35kV oil-immersed three-phase double-winding on-load regulating power transformer
Rated Capacity: 4,000–31,500 kVA
High Voltage: 35–38.5 kV
Low Voltage: 6.3 / 10.5 kV
Transformer Type: Three-phase oil-immersed double-winding power transformer
Vector Group: Yd11
Voltage Regulation: On-load, table tapping range ±3×2.5%
Product Introduction
Product Overview
Yawei Electric's 35 kV oil-immersed three-phase double-winding on-load voltage regulating power transformer is designed for applications that require voltage regulation during operation. The parameter table lists rated capacities from 4,000 to 31,500 kVA, a 35–38.5 kV high-voltage range, and low-voltage options of 6.3 / 10.5 kV.
The table configuration uses the Yd11 vector group and on-load voltage regulation with a tapping range of ±3×2.5%. Final capacity, voltage, winding, cooling arrangement and applicable standard are confirmed against the project specification and technical agreement.
Technical Specifications
35 kV oil-immersed three-phase double-winding on-load voltage regulating power transformer (4,000–31,500 kVA).
| Rated capacity (kVA) | HV (kV) | Tapping range (%) | LV (kV) | Vector group | No load current (%) | Impedance voltage (%) | No load losses (kW) | On load losses (kW) |
|---|---|---|---|---|---|---|---|---|
| 4000 | 35~38.5 | ±3×2.5 | 6.3 / 10.5 | Yd11 | 0.4 | 7.0 | 2.1 | 26.2 |
| 5000 | 0.4 | 2.6 | 30.8 | |||||
| 6300 | 0.4 | 3.1 | 33 | |||||
| 8000 | 6.3 / 6.6 / 10.5 | YNd11 | 0.32 | 7.5 or 8.0 | 4.3 | 36.5 | ||
| 10000 | 0.32 | 5.1 | 43.2 | |||||
| 12500 | 0.28 | 6 | 51.1 | |||||
| 16000 | 0.28 | 7.2 | 63.3 | |||||
| 20000 | 0.28 | 8.5 | 74.4 | |||||
| 25000 | 0.24 | 10.0 | 10.1 | 88 | ||||
| 31500 | 0.24 | 12 | 104.4 |
Application
Customization Service
Certifications
Packing and Delivery
Testing and Quality Assurance
Each transformer undergoes factory testing before delivery according to the agreed specification, including:
- Routine tests (ratio, resistance, losses)
- Type tests (temperature rise, impulse test)
- Special tests (upon request)
Applicable standards and required tests are confirmed according to the project specification and final technical agreement.
Installation and Maintenance
The transformer is designed for easy installation and low maintenance:
- Suitable for outdoor or indoor installation
- Minimal maintenance due to sealed oil system
- Periodic inspection recommended for long-term performance
Tell us the required capacity, primary and secondary voltages, phase, frequency, installation environment, applicable standard, and delivery destination. Our sales and engineering teams will review your requirements and respond within one business day.
Contact Us
Tel. / WhatsApp: +86-19940712559
Email: enquiry@Yaweielectric.com
Office Address: Building 24, No. 86 Hezuo Road, Pidu District, Chengdu City, Sichuan Province, China.
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