Variac Voltage

Variacs Home

Variac Transformer
Variac transformers are available in single and three phase and their distortion free output is ideal for sensitive electronic applications.

Types of Variacs
Click here to find out the different types of Variacs and what applications they are used for.
 

Applications for Variacs
Variacs transformers are used for many different applications but are ideal for electronic applications that are sensitive to distortion.

Choosing a Variacs
What information do you need to know before choosing a Variacs?  Let us help in choosing the right Variacs for your applications.

Variac Variable
Variac Transformers are sometime called Variable Transformers because they are AC voltage controls that provide a variable AC Voltage.

Amp Variac
Variacs range in size from 120V to 600VAC single and three phase and fractional to 700 Amps.

Variac Voltage

Variac Voltage on the average can increased voltage by 15% above the applied input voltage.  Variacs wiring configuration yields a higher voltage out than the input voltage.  In some cases input voltage is more than 15% lower than the maximum turns, which provides a greater step-up output voltage. The following is a good example of this:

• 120 volts to 280 volts

•  480 volt transformer can be configured to 560 volts from a 120 volt input.   

Variacs Voltage - How does a Variac transformer works

A Variac is a a form of an auto transformer but by exposing part of the winding coils and making the secondary connection through a sliding brush, an continuously variable turn ratio can be obtain, which allows very smooth control of voltage. Variacs applications include controlling voltage, current, power, heat, speed, light, and are used in many industrial and laboratory applications.

Variacs are transformer offering alternating, adjustable current  but only the output voltage is adjustable.  Variac Voltage is higher on output rather than input voltage.  Variacs voltage are divided into two parts by the impedance between the inputs. The output voltage is determined by the divided impedance connected to the output.

Because Variacs operate on inductance to divide their impedance instead of resistance (most transformers work by resistance) their are highly efficiency, and have very little loss of power during heating.  The Varaic voltage consumes almost all of it power and are 98% efficient.

If you need more answers to how variac voltage works or choosing a variacs call TEMCo.  Their highly skilled staff will assist you in answering any of your questions, and help choose the right variac for your application.  TEMCo has been a leader in the power source industry for over 40 years and offers transformers, motors, generators and phase converters.  All of their products are the highest quality and back with some of the best warranties in the business.  They also guarantee the lowest prices, and with their large inventory can usually ship within 24 hours.

CALL TEMCo for all your transformers needs!!
1-510-490-2187 or 1-800-613-2290

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Variac Voltage

How  Variacs are Construction
Variacs use a toroidal core, wound with one continuous strip of suitable steel.
 

3 phase Variac
Resources on 3 phase and how a  3 phase Variac works.

Variac Voltage
Variacs are typically used to step up voltage 15 percent or more. Variacs are the most versatile and reliable voltage controls available.  

Finding a Variac Manufacturer
Provides guidelines on choosing a  Variac manufacturer and what to look for when purchasing a Variac Transformer

TEMCo's team of experienced Variac specialists are standing by to assist you!

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