100 kVA Industrial Dry-Type Step-Down Isolation Transformer, Three Phase 480V to 208Y/120V Power Transformer

The 100kVA three phase dry-type step-down isolation transformer is a high-capacity industrial power transformer engineered for reliable power distribution, electrical isolation, and voltage conversion in demanding industrial and commercial environments. Designed to support three phase power systems, this dry-type isolation transformer commonly steps down 480V primary voltage to 208Y/120V secondary voltage, while also supporting a wide range of other standard industrial voltages for global applications.

As a 100 kVA isolation transformer, this unit is ideally suited for medium-to-large industrial loads where stable voltage, safety, and long-term reliability are critical. The dry-type, oil-free construction makes it suitable for indoor installations and applications requiring enhanced fire safety, low maintenance, and environmentally friendly operation.

Technical Specifications – 100kVA Dry-Type Isolation Transformer

Electrical Isolation & Voltage Conversion Principle

The 100kVA three phase dry-type isolation transformer operates on the principle of electromagnetic induction, using separate primary and secondary windings to provide full galvanic isolation between the power source and the load. This isolation helps protect downstream equipment from electrical noise, voltage spikes, grounding faults, and harmonic interference commonly found in industrial power systems.

In addition to step-down transformer applications such as 480V to 208Y/120V, this industrial isolation transformer can also be configured for step-up voltage conversion, supporting common industrial voltages including 380V, 400V, 415V, 440V, and other customized input or output voltage combinations. This flexibility allows the transformer to adapt to different regional grid standards and project requirements.

Materials, Core Design & Construction

The 100kVA dry-type three phase isolation transformer is manufactured using high-quality laminated silicon steel cores designed to minimize core loss, reduce vibration, and improve overall efficiency. The windings are made from high-purity copper or aluminum conductors, ensuring excellent electrical conductivity, thermal performance, and mechanical strength under continuous load conditions.

The dry-type insulation system is available in Class F or Class H, providing reliable thermal endurance for industrial duty cycles. Compared with oil-filled transformers, the dry-type construction eliminates the risk of oil leakage, reduces maintenance requirements, and improves operational safety, making this industrial dry-type power transformer ideal for factories, commercial buildings, and indoor power rooms.

Performance Advantages for Industrial Power Distribution

The 100kVA three phase dry-type isolation transformer offers multiple performance advantages for modern power distribution systems:

• Stable and efficient three phase power distribution

• Safe electrical isolation for sensitive electrical loads

• Flexible step-down and step-up voltage conversion

• Support for multiple low-voltage and medium-voltage options

• Reduced electrical noise and improved power quality

• Long service life under continuous industrial operation

Whether used as a step-down isolation transformer, industrial voltage transformer, or three phase power transformer, the 100kVA unit ensures consistent performance across a wide range of operating environments.

Typical Applications & Industry Use

This 100kVA industrial dry-type isolation transformer is widely used across diverse industries and applications, including:

• Industrial manufacturing plants and production lines

• Electrical control panels and automation systems

• Data centers and IT power distribution

• HVAC systems and motor control centers

• Commercial buildings and infrastructure projects

• Renewable energy auxiliary power systems

• Utilities and industrial power distribution networks

Its ability to handle multiple voltage standards makes it suitable for both localized installations and international projects requiring flexible electrical configurations.

Compliance with Global Standards & Regional Requirements

The 100kVA three phase dry-type isolation transformer is designed to meet a wide range of international standards and regional requirements. It can be manufactured in compliance with ANSI, IEEE, IEC, and applicable efficiency standards, ensuring compatibility with power systems in North America, Europe, the Middle East, Southeast Asia, South America, and Australia.

Common application regions include the United States, Canada, Brazil, Argentina, Germany, France, Russia, Saudi Arabia, the United Arab Emirates, Australia, Indonesia, Malaysia, and the Philippines, as well as other global markets. Voltage configurations and technical specifications can be adjusted to match local grid requirements and project standards.

Project Case Study – Industrial Power Distribution Upgrade

100kVA Dry-Type Isolation Transformer for Manufacturing Facility

A 100kVA three phase dry-type step-down isolation transformer was supplied for an industrial manufacturing facility power distribution upgrade project. The customer required a reliable industrial isolation transformer to convert 480V three phase input voltage to 208Y/120V output voltage for multiple downstream systems, including production equipment, control panels, and auxiliary loads.

The project was implemented in an international industrial environment with design requirements aligned to North American and IEC standards. Due to strict safety regulations and indoor installation conditions, the client selected a dry-type, oil-free isolation transformer to eliminate fire risk, reduce maintenance, and ensure long-term operational stability.

Project Requirements

• Stable three phase power distribution for continuous industrial operation

• Full electrical isolation to protect sensitive control equipment

• Step-down voltage conversion from 480V to 208Y/120V

• Compliance with ANSI / IEEE / IEC standards

• Suitability for indoor industrial installation

Solution & Performance

The 100kVA industrial dry-type isolation transformer was configured with a Wye–Wye connection and grounded neutral, providing clean and balanced power output. High-quality core materials and Class F insulation ensured low losses, reduced temperature rise, and reliable operation under full load conditions.

After commissioning, the transformer delivered stable voltage performance, improved power quality, and effective isolation from upstream disturbances. The customer reported reduced electrical noise, improved system reliability, and seamless integration with existing power infrastructure.

Global Application Value

This project demonstrates how the 100kVA dry-type step-down isolation transformer can be successfully applied in industrial facilities across multiple regions, including the United States, Canada, Germany, France, Brazil, Saudi Arabia, the United Arab Emirates, Australia, Indonesia, Malaysia, and the Philippines, where different voltage standards and compliance requirements must be met.

Manufacturing Capability, Supply & Global Sales

This 100kVA dry-type step-down isolation transformer is produced by a China-leading manufacturer, supplier, wholesale exporter, and factory specializing in industrial power equipment. Strict quality control is applied throughout the manufacturing process, from raw material selection and winding assembly to final testing and inspection.

With strong production capacity and export experience, the transformer is supplied globally to distributors, EPC contractors, and industrial customers. Both standard models and customized solutions are available for small-batch orders, bulk wholesale supply, and long-term project cooperation.

OEM, ODM & Custom Branding Support

To support global partners and project-based customers, OEM, ODM, and custom branding services are available for the 100kVA three phase dry-type isolation transformer. Custom options include voltage configurations, enclosure types, insulation classes, labeling, and nameplate specifications. This flexibility allows the transformer to be seamlessly integrated into different systems, brands, and regional markets.

Reliable Power Solution for Global Industrial Projects

With high capacity, flexible voltage options, and proven dry-type construction, the 100kVA three phase dry-type step-down isolation transformer is a dependable solution for industrial and commercial power systems worldwide. Whether used as an industrial isolation transformer, step-down power transformer, step-up voltage transformer, or three phase dry-type power transformer, it delivers safe, efficient, and stable electrical performance for global applications.

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