YFB4 Series High-Efficiency Low-Voltage Dust-Explosion-Proof Three-Phase Asynchronous Motor

1. Product Description

The YFB4 Series Motor is a fully enclosed, self-fan-cooled, squirrel-cage, dust-explosion-proof three-phase asynchronous motor independently developed and launched by our company. Its efficiency index complies with Level 2 Energy Efficiency specified in IEC60034-30 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Levels for Motors. Its explosion-proof performance meets the 2021 version of relevant standards. It features excellent performance, safe and reliable operation, and lower vibration, noise, and temperature rise compared with similar products, fully complying with environmental protection requirements.

2. Product Application

Dust-explosion-proof motors are mainly suitable for places with combustible dust, such as coal, petroleum, grain and oil processing, chemical industry, textiles, metallurgy, and building materials industries. They are ideal power equipment for such scenarios.

3. Executive Standards

The YFB4 high-efficiency flameproof three-phase asynchronous motor complies with the following main relevant standards:

GB/T 755-2019 Rotating Electrical Machines - Ratings and Performance

GB 18613-2020 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Levels for Motors

GB/T 1032-2012 Test Methods for Three-Phase Asynchronous Motors

GB/T 1993 Cooling Methods for Rotating Electrical Machines

GB/T 3836.1-2021 Explosive Atmospheres - Part 1: Equipment - General Requirements

GB/T 3836.12-2021 Explosive Atmospheres - Part 12: Characteristics of Combustible Dusts - Test Methods

GB/T 3836.31-2021 Explosive Atmospheres - Part 31: Equipment Protected by Dust-Ignition-Proof Enclosures "t"

GB/T 4942.1 Degrees of Protection Provided by the Integral Design of Rotating Electrical Machines (IP Code) - Classification

GB/T 10068 Mechanical Vibration of Electric Motors with Shaft Heights 56 mm and Above - Measurement, Evaluation and Limits of Vibration

GB/T 10069.1 Methods for Determination of Noise and Noise Limits of Rotating Electrical Machines - Part 1: Methods for Determination of Noise of Rotating Electrical Machines

GB/T 10069.3 Methods for Determination of Noise and Noise Limits of Rotating Electrical Machines - Part 3: Noise Limits

4. Basic Features

Frame Size: 63~355

Rated Power Range: 0.12kW~315kW

Number of Poles: 2~16 poles

Rated Voltage: 220V, 220/380V, 380V, 660V, 380/660V, 400V, 690V, 400/690V, 720V, 750V (Customized voltage available upon request)

Rated Frequency: 50Hz or 60Hz

Insulation Class: Class 155 (F)

Efficiency: Level 2 per GB18613-2020

Cooling Method: IC411

Mounting Type: IMB3, IMB5, IMB35, IMV1 (Other mounting types available upon request)

Protection Class: IP65

Duty Type: S1

Explosion-Proof Marking: Ex tb IIIC T130℃ Db

Installation Environment: Indoor (standard configuration). Optional configurations: Outdoor (W), Outdoor moderate corrosion resistance (WF1), Outdoor strong corrosion resistance (WF2), Indoor moderate corrosion resistance (F1), Indoor strong corrosion resistance (F2), Humid tropical (TH), Dry tropical (TA), Outdoor humid tropical (THW), Outdoor dry tropical (TAW)

Environmental Conditions: Ambient air temperature: -20~+40℃; Altitude: Not exceeding 1000m (Special ambient air temperature and altitude require mutual agreement between both parties and must be specified when placing an order)

Mounting Configurations: 5 basic structural types, with 15 derived common structural and mounting types:

B3: Frame with feet, end cover without flange

B5: Frame without feet, end cover with flange

B35: Frame with feet, end cover with flange

B14: Frame without feet, end cover with small flange

B34: Frame with feet, end cover with small flange

5. Ordering Guide

The following factors should be considered when selecting the motor:

□ Explosion-proof class: Ex tb IIIC T130℃ Db

□ Voltage: 380V, 660V, etc.

□ Frequency: 50Hz, 60Hz, etc.

□ Mounting type: IMB3, IMB35, etc.

□ Operating environment: Indoor/outdoor, ambient temperature, altitude, etc.

□ Protection class: IP65/IP66

□ Mechanical characteristics and moment of inertia of the driven equipment

□ Connection method between the motor and the driven equipment

□ Starting method, starting frequency, and starting voltage drop

□ Duty type: S1 or others

□ Thermal classification: Class 155 (F) or others

□ Motor rotation direction: Clockwise, counterclockwise, bidirectional

□ Terminal box position: Top-left, top-right

□ Inlet type of terminal box: Rubber-sheathed cable

□ Ambient temperature, altitude, etc.

Example of Requirements: For a motor with frame center height 355, 220kW, 2 poles, frame with feet, end cover without flange, used in factories for IIIC category T135℃ group dust explosion protection, 380/660V, IP55, clockwise rotation, and explosion-proof gland inlet, the marking is as follows:

YFB4-355M1-2 220kW 380/660V 50Hz IMB3 Ex tb IIIC T130℃ Db IP65 Explosion-Proof Gland

For special requirements (e.g., voltage, frequency, protection class, rotation direction, mounting type, double shaft extension, noise, vibration limits, explosion-proof marking, terminal box inlet method, etc.), manufacturing can only be carried out after signing a technical agreement.