JB/T 8681-1998 This standard specifies the type, specimen parameters and dimensions, technical requirements, test methods and inspection rules of YDT series (IP44) variable-pole multi-speed motors, as well as requirements for marking, packaging and warranty period. This standard applies to YDT series (IP44) variable-pole multi-speed three-phase asynchronous motors (frame sizes 80~315). The motors specified in this standard are suitable for occasions where fans and pumps require speed regulation. JB/T 8681-1998 Technical conditions for YDT series (IP44) variable-pole multi-speed three-phase asynchronous motors (frame sizes: 80~315) JB/T8681-1998 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T8681-1998
Technical Conditions for YDT Series (IP44) Pole-changing Multi-speed Three-phase Asynchronous Motors
Published on March 11, 1998
(Frame Size 80~315)
Implemented on July 1, 1998
Ministry of Machinery Industry of the People's Republic of China
JB/T8681-1998
The motors specified in this standard are suitable for occasions where fans and pumps require speed regulation, and the comprehensive performance indicators of the products reach the advanced level of similar foreign products.
This standard is proposed and managed by the National Technical Committee for Standardization of Rotating Electric Machines. The responsible drafting units of this standard are: Shanghai Electric Science Research Institute of the Ministry of Machinery Industry and Chaobei Motor Factory. The drafting units of this standard include: Shanxi Electric Motor Factory, Dalian Electric Motor Factory, Wannan Electric Motor Factory, Kunming Electric Motor Factory, Fuzhou Power Equipment Factory, Zhanjiang Electric Motor Factory, Nantong Electric Motor Factory, Wuxi Huada Electric Motor Factory, Nanjing Steam Turbine Electric Motor Factory, Shenyang Industrial Electric Motor Factory, Suzhou Electric Motor Factory, Qingjiang Electric Motor Factory, etc.
The main drafters of this standard include: Huang Jian, Yao Yeqin, Li Wenzheng, Deng Lihong, Li Xiuying. This standard is interpreted by the National Technical Committee for Standardization of Rotating Electric Machines. Mechanical Industry Standard of the People's Republic of China
Technical Conditions for YDT Series (IP44) Pole-changing Multi-speed Three-phase Asynchronous Motors
1 Scope
(Frame Size 80~315)
JB/T8681-1998
This standard defines the types, basic parameters and dimensions, technical requirements, test methods and inspection rules, as well as requirements for marking, packaging and warranty period of YDT series (IP44> pole-changing multi-speed motors. This standard applies to YDT series (IP44) pole-changing multi-speed three-phase asynchronous motors (frame size 80~315) (hereinafter referred to as motors). 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB 191—90
GB/T 75587
GB/T 997--81
GB/T 1032--85
GB/T 1993-93
GB/T 4772. 1—84
GB/T 4942. 1--85
GB/T 10068-88
GB/T 10069--88
GB/T 1266590
JB/Z 29487
JB/Z 346---89
Packaging, storage and transportation pictorial symbols
Basic technical requirements for rotating electrical machines (neqIEC34-1-1994)Motor structure and installation type code (neqIEC34-7-1992)Test methods for three-phase asynchronous motors
Cooling methods for rotating electrical machines (neqIEC34-6-1991)Motor dimensions and tolerancesMotors with frame numbers 36 to 400 and flange numbers FF55 to FF1080 or FT55 to FT1080 (ncq IEC72-1-1991) Classification of protection of motor housing (neqIEC34-5-1991) Measurement method and limit of vibration of rotating motor (neqIEC34-14-1986) Measurement method and limit of noise of rotating motor (idtIEC34-9-1990) Requirements for damp heat test of motors under normal environmental conditions Test method for inter-turn insulation of AC low-voltage motor loose-embedded windings Test limit of inter-turn insulation of AC low-voltage motor loose-embedded windings 3 Types, basic parameters and sizes寸
3.1 The protection grade of the motor housing is IP44 (see GB/T4942.1). 3.2 The cooling method of the motor is IC411 (see GB/T1993). 3.3 The structure and installation type of the motor are IMB3, IMB5, IMB6, IMB7, IMB8, IMB35, IMV1, IMV3, IMV5, IMV6, IMV15 and IMV36 (see GB/T997). Manufactured according to the provisions of Table 1. Table 1
Frame size
B0~160
180-225
250~315
Structure and installation code (IM)
B3, B5, B6, B7, B8, B3s, V1, V3, V5, V6, V15, V36.B3. B5, B35, V1
B3, B35, V1
Approved by the Ministry of Machinery Industry on March 11, 1998
Implementation on July 1, 1998
JB/T8681-1998
3.4 ​​The motor rating is a continuous rating based on the continuous duty system (S1). 3.5 The rated frequency of the motor is 50Hz, and the rated voltage is 380V. 3.6 The motor changes speed by changing poles, and has two types: two-speed and three-speed. The connection method of the stator winding and the number of outlet terminals of the motor at various speed ratios shall be in accordance with the provisions of Table 2.
Number of outlet terminals
3000/1500
Synchronous speed
1500/1000
1500/750
The corresponding relationship between the motor frame number and the speed ratio and power shall be in accordance with the provisions of Table 3. Table 3 | |tt | .40/1.10
5-90/1.40
8.00/2.00
12.5/2.80
16.0/3.80
1500/100 0 | | tt |
12.0/4.00
15.5/5.10
18.0/6.20
24.0/8-50
33.0/11.0
38.0 /13.0
47.0/16.0
55.0/18.5
70.0/25.0
B4.0/28.0
95.0/32.0
1500/750
1000/750
1000/750
1.00/0.22
1.30/0.30
2.00/0.55
2.40/0.65
3.20/0.90
4. 50/1.10
6.30/1.50
8.90/2.00
12.0/2.70
16.0/4.00
19.5/5.00
29.0/7.50
40.0/9.50
52.0/14.5
65.0/17.0
75.0/18.5
92.0/25.0
Note: The numbers 1 and 2 after the frame number represent the maximum power at the same speed. 3.8 Motor dimensions and tolerances
0.65/0.25
0.80/0.35
1.30/0.55
1.60/0.75
2.00/0.85
2.60/1.20
3.30/1.60
4.50/2.20
6.50/3.20
9.0 0/4.50 | | tt | /32.0
75.0/37.0
90.0/45.0
1500/1000/750
YY/Y/Y
1500/1000/750
2. 30/0. 80/0. 60||tt ||3. 10/1,10/0.80
4.50/1.50/1.10
7. 50/2. 60/1. 50
10. 2/3, 50/ 2. 00
13,0/4.50/2.60
16.0/6.00/3.30
22.0/8. 00/4.50
28. 0/10. 0/ 5. 50
34.0/12.0/7, 50
44.0/15.5/10.0
55.0/18.0/12.0
66.0/21.0/15.0||tt ||75.0/27.0/19.0
90.0/32.0/22.0
115/40.0/28.0
140/51.0/35.0
3.8.1Motor The installation dimensions and tolerances shall comply with the requirements of Tables 4 to 7, and the overall dimensions shall not exceed those specified in Tables 4 to 7. 2
Frame number
Basic
1909511070
216108
254123
318159305133
406203349/168
508254457216
JB/T8681-1998
YDT80~YDT132
±& 88
YDT160~YDT315
Table 4 Machine base belt Dimensions and tolerances of motors without flanges on the base and end covers
110±0.430
±0.50020
1) G=D-CE, the limit deviation of CE for machine frame B0 is (+\), and for the rest it is (+*). 2) The position measurement of K hole is based on the axis of the shaft extension, 71
0: 430
+9-513
Position
Overall dimensions
Frame No.Flange No.
90SFF165
YDT8~ YDTI32
Basic Basic Basic Basic Limit
Complex Basic Plate Carving Basic
216108
254121
318159
9305133
356178
406203
349158
190|±4.0|75
FF600 508254457216
JB/T8681-1998
YIT160~YDT315
YDT180~YDT200
Table 5 Installation dimensions of motors with base feet and flanges on end covers and tolerance
fuel limit basic limit basic
position weight M basic extreme gingival
limit Norben limit
± 0. 310
±0.50020| |tt||1) GD-GE, GE limit deviation for frame size 80 is (1\), and for the rest is (+). 2) The position tolerance of the K hole is based on the axis of the shaft extension. 3) P The dimensions are the maximum limit values.
4) R is the distance from the flange mating surface to the shaft shoulder. i5. s
165130
215180
265230
300250
YDT225~YDT315
Outline dimensions
Basic limitBasic limit
ACADWL
Basic limit of position measurement
Dimension deviation
Dimension deviation
350300±0.016400
400|350± 0.018450
500450±0.020550
600550±0.02 2560 | | tt | | 175150175290 | tt|| 395420
315475
475345530
515385575
585410640
7446455768651340
YDT80-~ YDT132
Machine base flange number
90SFFI65
FF35055
+8:883
JB/T8681-1998
YDT160~YDT225
YDT 80~YDT200
Table 6 Motors and cemeteries with bases without feet and flanges on end covers
Installation dimensions
Limit basic||tt ||110±0.430
140±0.500
Basic limit
The ruler is too shy
15. 5.-8.1.
165130
215180
265230
300250
±8:81
Basic limitBasic limit||tt ||Limit deviation scale
350300±0.t16400
400:950|±0.018|450
1)G=D-GE, GE limit deviation for machine frame number 80 is (+\), the rest is (\8\) 2>P dimension is the maximum limit value.
3)R is the distance from the flange mating surface to the shaft extension. ±3.c
Basic position
YDT225
Dimensions
ACADHFL
150185290
160195
180245380| |tt||190265400
210315
3802854
t20:315
480775
47513455
Frame No. Flange No.
200LFF350
FF40060
110±0.430
JB/T8681-1998
YDT180~YDT200
YDT225～YDT315||tt ||Mounting dimensions and tolerances of vertically mounted motors, without base feet, with flanges on end covers and shafts extending downwards
±0.50020
1)G-D-GE, The limit deviation of GE is (+\). 2) P dimension is the maximum limit value,
3) R is the distance from the flange mating surface to the shaft shoulder. 4) The position of the S hole is based on the axis of the shaft extension. os
300250
±8:818
Basic limit basic
Deviation state||tt ||350300±0.016400
400350±0.018450
500 450±0.020550
600550±0. 022 660
Basic position
Dimensions|| tt||AC|AD|HF|L
285500
420315550850
475345610
515 3856501035
5804102012g
645576900
JB/T8681-1998
3.8.2 The dimensions and tolerances of the motor shaft extension key shall comply with the provisions of Table 8. Table 8
Shaft extension diameter
The radial runout tolerance at the half of the shaft extension length shall comply with the provisions of Table 9. Table 9
Sacrificial diameter
>30～50
>50～B0
Drawing runout tolerance
The radial runout of the 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 103.8.4
.
Flange stop diameter
130~230
>230~450
>450～680
The parallelism tolerance of the motor axis to the foot support surface shall comply with the provisions of Table 11. Table 11
80~250
>251~315
3.8.6 The flatness tolerance of the motor foot support surface shall comply with the requirements of Table 12. Circular run-out tolerance
Parallelism tolerance
JB/T8681-1998
The largest dimension of the distance between the outer edges of the feet AB or BB>100~160
>160~250
>250-400
>400~630
>630~1000
Flatness tolerance
Note: AB is the distance between the outer edges of the motor feet (end view): BB is the distance between the outer edges of the motor feet (side view) 3.8.7
The symmetry tolerance of the keyway on the motor shaft extension shall comply with the provisions of Table 13 Table 13
Technical requirements
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 conditions of altitude, ambient air temperature and ambient air relative humidity. 4.2.1 The altitude shall not exceed 1000m.
4.2.2 The maximum ambient air temperature varies with the seasons but shall not exceed 40℃. mm
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℃, the provisions of GB/T755 shall be followed. 4.2.3 The minimum ambient air temperature is 15℃. 4.2.4 The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of the month is not higher than 25℃. 4.3 The deviation of the power supply voltage and frequency from the rated value during the operation of the motor shall be in accordance with the provisions of GB/T755. 4.4 When the power, voltage and frequency of the motor are rated, the guaranteed value of its efficiency shall comply with the provisions of Table 14. The efficiency is determined by the indirect loss analysis method, and the stray loss is calculated as 0.5% of the rated input. The square of the stray loss current at non-rated points is converted. In the calculation, the efficiency value is taken to four effective digits.
4.5 When the power, voltage and frequency of the motor are rated, the guaranteed value of its power factor shall comply with the provisions of Table 15. The power factor value is taken to three effective digits.
4.6 At rated voltage, the guaranteed value of the ratio of the motor's stall torque to the rated torque shall comply with the provisions of Table 16. 4.7 Under rated voltage, the guaranteed value of the ratio of the minimum torque to the rated torque during motor starting is 0.8 times at low speed and 0.5 times at other speeds.
4.8 Under rated voltage, the guaranteed value of the ratio of the maximum torque to the rated torque during motor starting is 1.8 times. Under rated voltage, the guaranteed value of the ratio of the motor's locked-rotor current to the rated current shall comply with the provisions of Table 17.4.9
Frame size
3000/1500
68.0/58.0
70.0/64.0
71.0/70.0
75.0/72 .0 | |tt | 1998
Synchronous speed
1500/1000
70.0/63.0
72.0/68.0
80.0/73.0
81.0/74.0
82.0/78.0bzxZ.net
84.0/81.0
85.0/83.0
87.0/83.0
88.0/83.0
87.0/81.0
87.0/81.0
88.0/83.0
8 9.0/84.0
90.0/85.0
90.0/85.0
90.0/85.0
91.0/87.0
91.0/87.0
91.0/8 9.0 | | tt | | 92.0 / 90.0 |
83.0/71.0
84.0/75.0
85.0/78.0
85.0/82.0
86.0/84.0
88.0/84.0||tt| |89.0/85.0
90.0/87.0
91.0/88.0
91.0/88.0
91.0/89.0
91.0/90.0
91.0/90.0
92.0/91.0
9 2.0/91.0
92.0/91.0
1000/750
65.0/52.0
67.0/56.0
71.0/62.0
74.0/6 6.0 | |tt | | 74.0/67.0 | 0
88.0/83.0
89.0/87.0
90.0/87.0
90.0/88.0
91.0/89.0
91.0/89.0||tt ||91.0/90.0
92.0/91.0
92.0/91.0
92.0/91.0
1500/1000/750
79.0/65.0/61.0
81.0/71.0/68.0
8 3.0/74.0/72.0
84.0/79.0/79.0
86.0/81.0/81.0
86.0/80.0/80.0
87.0/81.0/81.0|| tt ||87.0/82.0/82.0 | ||90.0/87.0/89.0
91.0/88.0/90.0
91.0/88.0/90.0
92.0/89.0/91.0
Frame number
280M 2
3000/1500
0. 82/0. 62
0. 81/0.B5
0.82/0.72
0.86/0.73
0-87/0.72
0.87/0.72
0.88/0 .74
0. 91/0. 74
0.91/0.77
0.91/0.75
0. 91/0.76
JB/T8681-1998
Synchronous speed
1500/10G0
0.78/0.66
0.81 /0.66
0.79/0.66
0. 78/0. 67
0.82/0.68
0.83/0.68
Q.85/0.69|| tt||0.84/0.69
0.84/0.69
0. 84/0. 72
0.85/0. 74
0.86/0.84
0.86/0. 85
0.89/0.87
0.88/0.86
0.88/0.87
0.88/ 0.87
0.86/0.79
0.86/0.78
0.86/0.80
0. 88/0.80
1500/750
0.82/ 0.62
0.82/a. 63
0.80/0.61
0.81/6.61
0.78/0.59
0.82/0.59
0.83/0.59
0.85/0.67| |tt||0.86/0.67
0.85/0.65
0.85 /0.66
0.85/0.66
0.B8/0.64
0.87/0.66
0.87/0.68
0.88/0.70
0.86 /0.70
0.86/0.70
0.87/0.70
0. 87/0. 71
1000/750
0. 63/0. 58
0.62/0-58
0.66/0-58
0.67/0.59
0.68/0.69
0.76/0.60
0.75/0.60
0. 76/0. 61
0.77/0. 62| |tt||0.77/0. 65
0. 80/0. 66
0. 80/0. 68
0.83/0.78
0.86/0.80
0.86/0.81
0.82/0.81
0.82/0.81
0.84/0.78| |tt||0.85/0.80
0.85/0.78
0.85/0.78
1500/1000/750
0. 73/0. 57/0. 53| |tt||0.79/0. 60/0.57
0. 82/0. 65/0.57
0. 82/0.67/0.5B
0. 85/0.68/0. 60
0. 90/0. 80/0. 63
0. 90/0. 81/0 . 63
0.90/0. 82/0.62
0. 88/0. 85/0.70
0. 89/0. 86/0. 74
0 . 92/0. 85/0. 95
0. 92/0. 85/0. 74
0.92/0.86/0. 76
0. 91/0.84/0 . 73
1 4. 91/0. 84/0. 72
c, 91/0- 85/0. 74
G. 90/0. 84/0, 72
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