JB/T 6448-1992 Technical Specifications for YEP Series (IP44) Three-phase Asynchronous Motors with Side Magnetic Braking (Frame Size 80～160)
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6448-1992
Technical conditions for YEP series (IP44) three-phase asynchronous motors with lateral magnetic braking
(Frame size 80～160)
Published on August 6, 1992
Implementation on January 1, 1993 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Technical conditions for YEP series (IP44) three-phase asynchronous motors with lateral magnetic braking
(Frame size 80～160)
Subject content and scope of application
JB/T 6448-1992
This standard specifies the type, basic parameters and dimensions, technical requirements, test methods and inspection rules of YEP series three-phase asynchronous motors with magnetic brake, as well as requirements for marking, packaging and warranty period. This standard applies to YEP series (IP44) three-phase asynchronous motors with magnetic brake (frame size 80-160) (hereinafter referred to as motors). All series of motors derived from this series of motors can also refer to it. 2 Reference standards
Rotating motors
GR1993
Basic technical requirements
Motor housing protection classification
Motor cooling method
Motor structure and installation type code
GB 4772.1
GB12665
GB10069
GB10068
GB1032
JB/Z294
JB/Z346
Motor dimensions and tolerances
Motors with frame size 36400 and flange size FF55 to FF1080 or FT55 to FT1080. Requirements for damp heat test of motors used under normal environmental conditions: Rotational Motor
Rotating motor
Noise determination method and limit
Vibration determination method and limit
Three-phase asynchronous motor test method
AC low-voltage motor scattered winding turn-to-turn insulation test method AC low-voltage motor scattered winding turn-to-turn insulation test limit Packaging storage and transportation diagram mark
Type, basic parameters and dimensions
3.1 The enclosure protection level of the motor is IP44 (see GB4942.1). 3.2 The cooling method of the motor is IC0141 (see GB1993). 3.3 The structure and installation type of the motor are 1MB3, 1MB5, 1MB6, 1MB7, 1MB8 and 1MB35 (see GB997). 3.4 The motor rating is a cycle duty rating based on the intermittent cycle duty system (S3), and the duty cycle (FC) is 25% (each duty cycle is 10min).
5 The rated frequency of the motor is 50Hz, and the rated voltage is 380V. Y connection. 3.5
3.6 The motor should be manufactured according to the following rated powers: 0.55, 0.75, 1.1, 1.5.2.2, 3, 4, 5.5, 7.5, 11k. 3.7
The corresponding relationship between the motor frame number and the speed and power shall be in accordance with the provisions of Table 1. Approved by the Ministry of Machinery and Electronics Industry on August 6, 1992 and implemented on January 1, 1993
JB/T6448-1992
Synchronous speed, /min
Different powers under the same frame number and speed. Note: The numbers 1 and 2 after SM and L represent the size and tolerance of the same motor
power, kw
The external dimensions should not be greater than the provisions of Tables 2 to 4. The installation dimensions and tolerances of the motor shall comply with the provisions of Tables 2 to 4. 90S
H80~132
Note: 1》GE-D—G.GE's plate limit screen difference for machine base number B0 is [2》K hole position is based on the axis of the shaft Buddha Rta
Table 2 Machine base with foot, end without flange, etc. The rest are
165175150175
185195160
Guo0205215| |tt||245240
280275210
Note: 1) The plate limit difference of GE-D-G.GE for machine frame No. 80 is [2》The position of the K hole is based on the axis of the shaft + 0.009
, and the rest is
165175
net 1.0205215
245244
280275
41. 5(M330|335|
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H80 ~132
110|±0. 43012
Electric motor with no foot on the base and flange on the end cover
165130
215180
265230
+0, 015
300250
Note: 1) GE = DG.CE plate limit deviation (80 is: +8.10). The remaining % (+0.20) is the distance between the body and the mating surface
4) The position of the S resistance is based on the axis line 350
JB/T6448-1992
The size and tolerance of the motor shaft extension key shall comply with the provisions of Table 5. Table 5
Shaft extension diameter
The radial runout tolerance of the motor shaft extension at half of the length shall comply with the provisions of Table 6. Table 6
H80100
Position seat
Difference size
External size
150185350
215180
245470
265475
Radial runout tolerance
3.8.4 The radial runout tolerance of the motor flange stop to the motor axis and the end face runout tolerance of the flange mating surface to the motor axis ba
JB/T6448-1992
The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 5. Table 5
Shaft extension diameter
6-. .c30
The radial runout tolerance at half the length of the motor shaft extension shall comply with the provisions of Table 6. Table 6
>30~50
Radial runout tolerance
3.8.4 The radial runout tolerance of the motor flange stop to the motor axis and the end face runout tolerance of the flange mating surface to the motor axis shall comply with the provisions of Table 7.
Flange stop diameter
130~230
>230~250
Radial and end face runout tolerance
The parallelism tolerance of the motor axis to the foot support surface and the flatness tolerance of the foot support surface shall comply with the provisions of Table 8. 3.8.5
Frame size
80~112
132~160
Parallelism tolerance
The symmetry tolerance of the chain groove on the motor shaft extension shall comply with the provisions of Table 9. Table 9
Keyway width
Symmetry tolerance
4 Technical requirements
Flatness 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. 4.1
4.2The motor shall be able to operate at rated speed under the following conditions of altitude, ambient air temperature and relative humidity of ambient air. 4.2.1Altitude shall not exceed 1000m.
JB/T6448-1992
The maximum ambient air temperature varies with the seasons, but shall not exceed 40°C. 4.2.2
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°C, it shall comply with the provisions of GB755. The minimum ambient air temperature is -15°C.
The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.2.4
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. 4.3
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
Note: The efficiency is calculated based on stray losses at 0.5% of the input power. 4.5
Synchronous speed, r/min
Power factor co%p
At rated voltage, the guaranteed value of the ratio of the motor's stall torque and maximum torque to the rated torque is 2.4 times for 4 poles and 2.2 for 6 poles. At rated voltage, the guaranteed value of the minimum torque during the motor's starting process is 0.5 times the guaranteed value of the stall torque. The guaranteed value of the motor's static braking torque shall comply with the provisions of Table 11. Table 11
Synchronous speed, T/min
Static braking torque, N·m
JB/T6448-1992
At rated voltage, the guaranteed value of the ratio of the motor's stall current to the rated current shall comply with the provisions of Table 12. Table 12
Speed.r/min
Stalled rotor current/rated current
When the terminal voltage of the motor is 90% of the rated value and the second air gap (gap between the magnet and the armature) value is not greater than 1mm, the motor should be able to start normally.
The no-load braking time of the motor should not be greater than the provisions of Table 13. Table 13
The tolerance of the guaranteed value of the motor electrical performance should comply with the provisions of Table 14. Table 14
Electrical performance name
Power factor cos
Locked-rotor torque
Maximum torque
Locked-rotor current
Static braking torque
No-load braking time, $
0.15(1—7)
（1—C05)/6Minimum-0.02
-15% of guaranteed value
-10% of guaranteed value
-15% of guaranteed value
+20% of guaranteed value
-15% of guaranteed value
The motor adopts Class B insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (resistance method) is 80K; the allowable temperature of the bearing (thermometer method) should not exceed 95℃. 8
JB/T6448-1992
If the altitude or ambient air temperature of the test site is different from that specified in Article 4.2, the temperature rise limit shall be amended in accordance with the provisions of GB755. 4.13
The motor shall be able to withstand the maximum torque value specified in Article 4.5 (including tolerance) for 15 seconds without sudden change in speed, stoppage or harmful deformation under hot conditions and gradually increasing torque. At this time, the voltage and frequency shall be maintained at the rated value. 4.14
The motor shall be able to withstand an increase in speed to 120% of its rated value for 2 minutes without harmful deformation under no-load conditions. The insulation resistance of the motor stator winding shall not be less than 0.38MA in hot conditions or after the temperature rise test. The stator winding of the motor shall be able to withstand a withstand voltage test lasting 1 minute without breakdown. The frequency of the test voltage is 50Hz and it shall be a sine wave as much as possible. The effective value of the voltage is 1760V. When inspecting and testing motors produced in large quantities on conveyor belts, the test time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V.
The stator winding of the motor should be able to withstand the interval impulse withstand voltage test without breakdown, and its test limit is in accordance with the specification of JB/Z346. 4.18
8After the stator winding of the motor is tested for 6 cycles according to the 40C alternating damp heat test method specified in GB12665, the insulation resistance should not be less than 0.38M2, and it should be able to withstand the withstand voltage test specified in Article 4.16 without breakdown, but the effective value of the voltage is 1500V.
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 should not be greater than 10% of the three-phase average value.
When inspecting and testing the motor, the no-load and locked-rotor currents and losses should be within a certain data range, which should ensure that the motor performance meets the provisions of Articles 4.4 to 4.11. 4.21
The motor has a cylindrical shaft extension. If the two parties agree otherwise, the motor can be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but can only be driven by a coupling.
The effective value of the vibration velocity measured when the motor is unloaded should not exceed 1.8mm/s. The noise value of the A-weighted sound power level measured when the motor is unloaded should not exceed the provisions of Table 15. Table 15
Note: The tolerance of the noise value in the table is +3dB(A). 4.24
The unevenness of the air gap of the motor should not be greater than the provisions of Table 16. Step
Sound power level dB(A)
In the table:. —Nominal value of air gap;
—Unevenness value. It is defined as:
2/3880
In the formula; 3.82, 6—Air gap value measured at 120°. JB/T 6448-1992
4.25 The motor should be made with six outlet terminals. When viewed from the main shaft extension end, the motor terminal box should be placed on the right side of the base. If the two parties agree otherwise, the terminal box is allowed to be placed on the left side of the base. There should be a grounding terminal in the motor terminal box, 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. 4.26 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 clockwise when viewed from the main shaft extension end.
4.27 Each accumulator of the motor should have anti-loosening measures. 3 The shaft extension flat key of the motor, the operating and maintenance instructions (at least one copy is provided for a batch of motors of the same type as the user) and the product certificate should be provided to the user together with each motor. 4.28
When the motor is in the power-off braking state and the brake is in the released state, the motor should be able to rotate flexibly. Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. Each motor should undergo inspection and testing, and the inspection and test items include: a.
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator winding to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of Article 4.15); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss;
Note: It is necessary to measure the no-load characteristic curve during the type test. g
Measurement of the blocked rotor current and loss;
Note: It is necessary to measure the blocked rotor characteristic curve during the type test. h.
Noise measurement (according to the provisions of Article 5.6): vibration measurement (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 identification and finalization; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors should be regularly sampled and tested once a year. The type test items of the motor include:
All items of the inspection test;
Temperature rise test;
Efficiency and power factor measurement;
Short-time over-torque test;02
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value -15%
Guaranteed value +20%
Guaranteed value -15%
The motor adopts Class B insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (resistance method) is 80K; the allowable temperature of the bearing (thermometer method) should not exceed 95℃. 8
JB/T6448-1992
If the altitude or ambient air temperature of the test site is different from that of Article 4.2, the temperature rise limit should be revised according to the provisions of GB755. 4.13
The motor should be able to withstand the maximum torque value specified in Article 4.5 (including tolerance) for 15s without sudden change of speed, stoppage and harmful deformation in the hot state and under the condition of gradually increasing torque. At this time, the voltage and frequency should be maintained at the rated value. 4.14
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. The insulation resistance of the motor stator winding should not be less than 0.38MA in the hot state or after the temperature rise test. The stator winding of the motor should be able to withstand a withstand voltage test lasting 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. When inspecting and testing a large number of motors produced continuously on a conveyor belt, the test time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V.
The stator winding of the motor shall be able to withstand the interval impulse withstand voltage test without breakdown. The test limit shall be in accordance with the specification of JB/Z346. 4.18
8After the stator winding of the motor is tested for 6 cycles according to the 40C alternating damp heat test method specified in GB12665, the insulation resistance shall not be less than 0.38M2, and it shall be able to withstand the withstand voltage test specified in Article 4.16 without breakdown, but the effective value of the voltage is 1500V.
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 be greater than 10% of the average value of the three phases.
When the motor is inspected and tested, the no-load and locked-rotor currents and losses shall be within a certain data range, which shall ensure that the motor performance meets the provisions of Articles 4.4 to 4.11. 4.21
The motor has a cylindrical shaft extension. If the two parties agree otherwise, the motor can be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but can only be driven by a coupling.
The effective value of the vibration velocity measured when the motor is unloaded should not exceed 1.8mm/s. The noise value of the A-weighted sound power level measured when the motor is unloaded should not exceed the provisions of Table 15. Table 15
Note: The tolerance of the noise value in the table is +3dB(A). 4.24
The unevenness of the air gap of the motor should not be greater than the provisions of Table 16. Step
Sound power level dB(A)
In the table:. —Nominal value of air gap;
—Unevenness value. It is defined as:
2/3880
In the formula; 3.82, 6—Air gap value measured at 120°. JB/T 6448-1992
4.25 The motor should be made with six outlet terminals. When viewed from the main shaft extension end, the motor terminal box should be placed on the right side of the base. If the two parties agree otherwise, the terminal box is allowed to be placed on the left side of the base. There should be a grounding terminal in the motor terminal box, 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. 4.26 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 clockwise when viewed from the main shaft extension end.
4.27 Each accumulator of the motor should have anti-loosening measures. 3 The shaft extension flat key of the motor, the operating and maintenance instructions (at least one copy is provided for a batch of motors of the same type as the user) and the product certificate should be provided to the user together with each motor. 4.28
When the motor is in the power-off braking state and the brake is in the released state, the motor should be able to rotate flexibly. Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. Each motor should undergo inspection and testing, and the inspection and test items include: a.
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator winding to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of Article 4.15); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss;
Note: It is necessary to measure the no-load characteristic curve during the type test. g
Measurement of the blocked rotor current and loss;
Note: It is necessary to measure the blocked rotor characteristic curve during the type test. h.
Noise measurement (according to the provisions of Article 5.6): vibration measurement (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 identification and finalization; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors should be regularly sampled and tested once a year. The type test items of the motor include:
All items of the inspection test;
Temperature rise test;
Efficiency and power factor measurement;
Short-time over-torque test;02
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value -15%
Guaranteed value +20%
Guaranteed value -15%
The motor adopts Class B insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, the temperature rise limit of the motor stator winding (resistance method) is 80K; the allowable temperature of the bearing (thermometer method) should not exceed 95℃. 8
JB/T6448-1992
If the altitude or ambient air temperature of the test site is different from that of Article 4.2, the temperature rise limit should be revised according to the provisions of GB755. 4.13
The motor should be able to withstand the maximum torque value specified in Article 4.5 (including tolerance) for 15s without sudden change of speed, stoppage and harmful deformation in the hot state and under the condition of gradually increasing torque. At this time, the voltage and frequency should be maintained at the rated value. 4.14
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. The insulation resistance of the motor stator winding should not be less than 0.38MA in the hot state or after the temperature rise test. The stator winding of the motor should be able to withstand a withstand voltage test lasting 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. When inspecting and testing a large number of motors produced continuously on a conveyor belt, the test time is allowed to be shortened to 1s, and the effective value of the test voltage is 2110V.
The stator winding of the motor shall be able to withstand the interval impulse withstand voltage test without breakdown. The test limit shall be in accordance with the specification of JB/Z346. 4.18
8After the stator winding of the motor is tested for 6 cycles according to the 40C alternating damp heat test method specified in GB12665, the insulation resistance shall not be less than 0.38M2, and it shall be able to withstand the withstand voltage test specified in Article 4.16 without breakdown, but the effective value of the voltage is 1500V.
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 be greater than 10% of the average value of the three phases.
When the motor is inspected and tested, the no-load and locked-rotor currents and losses shall be within a certain data range, which shall ensure that the motor performance meets the provisions of Articles 4.4 to 4.11. 4.21
The motor has a cylindrical shaft extension. If the two parties agree otherwise, the motor can be made into two shaft extensions. The second shaft extension should be able to transmit the rated power, but can only be driven by a coupling.
The effective value of the vibration velocity measured when the motor is unloaded should not exceed 1.8mm/s. The noise value of the A-weighted sound power level measured when the motor is unloaded should not exceed the provisions of Table 15. Table 15
Note: The tolerance of the noise value in the table is +3dB(A). 4.24
The unevenness of the air gap of the motor should not be greater than the provisions of Table 16. Step
Sound power level dB(A)
In the table:. —Nominal value of air gap;
—Unevenness value. It is defined as:
2/3880
In the formula; 3.82, 6—Air gap value measured at 120°. JB/T 6448-1992
4.25 The motor should be made with six outlet terminals. When viewed from the main shaft extension end, the motor terminal box should be placed on the right side of the base. If the two parties agree otherwise, the terminal box is allowed to be placed on the left side of the base. There should be a grounding terminal in the motor terminal box, 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. 4.26 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 clockwise when viewed from the main shaft extension end.
4.27 Each accumulator of the motor should have anti-loosening measures. 3 The shaft extension flat key of the motor, the operating and maintenance instructions (at least one copy is provided for a batch of motors of the same type as the user) and the product certificate should be provided to the user together with each motor. 4.28
When the motor is in the power-off braking state and the brake is in the released state, the motor should be able to rotate flexibly. Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. Each motor should undergo inspection and testing, and the inspection and test items include: a.
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator winding to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of Article 4.15); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss;
Note: It is necessary to measure the no-load characteristic curve during the type test. g
Measurement of the blocked rotor current and loss;
Note: It is necessary to measure the blocked rotor characteristic curve during the type test. h.
Noise measurement (according to the provisions of Article 5.6): vibration measurement (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 identification and finalization; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors should be regularly sampled and tested once a year. The type test items of the motor include:
All items of the inspection test;
Temperature rise test;
Efficiency and power factor measurement;
Short-time over-torque test;25 The motor should be made with six outlet terminals. When viewed from the main shaft extension end, the motor terminal box should be placed on the right side of the base. If the two parties agree otherwise, the terminal box is allowed to be placed on the left side of the base. There should be a grounding terminal in the motor terminal box, and a grounding mark should be set near the grounding terminal. This mark should be guaranteed to be difficult to erase during the entire service life of the motor. 4.26 When the letter sequence of the terminal mark is the same as the voltage phase sequence direction of the three-phase power supply, the motor should rotate clockwise when viewed from the main shaft extension end.
4.27 Each accumulator of the motor should have anti-loosening measures. 3 The motor shaft extension flat key, the operating and maintenance instructions (at least one copy is provided for a batch of motors of the same type as the user) and the product certificate should be provided to the user together with each motor. 4.28
When the motor is in the power-off braking state and the brake is in the released state, the motor should be able to rotate flexibly. Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. Each motor should undergo inspection and testing, and the inspection and test items include: a.
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator winding to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of Article 4.15); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss;
Note: It is necessary to measure the no-load characteristic curve during the type test. g
Measurement of the blocked rotor current and loss;
Note: It is necessary to measure the blocked rotor characteristic curve during the type test. h.
Noise measurement (according to the provisions of Article 5.6): vibration measurement (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 identification and finalization; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors should be regularly sampled and tested once a year. The type test items of the motor include:
All items of the inspection test;
Temperature rise test;
Efficiency and power factor measurement;
Short-time over-torque test;25 The motor should be made with six outlet terminals. When viewed from the main shaft extension end, the motor terminal box should be placed on the right side of the base. If the two parties agree otherwise, the terminal box is allowed to be placed on the left side of the base. There should be a grounding terminal in the motor terminal box, and a grounding mark should be set near the grounding terminal. This mark should be guaranteed to be difficult to erase during the entire service life of the motor. 4.26 When the letter sequence of the terminal mark is the same as the voltage phase sequence direction of the three-phase power supply, the motor should rotate clockwise when viewed from the main shaft extension end.
4.27 Each accumulator of the motor should have anti-loosening measures. 3 The motor shaft extension flat key, the operating and maintenance instructions (at least one copy is provided for a batch of motors of the same type as the user) and the product certificate should be provided to the user together with each motor. 4.28
When the motor is in the power-off braking state and the brake is in the released state, the motor should be able to rotate flexibly. Inspection rules
Each motor must pass the inspection before leaving the factory, and a product certificate should be attached. Each motor should undergo inspection and testing, and the inspection and test items include: a.
Mechanical inspection (according to the provisions of Articles 5.5 and 5.6); measurement of the insulation resistance of the stator winding to the housing and between the windings (the cold insulation resistance can be measured during the inspection test, but the hot insulation resistance should be guaranteed not to be lower than the provisions of Article 4.15); c.
Measurement of the DC resistance of the stator winding in the actual cold state; withstand voltage test;
turn-to-turn insulation test;
Measurement of no-load current and loss;
Note: It is necessary to measure the no-load characteristic curve during the type test. g
Measurement of the blocked rotor current and loss;
Note: It is necessary to measure the blocked rotor characteristic curve during the type test. h.
Noise measurement (according to the provisions of Article 5.6): vibration measurement (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 identification and finalization; when the changes in the motor design or process are sufficient to cause changes in certain characteristics and parameters; when there is an unacceptable deviation between the inspection test results and the previous type test results; batch-produced motors should be regularly sampled and tested once a year. The type test items of the motor include:
All items of the inspection test;
Temperature rise test;
Efficiency and power factor measurement;bzxZ.net
Short-time over-torque test;
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