Product Overview

The DG Open Type Single-Phase Isolation Transformer is designed for indoor industrial and electrical control applications where compact installation, efficient cooling, and convenient wiring access are required. Unlike fully enclosed NEMA 3R models intended for outdoor or harsh environments, the open-type structure provides better ventilation and easier maintenance for protected indoor installations.

Built with 100% copper winding, the transformer effectively isolates electrical noise, suppresses voltage fluctuations, and delivers stable 120V / 240V power for sensitive equipment and industrial systems.

Standard capacities from 2KVA to 30KVA are available from stock, while larger capacities and custom voltage combinations can be manufactured according to project requirements.

Key Features

Open-type Design for Indoor Electrical Systems

The open-frame structure allows direct access to terminals and internal components, making installation, inspection, and maintenance faster and more convenient than enclosed transformer designs.

Compared with NEMA 3R enclosed transformers, the open-type version offers:

• Better natural ventilation

• Easier cable connection

• Reduced overall weight

• More compact installation

• Lower enclosure cost

Ideal for:

• Control cabinets

• Electrical panels

• Industrial equipment

• Machine automation systems

• Indoor power distribution systems

120V / 240V Voltage Isolation Protection

The transformer provides safe electrical isolation between input and output circuits, helping reduce:

• Electrical interference

• Voltage spikes

• Ground loop issues

• Equipment instability

It is suitable for powering sensitive loads that require stable and clean single-phase voltage.

100% Copper Winding Construction

High-quality copper winding ensures:

• Higher efficiency

• Lower heat generation

• Stable long-term operation

• Better overload capability

• Longer service life

Excellent Heat Dissipation Performance

Without a sealed metal enclosure, the open-type transformer achieves more efficient airflow and heat dissipation, helping maintain lower operating temperatures during continuous operation.

Advantages include:

• Lower temperature rise

• Improved operational stability

• Extended component lifespan

Compact & Flexible Installation

The open-type structure is suitable for:

• Cabinet mounting

• Base mounting

• OEM equipment integration

• Industrial control systems

Its compact footprint allows flexible installation in limited spaces.

Technical Specifications

Typical Applications

The DG Open Type Isolation Transformer is widely used for:

• Industrial automation equipment

• CNC machines

• Control panels

• Laboratory equipment

• Communication systems

• Electronic testing devices

• Imported equipment voltage conversion

Open Type vs NEMA 3R Enclosed Type

Customization Service

We provide customized solutions, including:

• Input/output voltage

• Capacity range

• Terminal configuration

• Mounting structure

• Frequency options

• OEM branding

Contact us for technical support, drawings, and a quotation.