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75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer
75kVA Oil Immersed Transformer

75kVA Oil Immersed Transformer

75kVA oil-immersed transformer is an efficient and reliable power conversion device, which is widely used in power distribution systems in industrial, commercial, and construction sites. The transformer adopts oil-immersed cooling technology, has good heat dissipation performance, and can work continuously and stably under high load conditions. The 75kVA oil-immersed transformer also has complete protection functions, including overload protection, short-circuit protection, and temperature monitoring, to ensure the safety and stability of the equipment during operation.

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Phone/WhatsApp: 8619131285373

Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.

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1. Product Overview

ZISHENG 75kVA Oil Immersed Transformer is a high-performance distribution transformer designed for reliable power transmission and distribution applications. It is widely used in utility networks, industrial facilities, commercial buildings, renewable energy projects, and infrastructure construction.

The transformer adopts high-quality insulating oil as both cooling and insulation medium, providing excellent heat dissipation, strong overload capability, and stable electrical performance during long-term operation.

With optimized electromagnetic design, advanced manufacturing technology, and strict quality control procedures, the 75kVA oil immersed transformer offers low energy loss, high efficiency, excellent short-circuit resistance, and long service life.

It is especially suitable for outdoor substations, rural electrification projects, industrial power supply systems, and areas requiring reliable and economical power distribution solutions.

2. Product Specifications

Parameter Specification
Product Name 75kVA Oil Immersed Transformer
Rated Capacity 75kVA
Transformer Type Oil Immersed Distribution Transformer
Phase Single Phase / Three Phase
Frequency 50Hz / 60Hz
High Voltage Side Customized
Low Voltage Side Customized
Cooling Method ONAN (Oil Natural Air Natural)
Winding Material Copper / Aluminum
Core Material Grain-Oriented Silicon Steel
Insulation Medium Transformer Oil
Installation Type Outdoor / Indoor
Tap Changer Off-Circuit Tap Changer
Tank Structure Sealed Tank / Conservator Type
Protection Level Customized
Standards IEC / ANSI / Customer Requirements

3. Main Structure Design

3.1 High-Efficiency Silicon Steel Core

The 75kVA Oil Immersed Transformer uses high-quality grain-oriented silicon steel sheets with advanced core manufacturing technology.

Features:

  • Low no-load loss
  • Reduced excitation current
  • Improved energy efficiency
  • Lower operating temperature
  • Reduced transformer noise
  • Enhanced operational stability

The optimized core design minimizes energy consumption and improves transformer performance during continuous operation.

3.2 High-Quality Winding System

The transformer windings are manufactured using high-conductivity copper or aluminum conductors.

Advantages:

  • Excellent electrical conductivity
  • Strong mechanical strength
  • High thermal stability
  • Reliable insulation performance
  • Superior short-circuit resistance

The winding structure is designed to withstand electrical and mechanical stress, ensuring safe operation under different load conditions.

3.3 Efficient Oil Cooling and Insulation System

The transformer uses high-quality insulating oil to provide cooling and electrical insulation.

Benefits:

  • Efficient heat transfer
  • Improved temperature control
  • Enhanced insulation performance
  • Better overload capability
  • Stable operation under continuous load

The oil circulation system effectively removes heat generated by the core and windings, extending insulation life and improving reliability.

3.4 Strong Transformer Tank Structure

The transformer tank is manufactured from high-strength steel materials with advanced sealing technology.

Features:

  • Excellent mechanical strength
  • Reliable oil sealing
  • Moisture and dust resistance
  • Outdoor weather protection
  • Long-term durability

The tank structure allows stable operation in harsh environments such as high temperature, humidity, and dusty areas.

4. Product Advantages

High Reliability

ZISHENG 75kVA Oil Immersed Transformer is designed for continuous operation in power distribution systems, providing stable voltage conversion and dependable power supply.

Excellent Heat Dissipation

The oil cooling system provides efficient heat transfer, allowing the transformer to maintain stable temperature during long-term operation and high-load conditions.

Strong Overload Capability

The transformer can handle temporary overload conditions while maintaining safe and reliable operation due to its effective cooling system and robust design.

Superior Short-Circuit Resistance

The reinforced winding structure improves resistance against short-circuit forces and enhances transformer safety and service reliability.

Energy Saving and Low Loss

The transformer adopts advanced low-loss materials and optimized design to reduce:

  • No-load losses
  • Load losses
  • Operating costs

This helps customers improve energy efficiency and reduce total operating expenses.

Long Service Life

High-quality materials, reliable insulation systems, and strict production processes ensure long-term stable operation.

5. Technical Features

Compact and Durable Design

The 75kVA transformer features a compact structure that provides:

  • Easy transportation
  • Simple installation
  • Reduced installation space requirements

Outdoor Application Capability

The sealed oil tank design protects internal components from:

  • Rain
  • Dust
  • Humidity
  • Temperature fluctuations
  • External environmental impact

It is suitable for outdoor power distribution systems.

Low Maintenance Requirement

Compared with other power equipment, the transformer requires limited routine maintenance.

Recommended inspections include:

  • Oil level checking
  • Oil leakage inspection
  • Terminal connection checking
  • Insulation performance testing
  • Grounding system inspection

Flexible Configuration

Optional accessories include:

  • Oil level indicator
  • Temperature indicator
  • Pressure relief device
  • Lightning arrester
  • Conservator tank
  • Buchholz relay (for applicable designs)
  • Protective enclosure

6. Application Areas

Power Distribution Networks

  • Utility distribution systems
  • Medium voltage substations
  • Rural electrification projects
  • Urban power networks

Industrial Applications

  • Manufacturing factories
  • Mining facilities
  • Oil and gas projects
  • Industrial parks

Renewable Energy Projects

  • Solar photovoltaic plants
  • Wind power systems
  • Battery energy storage projects

Commercial Applications

  • Shopping centers
  • Office buildings
  • Residential communities
  • Infrastructure facilities

Special Environmental Applications

  • Remote areas
  • Tropical regions
  • High-temperature locations
  • High-humidity environments

7. Customization Options

ZISHENG provides customized 75kVA Oil Immersed Transformer solutions according to different project requirements.

Available customization:

  • Voltage ratio customization
  • Frequency selection (50Hz/60Hz)
  • Copper or aluminum winding
  • Vector group selection
  • Impedance adjustment
  • Tap changer configuration
  • Tank structure customization
  • Protection accessories
  • Special environmental design

8. Manufacturing and Quality Control

ZISHENG applies strict quality control throughout the complete manufacturing process.

Raw Material Inspection

  • Silicon steel core inspection
  • Copper/aluminum conductor inspection
  • Insulation material inspection
  • Transformer oil quality inspection

Manufacturing Process Control

  • Core assembly inspection
  • Winding process inspection
  • Insulation system inspection
  • Tank welding inspection
  • Vacuum oil filling inspection

Final Testing

Each 75kVA Oil Immersed Transformer undergoes professional testing, including:

  • Winding resistance test
  • Insulation resistance test
  • Voltage ratio test
  • No-load loss test
  • Load loss test
  • Dielectric strength test
  • Oil leakage test
  • Performance verification

Only qualified transformers are approved for shipment.

9. Why Choose ZISHENG 75kVA Oil Immersed Transformer

  • Professional transformer manufacturer
  • Multiple production lines with stable capacity
  • High-quality raw materials
  • Strict quality inspection system
  • Competitive factory-direct pricing
  • Customized engineering solutions
  • Reliable delivery capability
  • International export experience

ZISHENG 75kVA Oil Immersed Transformer provides a reliable, efficient, and cost-effective power distribution solution for utility companies, EPC contractors, industrial users, and electrical equipment distributors worldwide.

75kVA Oil Immersed Transformer Product Q&A

Q1: What is a 75kVA Oil Immersed Transformer?

A: A 75kVA Oil Immersed Transformer is a distribution transformer with a rated capacity of 75kVA that uses transformer oil as the cooling and insulation medium.

It is mainly used to reduce medium voltage electricity to low voltage power for industrial, commercial, agricultural, and infrastructure applications. The oil cooling system provides excellent heat dissipation, strong overload capability, and stable operation for long-term power supply.

Q2: What are the main advantages of a 75kVA Oil Immersed Transformer?

A: The main advantages include:

  • Reliable operation for continuous power distribution
  • Excellent cooling performance
  • Strong overload capacity
  • High short-circuit resistance
  • Low power loss and high efficiency
  • Long service life
  • Durable outdoor structure
  • Suitable for harsh environments
  • Easy integration into power networks
  • Cost-effective solution for distribution systems

Q3: What is the difference between a 75kVA Oil Immersed Transformer and a Dry Type Transformer?

A: The main differences are:

Item 75kVA Oil Immersed Transformer 75kVA Dry Type Transformer
Cooling Method Transformer oil cooling Air cooling
Insulation Medium Insulating oil Solid insulation
Heat Dissipation Excellent Good
Installation Mainly outdoor Mainly indoor
Maintenance Requires oil inspection Lower maintenance
Fire Safety Requires oil protection measures Higher fire resistance
Application Utility networks, substations, outdoor projects Buildings, data centers, indoor facilities

The oil immersed transformer is widely selected for outdoor power distribution projects requiring high reliability and efficient cooling.

Q4: What voltage ratings are available for a 75kVA Oil Immersed Transformer?

A: ZISHENG can customize voltage ratings according to different countries and project requirements.

Common configurations include:

  • High voltage side:
    • 6kV
    • 10kV
    • 11kV
    • 13.8kV
    • 15kV
    • 20kV
    • 35kV
  • Low voltage side:
    • 400V
    • 415V
    • 480V
    • 690V

Customized voltage ratios are available according to local grid standards.

Q5: Is the 75kVA Oil Immersed Transformer available with copper winding?

A: Yes. ZISHENG provides both copper winding and aluminum winding options.

Copper winding advantages:

  • Higher electrical conductivity
  • Lower energy loss
  • Better thermal performance
  • Strong mechanical strength
  • Improved overload capability
  • Longer service life

The winding material can be selected according to project requirements, efficiency targets, and budget.

Q6: Can the 75kVA Oil Immersed Transformer be customized?

A: Yes. ZISHENG provides customized transformer solutions based on different application requirements.

Customization options include:

  • Voltage ratio
  • Frequency (50Hz/60Hz)
  • Copper or aluminum winding
  • Vector group
  • Impedance value
  • Tap changer configuration
  • Tank design
  • Protection accessories
  • Environmental adaptation

Customized solutions ensure the transformer matches the customer's electrical system and installation conditions.

Q7: Where can a 75kVA Oil Immersed Transformer be used?

A: The transformer is widely used in:

  • Utility power distribution networks
  • Outdoor substations
  • Industrial factories
  • Mining projects
  • Solar power plants
  • Energy storage systems
  • Commercial buildings
  • Agricultural electrification
  • Infrastructure projects
  • Remote area power supply systems

Q8: Is a 75kVA Oil Immersed Transformer suitable for outdoor installation?

A: Yes. The transformer is designed for outdoor applications.

The durable oil tank structure provides protection against:

  • Rain
  • Dust
  • Humidity
  • Temperature changes
  • Harsh weather conditions

It can be customized for tropical, high-temperature, and high-humidity environments.

Q9: What type of transformer oil is used in a 75kVA Oil Immersed Transformer?

A: ZISHENG uses high-quality insulating oil designed for transformer applications.

The transformer oil provides:

  • Strong insulation performance
  • Efficient heat transfer
  • Stable chemical properties
  • Reliable cooling capability
  • Improved transformer lifespan

Special oil requirements can be customized according to project specifications.

Q10: How does the oil cooling system improve transformer performance?

A: The oil cooling system transfers heat generated by the transformer core and windings through insulating oil circulation.

Benefits include:

  • Lower operating temperature
  • Improved insulation durability
  • Better overload capability
  • Stable operation under continuous loads
  • Extended transformer service life

Q11: What maintenance is required for a 75kVA Oil Immersed Transformer?

A: Regular maintenance helps maintain safe and reliable operation.

Recommended inspections include:

  • Checking oil level
  • Inspecting oil leakage
  • Checking bushings and terminals
  • Testing insulation condition
  • Inspecting grounding connections
  • Checking protective devices

Proper maintenance ensures stable performance and extends equipment lifespan.

Q12: How does ZISHENG ensure the quality of 75kVA Oil Immersed Transformers?

A: ZISHENG follows strict quality control procedures throughout manufacturing.

Quality inspection includes:

  • Raw material inspection
  • Silicon steel core inspection
  • Winding resistance testing
  • Insulation resistance testing
  • Voltage ratio testing
  • No-load loss testing
  • Load loss testing
  • Dielectric strength testing
  • Oil leakage testing
  • Final performance testing

Each transformer is tested before shipment to ensure reliable operation at the project site.

Q13: What standards can the 75kVA Oil Immersed Transformer comply with?

A: ZISHENG transformers can be manufactured according to:

  • IEC standards
  • ANSI standards
  • Customer technical specifications
  • Local electrical regulations

The final standard depends on the destination country and project requirements.

Q14: Can a 75kVA Oil Immersed Transformer operate in harsh environments?

A: Yes. The transformer can be designed for different environmental conditions, including:

  • High-temperature areas
  • Tropical climates
  • High-humidity regions
  • Dusty industrial locations
  • Coastal environments

The robust tank structure and reliable insulation system ensure stable operation.

Q15: What is the expected service life of a 75kVA Oil Immersed Transformer?

A: A high-quality 75kVA Oil Immersed Transformer can provide decades of reliable operation when properly installed and maintained.

Service life depends on:

  • Operating load
  • Environmental conditions
  • Maintenance frequency
  • Insulation quality
  • Operating temperature

ZISHENG uses high-quality materials and strict manufacturing processes to ensure long-term reliability.

Q16: Why choose ZISHENG 75kVA Oil Immersed Transformer?

A: ZISHENG provides:

  • Professional transformer manufacturing experience
  • Multiple production lines
  • Strict quality management system
  • Factory-direct competitive pricing
  • Customized engineering solutions
  • Reliable production capacity
  • International export experience

ZISHENG 75kVA Oil Immersed Transformer provides a dependable and efficient power distribution solution for utility companies, EPC contractors, industrial users, and electrical equipment distributors worldwide.

75kVA Oil Immersed Transformer75kVA Oil Immersed Transformer

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