Dry-type transformer 35 kV
1. Safety and reliability: oil-free, made of epoxy resin, fire-proof and explosion-proof, can be installed indoors and in switchboards.
2. Moderate loss: Type 9 energy efficient design, stable operation, high economic efficiency.
3. High short-circuit withstand capability: excellent insulation, high mechanical strength, suitable for operation in 35 kV power transmission networks.
4. Weather and moisture resistance: dust-, moisture-, and pollution-resistant, highly adaptable to the environment.
5. Easy to maintain: equipped with intelligent temperature control, no need lubrication, long service life.
I. Product Definition and Standards
It features Class F insulation (155°C), a fully sealed vacuum epoxy casting, is oil-free, flame-resistant, and explosion-proof, and is an ideal replacement for traditional oil-filled transformers in areas with increased noise, fire safety, and environmental requirements.
II. Key technical parameters (customizable)
Element |
Standard Specification |
Energy efficiency class |
Highly efficient and energy saving transformer |
Nominal lifting capacity |
Standard power: 50 kVA-63000 kVA |
Connection group |
Dean11 |
Cooling mode |
AN (natural air cooling) / AF (forced air cooling) Continuous overload AN is 120%, AF – up to 150%. |
Insulation class |
Class F (155℃) |
Degree of protection |
IP20 (standard); IP30/IP40 optional |
III. Key Performance Benefits
Safe and environmentally friendly
Oil-free, hermetically sealed, fire-resistant, explosion-proof, and does not contaminate the environment with oil.
Can be installed directly in consumption centers (hospitals, airports, high-rise buildings, residential areas, chemical zones) without oil separator pits or fire partitions.
Low losses and energy saving
Meets Type 9 loss standards. Optimized core and winding design reduces both no-load and on-load losses, significantly reducing long-term energy costs.
Energy efficiency exceeds that of older dry and oil-filled transformers.
Resistance to weather conditions and pollution
Completely sealed design: moisture-, dust-, anti-condensation, resistant to contamination.
Stable operation in high-humidity, coastal, and heavily polluted areas. No pre-drying required before restarting after extended periods of inactivity.
Low noise and stable operation
Low-noise silicon steel and structure-borne noise reduction; noise levels are generally below national standards.
High mechanical strength allows it to withstand shocks from the network and short-circuit current.
IV. Typical areas of application
Power grids: 35 kV distribution substations, modernization of urban/rural networks, step-down substations for industrial and mining enterprises.
Key buildings: shopping malls, subways, airports, hospitals, data centers.
Harsh environmental conditions: coastal areas with high humidity, chemical zones, flammable and explosive sites (mines, oil refineries).
Areas sensitive to noise and environmental impacts: residential areas, schools.
