Table of Contents
Introduction
Oil-immersed power transformers play a pivotal role in the distribution and transmission of electrical energy. These transformers are renowned for their durability, reliability, and efficiency in converting electrical voltage levels. This article elucidates the core features of oil-immersed power transformers and reviews the solutions provided by HOLEEP Company in this domain.
Features of Oil-Immersed Power Transformers
Insulation System
The insulation system in oil-immersed transformers typically utilizes mineral oil as the insulating medium. This oil serves as both an insulator and a coolant. With dielectric strengths reaching 10-15 kV/mm, these transformers effectively manage high voltage levels, ensuring operational safety and efficiency.
Cooling Methods
Oil-immersed transformers primarily employ two cooling methods: ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced). The ONAN method involves natural convection processes, while ONAF incorporates fans to enhance heat dissipation. Typical temperature rises are maintained within 65°C over ambient temperature.
Efficiency and Losses
These transformers boast high efficiency levels, often exceeding 98%. Losses are primarily categorized into two types: core losses and copper losses. Core losses occur due to magnetic flux in the core, typically amounting to 0.1-0.4% of the transformer's capacity. In contrast, copper losses arise due to resistance in the windings and are load-dependent.
Voltage Regulation
The voltage regulation in oil-immersed transformers remains within optimal ranges, usually between 0.5% to 2%. This ensures a stable voltage output, crucial for sensitive electrical applications. The use of tap changers facilitates the adjustment of voltage levels to align with load variations.
HOLEEP Company Solutions
HOLEEP Company, a leader in transformer manufacturing, offers advanced solutions tailored to specific customer needs. Their oil-immersed transformers feature state-of-the-art insulation systems, enhanced cooling technologies, and superior design for optimal voltage regulation and efficiency. HOLEEP's transformers are known for their robust construction, adhering to international standards such as IEC 60076 and ISO 9001, ensuring long-term reliability and performance.
References
- IEC 60076: Power Transformers Standard
- ISO 9001: Quality Management Systems
- HOLEEP Company Website
- IEEE Standards Association: C57.12.00 Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers
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