STG Series Single Phase Variac Transformer

Product Overview

The STG Series Single Phase Variac Transformer is a manually adjustable AC voltage control solution developed for applications requiring smooth, continuous and reliable output voltage regulation. It is widely used by electrical engineers, equipment manufacturers, factories, laboratories and industrial users around the world.

With a standard 220VAC input and an adjustable output range of 0–300VAC, the transformer allows users to regulate the output voltage simply by rotating the control knob. Customized input voltage, output voltage, capacity and configuration are also available according to different equipment and project requirements.

The STG Series features high efficiency, low electrical loss, full rated capacity and no additional waveform distortion. It can be used with resistive, inductive and capacitive loads when properly selected according to load characteristics.

A multifunction digital display provides clear operating information including voltage, current, power, frequency and energy consumption, making the Single Phase Variac Transformer convenient for testing, commissioning and industrial voltage adjustment.

Features and Advantages

• Continuous and smooth manual voltage adjustment

• Wide adjustable output voltage range

• High output accuracy up to ±2%

• No additional waveform distortion

• High efficiency and low power loss

• Full-capacity design

• Suitable for continuous operation

• Suitable for resistive, inductive and capacitive loads

• High-quality copper winding

• High-conductivity carbon brush design

• Multifunction digital display

• Strong insulation performance

• Reliable electrical terminals

• Durable metallic enclosure

• Simple and convenient operation

• Long service life

• Customized voltage and capacity available

Typical Applications

The Single Phase Variable Transformer is suitable for a wide range of industrial and electrical applications, including:

CNC machines, machine tools, robots, laser cutting machines, air compressors, generators, alternators, photovoltaic systems, conveyor equipment, motor testing systems, furnaces, laboratory equipment, precision instruments, imported machinery, medical equipment, electrical testing equipment and general factory machinery.

It is especially suitable for applications where engineers need to manually adjust AC voltage during equipment testing, commissioning, production or maintenance.

Technical Specifications

Why Choose Us

Shanghai Lepus Electrical Equipment Co., Ltd. specializes in transformers, voltage stabilizers, voltage regulators and variac transformers for global industrial customers.

One of our key advantages is our flexible OEM and ODM service. We can customize product parameters, input and output voltage, rated capacity, cabinet design, product appearance, nameplate, company logo, packaging and other configurations according to customer requirements.

Before shipment, every product undergoes strict inspection and electrical testing to help ensure stable performance and reliable operation.

We also provide technical support, installation guidance, spare-parts assistance and worldwide shipping services.

OEM & Customization Service

We support:

• Customized input and output voltage

• Customized rated capacity

• Customized cabinet and appearance

• Customized company logo and nameplate

• Customized electrical configuration

• Customized packaging

• OEM and ODM production

• Professional product photography and video service

Frequently Asked Questions

Q1: What is a Single Phase Variac Transformer?
A: It is an adjustable AC transformer that allows users to manually and continuously regulate output voltage within its specified range.

Q2: What is the standard input and output voltage?
A: The standard configuration is 220VAC input and 0–300VAC adjustable output. Other voltage ranges can be customized.

Q3: Can the rated capacity be customized?
A: Yes. We manufacture different capacities according to the customer's load and application requirements.

Q4: Is it suitable for motors and inductive loads?
A: Yes, but motor starting current and load characteristics should be considered when selecting the correct transformer capacity.

Q5: Can it be used with generators?
A: Yes. It can be used in generator testing, equipment commissioning and other applications requiring adjustable AC voltage.

Q6: Does it cause waveform distortion?
A: The transformer regulates voltage without adding significant waveform distortion under normal operating conditions.

Q7: How is the output voltage adjusted?
A: The operator manually rotates the control knob while monitoring the output voltage through the digital display.

Q8: Do you provide OEM and ODM services?
A: Yes. We support customized voltage, capacity, appearance, logo, nameplate, packaging and electrical configuration.

Q9: What is the MOQ and lead time?
A: The MOQ is 1 set. Standard products usually require approximately 3–10 working days, while customized or large-volume orders may require 20–30 days.

Q10: Do you provide technical and after-sales support?
A: Yes. We provide technical consultation, installation guidance, lifetime telephone support, spare-parts assistance and optional on-site engineering service.

Contact Us

Shanghai Lepus Electrical Equipment Co., Ltd.

TEL / MOBILE / WECHAT: +86 15926315252
WhatsApp: +86 18979230829
Email: daniel@shlepus.com