YR Series Wound-Rotor Three-Phase Asynchronous Medium-Sized High-Voltage Motors: Key Specifications and Advantages

1. Core Product Parameters of YR Series Medium High-Voltage Wound-Rotor Three-Phase Asynchronous Motor

1. Rated Voltage: 3kV, 6kV, 10kV, 50Hz power frequency
2. Power Range: 220kW ~ 2500kW
3. Frame Center Height: 355mm ~ 630mm (standard medium high-voltage frame)
4. Sub-models, Cooling & Protection
   
5. Insulation Class: Class F insulation, temperature rise evaluated per Class B standard, windings treated by VPI vacuum impregnation
6. Duty Cycle: S1 continuous duty, 24-hour non-stop full-load operation
7. Rotor Structure: Wound rotor with external slip ring & brush assembly, brush lifting device optional
8. Bearing Type: Rolling bearings for small & medium power; sliding bearings for high-power models
9. Operating Conditions: Altitude ≤1000m, ambient temperature -15℃ ~ 40℃, relative humidity ≤90%

2. Core Product Advantages

1. Excellent Heavy-Load Starting Performance
   External resistors or frequency-sensitive rheostats can be connected to rotor circuit, delivering high starting torque with low inrush current and avoiding grid impact; ideal for sites with limited transformer capacity and heavy start-up loads.
2. Simple Speed Regulation Function
   Smooth low-speed speed control by adjusting external rotor resistance, no high-power frequency converter required to cut overall investment cost.
3. Multi-structure for All Working Conditions
   Three cooling versions (open YR, air-air cooled YRKK, air-water cooled YRKS) available to match indoor, outdoor, dusty, humid, water-shortage or water-sufficient factory environments.
4. Long Service Life & Superior Insulation
   Stator and rotor windings adopt VPI vacuum pressure impregnation, featuring moisture-proof, dust-resistant and anti-partial discharge performance. Enclosed YRKK/YRKS with independent internal air circulation block corrosive gas to prevent dust accumulation on windings.
5. Stable Operation & Easy Maintenance
   High-precision rotor dynamic balance ensures low vibration and noise. External access panels for slip ring and brush inspection; brush replacement and slip ring maintenance without complete motor disassembly. Welded steel box frame provides high rigidity and light weight.
6. Perfect for Heavy Industrial Machinery
   Custom-designed for high inertia equipment including ball mills, rolling mills, mine winches, crushers, heavy belt conveyors and large industrial fans, with mature design and low failure rate.