter.
4.8 The motor adopts F-class insulation. When the altitude and ambient air temperature meet the requirements of 4.2.1 and 4.2.2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the provisions of Table 11, and the rounding interval is 1. If the altitude and ambient air temperature of the test site are different from those specified in 4.2.1 and 4.2.2, the temperature rise limit shall be amended in accordance with the provisions of GB755-2000.
Heating parts of the motor
Winding temperature rise (resistance method)
Bearing allowable temperature (thermometer method)
F grade insulation (ambient air temperature 40℃)
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 average value of the three phases shall not exceed 4.9
10% of the average value of the three phases.
4.10 The insulation resistance of the motor winding shall not be lower than the value obtained by the following formula in the hot state. R, =
1000+P/100
Where:
is the insulation resistance of the stator winding, in M2; R
is the rated voltage of the stator, in V; the rated power of the motor, in kw.
4.11 The stator winding of the motor shall be able to withstand the insulation withstand voltage test lasting 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be an AC voltage with a sinusoidal waveform as much as possible. The effective value of the voltage is 1000V+2U1. 4.12 The stator winding of the motor shall be able to withstand the inter-turn impulse withstand voltage test without breakdown. The peak value of the impulse voltage shall comply with the provisions of JB/T9615.2-2000.
4.13 The motor should be able to withstand the maximum torque at high speed specified in 4.3 (allowing tolerance) for 15 seconds without sudden speed change, stalling and harmful deformation when the motor is hot and gradually increasing the torque. At this time, the voltage and frequency should maintain the rated value. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6- and 8-pole motors. The motor should be able to withstand an overspeed test of 1.2 times the maximum speed when unloaded for 2 minutes. The rotor should not be harmfully deformed. 4.15 The unevenness of the motor air gap shall not exceed the provisions of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is no-load should not exceed the provisions of Table 13, and the numerical value is rounded off at an interval of 0.1. 4.17
The windings of the motor need to be subjected to six cycles of 40℃ alternating damp heat test. After the test, the insulation resistance should not be lower than the 6 specified in 4.10
JB/T7075-2002
and can withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage is 1500V.
In the table:
Basic size of air gap
Uneven value of air gap, defined as
182+82+8-88,-88-88
Where: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132
160~225
4.18 The noise limit of the A-weighted sound power level measured at high speed and no load of the motor shall not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is +3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located at the top of the frame, and the wires can be connected along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be provided near the grounding screw 4.19
, and this mark should ensure that the motor is not easily erased during the entire period of use. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711--1993. 4.22 The shaft extension key of the motor, the operating and maintenance instructions (at least one copy is provided for the same user and the same model of batch motor) and the product certificate should be provided to the user along with the motor. 4.23 If the user uses and stores the motor correctly in accordance with the provisions of the operating and maintenance instructions, the motor shall be used within one year, but no more than two years from the date of shipment from the manufacturer, if the motor is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge.7
1500/375
105/25
140/40
1500/250
145/30
195/38| |tt||280/52
1000/375
stall current
122/30
178/40
750/300||tt ||16 0/45
220/58
300/80
660/128
1500/750/250
145/110/40||tt ||200/130/40
270/170/50
JB/T7075—2002
4.5 The tolerance of the guaranteed value of the motor electrical performance shall not exceed the provisions of Table 10. Table 10
Item name
Locked-rotor torque
Maximum torque
Locked-rotor current
15% of guaranteed value
Guaranteed value -10%
Guaranteed value -15%
4.6 The deviation between the power supply voltage and frequency and the rated value during the operation of the motor shall comply with the provisions of GB755-2000. 4.7 The motor adopts a coupling or Spur gear transmission, if spur gear transmission is used, the gear pitch diameter should not be less than 2 times the shaft extension diameter.
4.8 The motor adopts F-class insulation. When the altitude and ambient air temperature meet 4.2.1 and 4.2 .2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the provisions of Table 11, with a correction interval of 1. If the altitude and ambient air temperature of the test site are different from those specified in 4.2.1 and 4.2.2, the temperature rise limit should be revised according to the provisions of GB755-2000.
Heating parts of the motor
Winding Temperature rise (resistance method)
Bearing allowable temperature (thermometer method)
F class insulation (ambient air temperature 40℃)
When the three-phase power supply is balanced, the motor three-phase is unloaded The deviation of any phase from the three-phase average current should not exceed 4.9
10% of the three-phase average current.
4.10 The insulation resistance of the motor winding should not be less than the following in the hot state The value obtained by the formula. R, =
1000+P/100
Wherein:
is the insulation resistance of a stator winding, in M2; R
Ui is the rated voltage of the stator, in The motor rated power is in kw.
4.11 The stator winding of the motor should be able to withstand the insulation withstand voltage test lasting 1 minute without breakdown. The test voltage frequency is 50Hz and should be a sinusoidal AC waveform as much as possible. Voltage. The effective value of the voltage is 1000V+2U1. 4.12 The stator winding of the motor should be able to withstand the turn-to-turn impulse voltage test without breakdown, and the impulse voltage peak value shall comply with the provisions of JB/T9615.2-2000.
4.13 The motor should be able to withstand the maximum torque at high speed specified in 4.3 (allowing tolerance) for 15 seconds without sudden speed change or stall when in hot state and with gradually increasing torque. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6-pole and 8-pole motors. The motor should be able to withstand an overspeed test of 1.2 times the maximum speed for 2 minutes, and the rotor should not be subject to harmful deformation. 4.15 The unevenness of the motor air gap should not exceed the requirements of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is unloaded shall not exceed the provisions of Table 13, and the numerical value shall be rounded off at an interval of 0.1. 4.17
The winding of the motor shall be subjected to six cycles of 40°C alternating damp heat test. After the test, the insulation resistance shall not be less than that specified in 4.106
JB/T7075-2002
and shall be able to withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage shall not be less than that specified in 4.106
JB/T7075-2002
It is 1500V.
In the table:
Basic size of the air gap
Uneven value of the air gap, which is defined as
182+82+8-88,-88-88
Among them: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132||tt ||160~225
4.18 The noise limit of the A-weighted sound power level measured by the motor at high speed and no load should not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is + 3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located on the top of the base, and the wires can be led out along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be placed near the grounding screw. This mark should be ensured to be hard to be erased during the entire service life of the motor. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 The safety requirements of this standard are not 4.22 The motor shaft extension key, operating and maintenance manual (at least one copy for the same user and the same model of the same batch of motors) and product certificate shall be provided to the user together with the motor. If the motor is damaged or fails to work properly due to poor manufacturing quality within one year of use but no more than two years from the date of shipment from the manufacturer, the manufacturer shall Parts or motors should be repaired or replaced free of charge for users.7
1500/375
105/25
140/40
1500/250
145/30
195/38| |tt||280/52
1000/375
stall current
122/30
178/40
750/300||tt ||16 0/45
220/58
300/80
660/128
1500/750/250
145/110/40||tt ||200/130/40
270/170/50
JB/T7075—2002
4.5 The tolerance of the guaranteed value of the motor electrical performance shall not exceed the provisions of Table 10. Table 10
Item name
Locked-rotor torque
Maximum torque
Locked-rotor current
15% of guaranteed value
Guaranteed value -10%
Guaranteed value -15%
4.6 The deviation between the power supply voltage and frequency and the rated value during the operation of the motor shall comply with the provisions of GB755-2000. 4.7 The motor adopts a coupling or Spur gear transmission, if spur gear transmission is used, the gear pitch diameter should not be less than 2 times the shaft extension diameter.
4.8 The motor adopts F-class insulation. When the altitude and ambient air temperature meet 4.2.1 and 4.2 .2, the temperature rise limit and allowable temperature of each heating part of the motor shall not exceed the provisions of Table 11, with a correction interval of 1. If the altitude and ambient air temperature of the test site are different from those specified in 4.2.1 and 4.2.2, the temperature rise limit should be revised according to the provisions of GB755-2000.
Heating parts of the motor
Winding Temperature rise (resistance method)
Bearing allowable temperature (thermometer method)
F class insulation (ambient air temperature 40℃)
When the three-phase power supply is balanced, the motor three-phase is unloaded The deviation of any phase from the three-phase average current should not exceed 4.9
10% of the three-phase average current.
4.10 The insulation resistance of the motor winding should not be less than the following in the hot state The value obtained by the formula. R, =
1000+P/100
Wherein:
is the insulation resistance of a stator winding, in M2; R
Ui is the rated voltage of the stator, in The motor rated power is in kw.
4.11 The stator winding of the motor should be able to withstand the insulation withstand voltage test lasting 1 minute without breakdown. The test voltage frequency is 50Hz and should be a sinusoidal AC waveform as much as possible. Voltage. The effective value of the voltage is 1000V+2U1. 4.12 The stator winding of the motor should be able to withstand the turn-to-turn impulse voltage test without breakdown, and the impulse voltage peak value shall comply with the provisions of JB/T9615.2-2000.
4.13 The motor should be able to withstand the maximum torque at high speed specified in 4.3 (allowing tolerance) for 15 seconds without sudden speed change or stall when in hot state and with gradually increasing torque. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6-pole and 8-pole motors. The rotor should be able to withstand an overspeed test of 1.2 times the maximum speed for 2 minutes, and no harmful deformation should occur to the rotor. 4.15 The unevenness of the motor air gap should not exceed the requirements of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is unloaded shall not exceed the provisions of Table 13, and the numerical value shall be rounded off at an interval of 0.1. 4.17
The winding of the motor shall be subjected to six cycles of 40°C alternating damp heat test. After the test, the insulation resistance shall not be less than that specified in 4.106
JB/T7075-2002
and shall be able to withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage shall not be less than that specified in 4.106
JB/T7075-2002
It is 1500V.
In the table:
Basic size of the air gap
Uneven value of the air gap, which is defined as
182+82+8-88,-88-88
Among them: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132||tt ||160~225
4.18 The noise limit of the A-weighted sound power level measured by the motor at high speed and no load should not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is + 3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located on the top of the base, and the wires can be led out along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be placed near the grounding screw. This mark should be ensured to be hard to be erased during the entire service life of the motor. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 The safety requirements of this standard are not 4.22 The motor shaft extension key, operating and maintenance manual (at least one copy for the same user and the same model of the same batch of motors) and product certificate shall be provided to the user together with the motor. If the motor is damaged or fails to work properly due to poor manufacturing quality within one year of use but no more than two years from the date of shipment from the manufacturer, the manufacturer shall Parts or motors should be repaired or replaced free of charge for users.3. The maximum torque at high speed specified in the regulations (allowing tolerance) shall last for 15 seconds without sudden change in speed, stalling and harmful deformation. At this time, the voltage and frequency shall maintain the rated value. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6-pole and 8-pole motors. The motor shall be able to withstand an overspeed test of 1.2 times the maximum speed when unloaded for 2 minutes. The rotor shall not be subject to harmful deformation. 4.15 The unevenness of the motor air gap shall not exceed the provisions of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is no-load should not exceed the provisions of Table 13, and the numerical value is rounded off at an interval of 0.1. 4.17
The windings of the motor need to be subjected to six cycles of 40℃ alternating damp heat test. After the test, the insulation resistance should not be lower than the 6 specified in 4.10
JB/T7075-2002
and can withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage is 1500V.
In the table:
Basic size of air gap
Uneven value of air gap, defined as
182+82+8-88,-88-88
Where: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132
160~225
4.18 The noise limit of the A-weighted sound power level measured at high speed and no load of the motor shall not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is +3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located at the top of the frame, and the wires can be connected along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be provided near the grounding screw 4.19
, and this mark should ensure that the motor is not easily erased during the entire period of use. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711--1993. 4.22 The shaft extension key of the motor, the operating and maintenance instructions (at least one copy is provided for the same user and the same model of batch motor) and the product certificate should be provided to the user along with the motor. 4.23 If the user uses and stores the motor correctly in accordance with the provisions of the operating and maintenance instructions, the motor shall be used within one year, but no more than two years from the date of shipment from the manufacturer, if the motor is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge.3. The maximum torque at high speed specified in the regulations (allowing tolerance) shall last for 15 seconds without sudden change in speed, stalling and harmful deformation. At this time, the voltage and frequency shall maintain the rated value. 4.14 The maximum allowable speed of the motor is 2 times the synchronous speed at high speed for 4-pole motors and 2.5 times the synchronous speed at high speed for 6-pole and 8-pole motors. The motor shall be able to withstand an overspeed test of 1.2 times the maximum speed when unloaded for 2 minutes. The rotor shall not be subject to harmful deformation. 4.15 The unevenness of the motor air gap shall not exceed the provisions of Table 12. 4.16 The effective value of the vibration intensity measured when the motor is no-load should not exceed the provisions of Table 13, and the numerical value is rounded off at an interval of 0.1. 4.17
The windings of the motor need to be subjected to six cycles of 40℃ alternating damp heat test. After the test, the insulation resistance should not be lower than the 6 specified in 4.10
JB/T7075-2002
and can withstand the voltage withstand test specified in 4.11 of this standard without breakdown, but the effective value of the test voltage is 1500V.
In the table:
Basic size of air gap
Uneven value of air gap, defined as
182+82+8-88,-88-88
Where: 81, 82, 83 are the air gap values measured at a distance of 120″. Table 13
Frame number
Vibration severity
112132
160~225
4.18 The noise limit of the A-weighted sound power level measured at high speed and no load of the motor shall not exceed the provisions of Table 14, and the numerical rounding interval is 1. The tolerance is +3dB (A).
Synchronous speed
Sound power level
The stator terminal box of the motor is located at the top of the frame, and the wires can be connected along both sides of the motor. There is a grounding screw in the terminal box, and A grounding mark should be provided near the grounding screw 4.19
, and this mark should ensure that the motor is not easily erased during the entire period of use. 4.20 Each fastening bolt on the motor must have anti-loosening measures. 4.21 Where the safety requirements of this standard are not specified, they shall comply with the provisions of GB14711--1993. 4.22 The shaft extension key of the motor, the operating and maintenance instructions (at least one copy is provided for the same user and the same model of batch motor) and the product certificate should be provided to the user along with the motor. 4.23 If the user uses and stores the motor correctly in accordance with the provisions of the operating and maintenance instructions, the motor shall be used within one year, but no more than two years from the date of shipment from the manufacturer, if the motor is damaged or fails to work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts or motors for the user free of charge.
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