6kV Dry-Type Transformer

6kV epoxy resin cast dry-type transformers are designed for 6kV/0.4kV, 50Hz power distribution and transformation systems, widely applied in residential communities, commercial complexes, public venues, industrial and mining enterprises, photovoltaic power stations, urban indoor power distribution networks and other scenarios. The products strictly comply with GB 1094 national standard for power transformers, IEC 60076 international standard for dry-type transformers and GB/T 10228 technical specification for dry-type transformers, featuring core advantages including oil-free fire resistance, low energy loss, maintenance-free operation and eco-friendliness. HY TRANSFORMER is a high-tech enterprise specializing in power transformers, capable of R&D, production and sales of full-series transformers of 220kV and below. Its dry-type product line covers SC(B)10, SC(B)11, SC(B)12 epoxy resin cast dry-type transformers and Class H non-sealed dry-type power transformers. The company also provides supporting YB European-style box-type substations and American prefabricated substations, delivering one-stop complete power distribution solutions.

1. Premium Raw Materials & Mature Casting Technology

The iron core adopts cold-rolled silicon steel sheets with high magnetic permeability and low loss, while windings are made of 99.9% oxygen-free pure copper wires.

Coils are integrally cast and formed via vacuum pressure epoxy resin pouring, with optional Class F/H high-temperature resistant insulation systems. After curing, the integral sealed structure delivers excellent moisture and dust resistance with extremely low partial discharge. It adapts to complex working conditions such as photovoltaic harmonic interference and heavy-load power grids, fully meeting manufacturing standards for dry-type transformers and photovoltaic step-up transformers.

2. Fire Safety, Zero Pollution & Environmental Compliance

The unit contains no insulating oil, completely eliminating risks of oil leakage, fire and explosion as well as hazardous waste oil disposal issues.

It generates no pollutants during operation and can be directly installed in densely occupied indoor spaces including basements, shopping malls, hospitals and office buildings. Certified for fire retardancy, it is ideal for green buildings and low-carbon photovoltaic projects. Optional protection grades IP20/IP23/IP30 provide moisture and salt fog resistance to ensure stable operation in humid and dusty environments.

3. High Efficiency & Low Loss with Long-Term Stable Operation

Magnetic circuits and winding structures are optimized for 6kV power distribution systems, with no-load and load losses exceeding national Class 1 energy efficiency standards.

It features controllable temperature rise and low noise (≤50dB at 1 meter), strong resistance to short-circuit shocks and harmonics, enabling continuous stable operation under grid-connected photovoltaic and long-term heavy-load grid conditions. Equipped with intelligent temperature-controlled cooling fans, it can operate at 140% overload for a short period under forced air cooling, with a service life of over 30 years.

4. Modular Structure Supporting Customized Solutions

Adopting standardized modular design, the rated capacity, voltage tapping range, connection symbol, impedance voltage, enclosure and temperature control system can all be customized on demand.

Customized photovoltaic dedicated step-up dry-type transformers, rectifier dry-type transformers and special isolation dry-type transformers are available to suit diverse scenarios including urban and rural power grids, photovoltaic power stations, factory workshops and building supporting facilities.

5. Easy Installation & Maintenance with Lower Comprehensive Costs

The compact unit requires no oil sump or fire separation pool, and can be installed close to load centers to shorten cables and reduce line losses. Daily maintenance only involves simple dust removal and inspection, with no periodic oil replacement or oil quality testing required, resulting in a low failure rate. A complete intelligent temperature control system (over-temperature alarm, trip protection, RS485 remote communication) is equipped to support remote monitoring of intelligent power distribution rooms.

6. Strong Manufacturer Capacity for Stable Supply

Equipped with large-scale professional production lines for dry-type transformers and abundant completed industry engineering projects, we maintain sufficient production capacity to stably supply bulk orders of full-capacity 6kV dry-type distribution transformers and photovoltaic-special dry-type transformers.

On-site installation guidance and lifetime after-sales technical support are provided.

The 6kV epoxy resin cast dry-type distribution transformer is specially designed for 6kV/0.4kV, 50Hz power transmission and distribution facilities, and widely applied in the following fields:

• Power distribution rooms supporting large residential communities and high-rise buildings

• Large commercial buildings including shopping malls, office buildings, hotels, airports and stations

• Public livelihood facilities such as hospitals, schools and stadiums

• Indoor power distribution workshops of metallurgical, chemical, manufacturing and other industrial & mining enterprises 

• Mountainous and distributed photovoltaic power stations (custom dry-type step-up transformers available)

• Urban indoor distribution substations, underground pipe galleries, data centers and power supply systems supporting rail transit

Q1: Can the 6kV dry-type transformer be used in photovoltaic power stations? Do its losses comply with IEC standards?

A: Yes. Our factory can customize photovoltaic dedicated step-up dry-type transformers with full copper windings based on the 6kV dry-type transformer body. Its no-load and load losses fully meet the energy efficiency indexes specified in IEC 60076 for dry-type transformers. The epoxy resin cast structure boasts strong resistance to harmonic surges, so it can serve as both photovoltaic step-up equipment and general distribution transformers for industrial, mining and power grid applications.

Q2: What are the advantages and disadvantages of a 6kV dry-type transformer compared with an oil-immersed transformer of the same capacity?

A: Advantages of dry-type transformers:

1. Oil-free, fireproof and explosion-proof, the top choice for indoor and densely populated areas; no fire oil storage facilities required.

2. Near maintenance-free; no annual maintenance work such as oil replacement and oil testing, leading to lower long-term operation and maintenance costs.

3. No risk of oil leakage pollution, eco-friendly and compliant, suitable for underground and enclosed power distribution spaces.

4. Moisture and dust resistant; can be directly put into operation after long-term shutdown with low risk of breakdown caused by dampness.

5. Compact size, can be installed close to load centers to reduce line power loss.

Disadvantages of dry-type transformers:

1. Higher purchase cost than oil-immersed transformers at the same capacity.

2. Air cooling efficiency is inferior to insulating oil, with weaker long-term continuous overload capacity.

3. Oil-immersed transformers are preferred for large-capacity, unattended outdoor remote power grid scenarios.

Q3: What functions does the temperature control system equipped with dry-type transformers have?

A: A standard intelligent temperature controller is equipped to monitor the temperature of three-phase windings in real time. It features sound and light alarm for over-temperature and trip protection for ultra-high temperature. It supports RS485 communication interface to connect to the background monitoring system of power distribution rooms. Cooling fans will automatically start when the temperature reaches the set threshold to reduce winding temperature rise and improve overload capacity.

• GB 1094.1~11 National Standard for Power Transformers

• GB/T 10228 Technical Parameters and Requirements for Dry-Type Power Transformers

• IEC 60076-11 International Standard for Dry-Type Power Transformers

• GB 20052 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Three-Phase Distribution Transformers

• GB/T 7354 Partial Discharge Measurement