66-110kV Level Oil Immersed Transformer Product Introduction

1. Product Overview

66-110kV level oil immersed transformer is a core high-voltage power transmission and distribution equipment independently developed and manufactured in line with IEC international standards and national power industry specifications. Adopting traditional and mature oil-immersed cooling and insulation technology, this series of transformers is mainly used for voltage conversion, power transmission and load regulation in medium and high-voltage power grids. It can stably operate in continuous full-load conditions, adapting to long-term grid operation and industrial power supply scenarios.

Different from dry-type transformers, the oil immersed structure takes high-quality transformer insulating oil as the cooling and dielectric medium, which effectively improves the heat dissipation efficiency and insulation performance of the equipment. The whole machine features stable structure, strong overload capacity and excellent environmental adaptability. It can work normally in harsh environments such as high temperature, low temperature and outdoor humid climate, and is widely recognized for long service life and low comprehensive operation cost, serving as the key basic equipment for regional power grid construction, industrial park power supply and new energy power delivery.

2. Product Core Parameters

The 66-110kV oil immersed transformer supports multi-specification customized configuration to meet the differentiated demands of power grids, industrial production and new energy projects. The core technical parameters of conventional standard models are as follows:

3. Product Core Features

3.1 Low Loss and High Energy Efficiency

This series of transformers adopts high-quality cold-rolled oriented silicon steel sheets and optimized core stacking process, which greatly reduces no-load loss and no-load current. The winding structure is scientifically designed through electromagnetic simulation to minimize load loss during long-term operation. Compared with traditional old-fashioned transformers, the overall energy consumption is significantly reduced, which can effectively save grid operation and power consumption costs for users, and fully meet the energy-saving and emission-reduction requirements of modern power systems.

3.2 Stable and Safe Operation

The whole machine adopts composite oil-paper insulation system with strong dielectric strength and thermal endurance, which can withstand high voltage impact and short-circuit shock. The sealed oil tank structure is precisely welded to avoid insulating oil leakage. Equipped with pressure relief valve, gas relay, temperature sensor and other complete protection devices, it can real-time monitor the internal operating state of the equipment, automatically alarm and protect in case of overheating, overvoltage and internal faults, ensuring the safety and stability of power supply.

3.3 Strong Environmental Adaptability

The external shell adopts anti-corrosion and rust-proof coating process, which can resist outdoor wind, rain, ultraviolet radiation and atmospheric corrosion. The internal insulating oil has excellent low-temperature fluidity and high-temperature stability, adapting to the operating environment of -40℃ to +45℃. The equipment has low vibration and low noise operation performance, which will not cause noise pollution to the surrounding environment, suitable for outdoor substation, field power station and other complex layout scenarios.

3.4 Flexible Customization and Easy Installation

We support personalized customization of voltage ratio, capacity, cooling mode, tap adjustment mode and installation size. The equipment is integrally assembled and debugged before leaving the factory, with compact overall structure and reasonable layout. On-site installation only needs foundation fixing, wiring and oil injection debugging, which shortens the construction cycle and reduces on-site construction difficulty and labor cost.

4. Application Scenarios

With stable performance and wide adaptability, 66-110kV oil immersed transformers are widely used in various medium and high-voltage power transmission and distribution scenarios, covering public power grids, industrial production and new energy fields:

4.1 Urban and Rural Power Grid Construction

It is applicable for step-up and step-down power transformation of regional central substations, urban distribution substations and rural grid upgrading projects, undertaking the core power transmission task of regional power supply, ensuring stable power supply for residential electricity, commercial facilities and public utilities.

4.2 Large-scale Industrial Power Supply

Suitable for high-power power supply scenarios of industrial parks, mining enterprises, chemical plants, steel mills and other heavy industrial enterprises. It can adapt to fluctuating industrial loads and long-term full-load operation, meeting the high-standard power demand of industrial production and ensuring continuous and stable production.

4.3 New Energy Power Generation Projects

Matched with wind power plants, photovoltaic power stations and energy storage power stations, it is used for step-up power transmission of new energy power generation. It can adapt to the intermittent and fluctuating power output characteristics of new energy, effectively stabilize grid voltage, and realize efficient grid-connected power transmission of new energy power.

4.4 Transportation and Infrastructure

It provides supporting power transformation services for large-scale infrastructure such as railway transit, highway hub and airport power supply stations, ensuring reliable power supply for key national infrastructure projects.

5. Product Daily Maintenance

Scientific and standardized daily maintenance can effectively extend the service life of the transformer and reduce equipment failure rate. The daily maintenance and inspection specifications are as follows:

5.1 Routine Visual Inspection

Regularly check the appearance of the equipment every month, focus on observing whether the oil tank, welding seam and pipeline have oil leakage, whether the shell is rusted or deformed, and whether the bushing surface is clean, cracked or polluted. Clean the dust and dirt on the bushing and radiator in time to ensure normal heat dissipation and insulation performance.

5.2 Regular Oil Quality Testing

Carry out dissolved gas analysis (DGA) and insulation oil performance testing every year to detect internal overheating, partial discharge and potential fault risks of the transformer. Replace the insulating oil regularly according to the operating years and test results to ensure the cooling and insulation effect of the oil body.

5.3 Operational Parameter Monitoring

Real-time monitor the operating temperature, load current, voltage and oil level of the transformer through the supporting monitoring system. Avoid long-term overload operation and sudden load impact. Once abnormal temperature rise, oil level fluctuation or parameter deviation is found, stop operation for inspection in time.

5.4 Component Inspection and Maintenance

Regularly check the working state of protection components such as gas relay, pressure relief device and temperature controller to ensure sensitive and effective action. Fasten the wiring terminals and structural fasteners regularly to prevent loose contact and vibration failure. Lubricate the movable parts of the cooling system and tap changer to ensure flexible operation.

6. After-sales Service Guarantee

6.1 Pre-sale and In-sale Technical Support

We provide one-stop pre-sales technical consultation and scheme customization services. According to the user's on-site working conditions, grid parameters and power demand, professional engineers will design targeted transformer configuration schemes. All products are strictly tested in accordance with international standards before leaving the factory, with complete factory test reports and qualification certificates, to ensure that the delivered products meet user's actual application requirements.

6.2 Warranty Service

The whole machine enjoys a 3-year free warranty, and the core components such as iron core and winding enjoy a 5-year quality guarantee. During the warranty period, any quality failure caused by product design and manufacturing problems will be repaired and replaced free of charge, with no additional maintenance cost for users.

6.3 Quick After-sales Response

We have a professional after-sales service team covering all regions. After receiving the user's fault feedback, the technical team will provide remote guidance and troubleshooting within 2 hours. For on-site maintenance needs, arrange professional engineers to arrive at the site within 24-48 hours according to the regional distance to complete fault repair and equipment commissioning.

6.4 Long-term Technical Service

We provide lifelong technical consultation and equipment maintenance guidance. After the warranty period, users can enjoy preferential spare parts replacement and paid maintenance services. Regularly provide users with equipment operation inspection and maintenance training services to help users standardize operation management and reduce long-term operating costs.