Energy-saving core
Low-loss construction reduces operating energy use and long-run ownership cost.
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POWER TRANSFORMER
35kV Power Transformer
High-voltage oil-immersed equipment for utility, railway, mining, industrial and renewable-energy power systems.
1000–10000 kVA35 kV primaryONAN / ONAF50 Hz standard
PRODUCT OVERVIEW
High-voltage conversion selected around the project duty
The supplied 35kV record covers 1000–10000 kVA oil-immersed power transformers with ONAN and ONAF dual cooling. The compact layout, dependable insulation and flexible voltage regulation support long-term utility and infrastructure operation.
Capacity, secondary voltage, vector group, cooling, high-altitude adaptation and certification are confirmed per project. The Kazakhstan case documents eight 35kV transformers for railway infrastructure in a harsh climate.
CORE FEATURES
Stable output for demanding grid and infrastructure environments
ONAN / ONAF cooling
Natural or fan-assisted oil cooling adapts output to load variation.
Reliable insulation
High-grade insulation supports power-frequency, induced and impulse withstand requirements.
Voltage regulation
Tap-change options support stable output when grid voltage fluctuates.
Comprehensive protection
Protection assemblies support rapid fault response and safe, stable operation.
Harsh-climate route
Project engineering can address low temperature, wind-sand and anti-condensation requirements.
TECHNICAL PARAMETERS
Principal project-selection inputs
The final data sheet is issued after the duty, standards and site conditions are confirmed.
| Parameter | Supplied range / option |
|---|---|
| Rated power | 1000, 2000, 3150, 4000, 5000, 6300, 8000 or 10000 kVA |
| Primary voltage | 35 kV ±2 × 2.5% or ±3 × 2.5% |
| Secondary voltage | 6.3, 10.5, 11 or 20 kV |
| Cooling | ONAN / ONAF dual cooling |
| Frequency | 50 Hz; 60 Hz available on request |
| Vector group | Dyn11 or YNd11; standard Dyn11 |
| Winding material | High-purity oxygen-free copper |
| Efficiency | ≥98.0%–99.7%, increasing with rated power |
| Standards | IEC 60076, GB/T 1094 and agreed project requirements |
APPLICATIONS
Designed for large-scale power conversion.
Use the 35kV route where project-specific engineering, high capacity and dependable service support are required.
Utility substationsMedium- and high-voltage grid conversion and transmission.
Railway infrastructureHigh-capacity supply for traction and railway power systems.
Mining and industryStable conversion for heavy industrial and metallurgical loads.
Renewable stationsProject-specific interfaces for new-energy generation and grid connection.
PROJECT PROOF
Engineering support follows the site conditions.
FAQ
Questions to settle before a 35kV order
Which cooling mode should be selected?
ONAN / ONAF selection follows the load profile, ambient conditions and required full-load output.
Can the secondary voltage and vector group be customized?
Yes. The supplied record lists several secondary voltages and Dyn11 or YNd11 vector groups for project review.
What tests and documents are available?
Routine and type-test records, ratio, resistance, no-load, load and withstand test documentation are prepared for the approved configuration.
What is the typical lead time?
The supplied record describes approximately 30–45 days after deposit and full technical confirmation, subject to quantity and configuration.
PRODUCT ENQUIRY
Confirm a 35kV project route.
Share duty, climate, standards, capacity, ratio and delivery requirements.
35KV POWER TRANSFORMER
Request technical details.
Use the inquiry form for engineering review and a project-specific quotation.