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66 kV Three Phase Power Oil Immersed Transformer

The 66 kV Three Phase Power Oil Immersed Transformer from Zisheng is designed to deliver reliable and efficient performance for medium to high-voltage power transmission systems. As a trusted Manufacturer and global Supplier, Zisheng integrates advanced core technology, high-quality insulation materials, and strict production standards to ensure stable operation and long service life. This transformer features excellent thermal performance, low loss design, and strong overload capability. With fully customizable configurations, it can meet diverse project requirements in substations, industrial plants, and renewable energy systems, providing dependable and energy-efficient power distribution solutions worldwide.
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What is a 66 kV Three Phase Power Oil Immersed Transformer?

A 66 kV Three Phase Power Oil Immersed Transformer is a critical electrical device used in medium-voltage transmission networks to step up or step down voltage levels. It utilizes insulating oil for both cooling and insulation, ensuring efficient heat dissipation and safe operation under continuous load conditions.

Why choose a 66 kV Three Phase Power Oil Immersed Transformer?

This transformer is widely selected for its high efficiency, stable performance, and durability. Its oil immersion system enhances insulation strength and cooling efficiency, making it ideal for substations, industrial applications, and grid infrastructure projects.

How does a 66 kV Three Phase Power Oil Immersed Transformer improve efficiency?

By adopting high-grade silicon steel cores and optimized winding structures, the transformer significantly reduces no-load and load losses. The advanced oil circulation system ensures effective cooling, improving operational efficiency and extending equipment lifespan.

Can a 66 kV Three Phase Power Oil Immersed Transformer be customizable?

Yes, as an experienced Manufacturer, Zisheng offers fully customizable solutions including voltage ratings, capacity, cooling methods, tap changer types (OLTC/Off-load), and protection levels to match specific project needs and standards.

What applications are suitable for a 66 kV Three Phase Power Oil Immersed Transformer?

This transformer is commonly used in utility substations, industrial power distribution, renewable energy integration, mining operations, and infrastructure development projects where reliable and continuous power supply is essential.

What is a 220 kV Three Phase Power Oil Immersed Transformer?

A 220 kV Three Phase Power Oil Immersed Transformer is a high-capacity electrical device used to transfer electrical energy between circuits through electromagnetic induction. It uses insulating oil for cooling and insulation, ensuring safe and efficient performance in high-voltage transmission networks.

Why is a 220 kV Three Phase Power Oil Immersed Transformer widely used?

This transformer is widely used due to its excellent cooling performance, high insulation strength, and ability to handle large loads continuously. It is particularly suitable for national grids, substations, and large industrial applications where reliability is critical.

How does a 220 kV Three Phase Power Oil Immersed Transformer ensure efficiency?

The transformer uses high-quality silicon steel cores and advanced winding technology to reduce energy losses. Its oil circulation system efficiently dissipates heat, maintaining optimal operating temperatures and improving overall system efficiency.

Can a 220 kV Three Phase Power Oil Immersed Transformer be customizable?

Yes, as an experienced Manufacturer, Zisheng provides fully customizable solutions. Parameters such as capacity, voltage ratio, cooling method, and protection systems can be tailored to meet specific project requirements.

What are the advantages of using a 220 kV Three Phase Power Oil Immersed Transformer?

Key advantages include strong overload capacity, excellent short-circuit resistance, long operational life, and reliable performance in extreme climates. These features make it an ideal choice for demanding power transmission applications.


A regional power utility in Kenya upgraded its 66 kV substation using Zisheng transformers, improving voltage stability and reducing transmission losses across rural distribution networks.

In Vietnam, an industrial park developer selected Zisheng as the Supplier to provide customizable transformer solutions, ensuring stable power supply for manufacturing facilities with varying load demands.

A mining company in Kazakhstan deployed Zisheng 66 kV Three Phase Power Oil Immersed Transformer to ensure reliable operation in extreme temperature conditions and remote locations.

In Brazil, a renewable energy EPC contractor integrated Zisheng transformers into a wind power project, achieving efficient energy transmission and long-term operational stability.

Parameter

Specification

Rated Voltage

66 kV

Rated Capacity

10 MVA – 100 MVA

Phase

Three Phase

Frequency

50 Hz / 60 Hz

Cooling Method

ONAN / ONAF

Vector Group

YNd11 / YNyn0 (Customizable)

Insulation Level

LI 325 kVp / AC 140 kV

Temperature Rise

≤ 65K

Tap Changer

OLTC / Off-load

Standards

IEC / ANSI / GB

What is the expected lifespan of a 66 kV Three Phase Power Oil Immersed Transformer?
The transformer typically operates for 25 to 30 years with proper maintenance and monitoring.

How is the cooling performance ensured in this transformer?
The oil circulation system combined with radiators ensures efficient heat dissipation under various load conditions.

Is it possible to customize the transformer for specific grid requirements?
Yes, Zisheng provides customizable designs to meet different voltage levels, capacities, and environmental conditions.

What maintenance is required for this transformer?
Regular oil testing, inspection of insulation systems, and routine checks of electrical components are recommended.

Does the transformer comply with international standards?
Yes, it is manufactured according to IEC, ANSI, and GB standards, ensuring safety and quality.

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