Wolong Flameproof AC Motor with Advanced Frequency Controloem/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

 

YBBP Series Flameproof Frequency Control Speed
Three-phase Asynchronous Motor
(ExdIIBT4 Frame No.80~450 )
The YBBP Series is meticulously crafted following "The technical conditions of Explosion-proof" standards(dII)Frequency Control Speed Three-phase Asynchronous Motor (Seat No. 80-450) as outlined in the esteemed Q/NF201.2 enterprise standards.
This series of Explosion-proof Three-phase asynchronous motors boasts compliance with national standards GB3836.1 , GB3836.2 ensuring unparalleled safety and reliability.
Safe Warnings
1. Please ensure you thoroughly read the "Instruction for Use" handbook before operation.
2. Avoid dismantling any components while the power is on.
3. Post-repair, ensure all fastening screws and bolts are securely tightened.
4. In cases where explosion-proof parts are damaged or corroded, it is imperative to contact the manufacturer for replacement rather than substituting parts independently.
5. Pair the motor with a suitable transducer and implement effective temperature control measures to maintain surface temperature within safe limits, mitigating any explosion risk.
6. Featuring the IC411 cooling method, the motor is primarily designed for applications in fans and pumps (excluding Roots blowers and hydraulic pumps) with square law load characteristics.
1.Summary
1.1 YBBP The Explosion-proof frequency control speed three-phase asynchronous motor (abbreviated as: Motor) is engineered for use in environments with explosive gases, providing reliable and efficient drive capabilities.
1.2 The nameplate prominently displays a permanent protruding mark "Ex" in the upper right corner, accompanied by an explosion-proof classification mark for easy identification: encompassing mark, type, and classification.

2, Motor type and its meaning
2.1 This instruction applies to the YBBP80~450 series motor:
2.2 Codes of motor type:
3. The use conditions of motor
3.1 Conditions for used environment:
3.1.1 Installation is suitable for elevations up to 1000m.
3.1.2 The ambient temperature varies seasonally but remains below +40ºC.
3.1.3 Minimum ambient air temperature is -15 ºC.
Note: If the motor is to be used at altitudes over 1000m or in environments where the ambient temperature exceeds +40 ºCTo ensure optimal performance and compliance, the product specifications must strictly adhere to the illustrious provisions of GB755, setting the gold standard.
4.2.4 Delight in the naturally humid conditions where the monthly average maximum relative humidity of the most humid month graciously settles at 90%. The minimum temperature during this moisture-laden month comfortably remains below a balmy 25 ºC.
4.2.5 This motor is engineered to safely operate amidst flammable gases belonging to the T1 ~ T4 group, where ignition temperatures demand unwavering attention. It thrives in environments where explosive mixtures with vapor and air might form.
3.2 Embrace the dynamic electric conditions of the motor, engineered for precision.
3.2.1 The motor's rated frequency is a steady 50Hz. Revel in the flexible frequency range: 2 pole motors span 3 ~ 60Hz, while 4 pole and above motors stretch to an adaptable 3 ~ 100Hz. Experience constant torque from 3-50Hz, with a seamless transition to constant power at frequencies 50Hz and above.
3.2.2 Frame your power needs with precision. Motors with frame No. 132 and below are available at rated voltages of 380V or 660V. For frame No. 160 ~ 225 motors, choose from rated voltages of 380/660V. Frame No. 250 and above unleash power with 380/660V or 660/1140V options. At 380/660V, utilize three-phase AC variable frequency power matched to the rated voltage. For 660/1140V, similarly, match the three-phase AC variable frequency power to meet your high-demand performance standards.
3.2.3 Elevate performance with an expertly matched inverter. Whether current or voltage type,
choose an explosion-proof converter that mirrors the motor's explosion-proof level. For non-explosive-proof inverters, installation in safe environments is essential. Should the power line length exceed 10m, enhance performance with an output filter to minimize harmonic content in frequency power. If vibrations arise during frequency adjustments, simply bypass the specific frequency band via the inverter. Keep harmonic content below 5%, with pulse amplitude constraints at motor terminals not exceeding 2.2 times the rated voltage. Ensure voltage rises at terminals occur over a gentle 400ns.
3.2.4 Engineered for endurance, the motor operates in an S1 continual working system mode, ensuring relentless performance.
3.2.5 Choose between the robust stator windings of Grade or F Grade insulation systems for unmatched durability.
3.2.6 For smaller motors requiring forced ventilation, rely on independent three-phase AC power at 380V or 660V, with customizable voltage options available to meet unique user requirements. Experience steady performance at 50Hz rated frequency.
3.2.7 The versatile motor, utilizing IC411 cooling methods with an FM range of 3 ~ 60Hz, is ideally suited for square law loads. With IC416 cooling and an FM range of 3-50Hz, it excels in constant torque loads. At 50Hz and beyond, enjoy the continuous power load capabilities. Refer to Figures 1-3 for load mechanical properties and find detailed comparisons for frame number, power, and rotating speed in
Table 1

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: Should environmental and electrical conditions deviate from the specifications in paragraphs 3.1 and 3.2, refer to the motor's nameplate and sign for exact requirements. provisions of paragraph 3.1,3.2, see the requirements of nameplate and sign of the motor.
4 Discover the meticulously designed structure features
4.1 Marvel at the main-body crust's IP55 protective grade, with the explosion-proof structure elegantly detailed in Attached figure 1
4.2 The stator windings of the motor are crafted from premium polyester lacquer-coated round copper wire. These stator core windings undergo an advanced VPI dipping lacquer process, transforming them into a cohesive unit. This enhances the windings and insulation with superior electrical, mechanical, and moisture-proof performance, as well as excellent thermostability. The rotor, a robust squirrel-cage design, is expertly affixed to the axis using a precise hot jacket technique. This detailed balance revision ensures the motor operates with exceptional stability and minimal vibration.
4.3 The fundamental design and installation styles for this motor series include IMB3, IMB35, IMB5, and IMV1. Custom configurations can be crafted to meet specific user requirements.
4.4 The motor employs two innovative cooling strategies: the IC411 whole-seal natural cooling fan or the IC416 system with forced ventilation.
4.5 The motor features a robust cylindrical axle extension, seamlessly integrating with couplings or spur gears. When using spur gears,, ensure the pitch diameter is at least three times greater than the axle extension diameter. Tailored designs for double axle-extension or specialized axle-extension motors are available upon request.
4.6. The motor's junction box is strategically located atop the seat, equipped with three terminals for single-phase voltage applications. For dual voltage needs, a six-terminal configuration is available. In cases using a double-inlet junction box, single wiring is supported, with extra inlets sealed via a plugging rod. Both sides of the sealing ring are reinforced with metal gaskets of no less than 2mm thickness, compressed securely with the junction box hopper to ensure optimal explosion-proof performance. PTC or PT100 temperature-measuring devices have designated outlets. An individual steel or brass plated screw in the terminal box serves for internal grounding. The junction box accommodates rubber cables, steel pipe wiring, and explosion-proof flexible pipes (armored cable), boasting an IP55 protection class. The junction box structure is depicted as Attached figure 2-3.
4.7. The stator windings are equipped with temperature devices, essential for user-implemented temperature protection systems. Users should ensure power is cut when stator winding temperature reaches 140ºC ºC, to prevent motor surface temperature from exceeding limits. Additionally, temperature-measuring components for bearings can be integrated based on user requirements. The structure for the temperature-measuring junction box is shown as Attached figure 3.
4.8 The motor utilizes high-performance rolling bearings, with trademarks clearly displayed on the nameplate. The shaft's passage employs an advanced oil seal framework, V shaft sealing ring, or skeleton oil-sealing for enhanced integrity.
5. Tips for explosion-separate motor
5.1 In designing this motor, comprehensive considerations have been made to ensure that should an explosive mixture infiltrate and detonate within the motor, it will not cause external explosions. Stringent measures are in place to prevent dust intrusion, maintaining the motor's casing integrity and explosion-proof interface clearance. The design meticulously limits diameter differences, lengths, and prohibits dangerous temperatures to assure both explosion-proof and explosion-separation performance.
5.1.1 Importance of explosion-proof and explosion-separate:
The critical clearance and creepage distance between all explosion-proof interfaces, as well as between bare conductors inside the junction box and between exposed conductors and the metal casing, are demonstrated in Attached figure 2-3.
5.1.2 The permitted surface temperature that the motor runs under the stipulated working conditions conforms to the stipulations of Table 2, the intake temperature of cable is not higher than the allowed temperature of cable, so as to guarantee the cable can run reliably.
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

5.2In order to guarantee the explosion-proof performance of crust, the bolts must be installed the tighten washers to prevent the bolts from loosening by itself, after fastening the bolts and airtight screws, there should be space between the bolt and its bottom, the metal thickness around the airtight screw on the crust shouldn't be smaller than 1/3 of worm aperture, as least 3mm.
5.3 The cable introduced into the junction box of motor need to be sealed with elastic sealing ring in inlet, the Shore hardness of sealing ring is 45~55°, its size shows as Figure 7, its materials accord with the specified aging test requirements of appendix D3.3 of GB3836.1. the cable diameter entered into the junction box should match with the pore diameter of sealing ring, there are a couple of concentric circle grooves on the up of sealing ring, can adjust the pore diameter according to the diameter of cable, when compress the hopper of junction box, should ensure there isn't any clearance between the sealing ring and cable, the sealing ring and the seat of junction box, otherwise will lose the explosion-proof performance.
5.4 The terminal sheath in junction box or the insulation parts of connection board all adopt II grade insulation materials.
5.5 Grounding: Its grounding belongs to creepage-proof, it is the important safe measure. The grounding terminal on crust is steel or copper galvanized bolt, which is in the obvious place on the crust with the earthing sign " ".
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, shown as Attached figure 1-4.
6. Operation and use requirements of motor
6.1 Preparation before installing
Check whether the packaging is intact before unpacking.
6.1.2 Should clean out the dust on the motor and antirust on the edge of axle carefully after unpacking.
6.1.3 Check whether the nameplate (including assistant sign) accord with the requests of ordering contract and on-the-spot situation.
6.1.4 Must check the following items before installing, if does not conform to the requirements, and then doesn't be allowed to use.
a) Check whether there are explosion-proof mark and certificate number, and should check whether the explosion-proof mark conforms to the environmental requirements of explosive gas and flammable dust.
b) Check whether all bolts are tightened, the spring washers lose or not, check whether the connection between parts is proper;
c) Check whether there is any crackle at explosion-proof parts and the deficiencies that influence the explosion-proof performance (No check for the new motor).
d) Keep the oil pipe unimpeded.
e) For the motor with bearing temperature measuring, when set the temperature measuring up well, should avoid the leading line of temperature measuring device at the fan end from touching the fan, and causing the accident.
6.2 For the motor that has passed the long-distance transportation or has not use for a long time, must check the insulated resistance between the stator windings and shell before using, its value should not be lower than 3×UN/1000 MΩ (UN rated voltage, unit V), otherwise must dry the motor until the insulated resistance is up to the fixed value.
6.3 During the motor installation process, ensure that the motor's center line is perfectly aligned with that of the transmission machine, thus preventing any potential damage. Conduct thorough inspections to verify the secure fastening of screws and pins in the coupling or spur gear. Confirm that the machine operates seamlessly without any jamming or emitting abnormal sounds.
6.4 Ensure that all motor bolts are tightly secured, and verify that the motor's casing is effectively grounded for optimal safety and performance.
6.5 For B5 installation of the variable frequency motor with forced ventilation, take care to provide proper bracketing support. This guarantees a stable and precise motor installation.
6.6 Confirm that all protection devices meet the specified requirements, ensuring the reliability and safety of the installation.
6.7 Verify the correctness of the starter wiring, ensuring flexibility in the starting device. Confirm that metal casings are securely and reliably grounded.
6.8 Assess the 3-phase voltage to confirm that it remains within normal range, without any excessive highs, lows, or imbalances.
6.9 Regularly check the bearings and lubrication system. Ensure that the lubricant is not insufficient or dry, and replenish, clean, or replace it as necessary to maintain smooth operation.
6.10 Connection of Motor and Power
6.10.1 The junction box is positioned atop the motor, and its entry ports accommodate various cable types: rubber cables with a horn mouth, steel pipes with pipe threads, and armored cables with pipe threads. By rotating the junction box 180°, you can access lines from an alternate side. Choose cables that align with motor current usage and operating conditions for optimal performance.
6.10.2 Motor Wiring Methods:
6.10.2.1 Wiring Diagram for Single-Speed Motor
Figure 8: Wiring Diagram of Three Terminals
a) The junction box houses three terminals labeled U, V, and W. Follow the wiring method illustrated in Figure 8.
b) For motors with six terminals in the junction box, wiring can be adjusted through a linking piece to accommodate two different voltages, labeled as U1, U2, V1, V2, W1, W2. Refer to the nameplate voltage information for the correct wiring method as shown in Figure 9. The wiring method is depicted in Figure 9.
Figure 9: Wiring Diagram for Six Terminals
△ connect for low voltage, Y connect for high voltage

c) Temperaturemeasurement of stator winding and heater: Outgoing lines can be housed in the main terminal box or in a separate terminal box. Refer to Figure 10 for the outgoing line diagram.
The motor's phase sequence U, V, W must align with the external power phase sequence A, B, C. Viewing from the shaft extension end, the motor should rotate in a clockwise direction. If not, swap any two external power leads to correct the rotation direction.
6.10.3 When wiring, position the cable core securely between two arch washers or tension discs. Ground the earth wire effectively with the arch gasket of the grounding bolt, ensuring reliable contact and satisfying clearance requirements.
6.10.4 After wiring, inspect for any debris or dust within the box. Verify that wiring complies with voltage stipulations and nameplate details before securing the junction box cover.
6.10.5 Secure cables entering the junction box with a lathedog at the hopper to prevent loosening and ensure stable connectivity.
6.10.6. Ensure that the outer grounding bolts are firmly and reliably earthed, guaranteeing optimal safety and performance.
6.10.7. For motors with specified rotation direction, verify the rotation aligns precisely with the assistant sign. If discrepancies occur, promptly adjust to maintain compliance.
6.10.8. Post-wiring verification is crucial to ensure correctness before initiating the run-in process. For motors equipped with an auxiliary fan, initiate the auxiliary blower motor first, followed by the main motor. Upon shutdown, reverse the sequence by halting the auxiliary blower first, monitoring for any anomalies. Once confirmed normal, proceed with standard operations.
6.10.9. Regardless of load conditions, the motor should operate without emitting sporadic, unusual noises or vibrations, ensuring smooth and efficient functionality.
6.11. Key Considerations During Motor Start-Up
6.11.1. Should the motor fail to commence post-switch-on, promptly and decisively switch off to prevent potential motor damage.
Investigate the cause before considering a restart, safeguarding motor integrity.
6.11.2. When multiple motors share a single inverter for power supply, stagger the start-up process in descending order rather than simultaneous activation for optimal efficiency.
6.11.3. During voltage reduction start-up, ensure the motor is either unloaded or underloaded. Cooling state permits two start attempts, while heating state allows for one.
6.11.4. Upon shutdown of IC416 forced ventilation structure motors, first disconnect the variable frequency motor power. Ten minutes post-shutdown, proceed to disconnect the small motor's power, ensuring proper ventilation cycle completion.
7.Comprehensive Motor Maintenance and Repair
7.1. Regular maintenance, both monthly and annually, is essential for optimal motor performance. This includes minor repairs and thorough overhauls.
7.1.1. Monthly Service/Minor Repair Tasks:
7.1.1.1. Eliminate dust and debris from the motor and assess insulation resistance to ensure reliable operation.
7.1.1.2. Examine motor terminals: Verify bolt/nut security within the junction box, tightening or replacing as necessary for maintained integrity.
7.1.1.3. Inspect all component bolts (nuts) and wires: Ensure grounding bolts (nuts), end covers, and bearing cover bolts are faultless. Confirm grounding wire connections and overall installation status.
7.1.1.4. Evaluate bearings and lubrication system: Check lubricant cleanliness and volume, promptly supplying or replacing as needed to prevent wear.
7.1.1.5. Assess motor fan condition: Confirm secure installation and address any loose, damaged, worn, or distorted bolts (nuts) through replacement.
7.1.2. Annual Maintenance/Overhaul Tasks:
7.1.2.1. Annual maintenance tasks encompass all monthly service/minor repair checkpoints for comprehensive upkeep.
7.1.2.2. Exterior Motor Inspection: Detect and repair any damage, confirm part completeness, and execute thorough dust and debris cleaning.
7.1.2.3. Interior Motor Clean-Up and Inspection: Ensure the motor's interior is free from debris and functioning optimally, addressing any issues found.
(a) Begin by examining the stator windings meticulously for any signs of contamination or damage. Eliminate dust and grime with care, and for any oily residues, first utilize a dry cloth to wipe them clean, subsequently using a cloth slightly moistened with gasoline. Additionally, inspect the winding insulation for any signs of aging or peeling. Should any such issues be detected, ensure timely repair and varnishing to maintain optimal performance. (b) Evaluate the rotor windings for any signs of rupture, contamination, or unwelded joints. (c) Assess the iron cores of both the stator and rotor for any signs of distortion or damage, addressing any discovered issues promptly.
7.1.2.4 Detailed Examination of Windings:
(a) Conduct a thorough assessment to determine if the stator or rotor windings exhibit phase faults, inter-turn short circuits, open circuits, unsoldered joints, or burnout. Implement appropriate repairs based on the findings to ensure continued reliable operation. (b) Utilize a megameter to accurately measure the insulation resistance of each component, ensuring it exceeds the standard threshold of 1MΩ, guaranteeing robust electrical integrity.
7.1.2.5 Bearing Maintenance: (a) Subject the bearing to a gentle back-and-forth motion in a gasoline bath to thoroughly cleanse it. As you rotate the outer section, cleanse in a separate gasoline bath. For installation, consider the heating sleeve method, ensuring the oil temperature never surpasses 100ºC. Maintain even heating to prevent damage. (b) Scrutinize the bearing surfaces, ball bearings, and axle rings for discoloration, such as blue or purple hues, which indicate excessive heating and possible annealing. Replace the bearing if this condition is severe. (c) If feasible, measure the bearing's inner and outer diameters and its width to ensure precision.
7.1.2.6 Post-Repair Run-In: Post-repair, if the motor windings are in satisfactory condition, a 30-minute run-in period is advised to verify insulation resistance and ensure all parts function correctly before proceeding with full load operation.
7.2 Operational Guidelines: Ensure that the bearing temperature while the motor is running remains below 95ºC as monitored by a thermometer. Conduct checks every 2500 hours of operation, and promptly replace lubricant if it has degraded. Clean residual oil from the bearings thoroughly using gasoline. Bearings should be assembled with grease applied directly: For 2P motors, fill the bearing chamber to 1/2 capacity, and for motors 4P and above, fill to 2/3 capacity. Use an oiling cup to add lubricant while in operation, with 2P motors requiring attention every 2000 hours. For motors 4P and above, check every 3000 hours and add 25 to 45 grams as needed, adjusting with seat number increments. Standard bearing grease is lithium-based: L-XBCHA3, with specific types indicated as necessary.
7.3 Motor Disassembly and Assembly: Protect the processing surfaces with 204-1 antirust solution to prevent rust or damage during any disassembly or assembly procedures.
7.4 Rotor Handling: Exercise caution when removing or inserting the rotor to protect the stator windings and insulation from potential damage.
7.5 Winding Replacement: When replacing windings, ensure to update winding data and insulation structures. Failure to do so could degrade performance, rendering the motor unusable.
7.6 Junction Box Maintenance: Inspect the sealing ring of the junction box and replace it promptly if aging is evident.
7.7 Seal Maintenance: Inspect the V-shaft seal ring or framework oil seal on tandem axles. Replace them immediately if signs of aging or wear are present to prevent potential failures.
7.8 When reassembling after disassembly, meticulously cleanse the explosion-proof surfaces to ensure they are free of any debris. Then, apply 204-1 anti-rust grease liberally. It's imperative to confirm there are no gaps on the joint surfaces to maintain optimal safety and performance.
8. Common Issues and Their Resolutions:
8.1 Electrical Issues: Explore Table 3 for a detailed guide on common electrical troubles and their efficient solutions.
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 Mechanical Issues: Refer to Table 4 for a comprehensive look at frequent mechanical breakdowns coupled with practical solutions.
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. Motor Storage and Transportation Guidelines
9.1 Store motors in a dry warehouse with a temperature range of -15°C to +40°C. Ensure the relative humidity does not exceed 90%. The environment should be free of corrosive gases, well-ventilated, and maintain a stable temperature.
9.2 Avoid stacking products too high during storage to ensure proper ventilation and protect the packaging of the underlying products from damage.
9.3 Motors must never be inverted during storage or transportation to prevent damage.
9.4 Protect the axis extension at all times. Never lift or drag the motor using a rope attached to the axle extension, to avoid damage.
9.5 Ensure the protection of the oil cup, bearing temperature-measuring device and its wires, stator winding temperature sensors, and anti-moisture heating device along with its wires to maintain their functionality.

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.