Durable Wolong Electric Motor with Adjustable Speed Features OEM/ODM

• Customization: Available
• Application: Industrial
• Speed: 0-6000r/Min
• Model NO.: YBBP
• Number of Stator: Three-Phase
• Function: Driving
• Casing Protection: Explosion-Proof Type
• Number of Poles: 2p-12p
• Starting Mode: Auto-induction Voltage-reduced Starting
• Certification: CCC
• Brand: Wolong
• Transport Package: Wooden Box
• Trademark: WOLONG
• Origin: China
• HS Code: 8501610000
• Production Capacity: 5000picese/Year
• Package Size: 100.00cm * 100.00cm * 100.00cm
• Package Gross Weight: 3000.000kg

Product Description

Product Description

 

Presenting the YBBP Series Featuring Flameproof Frequency Control Speed
This Three-phase Asynchronous Motor
is available in (ExdIIBT4 Frame No.80~450 )
The Series YBBP is meticulously crafted according to "The technical conditions of Explosion-proof"(dII)standards for Frequency Control Speed Three-phase Asynchronous Motor ( Seat No. 80-450) outlined in Q/NF201.2 enterprise standards.
This phenomenal explosion-proof performance of the series Explosion-proof Three-phase asynchronous motor adheres strictly to the national standards GB3836.1 , and GB3836.2 < The electric equipment used in explosive gas atmosphere Part 2: Explosion-separate type "d">
Safety Warnings
1. Ensure to carefully read the "Instruction for use" prior to operation.
2. Avoid removing any parts while the motor is active.
3. After repairs, secure all fastening screws and bolts thoroughly during reassembly.
4. For replacement of any corrosive or damaged explosion-proof parts, contact the manufacturer to ensure safety, do not substitute them independently.
5. It is imperative that the motor be used with a suitable transducer and temperature-control measures to monitor and maintain surface temperature, preventing it from exceeding safe limits.
6. The IC411 cooling method is ideally suited for fans and pumps (excluding Roots blowers and hydraulic pumps) with square law (or square minus the torque) load features.
1.Summary
1.1 The YBBP Explosion-proof frequency control speed three-phase asynchronous motor (herewith referred to as: Motor) is meticulously designed for environments with explosive gases, serving as a reliable driving unit.
1.2 Notice the distinct and permanent "Ex" mark on the nameplate's upper right corner and its casing. An explosion-proof mark is also present on the nameplate: divided into type, mark, and classification.

2. Motor type and its significance
2.1 This guide applies to the YBBP80~450 series motor:
2.2 Codes pertaining to motor type:
3. Operational conditions for the motor
3.1 Appropriate environmental conditions:
3.1.1 The elevation should not exceed 1000m.
3.1.2 The ambient temperature fluctuates with the seasons and does not surpass +40ºC.
3.1.3 The minimum ambient temperature is -15 ºC.
Note: Should the motor operate at altitudes over 1000m or if ambient temperatures rise above or drop below the maximum of +40 ºCEnsure all installations and operations align with the stringent standards set forth in GB755 for optimal performance and compliance.
4.2.4 The peak of ambient humidity challenges: 90% average relative humidity during the most humid month, with monthly average lows not exceeding a comfortable 25 ºC, ensuring a safe and efficient operational environment.
4.2.5 Suitable for areas with flammable gases within the T1 to T4 ignition temperature groups, or where explosive vapor and air mixtures may form, offering safety and reliability.
3.2 Discover the robust electrical capabilities of our motor:
3.2.1 Motor's rated frequency stands at 50Hz. The versatile frequency range for 2-pole motors is 3 to 60Hz, and for 4-pole and above, it's 3 to 100Hz, delivering constant torque between 3-50Hz and constant power above 50Hz.
3.2.2 Frame No. 132 and below offer rated voltages of 380V or 660V; Frame No. 160 to 225 offers 380/660V. For Frame No. 250 and above, enjoy the flexibility of 380/660V, or 660/1140V. When operating at 380/660V, utilize three-phase AC variable frequency power with corresponding voltage ratings. At 660/1140V, opt for three-phase AC variable frequency power with respective voltage ratings to maintain efficiency.
3.2.3. For optimal use, pair the motor with a compatible inverter, either current type or voltage type. We
recommend selecting an explosion-proof inverter matching the motor's level for safety. If opting for a non-explosion-proof inverter, ensure its placement in secure, risk-free environments. For distances over 10m between the inverter and motor, enhance performance by adding a filter at the inverter's output to reduce harmonics. Should motor vibration increase at specific frequencies, adjust via inverter settings to bypass problematic frequency bands. Maintain harmonic content below 5% and ensure that pulse amplitude rated voltage at motor terminal does not exceed 2.2 times, with a voltage rise time of over 400ns at the motor terminal.
3.2.4 Designed for S1, a continual working system ensuring uninterrupted performance.
3.2.5 Employing advanced stator windings with your choice of Grade or F Grade insulation systems for superior reliability.
3.2.6 Small motors enjoy forced ventilation powered by independent three-phase AC power at 380V or 660V and 50Hz, with customizable voltages to meet specific user needs.
3.2.7 Utilizing IC411 cooling method with FM range 3 to 60Hz for square law load applications (square reduce torque load) and IC416 cooling for constant torque load (3-50Hz) or constant power load (50Hz and above). Mechanical load properties illustrated in Figures 1 to 3, with comparison of frame number, power, and rotational speed detailed in Table
1 for clarity.

Frame No.	Synchronous speed  r/min
	3000-2P	1500-4P	1000-6P	750-8P	600-10P	500-12P	429-14P	375-16P
	Power kW
80M1	0.75	0.55	0.37	0.18
80M2	1.1	0.75	0.55	0.25
90S	1.5	1.1	0.75	0.37
90L	2.2	1.5	1.1	0.55
100L1	3.0	2.2	1.5	0.75
100L2		3.0		1.1
112M	4.0	4.0	2.2	1.5
132S1	5.5	5.5	3	2.2
132S2	7.5
132M1	-	7.5	4	3.0
132M2	-		5.5
160M1	11	11	7.5	4.0
160M2	15			5.5
160L	18.5	15	11	7.5
180M	22	18.5	-	-
180L	-	22	15	11
200L1	30	30	18.5	15
200L2	37		22
225S	-	37	-	18.5
225M	45	45	30	22
250M	55	55	37	30
280S	75	75	45	37
280M	90	90	55	45
315S	110	110	75	55	45	37	30	22
315M	132	132	90	75	55	45	37	30
315L1	160	160	110	90	75	55	45	37
315L	185	185	-	-	-	-	-	-
315L2	200	200	132	110	90	75	55	45
355S1	(185)	(185)	160	132	90	75	75	55
355S2	(200)	(200)
355M1	(220)	(220)	(185)	160	110	90	90	75
355M2	250	250	(200)		132	110	110	90
355L1	(280)	(280)	(220)	185	160	132	132	110
355L2	315	315	250	200	185	160
400S	355	355	280	220	185	185	160	132
					200
400M	400	400	315	250	220	200	185	160
400L	(450)	450	355	280	(250)	220	200	185
450S	450	450	355	315	250	220	200	185
450M	500	500	400	355	280	250	220	200
450L1	560	560	450	400	315	280	250	220
450L2			500		355
450L2			560

Note: If environmental or electrical conditions deviate from paragraph 3.1 and 3.2, refer to the motor's nameplate and signage for precise requirements.
4 Structural Insights:
4.1 Main-body casing protection is rated at IP55, assuring robustness, with detailed explosion-proof structuring depicted in Attached Figure 1 for comprehensive understanding.
4.2 Elevating the standard of motor design, the stator windings are crafted with polyester lacquer-coated round copper wire. These windings, integrated into the stator core, undergo VPI dipping lacquer treatment, merging them into one cohesive unit. This process ensures outstanding electric, mechanical, and moisture-resistant performance, alongside remarkable thermostability. The rotor, a squirrel-cage type, is securely affixed to the axis using a precision hot jacket method, followed by balance adjustments for stable operation with minimal vibration.
4.3 Versatility in mind, this series of motors offers basic structure and installation types including IMB3, IMB35, IMB5, and IMV1. Tailored configurations can be crafted to meet unique user specifications.
4.4 Engineered for superior cooling, the motor utilizes either the IC411 fully-sealed natural cooling fan or the IC416 forced ventilation system, catering to diverse operational needs.
4.5 Designed with precision, the motor features a cylindrical axle extension that seamlessly integrates with coupling or spur gear systems. When paired with a spur gear,, the pitch diameter should maintain a minimum ratio of three times the axle extension diameter. For bespoke applications, options for producing dual axle-extension motors or specialized axle-extension designs are available, aligned with ordering requirements.
4.6 Strategically positioned, the motor's junction box sits atop the seat. It accommodates three terminals for single-phase voltage or six for double voltage systems. In configurations using a double-inlet junction box, external wiring is isolated; the unused inlet is sealed with a plug and secured with metal gaskets of at least 2mm thickness. Compressed onto the sealing ring, this ensures the junction box's explosion-proof integrity. Dedicated outlets are provided for PTC or PT100 temperature sensors. A separate plated screw inside the terminal box facilitates internal grounding. The outlet accommodates rubber cables, steel pipe wiring, and explosion-proof flexible pipes (armored cable), boasting an IP55 protection class. The junction box architecture is illustrated as Attached figure 2-3.
4.7 Equipped with state-of-the-art stator winding temperature devices, the motor requires users to configure a temperature protection system. This device should disconnect power when the stator winding temperature hits 1400 ºC, thus preventing the motor's surface temperature from surpassing safe limits. Furthermore, optional enhancements include bearing temperature sensors based on user requirements. The temperature-measuring junction box structure is depicted as Attached figure 3.
4.8 Designed for reliability, the motor incorporates rolling bearings, with trademarks specified on the nameplate. The shaft-through sections utilize a framework oil seal, V shaft sealing ring, or skeleton oil-sealing structure for optimal performance.
5. Tips for Maintaining Explosion-Separated Motor Integrity
5.1 In the design phase, comprehensive considerations ensure that should an explosive mixture infiltrate the motor and detonate, it will not trigger external explosions. Dust ingress is prevented, maintaining the motor casing's robustness and forming explosion-resistant interfaces. Additionally, controlling the permissible diameter difference, length, and dangerous temperatures further enhances the motor's explosion-proof and separation capabilities.
5.1.1 The Critical Role of Explosion-Proof and Explosion-Separation:
Ensuring safety, the specified clearances and creepage distances between each explosion-proof interface, along with those between bare conductors within the junction box and exposed conductors to the metal casing, are detailed in Attached figure 2-3.
5.1.2 The motor's surface temperature, when operating under defined conditions, meets the guidelines of Table 2. Moreover, the cable's intake temperature must not surpass its permissible limit, ensuring reliable cable performance.
Table 2

Group of explosive mixture		T1	T2	T3	T4
Highest permitted temperatureof motorsurface (ºC)	W, WTA, WTH, WF1, T, TA,H	440	290	190	125
	Indoor,TH(indoor humid tropics)	450	300	200	135

5.2 To ensure optimal explosion-proof performance of the motor's casing, always use tightening washers with bolts. This prevents self-loosening. Post-fastening, ensure there is a gap between the bolt and its base. The metal thickness around the airtight screw must be no less than 1/3 of the worm aperture, with a minimum thickness of 3mm.
5.3 When introducing cables into the motor's junction box, secure them with an elastic sealing ring in the inlet. The sealing ring, with a Shore hardness of 45~55°, must match the dimension in Figure 7 and meet the aging test criteria of appendix D3.3 of GB3836.1. The cable's diameter should align with the sealing ring's pore. Its concentric grooves allow adjustments for different cable sizes. Upon compressing the junction box hopper, ensure zero gaps between the sealing ring, cable, and the box seat to maintain explosion-proof integrity.
5.4 The junction box's terminal sheath and connection board's insulation parts utilize grade II insulation materials, ensuring high safety and performance.
5.5 Grounding: This motor's grounding system is creepage-proof, a critical safety measure. The grounding terminal is a clearly marked steel or copper galvanized bolt on the crust, ensuring easy identification and connection.
5.6 Explosion-proof components include: Seat, end cover, axis (rotor), inner cap of bearing, outer cover of bearing, seat of junction box, cover of junction box, wiring bolt, terminal sheath, connection board, sealing ring, as illustrated in Attached figure 1-4.
6. Operation and Use Requirements of Motor
6.1 Preparation Before Installation
Ensure the packaging is unbroken before you start unpacking.
6.1.2 After unpacking, meticulously clean the motor's dust and remove any rust from the axle edges.
6.1.3 Verify the nameplate (including any auxiliary signs) aligns with both the order contract and the on-site conditions.
6.1.4 Prior to installation, confirm the following items meet specifications; non-compliance prohibits usage.
a) Ensure the presence of explosion-proof markings and a certificate number, verifying that these markings suit the environmental criteria for both explosive gases and flammable dust.
b) Confirm all bolts are firmly tightened and spring washers are secure; check connections for proper fitting.
c) Inspect for cracks or flaws in explosion-proof parts that might compromise performance (skip this for new motors).
d) Ensure the oil pipe remains unobstructed.
e) For motors equipped with bearing temperature sensors, ensure that sensor wires at the fan end do not touch the fan to prevent accidents.
6.2 For motors subjected to long-distance transport or those unused for extended periods, verify the insulation resistance between stator windings and the shell. This resistance should exceed 3×UN/1000 MΩ (UN as rated voltage, unit V). If lower, dry the motor until it achieves the specified insulation resistance.
6.3 During the installation of the motor, it is paramount to maintain alignment by ensuring the motor's center line is consistent with the transmission machine's center line to prevent damage. Meticulously inspect the coupling or spur gear for any looseness in screws and pins. Verify the machine's operational status, ensuring there is no jamming or abnormal sounds.
6.4 Conduct a thorough inspection to confirm the motor bolts are firmly secured and that the outer casing is properly grounded, ensuring an effective earth connection.
6.5 For B5 installation of variable frequency motors accompanied by a forced ventilation motor, it is crucial to support it with a suitably designed bracket to ensure the motor's stable installation.
6.6 Verify that the protection device adheres to all stipulated requirements and that its installation is robust and reliable.
6.7 Ensure correct wiring of the starter, and that the starting device operates flexibly. Additionally, verify that all metal casings are securely and reliably grounded.
6.8 Confirm that the 3-phase voltage is within normal parameters, checking for any instances of excessive, insufficient, or asymmetrical voltage.
6.9 Inspect the bearing and lubrication system to ascertain if the bearing lubricant is sufficient. In instances where it is deficient or dry, promptly replenish, clean, or replace the lubricant as required to maintain optimal operation.
6.10 Establishment of the Motor and Power Connection
6.10.1 The junction box sits atop the motor, where the hopper configuration-whether rubber-cable horn mouth or pipe-threaded steel/armored cable-connects horizontally to the junction box. By rotating the junction box 180°, line introduction from the opposite side becomes feasible. Choose the cable judiciously, aligning it with the motor's current usage and operational conditions.
6.10.2 Methodology for Motor Wiring:
6.10.2.1 Wiring Diagram for Single-Speed Motors
Figure 8: Wiring Configuration for Three Terminals
a) The junction box houses three terminals, labeled U, V, W. Refer to Figure 8 for the wiring configuration.
b) For motors equipped with six terminals in the junction box, wiring can be altered using a linking piece to accommodate dual voltage requirements, denoted by symbols U1, U2, V1, V2, W1, W2. The wiring method should adhere to the voltage detailed on the nameplate. The wiring diagram is illustrated in Figure 9.
Figure 9: Wiring Configuration for Six Terminals
△ Connect for Low Voltage, Y Connect for High Voltage

c) Temperature Measurement ofthe stator winding and heater: The outgoing lines can either be housed within the main terminal box or allocated a separate terminal box. The line diagram is demonstrated in Figure 10.
The motor's phase-sequence-U, V, W-must align with the external power's phase-sequence-A, B, C. Observing from the shaft extension end, the motor should rotate clockwise. Should the rotation direction be contrary to requirements, switch any two ends of the external power to correct the running direction.
6.10.3 In wiring, ensure the cable core is positioned between two arch washers or tension discs. The earth wire must be securely placed between the grounding bolt's arch gasket, ensuring a reliable earth connection to meet contact and clearance requirements.
6.10.4 Perform a diligent check for any foreign objects or dust within the box. Ensure that the wiring adheres strictly to the voltage and nameplate stipulations before securing the junction box cover.
6.10.5 Securely fix the cable entering the junction box with a lathedog on the hopper to prevent any loosening.
6.10.6 Ensure the external grounding bolts are thoroughly and reliably earthed, promoting enhanced safety and operational integrity.
6.10.7 For motors with directional rotation requirements, ensure alignment with the specified auxiliary indicators. In cases of deviation, prompt adjustments are necessary to maintain optimal performance.
6.10.8 After wiring, thoroughly inspect for any discrepancies to ensure flawless operation. For motors equipped with auxiliary fans, initiate the auxiliary blower motor first, followed by the main motor. Upon shutdown, the sequence should reverse, ensuring preliminary checks for irregularities before resuming operation.
6.10.9 Whether operating under load or no-load conditions, the motor should function smoothly, free from any sharp or unusual noises and vibrations, ensuring a seamless experience.
6.11 Essential Considerations for Motor Start-Up
6.11.1 If the motor fails to start upon activation, it is crucial to swiftly disengage power to
prevent potential motor damage. Once the issue is diagnosed and resolved, proceed with a restart.
6.11.2 For systems where multiple motors share an inverter power source, staggered start-ups are crucial. Initiate motor start sequentially, prioritizing in descending order.
6.11.3 When commencing motor operations with reduced voltage, ensure operations are under no-load or partial load. A maximum of two starts is permissible from a cold state, and only one from a heated state for optimal safety.
6.11.4 For motors featuring an IC416 forced ventilation design, disconnect the variable frequency motor's power first during shutdown. Wait 10 minutes before cutting off the forced ventilation system, safeguarding motor integrity.
7.Comprehensive Motor Maintenance and Repair
7.1 Routine motor maintenance involves both monthly services, known as minor repairs, and annual services, referred to as overhauls.
7.1.1 Monthly Service / Minor Repair Checklist:
7.1.1.1 Remove accumulated dust and debris on the motor, and evaluate insulating resistance to ensure optimal functionality.
7.1.1.2 Inspect motor terminals: Ensure the bolts or nuts on the junction box are secure; tighten or replace if required.
7.1.1.3 Evaluate the condition of all connecting bolts, nuts, and wires. Pay special attention to grounding components and the integrity of bearings, checking the grounding wire's connection and ensuring all fastenings are secure.
7.1.1.4 Assess the motor's bearings and lubrication system: Check for contamination or insufficient lubricant levels. Replenish or replace as necessary for continued efficiency.
7.1.1.5 Inspect the motor fan for any signs of damage or wear. Confirm the stability of installation and the condition of bolts or nuts, replacing damaged components to prevent operational disturbances.
7.1.2 Annual Maintenance or Overhaul Detailed Protocol:
7.1.2.1 Annual maintenance or overhaul encompasses all tasks undertaken during monthly maintenance or minor repairs.
7.1.2.2 External inspection of the motor: Verify for any damage and ensure completeness of spare parts. Conduct a comprehensive cleaning and repair of any identified damages.
7.1.2.3 Internal motor inspection and cleaning: Maintain a pristine environment to support the motor's efficiency and reliability.
(a) Thoroughly inspect the stator windings for any signs of contamination or damage. Meticulously clean any dust and dirt from the stator. In cases of oily residue, initially wipe with a dry cloth and then utilize a cloth lightly moistened with gasoline to cleanse. Simultaneously, rigorously examine the winding insulation for indications of aging or degradation, and address any issues with timely repair and varnishing. (b) Evaluate the rotor windings for contamination or damage, checking for rupture, defilement, or unwelded areas. (c) Scrutinize the iron core of both the stator and rotor for any distortions. Should any distortions be detected, prompt repairs are essential.
7.1.2.4 Comprehensive Inspection of Windings:
(a) Conduct a detailed check to determine whether stator and rotor windings exhibit phase faults, inter-turn short circuits, open circuits, unsoldered connections, or burnouts. Prompt and precise repairs should address any identified issues. (b) Utilize a megameter to meticulously measure the insulation resistance of each component; it is imperative that each reading exceeds 1MΩ for optimal safety and performance.
7.1.2.5 Bearing Cleaning and Wear Inspection: (a) Gently agitate the bearing in a gasoline vessel multiple times, then invert it and repeat the cleaning in a separate vessel. During reassembly, employ the heating sleeve method to fit the bearing, ensuring the oil temperature remains below 100ºC, maintaining even heat distribution throughout; (b) Carefully examine the bearing surfaces, ball bearings, and axle rings for discoloration, which may indicate excessive heat and potential annealing. Replace bearings if damage is severe; (c) Where feasible, measure the bearing's inner and outer diameters, as well as its width, to ensure precise specifications.
7.1.2.6 Post-Repair Run-In: Once motor windings are verified as intact, initiate a 30-minute run-in post-overhaul. Measure insulation resistance and confirm all components operate smoothly before proceeding to load-bearing operations.
7.2 Monitoring Operating Conditions: Ensure that during motor operation, the bearing temperature does not exceed 95ºC (verified by thermometer). Inspect after 2500 hours of bearing operation. If lubricants have deteriorated, immediate replacement is necessary. Remove old oil residues from bearings and cleanse thoroughly with gasoline. Grease Addition Protocol During Bearing Assembly: For 2P motors, the fuel capacity should occupy half the net volume of the bearing chamber, while for 4P and higher standard electric motors, it should be two-thirds. When the motor is operational, add fuel using an oiling cup; 2P motors necessitate refueling after 2000 hours, 4P and higher motors after 3000 hours, requiring 25 to 45 grams. Fuel capacity must be adjusted in accordance with seat number increases. Lithium grease, specifically L-XBCHA3, is typically used unless otherwise specified.
7.3 Motor Disassembly and Assembly: Apply 204-1 antirust to processing surfaces to safeguard against rust and potential damage during these procedures.
7.4 Rotor Handling Precautions: Exercise utmost care when removing or inserting the rotor to avoid causing damage to the stator windings and insulation.
7.5 Winding Replacement Considerations: Altering winding data or insulation structure during replacement may degrade some performance characteristics, rendering them unsuitable for use.
7.6 Junction Box Maintenance: Promptly replace the sealing ring if signs of aging are detected to ensure optimal performance.
7.7 Seal Ring Maintenance: Timely replacement of aged or worn V-shaft seal rings or framework oil seals on tandem axles is crucial for maintaining ideal operational integrity.
7.8 During reassembly after disassembly, it is imperative to meticulously cleanse the explosion-proof surface, ensuring the absence of any minute debris. Subsequently, apply 204-1 anti-rust grease generously, guaranteeing an impeccable, seamless joint surface without any gaps.
8. Common Troubles and Their Solutions:
8.1 The most frequently encountered electrical issues and their solutions are detailed in Table 3 below:
Table 3

Phenomenon	Cause	Solution
1,The motor doesn't start.	1) Haven't put through the power	1) Check the switch, melt, every contact point as well as the tie-in of leading wire
	2) The winding turns off.	2)  Heat the turnoff parts up to a certain temperature that insulation grade permit, soften the paint, then choose the wire-break, reweld and tie it up well, then paint and dry.
	3) The winding earth or interturn short circuit	3) The solution is the same as above, just only need to insulate on the earth or short circuit parts, and then paint and dry.
	4) The wiring of windings is wrong	4) Check the wiring diagram, connect well according to the correct method after heating up the ends (including binding, insulation and paint)
	5) The melt is burned out	5) Find out the reason and fix the breakdown, match the new melt according to the specification of motor
	6) the wiring of control device is wrong	6) adjusts the wiring
2, After the motor is switched on, the melt is burnt out.	1) single-phase starting	1) Check the power wire, the leading wire, fuse, every contact points of switch and find out the broken wire or breakdown to repair.
	2) The motor overload or is blocked.	2) Adjust the load to the rated value, and get rid of  the mechanical trouble
	3) The melt section is too small.	3) It doesn't work for the melt to the overload of motor, should choose the melt according to the following equation generally: Rated current of melt = Starting current/(2~3)
	4) short circuit between the power and motor	4) Check the short-circuit place and then repair.
3, The motor doesn't start with humming soundafter switching on.	1) The motor overload or is blocked.	1) Check the equipment and fix the breakdown
	2) Haven't put through the power completely	2) Replace the melt of fuse; screw on the loose bolts; Find out the broken wire and trouble with the multi-meter and then repair.
	3) The voltage is too low.	3) if connect Y coupling by mistake instead of △ coupling, when the voltage is too low, should contact with the power supply department to solve, if voltage-dropping of power circuit is too large and cause the voltage is too low, should replace the thick cable.
	4)  For minitype motor, the lubricant is hard or the assembly is too tight	4) Chooses the appropriate lubricant to improve the quality of assembly
4, The crust of motorhas electricity.	1) Make mistake for the power wire and the grounding wire.	1) correct the mistake
	2) The windings of motor are affected with damp, insulation is bad aging.	2) Dry the motor, and replace the aging insulation.
	3) The leading wire and junction box earth	3) Wrap up or renewal the insulation of leading wire, repair the junction box.
5, It is difficult to start the motor, but its rotating speed is lower than rated rotate speed after adding the rated load.	1) The power voltage is too low	1) Check the voltage of inputting end with the voltmeter or multi-meter and then handle with it.
	2) Connect Y coupling by mistake instead of △ coupling	2) Change them.
	3) The cage rotor welds out or ruptures.	3) Repair it after checking
	4)The windings are too much when rerolling.	4) Rerolling according to correct winding number.
6, The insulated  resistance is low	1)The windings is affected with damp or is caught by rain.	1) Heat or dry it.
	2)The insulation of windings is aging	2) May clean and dry it for using if can continue to use through checking. If insulation is aging and can't run safe, then need to replace the insulation.
7, Send out the cacophony, abnormal while the motor is running.	1) The bearing is worn out, with breakdown	1) Overhaul or replace the new bearing
	2) The iron cores of stator and rotor are loose.	2) Check the vibration reason, reimpact the iron core.
	3) The voltage is too high or unbalanced.	3) Measure the voltage, find out the reasons and fix it.
	4) The bearing lacks the lubricant	4) Clean the bearing, add the lubricant and make it fill in 1/2~1/3 of the bearing room.
	5) The fan runs into its cover or the air tunnel is stopped up.	5) Repair the fan and cover, with correct size, clean up the air tunnel.
	6) the air gap is uneven, the stator abrades the rotor each other.	6) Adjust the air gap and improve the assembly quality
8, The motor is superheating or smoking.	1) The voltage of power is too high and makes the density of iron core supersaturate, and cause the temperature to be high.	1) if the voltage surpasses the standard too much, should contact with the power supply department to solve.
	2) The voltage of power is too low, the temperature of motor is too high under the rated load.	2) If caused by the voltage of power wire, can replace more thick wire. If caused by the lower power voltage, can contact the power supply department, and enhance the power voltage
	3) The iron cores of stator and rotor abrade each other.	3) Check the reasons of trouble, if the gap between bearings exceeds the limit, then should replace the bearing; If the rotating axis is curving, then must straighten it, if iron core becomes loose or distort, should handle with it in time and fix the trouble.
	4) The motor overloads or the mechanical resistance is too large and cause the motor to heat.	4) Fix the mechanical breakdown, reduce the resistance, according to the indication of current, if surpass the rated current, must reduce the load and replace a motor of large capacity or limit the capacity.
	5) It is frequent to start the motor or it is too much for the times of forward and reverse.	5) Reduce the times of starting and forward and reverse times, or change the proper motor.
	6) The fan is in trouble with bad ventilation.	6) Check whether the fan is damaged, check whether the fan blade is distorted or unfixed well, when necessary, should replace the fan.
9, The current is too unbalanced while the motor runs in.	1)The power voltage is unbalanced	Measure the voltage and find out the reasons.
	2) The windings are in trouble, like as interturn short circuit, some winding is connected in reverse, etc.	2) Disassemble the motor and check the pole and trouble, and then correct or fix the breakdown.
	3) While rerolling, the numbers of three-phase windings are uneven.	3) Reroll

8.2 The prevalent mechanical malfunctions along with their resolutions are illustrated in Table 4:
Table 4

phenomenon	Cause	Solution
1, The motor vibrates	1) The bearings are worn out, the clearance is unqualified	1) Check the clearance of bearings.
	2) The air gap is uneven	2) Adjust the air gap and make it conform to the stipulations
	3) The rotor is unbalanced	3) Check the reasons, rid up and screw on every part and then proofread the balance.
	4) The rigidity of crust is insufficient	4) Find out the weakness and reinforce the rigidity
	5) The foundation intention is insufficient and the installment is uneven	5) Reinforce the foundation, level up the foundations and finally fasten it.
	6) Fan is unbalanced	6) Overhaul the fan and proofread the geometry shape or balance
	7)The rotating axis is curving	7) Align the rotating axis
	8) The rotor core distorts or looses.	8) Proofread the iron core and then install it again.
	9) The foundation bolts of motor are loose.	9) Screw on the foundation bolts or replace the unqualified foundation bolts.
2, the bearing overheats.	1) The lubricant is too much or too little.	1) Add the lubricant correctly according to the instruction.
	2) The quality of oil is bad with impurities.	2) Check the oil to see whether it contains the impurities and replace the pure lubricant.
	3) It is too tight for the oil seal.	3) Replace or repair the oil seal
	4) The inner cover deflects and abrades the axis	4) Repair the inner cover of bearing and keep it proper gap with the axis.
	5) The end covers on both side of motor or the covers of bearings are uneven.	5) Install them correctly and screw on the bolts
	6)  The bearing is worn and torn with something wrong and sundries, etc.	6) Replace the damaged bearings; Clean out the bearings with sundries, replace the lubricant
	7) The connection of motor and transmission system deflects or the transmission belt is too tight.	7) Adjust the center line and the tension of transmission belt.
	8) It is improper to choose for the bearing, it's too large for the load that the rolling device bears while overloading.	8)Choose the appropriate bearing type
	9)  The gap clearance between bearings is too large or too small.	9) Replace the bearing

9. Storage and Transportation of the Motor:
9.1 Store in a dry warehouse, maintaining an ambient temperature between -15°C and +40°C, with relative humidity not exceeding 90%. Ensure the atmosphere is free from corrosive gas, with excellent ventilation and a stable temperature.
9.2 Avoid stacking too high during storage to ensure proper ventilation and prevent damage to the packaging of the products beneath.
9.3 Motors must never be inverted during storage or transportation.
9.4 Protect the shaft extension diligently; do not lift the motor by attaching strings to the shaft extension.
9.5 Take care to protect the oil cup, the bearing's temperature-measuring device and its wires, the stator winding's temperature-measuring equipment, and the anti-moisture heating device along with its wires.

FAQ

 

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.