The YBBP series flameproof variable frequency three-phase asynchronous motor is a newly developed product based on the YB3 series motors, incorporating the latest domestic and international technologies in electromagnetic design, manufacturing processes, and materials. This series is designed to operate in conjunction with a variable frequency drive (VFD), enabling smooth and stepless speed regulation over a wide range.

Within a frequency range of 5–50 Hz, the motor operates under constant torque VFD control, while 50–100 Hz operation provides constant power speed regulation. Each motor is equipped with an independent axial-flow cooling fan, ensuring effective cooling at all speeds and guaranteeing safe and reliable operation under varying conditions.

The power ratings and installation dimensions of the YBBP series comply with International Electrotechnical Commission (IEC) standards, with corresponding dimensions aligned with DIN 4267. This standardization facilitates compatibility with export equipment and simplifies spare parts replacement for imported machinery.

The flameproof performance of the YBBP series complies with GB 3836.1-2010 “Explosive Atmospheres – Part 1: Equipment – General Requirements” and GB 3836.2-2010 “Explosive Atmospheres – Part 2: Equipment Protection by Flameproof Enclosure ‘d’”. It also meets the requirements of IEC 79-1, BS 4683, and EN 50018. The explosion-proof markings include Ex d I Mb, Ex d IIA T4 Gb, Ex d IIB T4 Gb, and Ex d IIC T4 Gb, making the motors suitable for various hazardous explosive environments.

Explosion-Proof Classification Explanation

• Ex d I Mb: Suitable for equipment installed in methane explosive atmospheres in coal mines. This classification provides a high level of protection, ensuring that the equipment does not become an ignition source during normal operation or under expected fault conditions, including sudden gas presence or power interruption. It is suitable for non-mining face electrical equipment.

• Ex d IIA T4 Gb / Ex d IIB T4 Gb: Suitable for explosive gas environments outside coal mines, such as petroleum and chemical industries. These classifications also offer a high level of protection and ensure that the equipment is not an ignition source during normal operation or under foreseeable fault conditions.

• Ex d IIC T4 Gb: Suitable for hazardous areas within factories where explosive gas mixtures such as hydrogen or acetylene may be present.

When combined with a VFD, the YBBP series forms an advanced speed control system. Compared with traditional speed regulation methods, it offers significant energy-saving benefits, excellent speed regulation performance, and a wide speed range. The motors feature low noise and low vibration, and are compatible with both domestic and international VFD brands, supporting energy savings and automated control.

The YBBP series flameproof variable frequency three-phase asynchronous motor is specifically designed for operation in environments containing explosive gases. It ensures safe and reliable performance while providing precise variable speed control, making it ideal for applications requiring adjustable speed in hazardous locations. These motors are widely used in petroleum and chemical industries, coal mines, grain storage facilities, and other flammable or explosive environments.

Main Features

• Flameproof design: Prevents internal explosions from igniting external explosive atmospheres, ensuring safe operation in hazardous areas.

• Variable frequency speed control: Allows flexible speed adjustment according to operating requirements, improving efficiency and reducing starting impact, thereby extending motor service life.

• High efficiency and energy saving: Reduces energy consumption while maintaining high operational efficiency, supporting sustainable and environmentally responsible operations.

• Wide adaptability: Suitable for various hazardous environments and operating conditions, with strong environmental adaptability.

• High reliability and durability: Manufactured under strict standards using high-quality materials and advanced processes to ensure long-term stable operation.

Application Areas

• Petroleum and chemical industries, especially in zones with explosive gases

• Coal mining, particularly underground and other high-risk environments

• Grain storage facilities, where combustible dust may cause explosions

• Other flammable and explosive locations, such as paint manufacturing and pharmaceutical plants

In summary, the YBBP series flameproof variable frequency three-phase asynchronous motor combines explosion-proof safety, high efficiency, energy saving, and long-term reliability. Its variable frequency speed control capability enhances precision and flexibility in industrial processes, playing a vital role in improving productivity, reducing operating costs, and ensuring safe operation in complex and hazardous environments.