75000kVA 110 KV Oil Immersed Transformer

1. Product Overview

The 75000kVA 110KV oil immersed transformer is a high-capacity, high-voltage power transmission and distribution equipment independently developed and manufactured in strict accordance with IEC 60076 international standards and national GB1094 series standards. Designed for medium and large-scale power grid voltage conversion and energy transmission scenarios, this three-phase power transformer adopts mature oil-immersed cooling and insulation technology, featuring stable performance, strong overload capacity and excellent environmental adaptability.

Different from ordinary small and medium-sized transformers, this 75MVA high-power model is optimized in core structure, winding technology and heat dissipation system. It effectively solves the problems of large loss, poor stability and low safety factor of traditional high-voltage transformers under long-term full-load operation. It can operate stably in outdoor harsh environments for a long time, and is the core key equipment for regional power grid upgrading, industrial power matching and new energy power consumption.

2. Core Product Parameters

All parameters are tested and calibrated in accordance with international power equipment testing standards, with stable data and high consistency, meeting the operation requirements of mainstream 110kV power systems at home and abroad.

3. Product Core Features

3.1 Low Loss and Energy Saving

The transformer core adopts high-quality cold-rolled oriented silicon steel sheet, with special rounding and insulation treatment. It effectively reduces magnetic flux leakage and no-load loss, and the overall energy consumption is 15%-20% lower than that of traditional old-fashioned models. It can greatly reduce long-term operation energy consumption for power stations and industrial enterprises, bringing obvious energy-saving and cost-reducing benefits.

3.2 Excellent Structural Stability

The winding is made of high-purity oxygen-free copper wire and processed by integral hot-press molding technology. Combined with high-strength tension cardboard support structure, it has strong short-circuit resistance and mechanical stability, which can effectively resist electromagnetic impact and vibration during sudden load changes. The bell-type oil tank adopts integral welding process with good sealing performance, avoiding oil leakage problems during long-distance transportation and long-term outdoor operation.

3.3 Efficient Heat Dissipation and Stable Operation

Relying on insulating oil as the cooling medium, the equipment realizes rapid heat dissipation through natural convection and forced air cooling. The optimized radiator and corrugated tank structure expand the heat dissipation area, ensuring that the equipment maintains a stable temperature rise even under long-term full-load and slight overload operation, avoiding overheating failure and ensuring continuous and stable power supply.

3.4 High Safety and Low Noise

The whole machine adopts multi-layer insulation protection structure and high-temperature resistant insulation materials, with low partial discharge value and strong lightning impulse resistance. The optimized core vibration reduction design greatly reduces operating noise, and the full-sealed structure can effectively prevent the invasion of dust, rainwater and moisture, adapting to various complex outdoor working conditions.

3.5 Strong Customization and Adaptability

On the basis of standard parameters, it can support customized adjustment of low-voltage voltage, impedance parameters, cooling mode and protection configuration. It can be matched with on-load tap-changer equipment to realize non-power-off voltage regulation, meeting the precise power supply requirements of different industrial and power grid scenarios.

4. Application Scenarios

This 75000kVA 110KV oil immersed transformer is oriented to medium and large-scale power transmission and distribution scenarios, with wide industry coverage and strong scene adaptability, mainly applied in the following fields:

• Regional Power Grid Substations: It is used for step-up and step-down power conversion in urban and rural 110kV core substations, undertaking regional power transmission and distribution tasks, and supporting daily power supply and peak power guarantee of residential and commercial areas.

• New Energy Power Plants: Widely matched with photovoltaic power stations, wind power plants and energy storage power stations, it converts the generated electric energy into grid-standard voltage to realize grid-connected power transmission, solving the problem of new energy power consumption and transmission.

• Large Industrial Enterprises: It provides stable high-voltage power support for heavy industrial enterprises such as steel mills, chemical plants, mines and manufacturing bases with large power consumption, meeting the continuous and high-load power demand of industrial production lines.

• Key Public Infrastructure: It supports power supply guarantee for large airports, ports, railway hubs and industrial parks, ensuring the stability and continuity of key infrastructure power systems.

5. Product Maintenance & After-sales Service

5.1 Daily Maintenance Guidelines

The equipment has low daily maintenance cost and simple operation, and conventional maintenance can be carried out according to the following norms to ensure long-term stable operation:

• Regularly check the oil level, oil color and sealing state of the transformer oil tank every month, and replace the insulating oil regularly every 3-5 years according to the operating environment.

• Check the working state of radiator, cooling fan and temperature control system quarterly to ensure unobstructed heat dissipation and normal temperature monitoring.

• Regularly detect the insulation performance, winding resistance and partial discharge data of the equipment, and eliminate potential electrical hazards in advance.

• Clean the dust and sundries on the surface of the equipment and accessories regularly to avoid affecting heat dissipation and insulation performance.

5.2 Professional After-sales Service

We provide one-stop full-cycle after-sales support for all sold transformers, with practical and reliable service guarantees:

• Warranty Guarantee: The whole machine enjoys a 3-year free warranty, and core components such as iron core and winding enjoy 10-year quality guarantee. During the warranty period, all quality failures caused by manufacturing problems are repaired and replaced free of charge.

• Technical Support: Provide 24/7 online technical consultation service, respond to customer fault feedback within 2 hours, and provide professional solution guidance.

• On-site Service: For on-site equipment faults that cannot be solved remotely, arrange professional engineers to arrive at the site for maintenance and debugging within the shortest time according to regional distribution.

• Lifelong Maintenance: Provide lifelong paid maintenance and component replacement services after the warranty period, and regularly push equipment maintenance reminders and optimization suggestions.

• Installation Guidance: Provide free on-site installation, commissioning and operation training services to help customers' operation and maintenance teams master professional operation skills.