| A | What types of transformers do you manufacture? |
Q
| We manufacture a wide range of transformers including oil-immersed power transformers, dry-type transformers, distribution transformers, amorphous alloy transformers, and special-purpose transformers. Voltage levels typically range from 10kV to 110kV, with capacities from 30kVA to 100,000kVA. Custom specifications are available upon request. |
| Q | What standards do your transformers comply with? |
| A | Our transformers are designed and manufactured in compliance with IEC 60076, GB/T 1094 and other relevant international standards. We can also produce according to ANSI/IEEE, DIN, BS and other regional standards based on your target market requirements. |
| Q | Can you provide transformers for renewable energy projects? |
| A | Yes. We manufacture dedicated transformers for renewable energy applications including photovoltaic (PV) boost transformers, wind power transformers, box-type transformer stations and energy storage transformers. These are specifically engineered to handle the fluctuating load characteristics of renewable generation. |
| Q | Can you provide transformers with specific vector groups and impedance? |
| A | Yes. We can manufacture transformers with various vector groups (such as Dyn11, Yyn0, Yd11, YNd11) and custom impedance values to match your grid requirements. Please specify these parameters in your inquiry so we can configure the unit accordingly. |
| Q | What cooling methods are available for your transformers? |
| A | For oil-immersed transformers, we offer ONAN (oil natural air natural), ONAF (oil natural air forced) and OFAF (oil forced air forced) cooling methods. For dry-type transformers, AN (air natural) and AF (air forced) cooling are available. The appropriate cooling method is selected based on capacity and application environment. |
| Q | Can you provide transformers with special insulation levels or altitude ratings? |
| A | Yes. We can manufacture transformers with enhanced insulation levels for lightning-prone areas, and derated designs for high-altitude installations above 1000m where cooling and insulation performance are affected. Please specify your site conditions. |
| Q | What protection accessories can be fitted to your transformers? |
| A | Our transformers can be equipped with a full range of protection and monitoring accessories including Buchholz relays, pressure relief devices, oil temperature indicators, winding temperature indicators, conservator tanks, silica gel breathers, magnetic oil level gauges and tap changers. We configure these based on your project specifications. |
| Q | What tests do your transformers undergo? |
| A | Every transformer undergoes routine tests including winding resistance measurement, voltage ratio measurement, no-load loss and current measurement, load loss and impedance voltage measurement, dielectric tests (power frequency withstand and lightning impulse), and oil quality tests. We provide a complete test report with each shipment. |
| Q | How are transformers packaged and shipped? |
| A | Transformers are securely packaged to withstand long-distance sea freight. Small and medium units are protected with shock-proof packaging on wooden pallets or in wooden crates. Large power transformers are shipped in parts with core, windings, tank and accessories separately packed, with full assembly and commissioning guidance provided. All wooden packaging meets ISPM 15 standards. |
| Q | Does Yaogu have experience with international projects? |
| A | Yes. Established in 2004, Yaogu has more than 20 years of experience in electrical products and international trade, serving customers across global markets. Our team supports product selection, specification confirmation, custom production, quality inspection, export packaging, shipping coordination, technical documentation, and after-sales service. |
BK Series Control Transformer Complete Parameters.xlsx
