On-Load Tap Changer（OLTC）oil-immersed transformer
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Oil-lmmersed Power Transformer
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Oil-immersed on-load tap-changing transformer
Our oil-immersed on-load tap-changing (OLTC) transformer automatically regulates output voltage in real time, ensuring stable power supply even under severe grid fluctuations. It effectively protects electrical equipment, reduces line losses, and improves power quality – ideal for areas with poor voltage stability, such as rural grids, remote mountainous regions, and aging urban networks where daily voltage swings can be significant.
Key features
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On-load automatic voltage regulation – seamless adjustment without power interruption.
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High energy efficiency – lowers long‑term operating costs.
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Robust construction – withstands harsh environments, including high humidity, dust, and temperature extremes.
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Customizable design – supports voltage classes up to 35 kV and rated capacity up to 20,000 kVA (20 MVA) for OLTC transformers.
Typical applications
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Outdoor distribution substations in rural and remote areas.
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Industrial and mining enterprises where oil‑immersed transformers are permitted.
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Drilling platforms and oil production platforms (with appropriate fire protection measures).
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FAQ
Q1. What is the primary function of a three-phase oil immersed transformer?
The primary function is to convert high voltage electricity to lower voltage levels for safe distribution and use.
Q2. How does oil contribute to the performance of transformers?
Oil acts as both an insulator and a cooling medium, helping to dissipate heat and protect winding materials.
Q3. What are the benefits of using biodegradable insulating oils?
Biodegradable oils reduce environmental impact and are safer for the ecosystem in case of leakage.
Q4. How often should maintenance be performed on these transformers?
Regular inspections and maintenance should be conducted at least once a year, along with oil quality testing.
Q5. Can three-phase oil immersed transformers be used in renewable energy applications?
Yes, they are suitable for various applications, including renewable energy systems, to ensure efficient energy conversion and distribution.
Key words:
Oil Immersed Transformer
20-24kV
SZ11 oil-immersed transformer
Transformer with On-Load Tap-Changer
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