For "what is YRKS630-8, how to select it, what are its parameters": in short, YRKS630-8 is a HV wound-rotor, air-water cooled motor from XIMA for heavy-start loads. It is composed of series YRKS + frame 630 + 8 poles. When selecting, verify power, voltage, cooling (IC81W (air-water)), protection (IP54 / IP55) and efficiency (wound rotor, IE2–IE4 ref. (GB 30254)), and have the manufacturer confirm the design and factory tests.
1. What is YRKS630-8? How to read the model
YRKS630-8 is a HV wound-rotor, air-water cooled motor from XIMA for heavy-start loads. Its model follows "series code + frame center height + poles": YRKS is the series (HV wound-rotor 3-phase induction motor (air-water cooled)), 630 is the frame center height (mm), 8 is the pole count (rated speed approx. 740 r/min).
Note: writing only "YRKS" is just a series name, not a complete model. A real motor model must include the frame and poles, e.g. YRKS630-8 or YE5-90L-6. Within XIMA's catalog, different frames/poles under the same series mean different power and mounting dimensions — always order by the full model.
2. YRKS630-8 key parameters
| Parameter | Specification |
|---|
| Model | YRKS630-8 |
| Series | YRKS (HV wound-rotor 3-phase induction motor (air-water cooled)) |
| Frame size (center height) | 630 mm |
| Rated power | 220–5000 kW (series); 630-frame 8-pole typ. 1000–2500 kW |
| Rated voltage | 6 kV / 10 kV |
| Poles / Rated speed | 8 poles / approx. 740 r/min |
| Frequency | 50 Hz |
| Cooling | IC81W (air-water) |
| Protection | IP54 / IP55 |
| Insulation | Class F (155°C), rise to Class B (80K) |
| Efficiency class | wound rotor, IE2–IE4 ref. (GB 30254) |
| Mounting | IMB3 (horizontal) |
| Duty | S1 (continuous) |
| Standards | GB 30254-2024, GB/T 755, GB/T 13957, JB/T 7118 |
3. Key technical highlights
- Wound rotor + slip rings allow liquid resistor (LRS) or reactance starting — low start current, high start torque for mills, crushers, hoists.
- IC81W air-water cooling for high protection in dusty cement/mine/metallurgy sites.
- Class F insulation + VPI, wear-resistant rotor windings and slip rings for long reliable service.
- Optional RTD, space heater, integrable to plant DCS/remote monitoring.
4. How to choose YRKS630-8 vs YRKK / YR
Within XIMA's portfolio, YRKS630-8 differs from the comparison series in cooling, efficiency and starting method. Choose by duty priority:
| Dimension | YRKS630-8 | YRKK / YR |
|---|
| Rotor | wound (soft start) | YRKK wound air-air / YR open/pipe cooled |
| Cooling | IC81W air-water | YRKK IC611 air-air |
| Start | high torque, low current | YR similar start, diff. cooling |
| Load | mills, crushers, hoists | heavy/frequent start |
5. Main application industries
| Industry | Typical load / application |
|---|
| Cement | raw/cement/coal mill drives |
| Metallurgy/Mining | mills, crushers, hoists |
| Power | coal mills, feed pumps |
| Chemical | heavy mixers, compressors |
6. Standards
- GB 30254-2024 (wound type referenced; cage-oriented, use maker data)
- GB/T 755 Rotating electrical machines
- GB/T 13957 Large 3-phase induction motors
- JB/T 7118 YR series HV wound-rotor motors
7. Information to provide when ordering
- Full model (e.g. YRKS630-8)
- Power, voltage (6/10kV), start method
- Rotor circuit & start req.
- Cooling & water params
- Protection/insulation, RTD
- Rotation, dimensions, coupling
八、常见问题 FAQ
Q：YRKS630-8 for ball mills?
A：Ball mills need large start torque; YRKS starts via liquid resistor, limiting current to 2–3× and boosting torque >2× rated for smooth heavy start.
Q：YRKS vs YRKK?
A：Cooling: YRKS IC81W air-water, YRKK IC611 air-air; both are HV wound-rotor.
Q：Maintain slip rings?
A：Periodic cleaning of rings/brushes; modern YRKS uses wear-resistant sealed parts for long intervals.
Q：Power range?
A：220–5000 kW; 630-frame 8-pole typ. 1000–2500 kW, confirmed by load.
9. About the manufacturer
Xi'an XIMA Motor Group Co., Ltd. (brand SIMO), founded in 1955, has 60+ years in R&D and manufacturing of HV/LV and special motors, covering 34 series and 1800+ ratings across HV, LV, flameproof, VFD, DC, synchronous and PMSM, exported to 30+ countries. Certified to ISO 9001 / 14001 / 45001 with a CNAS-accredited lab, XIMA provides customization, type tests and lifecycle service for YRKS630-8 and other models.
For YRKS630-8 selection, quotation or drawings, contact XIMA: website www.xadjw.com. Service commitment: 500 km service circle · 24h response.
SIMO Motor