Yfb4/Yfb3 Low Voltage Dust Explosion-Proof Three-Phase Induction Motor with Atex Certification

• Customization: Available
• Application: Industrial, Universal, Dust Explosion Proof
• Operating Speed: Constant Speed
• Model NO.: YFB4/YFB3
• Number of Stator: Three-Phase
• Species: Explosion-Proof Three-Phase
• Rotor Structure: Squirrel-Cage
• Casing Protection: Closed Type
• Number of Poles: 2-30p
• Starting Mode: Direct on-line Starting
• Certification: ISO9001, CCC
• Brand: Changli
• Voltage: 380V/400V
• Current: 3.2A
• Mounting: Imb3
• Rated Power: 0.12~630kw
• Rated Frequency: 50Hz/60Hz
• Frame Size: H63mm-400mm
• Insulation Grade: F
• Protection: IP55
• Transport Package: Seaworthy Package
• Trademark: CHANGLI
• Origin: China
• HS Code: 8501510090
• Production Capacity: 550000

Product Description

Factory View 

Product Description 
Low voltage high-efficiency IE4 three-phase asynchronous motor (explosion-proof YBX4 non explosion-proof YE4) adopts GB755 / IEC60034, explosion-proof GB3836 / IEC 60079 and other domestic and foreign standards. The power grade and installation size comply with the International Electrotechnical Commission (IEC) standards, the corresponding relationship is the same as the German DIN42673 standard, and the efficiency complies with class 2 in the national standard GB18613-2020. 

Technical Characteristics

Frame Size: H80~355 Rated voltage: 220V~1140V Poles: 2~8P Protection Degree: IP55, IP56, IP65, IP66 Mounting: IMB3, IMB35, IMB5, IMV1 etc.

Power Range: 0.18kW~315kW Frequency: 50Hz, 60Hz Explosion proof sign: Ex d B T4 Gb,Ex d IIC T4 Gb or None Cooling Methods: IC411

Product features
The products have excellent manufacturing, excellent performance and reliable operation, and are at the leading level in China.

Application industry
Petroleum, Metallurgy, Chemical Industry, Electric Power, Machinery

Operating conditions
The motor is suitable for places with explosive gases in petrochemical, petroleum, mining, chemical, metallurgy, electric power and other industries.
It is mainly used to drive general machinery such as fan, water pump, compressor, feed pump, crusher, winch, centrifuge, cutting machine tool, transportation machinery and so on. 

Raw Materials
Frame: Cast iron, steel
Stator: Copper
Rotor: Copper/aluminum 
Shaft: ASTM1045 Steel
Bearing: SKF or equivalent Chinese brands

Frame 
Winding 


In-process Inspection/ Quality Control
All the measuring apparatus and instruments are calibrated each year.
Quality inspection and control for each item

Name	Inspection item
Coil	1. Physical and chemical tests for raw materials
	2. Coil winding process inspection
	3. Winding dimension inspection
Iron Core	1. Physical and chemical test report for silicon steel sheet material
	2. Lamination burrs and paint film inspection
	3. Dimensional inspection of laminated steel sheet
Frame	1.Cold welding parts conformity certificate
	2. Finish machining inspection
Rotor	1. Rotor core lamination inspection
	2. Conducting bar welding
	3. Check the material, appearance, conductivity and size of the conducting bar end ring
	4. Check the fastening of the conducting bars in the slots
	5. Dimensional check, including iron core outer diameter
	6. Dynamic balance correction
Shaft	1. Raw material , annealing check
	2 Finish machining check
Stator	1. Iron core compactness check
	2. Check iron core length and section length
	3 Inserting winding check
	4. Iron consumption check
Assembly	Plain bearing size and surface quality check
	2. Check the size of the air gap, the coincidence of the axial centerline of the stator and rotor core, the gap of inner fan and windshield
	3 Cleaning check inside the motor
	4 Shaft center height and installation size check
Test	1. Routine test
	2. Type test

Test Items
Each motor must be tested before leaving the factory. Only all the items are qualified, can the motor be delivered. Each motor will have a test report.

Routine test items Winding three-phase DC resistance Winding insulation resistance to ground Winding withstand voltage test No-load current No-load power No-load loss Three-phase no-load current imbalance Locked rotor current Locked rotor torque Maximum torque Rotation direction Vibration: horizontal, vertical, axial  Noise

Type test items Full load input power Full load current Stator winding loss Rotor winding loss Iron loss Mechanical loss Other losses Full-load slip ratio Stator winding temperature rise Bearing temperature Thermal winding insulation resistance Overload test Full-load power factor Efficiency

Paintings
Standard painting thickness: 120microns (40 micron priming paint + 80micron finish paint)
With professional certified painters, we can mix and paint any color according to your requirements.

Packaging
Standard seaworthy package for export
Plywood package or wooden fumigation package
Suitable for long distance transportation by sea

Warranty Period
Standard warranty: 12 months after commissioning, or 18 months after delivery, whichever comes first.
If you would like to extend the warranty period, please contact us for details.