DG Series Single Phase Isolation Transformer

Dry Type Electrical Isolation Transformer for Industrial Equipment & Power Systems

Voltnex Power manufactures DG series single phase isolation transformers designed for industrial equipment, CNC machines, automation systems, machine tools, electrical control panels and sensitive electrical loads.

The standard configuration provides 220V input and 220V output, creating a 1:1 electrical isolation transformer that maintains the required voltage while electrically separating the primary and secondary circuits.

Custom voltage, capacity, enclosure and connection configurations are available for OEM equipment manufacturers, industrial projects and wholesale applications.

2–30kVA | Single Phase | Dry Type | 50/60Hz | 1:1 Isolation | Custom Available

Request a Quote
Get Technical Support

DG Series Single Phase Isolation Transformer

The DG series single phase isolation transformer is a dry type transformer designed to transfer AC power while providing electrical isolation between the input and output circuits.

Unlike a standard transformer selected mainly for voltage conversion, a 1:1 isolation transformer can maintain approximately the same voltage level while separating the primary and secondary electrical circuits.

The standard 220V to 220V isolation transformer configuration is suitable for industrial equipment requiring an isolated AC power supply. It can be used with CNC machines, automation equipment, machine tools, electrical cabinets, testing equipment and other industrial electrical systems.

Voltnex Power also provides custom single phase isolation transformers with different input voltages, output voltages, capacities and enclosure designs.

Key Features

Electrical Isolation

Provides galvanic isolation between the primary and secondary circuits for industrial electrical equipment and power systems.

1:1 Voltage Configuration

The standard configuration provides 220V input and 220V output, maintaining the voltage while providing electrical isolation.

Dry Type Construction

Dry type design without insulating oil, suitable for industrial installations, electrical equipment and indoor applications.

Industrial Equipment Power Supply

Designed for CNC machines, automation systems, machine tools, control panels and other industrial electrical equipment.

Multiple Capacity Options

Standard capacities range from 2kVA to 30kVA, with custom capacity options available.

Enclosed Cabinet Design

The enclosed construction helps protect internal transformer components and supports convenient industrial installation.

Custom Manufacturing

Input voltage, output voltage, rated capacity, frequency, enclosure and connection configuration can be customized according to project requirements.

Technical Specifications

Note: Standard specifications are for reference. Input voltage, output voltage, capacity, enclosure and other electrical parameters can be customized according to project requirements.

DG Series Model & Capacity

Custom capacities and voltage configurations are available for specific industrial equipment and OEM applications.

How Does a Single Phase Isolation Transformer Work?

A single phase isolation transformer transfers electrical power from the primary winding to the secondary winding through electromagnetic induction.

The primary and secondary windings are electrically separated and are not directly connected. Electrical energy is transferred through the transformer’s magnetic core.

In a standard 220V to 220V configuration, the transformer maintains approximately the same output voltage while providing electrical isolation between the incoming power supply and the connected equipment.

Basic Power Flow

AC Input → Primary Winding → Magnetic Core → Secondary Winding → Isolated AC Output → Connected Equipment

This makes the DG series suitable for applications where electrical separation between the power source and industrial equipment is required.

Why Use an Isolation Transformer for Industrial Equipment?

A single phase isolation transformer is commonly used when industrial equipment requires electrical separation from the upstream power supply.

Typical applications may benefit from:

• Electrical isolation between input and output circuits
• Separation of industrial equipment from the upstream power system
• Reduced coupling of certain electrical disturbances
• Isolated power for control and automation equipment
• Improved power interface for sensitive electrical loads
• Flexible voltage and capacity configuration
• Suitable power supply for testing and maintenance applications

Actual performance depends on the transformer design, grounding arrangement, connected load and characteristics of the electrical system.

Industrial Applications

CNC Machines

Provides isolated power for CNC machine tools and related electrical control equipment.

Industrial Automation

Suitable for automation equipment, PLC systems, sensors and industrial control circuits.

Machine Tools

Can be used as an isolated power source for machine tools and auxiliary electrical systems.

Electrical Control Panels

Suitable for electrical cabinets, relays, contactors and industrial control equipment.

Testing Equipment

Provides isolated AC power for laboratory equipment, electrical testing and maintenance applications.

Industrial Machinery

Suitable for production equipment, factory automation systems and industrial electrical loads.

Sensitive Electrical Equipment

Can provide an electrically isolated AC power interface for equipment requiring separation from the upstream electrical system.

Custom Single Phase Isolation Transformer

Every industrial power system has different voltage, capacity and installation requirements.

Voltnex Power provides custom single phase isolation transformers for OEM equipment manufacturers, electrical contractors, system integrators, industrial distributors and international projects.

Custom options include:

• Input voltage
• Output voltage
• Rated capacity
• 50Hz or 60Hz frequency
• 1:1 isolation configuration
• Step-up or step-down voltage configuration
• Transformer dimensions
• Enclosure design
• Terminal arrangement
• Cable entry
• Cooling configuration
• Installation method
• OEM and project requirements

Whether you need a 120V isolation transformer, 220V isolation transformer, 230V isolation transformer, 240V isolation transformer or another custom voltage configuration, our engineering team can provide a suitable industrial transformer solution.

Why Choose Voltnex Power?

Factory Direct Manufacturing

Voltnex Power supplies industrial transformers directly for OEM, wholesale, distributor and project requirements.

Custom Electrical Design

Transformer voltage, capacity and construction can be configured according to your equipment and electrical system.

Industrial Application Experience

Our transformers are designed for industrial machinery, automation equipment, electrical control systems and power distribution applications.

OEM & Custom Manufacturing

We support customized transformer manufacturing for equipment manufacturers, electrical contractors and industrial projects.

Global Supply

Factory-direct solutions are available for customers, distributors and industrial projects worldwide.

Technical Support

Provide your input voltage, output voltage, capacity and application requirements, and our team can help recommend a suitable transformer configuration.

Frequently Asked Questions

1. What is a single phase isolation transformer?

A single phase isolation transformer transfers AC power between primary and secondary windings while maintaining electrical isolation between the two circuits. It is commonly used for industrial equipment, control systems and electrical loads requiring an isolated power supply.

2. What is the DG series isolation transformer used for?

The DG series is designed for CNC machines, machine tools, industrial automation, electrical control cabinets, testing equipment and other industrial applications requiring electrical isolation.

3. Is the DG transformer a step-down transformer?

The standard configuration is 220V input and 220V output, making it primarily a 1:1 isolation transformer rather than a step-down transformer. Custom step-down or step-up voltage configurations may also be available.

4. What does a 1:1 isolation transformer mean?

A 1:1 isolation transformer has approximately the same primary and secondary voltage. For example, a 220V input and 220V output transformer can provide electrical isolation without significantly changing the voltage level.

5. Is the DG transformer dry type?

Yes. The DG series is a dry type isolation transformer and does not use insulating oil.

6. What capacities are available?

The standard DG series covers approximately 2kVA to 30kVA. Custom capacities may be available depending on the application and electrical requirements.

7. Can the input and output voltage be customized?

Yes. Voltnex Power can manufacture custom isolation transformers with different input and output voltages according to your equipment and power system requirements.

8. Can I use an isolation transformer for CNC equipment?

Yes. Isolation transformers are commonly used with CNC machines, machine tools and industrial automation equipment where electrical separation between the equipment and upstream power supply is required.

9. Does an isolation transformer reduce electrical noise?

Electrical isolation can reduce the transfer of certain conducted disturbances between the primary and secondary circuits. Actual results depend on transformer design, grounding, load characteristics and the electrical environment.

10. What is the difference between an isolation transformer and a regular transformer?

A regular transformer is often selected mainly for voltage conversion. An isolation transformer is specifically designed to provide electrical separation between the primary and secondary circuits and may use a 1:1 voltage ratio.

11. What voltage isolation transformers can you manufacture?

We can provide custom configurations including 110V, 120V, 220V, 230V and 240V, depending on the required input voltage, output voltage, frequency and application.

12. Can Voltnex Power manufacture OEM isolation transformers?

Yes. We support OEM and custom transformer manufacturing, including customized voltage, capacity, enclosure, terminal arrangement and electrical configuration.

13. How do I choose the right kVA capacity?

The transformer capacity should be selected according to the connected load, continuous operating power and possible startup or inrush current. For equipment with motors or other high-inrush loads, additional capacity may be required.

14. Can the DG transformer be used for 50Hz and 60Hz systems?

Yes. The transformer can be configured for 50Hz or 60Hz applications according to the required electrical system.

15. What information is needed for a quotation?

Please provide:

• Input voltage
• Output voltage
• Frequency
• Required kVA capacity
• Application
• Load type
• Installation requirements
• Quantity
• Any required drawings or specifications

Photos or nameplate information from the equipment can also help our engineering team recommend a suitable transformer.

Need a Custom Single Phase Isolation Transformer?

Tell us your input voltage, output voltage, frequency, kVA capacity and application requirements.

Voltnex Power can provide a factory-direct single phase isolation transformer solution for CNC machines, automation equipment, industrial machinery, electrical control systems and OEM applications.

Request a Quote

Contact Us for Technical Support