JB/T 5274-1991 Y series (IP44) three-phase asynchronous motor technical conditions (frame number 355)

This standard specifies the type, basic parameters and dimensions, technical requirements, test methods and inspection rules of electric motors, as well as marking and packaging requirements. JB/T 5274-1991 Y series (IP44) three-phase asynchronous motor technical conditions (frame number 355) JB/T5274-1991 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Y series (IP44) three-phase asynchronous motor
Technical conditions
(Frame number 355)
1 Subject content and scope of application| |tt||JB 5274- 91
This standard promotes the motor type, basic parameters and dimensions, technical requirements, inspection rules, and marking and packaging requirements. This standard applies to Y series (IP41) 355mm frame size squirrel cage rotor with heat dissipation ribs - general purpose phase asynchronous motor (hereinafter referred to as the motor). All varieties derived on the basis of this series can also be implemented by reference. 2 Reference standards
Basic technical requirements for rotating motors
CGB755
GB4942.1 Motor shell protection classification
GB1993
GB 997
Motor Cooling method
Motor structure and installation type code
GB 4772.1
GB12665
GB 10068
GB 10069
GB 1032||tt GB191 | Limit values
Measurement method and limit value of rotating electrical machine noise
Test method for three-phase asynchronous motor
Packaging, storage and transportation pictorial mark
JB/Z294
AC low-voltage motor scattered embedded winding turns insulation test method JB/Z 346:
AC low-voltage motor scattered embedded winding turns insulation test limits 3 types, basic parameters and dimensions
3.1 Motor shell protection The grade is IP44 (see GB4942.1). 3.2 The cooling method of the motor is IC0141 (GB1993). 3.3 The structure and installation type of the motor are IMB3, IMB35, and IMV1 (see GB997). 3.4 The motor rating is a continuous rating based on the continuous working system (S1). 3.5 The rated frequency of the motor is 50Hz and the rated voltage is 380V. 3.6 The motor should be manufactured according to the following rated power: 90, 110, 132, 160, (185), 200, (220), 250, (280), 315kW. Note: The power in brackets is not recommended. Users can negotiate with the manufacturer if needed. 3.7 The correspondence between the motor’s frame number, speed and power is as specified in Table 1. The Ministry of Mechanical and Electronic Industry of the People's Republic of China approved 208
1992-07-01 on 1991-06-28 for implementation
machine
355L| |tt||Dimensions and tolerances of 3.8 motors
JB 5274--91
Table 1
(280 )
speed,
(185)||tt| |200
160|| tt||(185)
3.8.1 The installation dimensions and tolerances of the motor shall comply with the provisions of Table 2 to Table 5. Not subject to the requirements of Table 2 and Table 5: 2
JB5274
5701089
aHa|| tt||O1
2s8||tt| |20
difference
difference
0S 0-
os℃+
install
1E0'0+
difference
extreme||tt ||D
Li Bao|| tt||Chebao
o1～f
WSS| |tt||number
base number
difference| |tt||public
awarded
installation
idH||tt ||V
荺||tt| |Extremely biased
Basic size
Limited rubbing
Extremely biased
Korean time
Basic size
Basic Ruler
Limited rubbing
Extremely partial
Original size
Basic ruler
Fake extraction
Partial
Body|| tt||base ruler
base inch
base ruler
number
fate number
machine Seat number
5|| tt||s
11o°0+
public
shares
JB5274
z|| tt||tu
Number of connections
08|| tt||difference
三089
foot||tt ||Device
212||tt| |JB527491
The dimensions and tolerances of the motor shaft extension key should comply with the provisions of Table 5. 3.8.2
Table 5
Extension
Straight
Diameter||tt| |key
3.8.3. The radial circular runout tolerance at half the shaft extension length should comply with the requirements in Table 6. Table 6
Shaft diameter
quotient
Tolerance|| tt||circle
moving
3.8.4 flange stop to the motor axis The radial circular runout tolerance and the end face circular runout tolerance of the flange mating surface on the motor axis are 0.16mm.
3.8.5 The parallelism tolerance of the motor axis to the foot supporting surface is 1mm. 3.8.6 The flatness tolerance of the motor foot supporting surface is 0.30mm. 3.8.7 The symmetry tolerance of the keyway on the motor shaft extension is 0.05mm. 4 Technical requirements
4.1 The electric 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 should be capable of rated operation under the following altitude, ambient temperature and relative humidity conditions. 4.2.1 The altitude does not exceed 1000m.
4.2.2 The maximum ambient air temperature does change with the seasons, but does not exceed 40C. Note: If the motor is used at an altitude of more than 1000m or when the maximum ambient air temperature is higher or lower than 10C, the regulations of (F755) should be followed. 4.2.3 The minimum ambient air temperature is -15℃. 4.2.4 The wettest month The monthly average maximum relative humidity is 90%, and the monthly average minimum humidity is not higher than 25C. 4.3 During the operation of the motor, the deviation of the power supply voltage and frequency from the rated value shall be in accordance with the provisions of (GB755). 4.4 When the power, voltage and frequency are rated. When the motor efficiency and power factor are guaranteed, the efficiency shall be measured by the closed indirect method as specified in the table, and the stray loss shall be calculated as 0.5% of the rated input 213
kw||tt. ||Rate
(220)| |tt||250
94.7| |tt||95.0
effective
1 000|| tt||Rate
JB5274—91
Table 7| |tt||Interstep
turn|| tt||93.0
speed, r/min
0.87||tt| |1000
Because
number,
Under the rated voltage, the guaranteed value of the ratio of motor stall torque to rated torque should comply with the provisions of Table 8, Table 8
90||tt| |110
(280)
Same as
turn|| tt||1000
speed+r/min
locked rotor torque/rated torque
1. 3||tt ||750
. 8!|tt||60
1.2| |tt||4.6 Under the rated voltage, the guaranteed value of the ratio of the minimum torque to the rated torque during the starting process of the motor should comply with the ship chain 214 in Table 9
.78||tt ||work
(185)||tt ||200
0.71| |tt||0.71
JB5274-91
Table 9
Same as
speed·r/min
minimum torque/amount Turn short
4.7 At rated voltage, the motor maximum The guaranteed value of the ratio of torque to rated torque is 2.2 times for synchronous speeds of 1500r/min and above, and 2.0 times for the rest.
Under rated voltage, the guaranteed value of the ratio of motor locked-rotor current to rated current should comply with the provisions of Table 10. 4.8
Table 10
3000|| tt||6.9
6.8||tt| |6.9
Same as
speed, r/min
stall current /Rated current
Note: When calculating the ratio of locked rotor current to rated current , the rated current used should be calculated according to the rated power, rated voltage and guaranteed values ??of efficiency and power factor (excluding extreme tolerances
4.9 The tolerance of the guaranteed value of the electrical performance of the motor should comply with the provisions of Table 11. 215| |tt||item
number
efficiency
rate()
power factor (co)
Locked-rotor torque
Minimum torque
Maximum torque
Locked-rotor current
Weighing
JB5274- 91
Table 11
-0. 10(1-7)
Capacity
—(1-cost)/6 at least -0.02
Difference
15% of the guaranteed value, +25% (positive tolerance is only specified when the user needs it)
-15% of the guaranteed value
10% of the guaranteed value 10%
10% of guaranteed value
4.10 When the altitude and ambient air temperature comply with the provisions of Article 4.2, if the motor adopts Class B insulation, the overflow limit of the stator winding (resistance method) is 80K, and if Class F insulation is used, it is 105K. The allowable temperature of the bearing (thermometer) method) should not exceed 95C. If the altitude or ambient air overflow of the test site is different from the provisions of Article 4.2, the temperature rise limit shall be revised according to the provisions of GB755. 4.11 The assessment of accidental overcurrent of the motor should be in accordance with the relevant regulations of GB755. 4.12 The motor should be able to withstand the maximum rotational speed specified in Article 4.7 of this standard (taking into account the tolerance) in a thermal state and with gradually increasing torque for 15 seconds without sudden rotation speed, stalling and harmful deformation. At this time, the voltage and frequency should be maintained at the rated values. If it is limited to equipment, it is allowed to measure the stator current instead of the torque measurement during the test. At this time, the stator current should be equal to 1.1 times the corresponding over-torque multiple times the rated current value.
4.13 The motor should be able to withstand increasing the speed to 120% of its rated value for 2 minutes without causing harmful deformation under no-load conditions. 4.14 The insulation resistance of the stator winding of the motor should not be less than 0.38M0 in the thermal state or after the temperature rise test. 4.15 The stator winding of the motor should be able to withstand a 1-min withstand voltage test without breakdown. The frequency of the test electric music is 50H2, the waveform is as sinusoidal as possible, and the effective value of the voltage is 1760V. This test should not be repeated for the same motor. If the user requests it, it is allowed to conduct another test on the construction site before starting operation after installation. The test should be in accordance with the relevant provisions of GB755. 4.16 The stator winding of the motor should be able to withstand the inter-turn impact voltage test without breakdown. When the motor uses scattered windings, the test impulse voltage peak value and test force method shall comply with the provisions of JB/Z346 and JB/Z294. When the motor uses formed windings, a short-term elevated voltage test can be performed. The test is carried out when the motor is no-load, the external voltage is 130% of the rated voltage, and the time is 3 minutes. When increasing the voltage value to 130% of the rated voltage, it is allowed to increase the frequency or speed at the same time, but it should not exceed 115% of the rated value. 4.17 After 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 0.38MQ, and it should be able to withstand the withstand voltage test specified in Article 4.15 without breakdown. However, The effective value of the voltage is 1500V4.18 The effective value of the vibration speed of the motor at no load should not exceed 4.5mm/s for a synchronous speed of 3000r/min; for a synchronous speed of 1500r/min and below, the level 1 should not exceed 2.8mm /s, level 2 should not exceed 4.5mm/s. 9. The noise value of the A-weighted sound power level measured when the motor is no-load should not exceed the requirements in Table 12. 4.19
Table 12
>55~110
>110~220
> 220～315
Same as
speed, r/min
99||tt ||Go0
4.20 When the three-phase power supply is balanced, the deviation of any one phase of the motor's blue phase no-load current from the average value of the two phases should not be greater than that of the two phases. 10% of the average. bZxz.net
4.21 The motor is not allowed to be reversely connected to the power supply for reversal or braking during operation. The alphabetical order of the signs on the outlet terminal is consistent with the voltage of the three consumption sources 216
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