Power Range: The YBK3 Series covers a power range from 5.5 kW to 500 kW across 18 frame sizes, providing flexible and convenient selection for various underground mining equipment. Available in 2, 4, 6, and 8-pole speed configurations to meet diverse load characteristic requirements, ensuring wide application compatibility.
Rated Voltage: Designed for direct connection to standard three-phase AC power supplies in underground mining environments at 380V, 660V, or 1140V, 50Hz, requiring no additional configuration. Their strong voltage adaptability ensures stable operation under different grid conditions.
Efficiency Class: This series meets the Grade 2 efficiency requirements of the GB18613-2020 standard, achieving an efficiency improvement of 3-5 percentage points over standard motors for significant energy savings. High-frequency, low-loss silicon steel and optimized winding design effectively suppress harmonic losses, maintaining excellent efficiency across a wide load range.
Power Factor: Featuring an optimized electromagnetic design, the motors deliver a high power factor of 0.86-0.89 at 50Hz. This minimizes reactive power losses, improves grid power quality, reduces line losses, and enhances overall system operating efficiency.
Protection Level: With an IP55 protection rating, the motors are effectively sealed against dust ingress and water jets, making them suitable for the damp, dusty, and harsh conditions of underground mines. The Totally Enclosed Fan-Cooled (TEFC) construction ensures superior heat dissipation for reliable, long-term operation.
Frame Construction: The frame, constructed from welded high-strength steel plates or high-strength cast iron, ensures robust durability and excellent heat dissipation. It is designed to withstand significant mechanical stress for reliable, long-term operation. Featuring an anti-corrosion surface treatment and an IP55 protection rating, it maintains a clean appearance, extended service life, and reliable performance in harsh underground mining environments.
Cooling Method: Utilizes a self-ventilated (IC411) cooling system with a high-efficiency internal fan, ensuring stable airflow and effective heat dissipation at all motor speeds. The optimized cooling circuit design provides high thermal efficiency, maintaining stable temperature rise across a wide operating range and preventing performance degradation due to insufficient cooling.
Insulation Class: Incorporates a Class H insulation system, rated for Class F temperature rise. This provides a substantial thermal margin for extended insulation life and high reliability under elevated operating temperatures. The stator is processed using Vacuum Pressure Impregnation (VPI), ensuring stable insulation properties, strong resistance to voltage surges, and safe long-term operation.
Mounting Options: Available in various configurations including IMB3, IMB5, and IMB35 arrangements to accommodate horizontal, vertical, and other mounting requirements. The frame feet are designed with standardized mounting holes, enabling quick and secure connection to equipment and reducing installation time.
Bearing System: Equipped with reinforced deep groove ball bearings. Insulation protection is provided as standard to effectively prevent bearing current damage and significantly extend bearing service life. Designed for long-life lubrication, the system features extended maintenance intervals, reducing upkeep costs and ensuring suitability for demanding underground mining conditions.
Starting Torque: Offers a high starting torque ratio of 200%-240% of the rated torque, providing reliable starting performance for heavy-duty and frequent start-stop applications. It ensures smooth acceleration with minimal impact on the power supply and connected equipment.
Breakdown Torque: With a breakdown torque ratio of 280%-320% of rated torque, the motor delivers robust overload capacity. It can withstand short-term overloads and maintain stable operation under demanding conditions, ensuring high reliability.
Noise Level: The optimized airflow design and low-noise fan enable quiet operation, complying with the GB10069 standard. The sound pressure level at a 1-meter distance is typically ≤85 dB(A), making it suitable for use in noise-sensitive environments.
Vibration Grade: The rotor is dynamically balanced to meet the GB 10068 standard requirements, ensuring smooth operation and minimizing transmitted vibration. With a vibration velocity of ≤2.8 mm/s, it supports the long-term stable operation of connected machinery.
Duty Cycle: Rated for S1 continuous duty, the motor is designed for reliable, long-term operation with stable temperature rise. The optimized thermal management reduces temperature rise by approximately 10K compared to conventional designs, ensuring effective heat dissipation.
Operating Temperature: Designed for reliable operation in ambient temperatures from -20°C to +40°C. With ample thermal design margin, it offers strong adaptability for stable performance across various climatic conditions. An optimized cooling system ensures consistent operation in high-temperature environments.
Altitude: Suitable for direct use at altitudes up to 2,000 meters. For installations above this level, derating is required per relevant standards. Customized solutions are available, including anti-corrosion, moisture-proof, and enhanced explosion-proof treatments for specific environments.
Safety Certifications: The product carries the Mining Products Safety (MA) Certificate, the Explosion-Proof Certificate, and the China Compulsory Certification (CCC), ensuring compliance with national electrical safety standards for reliable and safe operation in mining applications. Its energy-saving performance is validated by the China Energy Label certification.
Warranty: The complete motor is covered by a 12-month warranty, which can be extended under special operating conditions upon agreement. We provide comprehensive technical support and after-sales service to protect customer interests, including free repair services during the warranty period.
Standards Compliance: The product conforms to Chinese National Standards including GB3836.1-2, GB18613-2020, and MT/T 477, with performance metrics meeting advanced international levels. It also complies with the IEC 60034 series of international standards, fulfilling requirements for global exports.
