For "what is YKS500-4, how to select it, what are its parameters": in short, YKS500-4 is a HV squirrel-cage, air-water cooled 3-phase induction motor from XIMA. It is composed of series YKS + frame 500 + 4 poles. When selecting, verify power, voltage, cooling (IC81W (air-water)), protection (IP54 / IP55) and efficiency (per GB 30254-2024, IE2–IE4), and have the manufacturer confirm the design and factory tests.
1. What is YKS500-4? How to read the model
YKS500-4 is a HV squirrel-cage, air-water cooled 3-phase induction motor from XIMA. Its model follows "series code + frame center height + poles": YKS is the series (HV squirrel-cage 3-phase induction motor (air-water cooled)), 500 is the frame center height (mm), 4 is the pole count (rated speed approx. 1485 r/min).
Note: writing only "YKS" is just a series name, not a complete model. A real motor model must include the frame and poles, e.g. YKS500-4 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. YKS500-4 key parameters
| Parameter | Specification |
|---|
| Model | YKS500-4 |
| Series | YKS (HV squirrel-cage 3-phase induction motor (air-water cooled)) |
| Frame size (center height) | 500 mm |
| Rated power | 220–5000 kW (series); 500-frame 4-pole typ. 900–1800 kW |
| Rated voltage | 6 kV / 10 kV |
| Poles / Rated speed | 4 poles / approx. 1485 r/min |
| Frequency | 50 Hz |
| Cooling | IC81W (air-water) |
| Protection | IP54 / IP55 |
| Insulation | Class F (155°C), temp. rise evaluated to Class B (80K) |
| Efficiency class | per GB 30254-2024, IE2–IE4 |
| Mounting | IMB3 (horizontal) |
| Duty | S1 (continuous) |
| Standards | GB 30254-2024, GB/T 755, GB/T 13957, JB/T 7593 |
3. Key technical highlights
- Air-water cooling (IC81W): internal closed air loop transfers heat to cooling water via an air-water cooler — ideal where cooling water is available and dust is high; protection up to IP54/IP55.
- Frame H355–H1000, VPI impregnation and Class F insulation for high electrical/mechanical strength and moisture/dust resistance.
- Optional bearing/winding RTD (PT100), space heater and anti-condensation for remote monitoring and long shutdown protection.
- Rugged low-maintenance squirrel cage for long continuous duty (pumps, fans, mills).
4. How to choose YKS500-4 vs YKK / YXKS
Within XIMA's portfolio, YKS500-4 differs from the comparison series in cooling, efficiency and starting method. Choose by duty priority:
| Dimension | YKS500-4 | YKK / YXKS |
|---|
| Cooling | IC81W air-water | YKK IC611 air-air / YXKS IC81W high-eff. |
| Efficiency | standard high (IE2–IE4) | YXKS is optimized high-eff. |
| Environment | good water, high protection | YKK for well-ventilated plants |
| Power | 220–5000 kW | similar across frames |
5. Main application industries
| Industry | Typical load / application |
|---|
| Power | ID/fd fans, circ. pumps, coal mills |
| Metallurgy | dust fans, cooling pumps |
| Cement | kiln/preheater fans |
| Water | large pumping stations |
6. Standards
- GB 30254-2024 Efficiency grades for HV cage motors (IE2 grade-3 entry, IE4 grade-1)
- GB/T 755 Rotating electrical machines
- GB/T 13957 Large 3-phase induction motors
- JB/T 7593 Y-series HV motors
7. Information to provide when ordering
- Full model (series+frame+poles, e.g. YKS500-4)
- Rated power & voltage (6/10kV)
- Cooling & water params (temp, flow, pressure)
- Mounting (IMB3) & rotation
- Protection/insulation, RTD & heater
- Standard or special spec
八、常见问题 FAQ
Q：YKS500-4 : what do 500 and 4 mean?
A：500 is frame center height 500 mm; 4 means 4 poles, rated speed ~1485 r/min; together with YKS they form the full model.
Q：YKS vs YKK?
A：YKS uses air-water cooling (IC81W) with higher protection; YKK uses air-air cooling (IC611), suited to well-ventilated plants.
Q：Efficiency grade of YKS?
A：Per GB 30254-2024, IE2 (grade-3) to IE4 (grade-1) depending on design.
Q：Water quality requirement?
A：Cooling water should meet circulating-water quality (hardness, pH, suspended solids); add water-air cooler and loss-of-water protection.
Q：Why full model when ordering?
A：Different frame/poles mean different power and dimensions; only the full model identifies the product uniquely.
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 YKS500-4 and other models.
For YKS500-4 selection, quotation or drawings, contact XIMA: website www.xadjw.com. Service commitment: 500 km service circle · 24h response.
SIMO Motor