Home » Products » Explosion proof motor » YB2 Series Flameproof Three-phase Induction Motor
  • Introduction
  • Ambient Conditions
  • Main Technical Data

The YB2 series of explosion-proof three-phase induction motors are flame-proof motors that meet advanced international standards. These explosion-proof motors feature high efficiency, high locked-rotor torque, low noise and vibration, and reliable operation. The motor output and mounting comply with IEC standards and GB3836.2 standards for electrical apparatus in explosive situations. the flame-proof feature makes these induction motors ideal for coal mines where methane and coal dust may be present or in factory spaces where flammable gases may be present.

Features:
1. IP55 protection rating.
2. Vertical and horizontal cooling ribs on frame.
3. Ball bearings, small diameter fans, and slot-skewing slopes for low vibration.
4. F class insulation. Above sea level and with standard ambient temperatures, the temperature rise limit of the stator windings is 80K (resistance method). For a frame size of 315L2 and for 4-pole motors with a frame size of 355, the temperature rise limit is 105K.
5. The terminal box has three terminals (for single voltage) or six terminals (for double voltages) and is located on the top of the motor. Armoured cable can also be used.
6. The direction of rotation of the motor for frame sizes H63 to 280 and H315 to 355 motors (4 to 10-poles) may be clockwise and anticlockwise. For frame sizes 315 to 355 2-pole motors, the direction of rotation is clockwise as viewed from the shaft extension. If the motor is required to rotate anticlockwise, please specify when ordering.

Ambient Conditions
Ambient air temperature changes with season, but does not exceed 35℃ (underground coal mine) or 40℃ (factory space), and is not lower than -15℃.
Altitude above sea level: up to 1000m.
Note: when ambient air temperature and altitude are different from the above, refer to GB755.
In the wettest month, the monthly-average maximums relative humidity is 90%, and the minimum temperature should not exceed 25℃ in this month (in factory spaces). In the underground coal mine, the highest relative humidity does not exceed 95%.
In underground coal mines (non-excavating conditions) or factories with easy-ignition and explosive gas or steam, the temperature class is T1~T4.
Rated frequency: 50Hz.
Rated voltage: 380V, 660V and 380/660V.
Note: If you have special requirements for frequency, voltage, ambient air temperature and altitude, etc. please specify them when ordering.

Mounting Arrangement
There are 4 basic mounting arrangements and 10 variant mounting arrangements as shown in the following table:

Technical Data
The B14 motor arrangement features a frame with feet and end-shield with flange (with threaded holes).
Frame size Mounting and overall dimensions
A B C D E F G H K M N P S T n Pipe thread for cable entry AB AC AD HD L
63M 100 80 40 11 23 4 8.5 63 7 75 60 90 M5 2.5 4 M24 × 1.5 130 150 165 230 270
71M 112 90 45 14 30 5 11 71 85 70 105 140 155 250 300
80M 125 100 50 19 40 6 15.5 80 10 100 80 120 M6 3 M30 × 2 165 165 180 230 330
90S 140 56 24 50 8 20 90 115 95 140 180 180 350 360
90L 125 385
100L 160 140 63 28 60 24 100 12 130 110 160 M8 3.5 200 205 400 440
112M 190 70 112 245 230 200 420 460
Note: The numerators of fractions in the table give the data for 2-pole motors and the denominators of fractions give the data for motors with more than 2 poles.
B3 mounting arrangement features a frame with feet and end-shield without flange.
Frame size Mounting and overall dimensions
A B C D E F G H K Pipe thread for cable entry AB AC AD HD L
63M 100 80 40 11 23 4 8.5 63 7 M24 × 1.5 130 150 165 230 270
71M 112 90 45 14 30 5 11 71 140 155 250 300
80M 125 100 50 19 40 6 15.5 80 10 M30 × 2 165 165 180 230 330
90S 140 56 24 50 8 20 90 180 180 350 360
90L 125 385
100L 160 140 63 28 60 24 100 12 200 205 400 440
112M 190 70 112 245 230 200 420 460
132S 216 89 38 80 10 33 132 280 270 450 510
132M 178 550
160M 254 210 108 42 110 12 37 160 15 M36 × 2 330 325 220 520 670
160L 254 710
180M 279 241 121 48 14 42.5 180 355 360 550 730
180L 279 750
200L 318 305 133 55 16 49 200 19 M48 × 2 390 400 250 645 805
225S 356 286 149 55/60 110/140 16/18 49/53 225 435 450 690 865
225M 311 860/890
250M 406 349 168 60/65 140 18 53/58 250 24 M64 × 2 490 500 300 730 945
280S 457 368 190 65/75 18/20 58/67.5 280 545 560 810 1010
280M 419 1060
315S 508 406 216 65/80 140/170 18/22 58/71 315 28 640 630 400 1020 1320/1350
315M 457 1350/1380
315L 508 1490/1520
355S 610 500 254 75/95 20/25 67.5/86 355 28 M72 × 2 740 750 500 1080 1570
355M 560 1650
355L 630 1750
Note: The numerators of fractions in the table give the data for 2-pole motors and the denominators of fractions give the data for motors with more than 2 poles.
B35 mounting arrangement features a frame with feet and end-shield with flange (with through holes).
Frame size Mounting and overall dimensions
A B C D E F G H K M N P S T n Pipe thread for cable entry AB AC AD HD L
80 125 100 50 19 40 6 15.5 80 10 165 130 200 12 3.5 4 M30 × 2 165 165 180 320 330
90S 140 56 24 50 8 20 90 180 180 350 360
90L 125 385
100L 160 140 63 28 60 24 100 12 215 180 250 15 4 205 205 400 440
112M 190 70 112 245 230 200 420 460
132S 216 89 38 80 10 33 132 265 230 300 280 270 450 510
132M 178 550
160M 254 210 108 42 110 12 37 160 15 300 250 350 19 5 M36 × 2 330 325 220 520 670
160L 254 710
180M 279 241 121 48 14 42.5 180 355 360 550 730
180L 279 750
200L 318 305 133 55 16 49 200 19 350 300 400 M48 × 2 390 400 250 645 805
225S 356 286 149 55/60 110/140 16/18 49/53 225 400 350 450 8 435 450 690 865
225M 311 860/890
250M 406 349 168 60/65 140 18 53/58 250 24 500 450 550 M64 × 2 490 500 300 730 945
280S 457 368 190 65/75 18/20 58/67.5 280 545 565 810 1010
280M 419 1060
315S 508 406 216 65/80 140/170 18/22 58/71 315 28 600 550 660 24 6 640 630 400 1020 1320/1350
315M 457 1350/1380
315L 508 1490/1520
355S 610 500 254 75/95 20/25 67.5/86 355 740 680 800 M72 × 2 740 750 500 1080 1570
355M 560 165
355L 630 1750
Note: The numerators of fractions in the table give the data for 2-pole motors and the denominators of fractions give the data for motors with more than 2 poles. 1650
View Full Table
Mounting arrangements B5 or V1 feature a frame without feet and end-shield with flange (with through holes).
Frame size Mounting and overall dimensions
D E F G M N P S T n Pipe thread for cable entry AC AD L
B5 V1
63 11 23 4 8.5 115 95 140 10 3 4 M24 × 1.5 130 170 270 310
71 14 30 5 11 130 110 160 145 300 340
80 19 40 6 15.5 165 130 200 12 3.5 M30 × 2 165 240 330 375
90S 24 50 8 20 180 260 360 405
90L 385 430
100L 28 60 24 215 180 250 15 4 205 300 440 485
112M M36 × 2 230 310 460 520
132S 38 80 10 33 265 230 300 270 320 510 590
132M 550 630
160M 42 110 12 37 300 250 350 19 5 325 360 670 730
160L M48 × 2 710 770
180M 48 14 42.5 360 370 730 800
180L 750 820
200L 55 16 49 350 300 400 400 445 805 875
225S 55/60 110/140 16/18 49/53 400 350 450 8 M64 × 2 450 465 865 935
225M 860/890 930/960
250M 60/65 140 18 53/58 500 450 550 500 500 945 1035
280S 65/75 18/20 58/67.5 560 550 1010 1100
280M 1060 1150
315S 65/80 140/170 18/22 58/71 600 550 660 24 6 630 705 _- 1340/1370
315M 1420/1450
315L 1510/1540
355S 75/95 20/25 67.5/86 740 680 800 M72 × 2 750 725 1600
355M
355L 1780
Note: Motors can be customized for noise, degree of protection, and greasing and draining oil devices. This data is for reference only. Specifications are subject to change from order to order.
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