YB2 Series Explosion-Proof Asynchronous Motors Classification

1

YB2-801-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Winding insulation aging due to long-term high-temperature operation (exceeding rated temperature 80℃); 2. Bearing wear caused by improper lubrication in high-speed rotation

1. Regularly monitor motor shell temperature, ensuring it does not exceed 80℃; clean cooling fins monthly to maintain heat dissipation efficiency; 2. Use high-temperature resistant grease (temperature resistance ≥120℃) for bearings, and replace grease every 2000 operating hours

2

YB2-802-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Rotor imbalance caused by dust accumulation on fan blades during long-term operation; 2. Seal ring aging and cracking due to corrosion of flammable and corrosive gases in the environment

1. Clean the fan blades and rotor surface quarterly to ensure dynamic balance; check the runout of the motor shaft end (allowable error ≤0.05mm); 2. Replace the seal ring every 6 months in corrosive environments, and select fluororubber seals for strong corrosive occasions

3

YB2-90S-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Winding short circuit caused by moisture ingress in high-humidity hazardous areas; 2. Bearing raceway pitting due to vibration of associated equipment

1. Regularly measure the insulation resistance of the winding (≥100MΩ at 500V DC); use moisture-proof cable glands and seal the junction box; 2. Install vibration isolation pads between the motor and the base, and check the vibration amplitude monthly (allowable error ≤2.8mm/s)

4

YB2-90L-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Wear of the motor's end cover bearing seat due to long-term high-speed rotation; 2. Oxidation of the winding lead wire joint caused by poor contact

1. Check the fit clearance between the bearing and the end cover bearing seat semi-annually (allowable clearance 0.015-0.035mm); repair or replace the end cover if excessive wear occurs; 2. Use crimping terminals for the winding lead wire joint, apply anti-oxidation paste, and check the connection tightness quarterly

5

YB2-100L-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Overheating of the stator core due to blocked air ducts; 2. Damage to the bearing retainer caused by foreign objects entering the bearing

1. Clean the air duct and cooling system monthly to ensure unobstructed air flow; check the air volume of the cooling fan (≥1.2m³/min); 2. Install a dust-proof cover at the bearing end, and inspect the bearing for abnormal noise every week; disassemble and clean the bearing if necessary

6

YB2-112M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation breakdown caused by voltage fluctuation in the power supply system; 2. Corrosion of the motor housing by acid-base mist in chemical plants

1. Install a voltage stabilizer or surge protector in the power supply circuit; monitor the power supply voltage fluctuation range (≤±10% of rated voltage); 2. Apply anti-corrosion coating to the motor housing annually; clean the surface with neutral detergent in acid-base mist environments

7

YB2-132S1-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Fatigue damage of the motor shaft due to long-term high-speed operation under overload; 2. Aging of the thermal protector caused by frequent overheating

1. Strictly prohibit overloading operation; the load rate should not exceed 100% of the rated load; install an overload protector in the circuit; 2. Check the performance of the thermal protector semi-annually; replace it if the action temperature deviates by more than 5℃ from the rated value

8

YB2-132S2-1

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Wear of the carbon brush (if equipped) caused by frequent start-stop; 2. Loosening of the motor base bolts due to vibration

1. For motors with carbon brushes, check the carbon brush wear every 1000 operating hours; replace the carbon brush when the wear amount exceeds 1/3 of the original length; 2. Use lock washers for the base bolts; retighten the bolts quarterly to the specified torque (25-30N·m)

9

YB2-160M1-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Damage to the motor's fan cover caused by mechanical impact; 2. Insulation aging of the winding due to long-term operation in a high-temperature and high-humidity environment

1. Install a protective guard around the fan cover to avoid mechanical impact; replace the fan cover if it is deformed or cracked; 2. Improve the ventilation and dehumidification conditions of the installation environment; use a heating dehumidifier in high-humidity areas during shutdown

10

YB2-160M2-1

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing overheating caused by insufficient lubricating oil; 2. Oxidation and rust of the motor shaft due to long-term shutdown and moisture

1. Check the lubricating oil level of the bearing monthly; add lubricating oil in time when the oil level is lower than the specified mark; 2. For motors that are shut down for more than 1 month, apply anti-rust oil to the motor shaft; rotate the rotor manually once a week to prevent rust adhesion

11

YB2-160L-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Winding short circuit caused by dust accumulation on the winding surface; 2. Damage to the motor's terminal block due to loose wiring

1. Clean the winding surface with compressed air every quarter; ensure the insulation distance between windings (≥2mm); 2. Check the tightness of the terminal block wiring monthly; use torque screwdrivers to tighten the terminals to the specified torque (8-10N·m)

12

YB2-180M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Fatigue failure of the motor's stator core lamination due to high-frequency vibration; 2. Corrosion of the bearing inner ring caused by salt spray in offshore environments

1. Install a vibration absorber between the motor and the equipment; monitor the vibration frequency monthly (avoid resonance frequency); 2. For offshore applications, use salt-spray resistant bearings; clean the bearing with fresh water monthly and apply anti-corrosion grease

13

YB2-200L1-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to mismatched load and motor power; 2. Aging of the motor's cable insulation caused by high temperature

1. Select a motor with matching power according to the actual load; the load factor should be between 75%-100% of the rated power; 2. Use high-temperature resistant cables (temperature resistance ≥105℃); keep the cable away from the motor's high-temperature parts (distance ≥10cm)

14

YB2-200L2-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing damage caused by foreign particles entering the bearing during maintenance; 2. Insulation breakdown of the winding caused by static electricity in dry environments

1. During maintenance, clean the bearing installation area thoroughly; use clean tools and lubricants; 2. Ground the motor shell reliably; install a static eliminator in dry environments (relative humidity <40%)

15

YB2-225M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Wear of the motor's coupling due to misalignment between the motor and the driven equipment; 2. Aging of the motor's fan caused by long-term high-speed rotation

1. Align the motor and driven equipment quarterly (axial deviation ≤0.2mm, radial deviation ≤0.1mm); 2. Check the fan blade for cracks and deformation monthly; replace the fan if the air volume decreases by more than 20%

16

YB2-250M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation aging caused by long-term operation at high altitude (thin air, poor heat dissipation); 2. Corrosion of the motor's junction box due to chemical vapor

1. For high-altitude applications (above 1000m), derate the motor by 5% for every 1000m increase; strengthen heat dissipation measures; 2. Seal the junction box with sealant; inspect the junction box for corrosion quarterly and replace the sealing gasket if necessary

17

YB2-280S-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing failure caused by long-term operation under high load; 2. Loosening of the motor's rotor balance block due to vibration

1. Monitor the motor load monthly; avoid long-term operation at 110% of the rated load; replace the bearing with a heavy-duty type if necessary; 2. Check the rotor balance block for looseness quarterly; tighten the fixing screws and apply thread locking adhesive

18

YB2-280M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to blocked cooling water channels (for water-cooled models); 2. Damage to the motor's thermal relay caused by frequent overcurrent

1. For water-cooled models, clean the cooling water channel every 6 months; ensure the water flow rate (≥5L/min); 2. Check the thermal relay's action current and reset function semi-annually; replace the thermal relay if it fails to act correctly

19

YB2-315S-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation breakdown caused by lightning strikes in outdoor environments; 2. Corrosion of the motor's bearing outer ring due to moisture

1. Install a lightning arrester at the motor's power inlet; ground the lightning arrester reliably; 2. Keep the motor installation environment dry; use a dehumidifier in rainy seasons; check the bearing for rust monthly

20

YB2-315M-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Fatigue damage of the motor shaft due to long-term operation with unbalanced load; 2. Aging of the motor's seal ring caused by ozone in the atmosphere

1. Balance the load before operation; avoid eccentric load operation; check the motor shaft for bending quarterly (allowable error ≤0.03mm); 2. Use ozone-resistant seal rings; replace the seal ring every 8 months for outdoor applications

21

YB2-315L1-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to insufficient power supply voltage; 2. Damage to the motor's terminal block caused by chemical corrosion

1. Monitor the power supply voltage during operation; ensure the voltage is within the range of 380V±10%; 2. Use corrosion-resistant terminal blocks (e.g., stainless steel 316L); clean the terminal block with alcohol monthly

22

YB2-315L2-2

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing wear caused by long-term operation without maintenance; 2. Insulation aging of the winding caused by high-frequency harmonic interference in the power grid

1. Formulate a regular maintenance plan; conduct comprehensive maintenance (including bearing inspection, winding cleaning, etc.) every 5000 operating hours; 2. Install a harmonic filter in the power grid; monitor the harmonic content monthly (total harmonic distortion ≤5%)

1

YB2-801-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Winding insulation aging due to long-term operation in a closed environment with poor heat dissipation; 2. Bearing wear caused by dust entering the bearing

1. Ensure the installation environment is well-ventilated; avoid closed installation; clean the cooling fins monthly; 2. Install a dust-proof cover at the bearing end; check the bearing for dust accumulation quarterly and clean it

2

YB2-802-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Rotor stuck caused by foreign objects entering the motor; 2. Seal ring damage caused by vibration of the motor base

1. Install a protective net at the motor's air inlet; check the inside of the motor for foreign objects before starting; 2. Use vibration-damping pads for the motor base; adjust the base level to reduce vibration

3

YB2-90S-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Winding short circuit caused by loose winding coils; 2. Corrosion of the motor housing by industrial waste gas

1. Check the winding coils for looseness quarterly; fix the coils with insulating tape if necessary; 2. Apply anti-corrosion paint to the motor housing annually; clean the surface with a soft cloth regularly

4

YB2-90L-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Bearing overheating caused by excessive lubricating grease; 2. Loosening of the motor's fan bolt due to vibration

1. Add lubricating grease according to the specified amount (1/3-1/2 of the bearing cavity); avoid over-greasing; 2. Check the fan bolt tightness monthly; use lock washers and thread locking adhesive

5

YB2-100L1-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Winding insulation breakdown caused by power supply frequency fluctuation; 2. Damage to the motor's terminal block due to poor contact

1. Monitor the power supply frequency (50Hz±1Hz); install a frequency stabilizer if necessary; 2. Check the terminal block contact condition monthly; clean the contact surface with sandpaper if there is oxidation

6

YB2-100L2-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; nitrile rubber seal ring

1. Fatigue damage of the motor shaft due to frequent start-stop; 2. Aging of the motor's cable sheath caused by friction

1. Reduce unnecessary start-stop operations; use a soft starter to reduce start-up impact; 2. Protect the cable with a cable sleeve; avoid friction between the cable and other objects

7

YB2-112M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to overload operation; 2. Corrosion of the bearing caused by moisture in the air

1. Install an overload protector; cut off the power supply immediately when overloading is detected; 2. Keep the motor dry; use a dehumidifier in humid environments; apply anti-rust oil to the bearing

8

YB2-132S-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation aging caused by high temperature in summer; 2. Damage to the motor's fan caused by foreign objects

1. Strengthen heat dissipation measures in summer (e.g., install an exhaust fan); monitor the motor temperature; 2. Install a protective cover at the fan end; check the fan for damage monthly

9

YB2-132M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing wear caused by misalignment of the motor and driven equipment; 2. Loosening of the motor's base bolts due to thermal expansion and contraction

1. Align the motor and driven equipment quarterly; ensure the coaxiality meets the requirements; 2. Check the base bolts seasonally; retighten them to compensate for thermal expansion and contraction

10

YB2-160M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding short circuit caused by static electricity in dry environments; 2. Corrosion of the motor's junction box by chemical agents

1. Ground the motor reliably; increase the environmental humidity (relative humidity 40%-60%) in dry seasons; 2. Seal the junction box with anti-corrosion sealant; avoid chemical agents splashing on the junction box

11

YB2-160L-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; EPDM rubber seal ring

1. Overheating of the motor due to blocked air ducts; 2. Damage to the motor's thermal protector caused by voltage surge

1. Clean the air ducts and cooling fins monthly; ensure unobstructed air flow; 2. Install a surge protector in the power supply circuit; check the thermal protector's performance semi-annually

12

YB2-180M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Fatigue failure of the motor's stator core due to long-term vibration; 2. Corrosion of the motor shaft due to salt water in marine environments

1. Install vibration isolation pads; monitor the vibration amplitude monthly; 2. For marine applications, use stainless steel motor shafts; apply anti-corrosion coating to the shaft surface

13

YB2-180L-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing damage caused by insufficient lubrication during long-term operation; 2. Aging of the motor's seal ring caused by high temperature

1. Replace the bearing grease every 1500 operating hours; use high-temperature resistant grease; 2. Replace the seal ring every 6 months; select seal rings with temperature resistance ≥100℃

14

YB2-200L-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation breakdown caused by lightning strikes; 2. Loosening of the motor's rotor windings due to vibration

1. Install a lightning arrester; check the lightning arrester's performance annually; 2. Check the rotor windings for looseness quarterly; fix them with binding wire if necessary

15

YB2-225S-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to power supply phase loss; 2. Corrosion of the motor housing by acid rain in outdoor environments

1. Install a phase loss protector; cut off the power immediately when phase loss is detected; 2. Apply anti-rain corrosion paint to the motor housing; install a rain cover for outdoor use

16

YB2-225M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing wear caused by foreign particles in the lubricating grease; 2. Damage to the motor's terminal block due to overheating

1. Use clean and qualified lubricating grease; filter the grease before adding; 2. Check the terminal block temperature monthly; ensure good contact to avoid overheating

17

YB2-250M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation aging caused by long-term high-load operation; 2. Aging of the motor's fan blade caused by long-term use

1. Avoid long-term operation at full load; reduce the load appropriately when the temperature is high; 2. Check the fan blade for cracks and deformation monthly; replace the fan blade if necessary

18

YB2-280S-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing failure caused by high temperature in the working environment; 2. Loosening of the motor's junction box cover bolts due to vibration

1. Install a heat shield around the motor in high-temperature environments; 2. Check the junction box cover bolts monthly; retighten them and apply thread locking adhesive

19

YB2-280M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Overheating of the motor due to mismatched power; 2. Corrosion of the bearing inner ring caused by chemical vapor

1. Select a motor with appropriate power according to the actual load; 2. Use chemical-resistant bearings; clean the bearing with neutral detergent monthly and apply anti-corrosion grease

20

YB2-315S-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding short circuit caused by dust accumulation; 2. Damage to the motor's thermal relay caused by frequent overcurrent

1. Clean the winding surface with compressed air quarterly; 2. Check the thermal relay's action performance semi-annually; replace it if it is faulty

21

YB2-315M-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Fatigue damage of the motor shaft due to unbalanced load; 2. Aging of the motor's seal ring caused by ozone

1. Balance the load before operation; check the motor shaft for bending quarterly; 2. Use ozone-resistant seal rings; replace the seal ring every 8 months

22

YB2-315L1-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Bearing overheating caused by poor heat dissipation; 2. Corrosion of the motor housing by industrial dust

1. Strengthen heat dissipation measures; ensure the cooling system is working normally; 2. Clean the motor housing monthly; apply anti-corrosion coating annually

23

YB2-315L2-4

Cast iron (HT250) motor housing; copper wire winding; aluminum alloy rotor; fluororubber seal ring

1. Winding insulation breakdown caused by voltage fluctuation; 2. Loosening of the motor's base bolts due to long-term vibration

1. Install a voltage stabilizer; monitor the power supply voltage; 2. Check the base bolts monthly; retighten them to the specified torque and use lock washers