JB/T 6202-1992 Technical Specifications for Flameproof Three-Phase Asynchronous Motors for YBF Series Fans (Frame Size 63～160)
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Flameproof Three-phase Asynchronous Motors for YBF Series Fans (Frame Size 63~160) 1 Subject Content and Scope of Application
JB6202-1992
This standard specifies the type, basic parameters and dimensions, test methods and inspection rules, as well as the requirements for marking and packaging of flameproof three-phase asynchronous motors for YBF series fans.
This standard applies to 0.1218.5kW YBF series flameproof three-phase asynchronous motors for fans (hereinafter referred to as motors), and all series of motors derived from this series of motors can also refer to it. The explosion-proof performance of this series of motors complies with the provisions of GB3836.2 and is made into flameproof type. The explosion-proof marks are dI, dIAT4, and dIBT4, respectively, and are suitable for places where explosive mixtures of combustible gas or steam and air are formed in coal mines and factories of IA level, IB level, and temperature groups of T1~T4.
2 Reference standards
GB1993
GB1032
General requirements for explosion-proof electrical equipment for explosive atmospheres Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment "d" motor housing protection classification
Motor cooling method
Motor structure and installation type code
Motor dimensions and tolerances Motors with frame size 36 to 400 flange number FF55 to FF1080 or FT55 to FT1080 Basic technical requirements for rotating motors
Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test method Test method for three-phase asynchronous motors
GB10068.1
Vibration measurement method and limit for rotating motors
Vibration measurement method Method
GB10069.11
Determination method and limit of noise of rotating motors Engineering determination method of noise JB/Z294
JB/Z346
GB2900.25
GB2900.35
GB4831
Test method of inter-turn edge of AC low-voltage motor loose-embedded windings Test limit of inter-turn edge of AC low-voltage motor loose-embedded windings Packaging storage and transportation pictorial symbols
Electrical terminology Motor
Electrical terminology Explosion-proof electrical equipment for explosive atmospheres Method for compiling motor product models
3 Type, basic parameters and dimensions
3.1 The protection level of the motor main housing is IP44, and the junction box is IP54 (see GB4942.1). 3.2 The cooling method of the motor under working condition is IC0141 (see GB1993). 3.3 The structure and installation type of the motor is IMB30. 3.4 The motor rating is a continuous rating based on the continuous duty system (S1). Approved by the Ministry of Machinery and Electronics Industry on June 16, 1992 and implemented on January 1, 1993
JB6202-1992
The rated frequency of the motor is 50Hz, the rated voltage is 380, 660V, and it can be made into 380/660V according to user needs. The motor should be manufactured according to the following rated power: 0.12, 0.18, 0.25, 0.37, 0.55, 0.75, 1.1, 1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5kW The corresponding relationship between the motor frame number and the speed and power should be as specified in Table 1. Table 1
Electric motor dimensions and tolerances
Core code
3.8.1The installation dimensions and tolerances of the motor shall comply with the provisions of Table 2, and the overall dimensions shall not exceed those specified in Table 2. 78
JB6202—1992
(06)08
(68)92
180 in
JB6201—1992
The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 3 Table 3
Shaft extension diameter
The radial runout tolerance at half the length of the motor shaft extension shall comply with the provisions of Table 4. Table 4
Shaft extension diameter
>18~30
>30~50
The symmetry tolerance of the symmetric center line of the motor shaft extension keyway shall comply with the provisions of Table 5. Table 5
Technical requirements
Circular runout
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 values under the following ambient air temperatures and ambient air relative humidity conditions at the following altitudes. 4.2.1 The altitude shall not exceed 1000m.
4.2.2 The maximum ambient air temperature shall vary with the seasons but shall not exceed 40°C. High
Note: If the motor is specified to be used at an altitude exceeding 1000m or the maximum ambient air temperature is higher or lower than 40°C, it shall comply with the provisions of GB755. 4.2.3 The minimum ambient air temperature shall be -15°C. 4.2.4 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°C. 4.3 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 frequency of the motor are rated, the guaranteed values of its efficiency and power factor shall comply with the provisions of Table 6. 4.4
JB6202—1992
Note: The efficiency is determined by the measured stray loss analysis method or the direct method. 86.0
Under the rated voltage, the guaranteed value of the minimum torque during the motor starting process shall not be less than the rated torque. The tolerance of the guaranteed value of the motor electrical performance shall comply with the provisions of Table 7. Table
Electrical performance name
Power factor cos
Minimum torque
0.15(1-n)
(1-cosg)/6Minimum 0.02
15% of the guaranteed value
The motor adopts Class B insulation. When the altitude and ambient air temperature meet the requirements of Article 4.2, and the motor is running at the minimum air volume within the specified operating range, the temperature rise limit of the stator winding (resistance method) shall not exceed 80K, the allowable temperature of the bearing (thermometer method) shall not exceed 95℃, and the maximum surface temperature of the housing (thermometer method) shall not exceed 130℃. If the altitude and ambient air temperature of the test site are different from those specified in Article 4.2, the temperature rise limit shall be revised in accordance with the provisions of GB755. 4.8
The motor shall be able to withstand an overspeed test of 1.2 times the rated speed for 2 minutes without harmful deformation when it is unloaded. The insulation resistance of the motor stator winding shall not be less than 0.38Ma (rated voltage is 380V) or 4.9
0.66MQ (rated voltage is 660V) when hot 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 test voltage is 1760V (rated voltage is 380V) or 2320V (rated voltage is 660V). When inspecting and testing a large number of motors produced continuously on a conveyor belt, the test time may be shortened to 1s. The effective value of the test voltage is 2110V (rated voltage is 380V) or 2780V (rated voltage is 660V). The stator winding of the motor shall not break down after the inter-corrugated impulse withstand voltage test in accordance with the provisions of JB/Z346. The peak value of the impulse test voltage shall comply with the provisions of Table 8, and the wavefront time of the impulse test voltage is 0.5μs. Table 8
63~100
>100~160
4.12 After the stator winding of the motor is tested for 12 cycles according to the 40℃ alternating damp heat test method specified in GB2423.4, its insulation resistance should not be less than 1.14Ma (rated voltage is 380V) or 1.98Mα (rated voltage is 660V), and it should be able to withstand the voltage withstand test specified in Article 4.10, the effective value of the voltage is 1500V (rated voltage is 380V) or 1970V (rated voltage is 660V) without breakdown, and the flameproof surface of the sample should not be corroded. 4.13
The effective value of the vibration velocity measured when the motor is no-load shall not exceed the provisions of Table 9. Table 9
63~132
1500 and below
The noise limit of the A-weighted sound power level measured when the motor is no-load shall not exceed the provisions of Table 10. Table 10
JB6202—1992
Continued Table 10
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 value.
When the motor is inspected and tested, the no-load current and loss shall be within a certain data range, which shall ensure that the motor performance meets the provisions of Sections 4.4 to 4.6 of this standard. 4.17
The unevenness of the air gap of the motor shall not exceed the provisions of Table 11. Table 11
In the table: -
Nominal value of air gap
Not average value, which is defined as:
V+++8++8
Where: 8, 82, 8 are the air gap values measured at 120° apart. The motor has a cylindrical shaft extension, and the fan is directly installed on the shaft extension. 4.18
4.19The junction box of the motor is located on the end cover of the non-shaft extension end of the motor. The wire is introduced in the radial (axial) direction and is made into three terminals, which are suitable for rubber-sheathed cables. According to user needs, six terminals can also be made. A grounding screw must be set in the motor housing and the junction box, and a grounding mark "Gu" should be set near the grounding screw. This mark should ensure that it is not easy to erase during the entire service period of the motor. 4.20When the alphabetical sequence of the mark on the outlet is the same as the voltage phase sequence direction of the three-phase power supply, the motor should rotate clockwise when viewed from the shaft extension end.
4.21 The shaft extension key, instruction manual (at least one copy for a batch of motors of the same type for the same user) and product certificate of conformity shall be provided to the user together with each motor.
4.22 If the user uses and stores the motor correctly according to the provisions of the instruction manual, the manufacturer shall ensure that the motor can operate well within one year of use, but not more than two years from the date of shipment from the manufacturer. If the motor is damaged or fails to work properly due to poor manufacturing quality within this specified time, the manufacturer shall repair or replace parts or motors for the user free of charge. 5 Inspection rules
5.1 The motor shall obtain an "explosion-proof certificate" issued by the explosion-proof inspection unit. 5.2 Each motor shall be inspected and qualified before leaving the factory, and shall be accompanied by a product certificate of conformity. 5.3 Each motor shall be inspected and tested. The inspection and test items include: a. Mechanical inspection (according to the provisions of Articles 5.8 and 5.9 of this standard); b. Determination of insulation resistance between stator winding and housing and between windings (cold insulation resistance can be measured during inspection and test, but it should be ensured that the insulation resistance in hot state is not lower than the provisions of Article 4.9 of this standard); determination of DC resistance of stator winding in actual cold state; c. Withstand voltage test; turn-to-turn insulation test, f. Determination of no-load current and loss: Note: During type test, it is necessary to measure the no-load characteristic curve and noise measurement (according to the provisions of Article 5.9 of this standard); g. Determination of vibration (according to the provisions of Article 5.9 of this standard). h. 5.4 In addition to Article 5.3, the inspection and test items of motors and their parts shall also include the inspection items specified in GB3836.2 in the drawings. 5.5 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 identification and finalization; b. 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; c. Regular sampling tests of motors produced in batches, once a year. When the number of sampling tests required is too large, the sampling interval can be appropriately extended, but at least once every two years. 5.6 The type test items of motors include: a. All items of inspection tests; temperature rise test, bearing temperature measurement; efficiency and power factor measurement; minimum torque measurement during starting; overspeed test; maximum surface temperature of the motor.
5.7 For any of the following situations, drawings and documents must be reviewed and explosion-proof performance tests must be conducted in accordance with the provisions of GB3836.2. a.
Products that have not obtained the "explosion-proof certificate"; b. For products that have obtained the "explosion-proof certificate", when the relevant regulations involving explosion-proof performance are changed locally, the drawings, documents and instructions of the changed parts should be sent to the original inspection unit for re-examination; c. When the inspection unit needs to re-examine the products that have been issued with the "explosion-proof certificate"; d. When the "explosion-proof certificate" expires.
5.8 The mechanical inspection items of the motor include: 3. Rotation inspection: When the motor rotates, it should be smooth and light, without stagnation. b. Appearance inspection: Check whether the motor is assembled completely and correctly, and the paint on the surface of the motor should be dry and complete, uniform and free of stains, damage, cracks, etc.
Installation dimensions, external dimensions and key dimensions inspection: The installation dimensions and external dimensions shall comply with the provisions of Article 3.8.1 of this standard, and the dimensions of the key c..
shall comply with the provisions of Article 3.8.2 of this standard. d. Inspection of circular runout and keyway symmetry: Circular runout shall comply with the provisions of Article 3.8.3 of this standard. Keyway symmetry shall comply with the provisions of Article 3.8.4 of this standard, and keyway symmetry is allowed to be inspected on parts. 5.9 Items a and b of Article 5.8 of this standard must be inspected for each unit. Items g and h of Article 5.3 and items c and d of Article 5.8 may be inspected on a spot basis, and the inspection method shall be formulated by the manufacturer.
5.10 The test methods for the various tests specified in Article 5.3 (except for items e, g and h) and Article 5.6 (except for item f) of this standard shall be carried out in accordance with GB1032, and item e of Article 5.3 shall be carried out in accordance with JB/Z294. Item g of Article 5.3 shall be carried out in accordance with GB10069.1. Item h of Article 5.3 shall be carried out in accordance with GB10068.1. Item f of Article 5.6 shall be carried out in accordance with GB3836.1. Item c and d of Article 5.8 shall be carried out in accordance with GB4772.1. 5.11 The test of motor housing protection level, 40℃ alternating damp heat test and air gap unevenness inspection may be carried out when the product structure is finalized or when there are major changes in structure and process. The test method of housing protection level shall be carried out in accordance with GB4942.1. During the test, the motor shall be in normal operation and anti-rust oil shall be applied on its flameproof surface. The 40℃ alternating damp heat test shall be carried out in accordance with GB2423.4. 6 Marking and packaging
6.1 The nameplate material and the method of engraving the data on the nameplate shall ensure that the writing is not easily erased during the entire service life of the motor. 6.2 The nameplate should be fixed in a conspicuous place on the motor base, and the items to be marked are as follows: a.
Manufacturer name:
Motor name (flameproof three-phase asynchronous motor for fan); Motor model;
Explosion-proof mark;
Standard number:
Enclosure protection grade;
Rated power;
Rated frequency:
Rated voltage;
Rated current;
Rated speed;
Insulation grade;
Noise limit;
Manufacturer's production year and month and production number: bzxz.net
Weight;
Explosion-proof certificate number;
Mark \Ex" (located in the upper right corner of the nameplate ). 6.3 The outlet terminals of the motor stator winding and the wiring devices in the terminal box should have corresponding markings, and the markings should be indelible during the entire service life of the motor. The markings should be in accordance with the provisions of Table 12. Table 12
Name of stator winding
First phase
Second phase
Third phase
6.4 The motor should be marked with a clear embossed mark "Ex" in a conspicuous place. Outlet terminal marking
6.5 The shaft extension flat key of the motor must be tied to the shaft. Anti-rust and protective measures should be taken on the surface of the shaft extension and flat key. 6.6 The packaging of the motor should be able to ensure that under normal storage and transportation conditions, it will not be damp and damaged due to poor packaging within one year from the date of shipment.
6.7 The packaging box must be firm and reliable, and the words and signs on the outer wall should be clear and neat, as follows: 85
Shipping station and manufacturer name;
Receiving station and receiving unit name;
Motor model and production number,
Net weight of the motor and gross weight of the box, box size;
JB6202—1992
The words "handle with care" and "afraid of moisture" should be marked in appropriate positions outside the box, and the graphics should comply with the provisions of GB191. Additional notes:
This standard was proposed and managed by the Nanyang Explosion-proof Electrical Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Nanyang Explosion-proof Electrical Research Institute, Wuhan Micro Motor Factory, Nanyang Explosion-proof Motor Factory, and Shanxi Explosion-proof Motor Factory. The main drafters of this standard are Ren Chunfa, Chen Xianhong, Lu Yuanchang, Xiang Suqin, Kang Guoli, and Zhu Xiuhua.
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