YBBP Series Flameproof Frequency C ontrol S peed
Three-phase Asynchronous Motor
(ExdIIBT4 Frame No.80~450)
Series YBBP is crafted in alignment with 'The Technical Conditions of Explosion-proof' ( d II) Frequency Control Speed Three-phase Asynchronous Motor (Seat No. 80-450) following Q/NF201.2 enterprise standards.
The explosion-proof attributes of this series of motors comply rigorously with national standards GB3836.1 , GB3836.2 .
Safety Warnings
1. Thoroughly read the 'Instruction for Use' before operation.
2. Avoid disassembling any components while the device is operational.
3. During reassembly post-repair, ensure all screws and bolts are securely fastened.
4. In the event of corrosion or damage to explosion-proof parts, contact the manufacturer for replacements; do not substitute parts on your own discretion.
5. Pair the motor with a suitable transducer and implement appropriate temperature-control measures. Monitor the surface temperature diligently to avert surpassing temperature limits, thereby mitigating explosion risk.
6. The motor, utilizing the IC411 cooling method, is predominantly suited for fans and pumps (excluding Roots blowers and hydraulic pumps) characterized by square law load dynamics.
1. Summary
1.1 YB BP This explosion-proof frequency control speed three-phase asynchronous motor (hereinafter referred to as: Motor) is designed to act as a driver in environments containing explosive gases.
1.2 A prominent, permanent 'Ex' marking resides at the upper right corner of both the nameplate and casing, accompanied by a comprehensive explosion-proof designation: comprising type, classification, and marking details.

2, Motor Type and Its Significance
2.1 This manual pertains to the YBBP80 ~ 450 series motors:
2.2 A comprehensive breakdown of motor type codes:
3. Usage Conditions of the Motor
3.1 Environmental Usage Conditions:
3.1.1 The motor should be operated at altitudes not exceeding 1000m.
3.1.2 Ambient temperature fluctuates seasonally but must not surpass +40 ºC .
3.1.3 Minimum ambient air temperature is -15 ºC .
Note: If operating above 1000m altitude or under extreme temperatures above or below +40 Stay informed about the precise temperature specifications for optimal performance: ºC For a seamless integration and compliance, ensure adherence to the esteemed GB755 standards.
4.2.4 Witness the engineering marvel as the environment's peak relative humidity for the most humid month averages 90%, while maintaining a minimum temperature no higher than 25 ºC .
4.2.5 Engineered for safety, these motors can operate in environments with flammable gases of the T1 ~ T4 ignition temperature group or in places where explosive mixtures with vapor and air are present.
3.2 The Electrical Excellence of the Motor: Crafted for Performance
3.2.1 Optimize your operations with our motor's rated frequency of 50Hz. Experience versatile performance as the frequency range varies across poles: 2 pole motors offer a spectrum of 3 ~ 60Hz, while those with 4 poles and above thrive at 3 ~ 100Hz. Delight in constant torque from 3-50Hz and constant power at 50Hz or above.
3.2.2 Catering to diverse needs, motors with frame No. 132 or below boast rated voltages of 380V or 660V. Those with frame No. 160 ~ 225 shine at 380/660V, while frames No. 250 and above accommodate 380/660V or 660/1140V. Employ three-phase AC variable frequency power tailored for each voltage, ensuring efficiency and flexibility. Relish in the precision of 380V and 660V for 380/660V motors, and the power of 660V and 1140V for 660/1140V motors.
3.2.3 Seamlessly integrate the motor with a matching inverter, designed for either current or voltage type. We
advocate for explosion-proof converters aligned with the motor's explosion-proof level. If opting for a non-explosion-proof inverter, ensure placement in safe, non-hazardous locations. For power lines exceeding 10m between inverter and motor, a filter at the inverter's output is advised to mitigate harmonic content. Should motor vibration spike during frequency modulation, the inverter can be adjusted to skip the affected frequency band. Maintain inverter harmonic content below 5%, ensure pulse amplitude at motor terminals does not exceed 2.2 times, and voltage rise time at motor terminals exceeds 400ns.
3.2.4 Designed for S1 continual working system, ensuring uninterrupted productivity.
3.2.5 The motor's stator windings employ either the Grade insulation system or F Grade, guaranteeing durability and reliability.
3.2.6 For small motors with forced ventilation, enjoy independent three-phase AC power with 380V or 660V rated voltage at 50Hz frequency. Voltage customizations are available to meet user-specific requirements.
3.2.7 Experience diverse cooling methods: IC411 with FM range 3 ~ 60Hz suits square law load, while IC416 with FM range 3-50Hz caters to constant torque load. Beyond 50Hz, embrace constant power load. Mechanical load characteristics are illustrated in Figure 1 ~ Figure 3. Relationship comparisons of frame number, power, and rotational speed are laid out in Table
Table 1 Note: Should environmental or electrical conditions deviate from those outlined in sections 3.1 and 3.2, refer to the motor's nameplate for precise requirements.
4 The Art of Structure: A Comprehensive Explanation
4.1 With a protective grade of IP55 for the main-body crust, explore the explosion-proof structure in Attached figure 1
4.2 Discover unparalleled durability with our motor's stator windings, meticulously crafted using polyester lacquer-covered round copper wire. These windings undergo an advanced VPI dipping lacquer process, merging seamlessly with the stator core to deliver superior electric, mechanical, and moisture-proof performance, alongside excellent thermostability. The rotor, a robust squirrel-cage design, is precisely affixed to the axis through a sophisticated hot jacket technique to ensure a balanced, smooth, and virtually vibration-free operation.
4.3 Flexibility meets innovation with our motor series, which boasts a versatile basic structure and installation types including IMB3, IMB35, IMB5, and IMV1. We also cater to bespoke configurations tailored precisely to meet your unique requirements.
4.4 Designed for optimal thermal management, our motor utilizes an advanced cooling system with options for the IC411 whole-seal natural cooling fan or the powerful IC416 forced ventilation, ensuring reliable performance under demanding conditions.
4.5 Engineered for precision, our motor features a cylindrical axle extension designed to seamlessly integrate with couplings or spur gears, enhancing performance and compatibility. , Your spur gear's pitch diameter should ideally exceed three times the axle extension's diameter. We also offer customized solutions, including double or specialized axle-extension motors, tailored to your specific ordering requirements.
4.6 The motor's junction box is strategically positioned on the top of the seat, housing three terminals for single-phase voltage applications and six for dual voltage. For enhanced safety and explosion-proof assurance, the double-inlet junction box employs meticulous sealing techniques with metal gaskets to ensure durability and protection. PTC or PT100 temperature sensors come with dedicated outlets, and an inner grounding is provided through a steel or brass plated screw. The junction box accommodates rubber cables, steel pipe wiring, and explosion-proof flexible pipes (armored cables), all within an IP55 protection class, detailed in the attached figure. Attached figure 2-3 .
4.7 Equipped with stator winding temperature devices, the motor includes critical safety features. Users are advised to implement a temperature protection device to cut off power when stator winding temperatures reach 140ºC, preventing overheating. Additionally, bearing temperature monitoring components can be integrated upon request, with detailed structure available in the attached figure. 0 ºC , enhancing safety by preventing excess surface temperatures. Customizable temperature-measuring components for bearings are available, outlined in the Attached figure 3 .
4.8 Our motor incorporates high-performance rolling bearings, with the trademark details specified on the nameplate. For enhanced longevity, the shaft-through design utilizes framework oil seals, V shaft sealing rings, or skeleton oil-sealing structures.
5. Tips for Explosion-Separate Motor
5.1 Our motor design prioritizes safety by ensuring any explosive mixtures that enter do not trigger external explosions. We implement rigorous measures to prevent dust ingress, strengthening the motor crust's integrity and explosion-proof interface clearance. Additionally, we control diameter discrepancies, length, and hazardous temperatures to optimize explosion-proof and separation performance.
5.1.1 The Essential Role of Explosion-Proofing and Explosion-Separation:
Precision-engineered clearance and creepage distances between explosion-proof interfaces, bare conductors within junction boxes, and exposed conductors to the metal crust are detailed in the Attached figure 2-3 .
5.1.2 To ensure optimal performance and safety, the motor's surface temperature under prescribed working conditions aligns perfectly with the standards outlined in Table 2. This careful regulation ensures that the intake temperature of the cable remains within the permissible range, maintaining cable reliability throughout operation.
Table 2 5.2 To preserve the explosion-proof integrity of the motor's casing, it is crucial to secure bolts with tightening washers, preventing any unintended loosening. Ensure there is ample space between fastened bolts and their bases, and the metal surrounding the airtight screw maintains at least one-third the worm aperture's thickness, with a minimum of 3mm.
5.3 For utmost safety, cables entering the motor's junction box must be sealed with an elastic sealing ring, detailed in Figure 7. With a Shore hardness of 45~55°, the sealing ring's material complies with appendix D3.3 of GB3836.1. The cable's diameter should precisely match the sealing ring's pore size, adjustable via concentric grooves. When compressing the junction box hopper, ensure complete contact between the sealing ring, cable, and junction box seat to preserve explosion-proof properties.
5.4 The junction box terminal sheath and connection board insulation parts use II-grade insulation materials, ensuring superior safety and reliability.
5.5 Grounding: As a critical safety measure, the grounding system is designed to prevent creepage. The grounding terminal, made of either steel or copper galvanized bolt, is prominently positioned on the crust and marked with an earthing symbol for easy identification. .
5.6 Explosion-proof components consist of various specialized parts including the seat, end cover, axis (rotor), inner and outer bearing caps, junction box seat and cover, wiring bolt, terminal sheath, connection board, and sealing ring, as illustrated in Attached figure 1 -4 .
6. Guidelines for Motor Operation and Maintenance
6.1 Pre-Installation Preparation
Verify the packaging's integrity before proceeding with unpacking.
6.1.2 Post-unpacking, meticulously remove dust from the motor and any rust from the axle's edge to maintain pristine condition.
6.1.3 Confirm that the nameplate (and auxiliary signs) matches the contract requirements and the operational environment.
6.1.4 Prior to installation, ensure the following checks are completed. Non-compliance with any criteria prohibits use.
a) Validate the presence of explosion-proof marks and certification numbers. Verify their compliance with the hazardous environment specifications for explosive gases and flammable dust.
b) Ensure all bolts are securely fastened, spring washers are intact, and all part connections are correctly executed.
c) Inspect for cracks or faults in explosion-proof parts that could compromise performance. This step is waived for new motors.
d) Confirm that the oil pipe remains unobstructed for proper functionality.
e) For temperature-monitored motors, properly configure the temperature measuring setup. Prevent temperature device wires at the fan end from contacting the fan, which could cause accidents.
6.2 For motors subjected to long-distance transport or prolonged inactivity, check the insulation resistance between stator windings and the shell before use. The resistance should not fall below 3×UN/1000 MΩ (UN represents rated voltage in volts). If insufficient, dry the motor until the resistance meets the required level.
6.3 During the installation of the motor, it is crucial to ensure that the motor's centerline perfectly aligns with that of the transmission machine to prevent any potential damage. Carefully inspect the coupling or spur gear screws and pins to confirm they are not loose. Check if the machine operates smoothly without any jamming or producing abnormal sounds.
6.4 Ensure that the motor's bolts are securely fastened, and verify if the casing of the motor is grounded reliably or if there is a potential grounding issue.
6.5 For variable frequency motors using a B5 installation with forced ventilation, it is important to support the motor with the appropriate bracket to guarantee a stable and correct installation.
6.6 Verify that all protection devices meet the necessary requirements and ensure a reliable installation.
6.7 Confirm the starter wiring is correct, assess the flexibility of the starting device, and ensure its metal casing is grounded reliably or identify any grounding issues.
6.8 Check the status of the 3-phase voltage to ensure it is normal. Evaluate for any signs of high, low, or asymmetric voltage levels.
6.9 Inspect the bearing and lubrication system thoroughly. If the lubricant is insufficient, dry, or contaminated, it is imperative to properly supply, clean, or replace it as necessary.
6.10 Connection between Motor and Power
6.10.1 The motor's junction box is positioned at the top. The junction box's entry point (horn mouth for rubber cable, pipe thread for steel or armored cable) must align horizontally with the junction box. By rotating the junction box 180°, the line can enter from the opposite side. Choose the correct cable based on the motor's current usage and working conditions.
6.10.2 Motor Wiring Methods:
6.10.2.1 Wiring Diagram for Single-Speed Motor
Figure 8: Three-Terminal Wiring Diagram
a) The junction box contains three terminals, labeled U, V, and W. Refer to Figure 8 for the wiring method.
b) Motors with six terminals in the junction box can have their wiring adjusted via linking pieces to accommodate two different voltage types. Terminal symbols include U1, U2, V1, V2, W1, and W2. Follow the nameplate voltage for wiring instructions. Refer to Figure 9 for the wiring method.
Figure 9: Six-Terminal Wiring Diagram
△ connection for low voltage, Y connection for high voltage

c) Temperature measurement for stator winding and heater. The outgoing line can be located in the main terminal box or in a separate terminal box. Refer to Figure 10 for the outgoing line diagram.
Ensure that the motor phase sequence U, V, W matches the external power sequence A, B, C. When viewed from the shaft extension end, the motor should rotate clockwise. If the rotation does not meet requirements, swapping any two external power ends will alter the running direction.
6.10.3 When wiring, position the cable core between two arch washers or tension discs. The earth wire should be secured between the grounding bolt's arch gasket, ensuring a reliable earth connection and maintaining proper clearance.
6.10.4 Inspect the junction box for any debris or dust. Ensure wiring complies with voltage and nameplate specifications. Once correctness is verified, securely fix the junction box cover.
6.10.5 Ensure the cable entering the junction box is secured with a lathedog at the junction box's entry point to prevent loosening.
6.10.6 The external grounding bolts must ensure impeccable grounding reliability to guarantee safety and optimal operation.
6.10.7 For motors with specific rotation direction requirements, the rotation must adhere to the guidelines indicated by the auxiliary signs. In the event of any discrepancies, immediate adjustments should be made to comply.
6.10.8 After completing the wiring, a thorough verification should be conducted to eliminate errors before proceeding to the run-in phase. For motors equipped with an auxiliary fan, initiate the auxiliary blower motor first, followed by the main motor. During shutdown, the auxiliary blower motor should also be turned off first. It's crucial to check for any anomalies; once confirmed to be running smoothly, normal operation can resume.
6.10.9 Whether the motor operates under a load or without it, it should not emit any erratic or unusual sounds and vibrations, ensuring a quiet and efficient operation.
6.11 Attentions During Motor Startup
6.11.1 Upon energizing, if the motor fails to commence operation, it is imperative to switch off the power rapidly and decisively to prevent any potential damage.
Identify and rectify the underlying cause before attempting to restart the motor, thus avoiding the risk of burning out the motor.
6.11.2. In scenarios where multiple motors share the same inverter for power supply, staggered startups are essential. Start the motors sequentially in a descending order to prevent overload.
6.11.3. When employing voltage reduction to initiate the motor, ensure it is in a no-load or low-load state. The motor can be started twice when cold, but only once when heated, to maintain safety and performance.
6.11.4. For shutdown procedures involving motors with the IC416 forced ventilation configuration, first disconnect the power supply to the variable frequency motor. After a 10-minute interval, subsequently disconnect the power to the small motor of the forced ventilation system, to ensure a safe shutdown.
7. Maintenance and Repair of the Motor
7.1 Routine motor maintenance is crucial and includes both monthly and annual servicing, referred to as minor repairs and overhauls, respectively.
7.1.1 Monthly Service/ Minor Repair Tasks Include:
7.1.1.1 Thoroughly clean the motor to remove all dust and dirt, and measure the insulation resistance for optimal performance.
7.1.1.2 Inspect motor terminals: Ensure that bolts (nuts) on the junction box remain secure. If any are loose, they should be tightened or replaced as needed.
7.1.1.3 Inspect all bolts (nuts) and wires: Examine grounding bolts, the end-over, bolts on the inner and outer covers of bearings, and assess the connection and installation status of the grounding wire.
7.1.1.4 Conduct checks on bearings and the lubricant system: Evaluate if the lubricant is contaminated or depleted. Replenish or clean promptly if necessary, and replace if required.
7.1.1.5 Verify the condition of the motor fan: Check for any damage or loose, worn, or misaligned bolts (nuts), and replace them if needed to ensure the fan's integrity and performance.
7.1.2 Annual Maintenance or Overhaul Tasks Include:
7.1.2.1 All tasks covered in the monthly maintenance or minor repairs are included in the annual overhaul to ensure comprehensive care.
7.1.2.2 Exterior Examination of the Motor: Scrutinize for any damages, verify the completeness of spare parts, thoroughly clean all dust and dirt, and repair any damaged areas.
7.1.2.3 Interior Cleanup and Inspection of the Motor: Conduct a meticulous clean-up and check-up, ensuring every component within the motor is in excellent condition and functioning optimally.
(a) Begin by meticulously examining the stator windings for any sign of contamination or damage. Carefully remove dust and grime, ensuring a pristine surface. For greasy residues on stator windings, first gently wipe off with a dry cloth, followed by a careful rub using a cloth lightly infused with gasoline. Concurrently, assess the winding insulation for any hints of aging or detachment. Immediate repair and varnishing are crucial if issues are identified. (b) Assess the rotor windings for pollution or damage, checking for ruptures, contamination, or unwelded sections. (c) Scrutinize the iron core of both stator and rotor for any deformation; immediate repair is essential if distortions are detected.
7.1.2.4 Rigorous Inspection of Windings:
(a) Scrutinize the stator and rotor windings vigilantly for phase faults, interturn short circuits, open circuits, unsoldering, burnout, and similar issues. Address and repair the identified problems swiftly and thoroughly. (b) Conduct precise measurements of insulation resistance across all components using a megameter. Ensure the resistance value is consistently above 1MΩ, reflecting optimal insulation integrity.
7.1.2.5 Thorough Cleaning of Bearings and Evaluation of Wear Conditions: (a) Vigorously agitate the bearing within a gasoline vessel, ensuring comprehensive cleansing, then rotate and clean further in a separate gasoline vessel. When installing, employ the heating sleeve method, maintaining an oil temperature below 100 ºC , ensuring an even distribution of heat. (b) Rigorously evaluate the bearing surface, ball bearing, and axle ring for any discoloration indicating excessive heat or annealing; replace the bearing if deterioration is severe. (c) If feasible, precisely measure the bearing's internal and external diameters and width.
7.1.2.6 Comprehensive Run-in Post-Repair: If the motor windings are intact, conduct a 30-minute run-in post-overhaul. Meticulously measure insulation resistance and ensure all components function optimally before transitioning to load operations.
7.2 While operating, ensure the motor's bearing temperature remains below 95 ºC as monitored by a thermometer. Perform a full inspection post 2500 hours of bearing operation. If lubricant deterioration is detected, immediate replacement is imperative. Ensure thorough cleaning of residual oil from the bearing, utilizing gasoline for effective cleansing. Enhance assembly by directly adding grease to the bearing: For 2P motors, the grease should occupy 1/2 of the bearing chamber's net volume; for 4P and motors above standard, fill 2/3. While operating, replenish fuel via the oiling cup. For 2P motors, replenish every 2000 hours, while 4P and above require refueling every 3000 hours with 25 to 45g of grease. Adjust fuel capacity with seat number increase. Standard bearing grease is lithium-based: L-XBCHA3, with special grease requirements indicated on labels. 4P and above motor runs 3000h, need to fill 25 ~ 45g, the fuel capacity will increase with the increase of seat number. Bearing grease is lithium grease generally: L-XBCHA3, the special grease is indicated in the signs.
7.3 During disassembly and reassembly of the motor, ensure protection of processing surfaces using 204-1 antirust to prevent corrosion or damage.
7.4 When extracting or inserting the rotor, exercise utmost caution to protect stator windings and insulation from any potential damage.
7.5 When replacing windings, it is critical to update the winding data and insulation structure to avoid performance degradation, ensuring continued usability.
7.6 If the junction box's sealing ring shows signs of aging, replace it promptly to maintain optimal functionality.
7.7 If the V-shaft seal ring or framework oil seal on tandem axles is aging or wearing, ensure timely replacement to uphold efficiency and prevent operational issues.
7.8 Upon reassembling after disassembly, it is crucial to meticulously clean the explosion-proof surface. Ensure all small debris is removed, then apply 204-1 anti-rust grease generously. Furthermore, confirm that the joint surface is impeccably seamless, leaving no gaps for optimal safety and performance.
8. Common Troubles and Their Solutions:
8.1 Typical Electrical Issues and Their Resolutions are detailed in Table 3:
Table 3
8.2 Frequent Mechanical Failures and Their Remedies can be found in Table 4:
Table 4
9. Guidelines for Motor Storage and Transportation
9.1 Store in a dry warehouse, maintaining a stable ambient temperature between -15°C and +40°C with relative humidity not exceeding 90%. Ensure the air is free of corrosive gases, with excellent ventilation and consistent temperature control.
9.2 Avoid stacking too high during storage to prevent airflow obstruction and potential damage to packaging of lower units.
9.3 Motors must not be inverted during storage or transportation to ensure structural integrity and longevity.
9.4 The motor's axis extension requires protection; do not drag the motor by attaching a string to the axle extension, as this could cause damage.
9.5 Pay attention to safeguarding the oil cup, the bearing's temperature-measuring device and its wiring, the stator winding's temperature measurement, along with the anti-moisture heating device and its wiring, to ensure flawless operation and reliability.

 

Q1: Is customized service available?

A1: Of course, OEM & ODM both are available.


Q2:Can I buy one as sample?

A2: Yes, of course.



Q3: How about your quality control?

A3: Our professional QC will check the quality during the production and do the quality test before shipment.

Q4: What is your payment term?

A4: 30% T/T in advance, 70% balance when receiving B/L copy Or 100% irrevocable L/C at sight.


Q5: What is your lead time?

A5: About 20-30 days after receiving advance deposit or original L/C.


Q6 What certificates do you have?

A6: We have CE, ISO. And we can apply for specific certificate for different country such as SONCAP for Nigeria, COI for Iran, SASO for Saudi Arabia, etc.


Q7: What warranty do you provide?

A7: One year, during the guarantee period, we will supply freely of the easy damaged parts for the possible problems except for the incorrect operation. After expiration, we supply cost spare parts for alternator maintenance.