JB/T 6226-1992 Technical requirements for motors for fans of large thermal power equipment
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Electric Motors for Fans of Large Thermal Power Equipment Subject Content and Scope of Application
JB/T6226
This standard specifies the model, type, basic parameters, operating conditions, technical requirements, inspection rules, and marking and packaging requirements of electric motors.
This standard applies to three-phase cage asynchronous motors (hereinafter referred to as motors) for blowers, induced draft fans, primary fans and circulating fans of large thermal power equipment (single unit power of 200MW and above), and can also be used for other mechanical matching motors with similar traction characteristics. Any matters not specified in this standard shall comply with the relevant provisions of GB755. 2 Reference standards
GB4831
Method for reducing motor product model
Basic technical requirements for rotating motors
Motor housing protection classification
GB1993
Cooling method for rotating motors
Motor structure and installation type code
GB 4772.1
GB 4772.2
GB 10068.1
GB 10068.2
GB10069.2
GB10069.3
GB1971
GB1032
JB/Z293
GB 191
Motor dimensions and tolerancesMotors with frame sizes 36 to 400 and flange numbers FF55 to FF1080 or FT55 to FT1080Motor dimensions and tolerancesMotors with frame sizes 355 to 1000Determination methods and limits for vibration of rotating motors
Determination methods and limits for vibration of rotating motors
Determination methods and limits for noise of rotating motors
Determination methods and limits for noise of rotating motors
Motor terminal markings and rotation direction
Test methods for three-phase asynchronous motors
Determination methods for vibration
Vibration limits
Simple determination methods for noise
Noise limits
Stator winding interturn insulation test specifications for AC high-voltage motorsPackaging, storage and transportation graphic symbols
3Model, type, basic parameters and dimensions
Model description (according to the provisions of GB4831)
Environmental code|| tt||Specification code
Product code
Part 1 Product code
YFKK: Indicates air-cooled squirrel cage asynchronous motor for fans of thermal power equipmentYFSK: Indicates water-cooled squirrel cage asynchronous motor for fans of thermal power equipmentApproved by the Ministry of Machinery and Electronics Industry on June 16, 1992 and implemented on January 1, 1993
JB/T6226-92
YFQF: Indicates thermal power Climate-protected squirrel cage asynchronous motor for equipment fans Part 2 Specification code
Using center height (mm)--core length (digital code) number of poles to indicate Part 3 Environmental code
W: indicates outdoor (no W indicates indoor)
Example: YFKK800-2-8/10-W is an air-to-air cooling type cage asynchronous motor for thermal power equipment fans with center height of 800mm, core length of No. 2, 8 and 10 poles for outdoor use.
3.2 The motor housing protection level is IP44 (can also be designed and manufactured according to IP54 requirements) or IPW22.3.3
The motor cooling method is IC611, IC81W and IC31. The structure and installation type of the motor is IMB3 or IM7211. The motor rating is the maximum continuous rating based on the S1 duty system. Rated frequency: 50Hz.
Rated voltage: 6kV is generally used; 10kV can also be used according to user requirements. Rated power level:
400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120, 1250, 1400, 16001800, 2000, 2240, 2500, 2800, 3150, 3550, 4000, 4500, 5000kW. 3.9
Synchronous speed:
1500, 1000, 750, 600, 500r/min. 3.10 Center height:
355,400.450,500,560,630,710,800,900,1000mm3.11 The radial runout tolerance at half of the shaft extension length of the motor using rolling bearings shall comply with the provisions of Table 1. Table 1
Shaft extension diameter
>80~120
>120~180
>180~250
>250~315
Radial runout tolerance
3.12 The installation dimensions and tolerances of the motor shall comply with GB4772.1 and GB4772.2. The manufacturer shall indicate the installation dimensions of each specific specification in the corresponding documents.
4 Technical requirements
4.1 The motor shall be able to operate at rated speed under the following altitudes, ambient air temperature and relative humidity conditions. 4.1.1 The altitude shall not exceed 1000m.
4.1.2 The ambient air temperature at the operating location varies with the season, but the highest is 40°C and the lowest is -15°C. The lowest ambient temperature for motors using sliding bearings is 5°C. If the lowest ambient air temperature is lower than the above value, the temperature value shall be determined by negotiation between the user and the manufacturer. 4.1.3 The average maximum relative humidity of the wettest month at the operating location is 90%. At the same time, the average minimum temperature of the month shall not be higher than 25°C. 4.1.4 Motors using water-cooled coolers. The highest water temperature at the cooler inlet is 30°C and the lowest water temperature is 5°C. If it is higher than 30°C, the user shall negotiate with the manufacturer.
Note: If the motor is specified to operate at an altitude of more than 1000m or the ambient air temperature is higher than or lower than 40°C, the relevant provisions of GB755 shall be followed. 4.2 The motor stator adopts F-class insulation, and the temperature rise limit is assessed according to B-class. When the operating conditions are consistent with the content of Article 4.1, the temperature rise limit of the motor winding (using the resistance method) should not exceed 80K; the allowable temperature of the bearing (thermometer method): the rolling bearing should not exceed 95C, and the sliding bearing should not exceed 80C.
4.3 "The changes in power supply voltage and frequency during motor operation shall be in accordance with the provisions of (GB755. 474
JB/T6226···92
4.4 The guaranteed values of the efficiency and power factor of the motor are specified in the relevant documents of the manufacturer. 4.5 The efficiency of the motor is determined by the indirect method. When determining the total loss of the motor, the PR loss of the winding should be converted to the value at the reference operating temperature of Class B insulation; the stray loss is calculated as 0.5% of the rated input. 4.6. At rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque should not be less than 0.6. At rated voltage, the motor The guaranteed value of the ratio of the maximum torque to the rated torque of the motor shall not be less than 1.8. 4.7
Under rated voltage, the guaranteed value of the ratio of the motor's locked-rotor current to the rated current shall not be greater than that specified in Table 2. Table 2
Synchronous speed, r/min
Locked-rotor current/rated current
1500, 1000
The tolerance of the guaranteed value of the motor's electrical performance shall comply with the provisions of Table 3. Table 3
Efficiency (\)
Power factor (coss)
Locked-rotor torque
Maximum torque
Locked-rotor current
Motor's The dielectric property test shall comply with the provisions of GB755. Capacitance
-0.10(19)
750.600,500
（1-c05§)/6Minimum is —0.02
Maximum is —0.07
Guaranteed value -15%
Guaranteed value -10%
Guaranteed value +20%
The stator winding of the motor shall be able to withstand the inter-turn impulse withstand voltage test or short-time rise voltage test without breakdown. When conducting the inter-turn impulse withstand voltage test, the coil test impulse voltage peak value and test method shall comply with the provisions of JB/Z293; short The time-increasing voltage test is carried out when the motor is unloaded, with an external voltage of 130% of the rated voltage for 3 minutes. When the voltage value is increased to 130% of the rated voltage, the frequency or speed is allowed to be increased at the same time, but it should not exceed 115% of its rated value. 4.12
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 should not exceed the average value. The effective value of the vibration velocity measured when the motor is unloaded should not exceed 2.8mm/s as specified in GB10068.2. The noise value of the A-weighted sound power level measured when the motor is unloaded should be in accordance with GB10069.3. The motor needs to be equipped with a space heater with a voltage of 220V or 380V. 4.16 The stator winding of the motor is equipped with 6 embedded resistance temperature measuring elements with a graduation number of Pt100, and each bearing is equipped with a resistance temperature measuring element with a graduation number of Pt100.
The motor has a cylindrical shaft extension, and the shaft is not allowed to bear the external axial force and radial force other than the weight of the coupling. When the motor using sliding bearings adopts elastic connection, there should be an axial limit device on the coupling; the axial force should be negotiated with the manufacturer. 4.18 The number of outlet terminals of the motor and the orientation of the outlet box. 4.18.1 Single-speed motors should be made into 3 (differential protection is not required) or 6 (differential protection is required) outlet terminals. 2 Single-winding double-speed motors should be made into 6 (differential protection is not required) or 9 (differential protection is required) outlet terminals. 4.18-2
4.18.3 Double-winding dual-speed motors should be made with 6 (high and low speeds do not require differential protection) or 9 (high speeds only require differential protection) or 12 (high and low speeds both require differential protection) outlets. 4.18.4 Motors with power greater than or equal to 2000kW need differential protection; whether motors with power less than 2000kW need differential protection is determined by the user and the manufacturer.
4.18.5 From the shaft extension end, the main outlet box of the motor is located on the right side of the base. If the user has special requirements, they can negotiate with the manufacturer. The outlet terminal connected to the differential 475
protection can be on the same side or on the opposite side of the main outlet box. JB/T6226—92
4.19 When the alphabetical sequence marked on the outlet terminal is the same as the voltage phase sequence of the three-phase power supply, the motor should rotate clockwise when viewed from the shaft extension end; motors equipped with unidirectional fans should have permanent marks on the casing to indicate the direction of rotation. 4.20 The motor should have a reliable grounding device and a clear mark indicating grounding. This mark should be guaranteed not to fall off or wear out during the service life of the motor.
4.21 Motors with a center height of 710mm and above should have reliable measures to prevent shaft current. 4.22 When the motor leaves the factory, it should be randomly provided to the user with maintenance instructions, appearance drawings, electrical switch data, temperature measuring element layout drawings and product certificates.
4.23 If the user uses and stores the motor correctly according to the provisions of the manual, the manufacturer shall guarantee that it 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 cannot work normally due to poor manufacturing quality within the specified time, the manufacturer shall repair or replace the parts or motor for the user free of charge. 5 Starting and operation
5.1 Starting capacity
5.1.1 The motor should be able to start directly at the rated voltage, and the power grid should ensure that the motor terminal voltage is not less than 85% of the rated value during the starting process.
5.1.2 The load inertia allowed to be dragged by the motor should match the inertia of the fan driven. The matching of existing fans and motors is shown in Appendix A. The load torque during the acceleration process is shown in Figures 1 and 2; when the voltage and frequency meet the design requirements of the motor, it should be able to start in any of the ways described in 5.1.3.
Fan starting force characteristic curve
(Axial flow fan with adjustable blades)
Fan speed (%)
JB/T622692
Fan starting force characteristic curve
(Centrifugal fan)
Fan speed (%)
5.1.3 When the motor is cold, it can be started twice in succession at ambient temperature, and it should stop naturally between the two starts; when the motor is hot, it can be started once when its temperature does not exceed the steady-state temperature under rated load. 5.2 The motor is not allowed to reverse or brake when the power supply is reversed during operation. 6 Inspection rules and test methods
6.1 Each motor must pass the inspection before leaving the factory. 6.2 Each motor shall be inspected and tested. The inspection and test items include: a. Mechanical inspection (according to the provisions of Article 6.5 of this standard); measurement of insulation resistance between winding and housing and between windings (cold insulation resistance can be measured during inspection and test, but hot insulation resistance should still be guaranteed not lower than the provisions of GB755); c. DC resistance measurement of winding in actual cold state; withstand voltage test; turn-to-turn impulse withstand voltage test; short-time voltage rise test (if test e has been carried out, this test may not be carried out); no-load test; stall test; vibration measurement; overspeed test. Note: During type test, no-load characteristic curve and stall characteristic curve should be measured for g and h respectively. ：The motor type test items include:
All items of inspection test;
Temperature rise test:
Efficiency, power factor and slip rate determination; maximum torque determination;
Measurement of moment of inertia;
Noise determination.
And do not continue to read
JB/T6226-92
6.4 When conducting type test, the withstand voltage test of winding to housing and winding to winding shall be carried out immediately after the temperature rise test of the motor, and shall be carried out after the insulation resistance measurement of the winding. 6.5 The mechanical inspection items of the motor are:
Rotation inspection: When the motor is running, it should be balanced and light without stagnation; a.
and other phenomena;
Appearance inspection: Check whether the motor is assembled completely and correctly, the paint on the motor surface should be dry, even, without stains, damage, and cracks. Installation size and tolerance inspection;
Check the radial runout of the shaft extension of the rolling bearing. 6.6 The test of the protection level of the motor housing can be carried out only when the product structure is finalized or the structure and process have major changes. The test method of the housing protection level shall be carried out in accordance with GB4942.1.
6.7 The various tests specified in Article 6.2 (except e and i) and Article 6.3 (except f) of this standard shall be carried out in accordance with GB1032. Article 6.2 e may be carried out in accordance with JB/Z293 after the coil is offline and before the connection is made. Article 6.2 i shall be carried out in accordance with GB10068.1, Article 6.3 f shall be carried out in accordance with GB10069.2, and Article 6.5 c shall be carried out in accordance with GB4772.1 and GB4772.2. Marking, packaging
The nameplate and its data shall be guaranteed not to fall off or wear out during the service life of the motor. The nameplate should be fixed on a conspicuous position on the motor base, and the items to be marked are as follows; a.
Motor name:
Manufacturer name or factory name mark;
Product standard number;
Motor model:
Number of phases;
Rated frequency, Hz;
Rated power, kW;
Rated voltage, V;
Rated current, A;
Rated power factor;
Rated speed, t/min;
Insulation grade;
Wiring method:
Enclosure protection grade; (it is allowed to make a separate nameplate); Manufacturer's year and month of production and number;
Weight, kg
7.3 There should be corresponding markings on each output terminal of the motor stator winding and the wiring position on the terminal board, and ensure that the writing is not easily erased during the entire service life of the motor. The markings are as follows: a.
For the corresponding items in 4.18.1, see Table 4.
For 3 outlets
First phase
Second phase
Third phase
For the corresponding items in 4.18.2, see Table 5.
For 6 outlets
First phase
Second phase
Third phase
For the corresponding items in 4.18.3, see Table 6.
JB/T6226--92
For 6 outlets
6 outlets
First phase
Second phase
9 outlets
The shaft extension key of the motor must be tied to the shaft, and the shaft extension and the flat key surface must be rust-proof and protected. The packaging of the motor should be able to avoid moisture and damage during transportation. The words and logos on the outer wall of the packaging box should be clear and neat, and the contents are as follows: a.
Shipping station and manufacturer name;
Receiving station and receiving unit name:
Motor model and product number;
Motor net weight and gross weight with box; Box size;
9 outlet terminals
1V11V2
12 outlet terminals
“Handle with care” and “Moisture-proof” should be marked in appropriate positions of the box, and the graphics should comply with GB191 regulations. 2U1
JB/T6226-92
Appendix A
Existing fan and motor matching status table
(reference)
The existing fan and motor matching status is shown in Table A1. Table A1
Motor power
Motor synchronous speed
Fan type
936—1
M5--3611
M5—2911
M5—36--11
M5—29—11
M5-29—11
Ne,18D
Ne,20D
PAF13.3—8—2
ASN—1903/900
M5—29-11
AS1-1500/1000
G4-73—11
M53611
M5—36—11||tt| |ASN--1950/1000
ASN-2070/900
FAF18—9—1
1788AB/1060/9
M5-36-11
17674AZ/792
9—36-1N2.15
FAF20—1 0 — 1 | | tt | -1
AST-1792/1120
9-36—1
Ne.171/2D
Fan rotation inertia
Motor power
2000/1600
3 600/2 200
Motor synchronous speed
600/500
600/500
JB/T6226—92
Continued Table A1
Fan model
G4-73—12
Y4—73—11
FAF21.1 -11.2
Y52X53
ASN—2187/1250
FAF22. 4-12. 61
G473- 11 Ne.22D
FAF21.113. 3—1
FAF--25—12.5—1
FAF—23 .7-13. 3-1
FAF—22.415—1
ASN-2880/1600
ASN—2875/1250
SAF—2816—1
G473—12N2.25D
SAF—2816—1
ASN—2880/18 00
ASN—3000/2000
Y5—2X53
G4—73-14
G4-73-12||tt| |Y473—12
Y4—73—11
Y4-2X60
Y4×60
Y4-2×60
G4—73
Y4-2×60
G4—73-11
Y4-2×60
Y4—73—12
Y4—2X73
Y5-2X56
Y4—2×73
N2,37F
Be careful when the fan is running
14 775 | | tt | 0/560
1250/630
140Q/630
15 00/630
Additional instructions:
Motor synchronous speed
750/600
750/600
750/600
750/600
750/600
750/600
1000/750
1000/750|| tt | 4-73—14
G4—73—11
Y4—73—02
Y 4--61--02
Y4—6101
Y4—61—01
Y4--73-12
Y4-2×60
Y4—2×60
Y5—53
N2.311/2F
NO.291/2F||tt| |G4—73
Y4—2×73Ne,281/2F
Y4—71—01 N2.29F
Y4—73N.25F
G4—73—12N2.25F
G4—73
G473—11Ne.23D
This standard is proposed and managed by Harbin Large Electric Motor Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Harbin Large Electric Motor Research Institute, and the main drafters of this standard are Yang Chuanjin and Xi Yujun. 482
Moment of inertia of fan
kg·m?
3·938171/2D
Fan moment of inertia
Motor power
2000/1600
3 600/2 200
Motor synchronous speed
600/500
600/500
JB/T6226—92
Continued Table A1
Fan model
G4-73—12
Y4—73—11
FAF21.1 -11.2
Y52X53
ASN—2187/1250
FAF22. 4-12. 61
G473- 11 Ne.22D
FAF21.113. 3—1
FAF--25—12.5—1
FAF—23. 7—13. 3-1
FAF—22.415—1
ASN-2880/1600
ASN—2875/1250
SAF—2816—1
G473—12N2.25D
SAF—2816—1
ASN—2880/18 00
ASN—3000/2000
Y5—2X53
G4—73-14
G4-73-12||tt| |Y473—12
Y4—73—11
Y4-2X60
Y4×60
Y4-2×60
G4—73
Y4-2×60
G4—73-11
Y4-2×60
Y4—73—12
Y4—2X73
Y5-2X56
Y4—2×73
N2,37F
Be careful when the fan is running
14 775 | | tt | 0/560
1250/630
140Q/630
15 00/630
Additional instructions:
Motor synchronous speed
750/600
750/600
750/600
750/600
750/600
750/600
1000/750
1000/750|| tt | 4-73—14
G4—73—11
Y4—73—02
Y 4--61--02
Y4—6101
Y4—61—01
Y4--73-12
Y4-2×60
Y4—2×60
Y5—53
N2.311/2F
NO.291/2F||tt| |G4—73
Y4—2×73Ne,281/2F
Y4—71—01 N2.29F
Y4—73N.25F
G4—73—12N2.25F
G4—73
G473—11Ne.23D
This standard is proposed and managed by Harbin Large Electric Motor Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Harbin Large Electric Motor Research Institute, and the main drafters of this standard are Yang Chuanjin and Xi Yujun. 482
Moment of inertia of fan
kg·m?
3·938171/2D
Fan moment of inertia
Motor power
2000/1600
3 600/2 200
Motor synchronous speed
600/500
600/500
JB/T6226—92
Continued Table A1
Fan model
G4-73—12
Y4—73—11
FAF21.1 -11.2
Y52X53
ASN—2187/1250
FAF22. 4-12. 61
G473- 11 Ne.22D
FAF21.113. 3—1
FAF--25—12.5—1
FAF—23. 7—13. 3-1
FAF—22.415—1
ASN-2880/1600
ASN—2875/1250
SAF—2816—1
G473—12N2.25D
SAF—2816—1
ASN—2880/18 00
ASN—3000/2000
Y5—2X53
G4—73-14
G4-73-12||tt| |Y473—12
Y4—73—11
Y4-2X60
Y4×60
Y4-2×60
G4—73
Y4-2×60
G4—73-11
Y4-2×60
Y4—73—12
Y4—2X73
Y5-2X56
Y4—2×73
N2,37F
Be careful when the fan is running
14 775 | | tt | 0/560
1250/630
140Q/630
15 00/630
Additional instructions:
Motor synchronous speed
750/600
750/600
750/600
750/600
750/600bzxZ.net
750/600
1000/750
1000/750|| tt | 4-73—14
G4—73—11
Y4—73—02
Y 4--61--02
Y4—6101
Y4—61—01
Y4--73-12
Y4-2×60
Y4—2×60
Y5—53
N2.311/2F
NO.291/2F||tt| |G4—73
Y4—2×73Ne,281/2F
Y4—71—01 N2.29F
Y4—73N.25F
G4—73—12N2.25F
G4—73
G473—11Ne.23D
This standard is proposed and managed by Harbin Large Electric Motor Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Harbin Large Electric Motor Research Institute, and the main drafters of this standard are Yang Chuanjin and Xi Yujun. 482
Moment of inertia of fan
kg·m?
3·938
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