Applications for Variacs

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.

Applications for Variacs

Before discussing the different applications for Variacs lets give a brief description of how a Variacs work.  Variac transformers are layers of windings of wire on a toroidal core of laminated silicon steel.  How a variac creates variable output voltage is by moving a conductive slider along the windings.  A variac uses inductance and not resistance to reduce voltage. This is the reason you can have higher output voltage than the primary voltage on a variac.

Applications for Variacs

For many companies and individuals, the Variac is a indispensable workshop tool.  They are used to increase the voltage slowly on newly built or repaired amplifier to see if any anomalies occur that can cause damage. A Variac combined with a  normal transformer, bridge and filter caps  can create any  voltage, and it can be varied from zero to the maximum.

Other applications for Variacs are to test equipment voltage range that may be expected in the field.  In remote areas the voltage of 120V can vary widely.  Voltage can be varied by the use of a Variac to non-temperature-controlled soldering irons, and brush motors that are used in power tools, vacuum cleaners and etc.  Use of a Variac in a induction motors is not recommended, because it is easy to burn out the motor or the Variac if you don't know what you are doing.

Servo-motors is another common application for variacs, to provide a regulated AC supply.  If the main voltage change, the motor resets the variac to restore the preset voltage.  Remember Variacs are good for slowly varying voltage, but they cannot react quickly if there is a sudden change or spike.  Variacs are also used in stage lighting and dimmers and can be controlled remotely by using a servo motor. The variacs are very efficient,  quiet and generate zero harmonics or filament "singing" unlike TRIAC dimmers. The dimming range can be from zero to maximum, with no glitches in light output as the voltage is changed. 

Variacs are used in many industries that use process control systems, such as a hot-wire plastic form cutter.  Variacs applications are used for motor speed control, heaters, and anywhere else that require reliability, high efficiency and low maintenance variable AC supply is needed.

Other applications for Variacs:

Quality control testing, electronic equipment life tests and equipment burn-in.

Electronic service departments for checking equipment at low and high operating voltages.

Engineering departments to check new designs an assure products operate with input power variations.

Industrial and Engineering high current generator control

Industrial motor speed control

 As you can see  Variacs have many applications, and they are an efficient way to  have variable voltage.  For more information or to purchase a Variac call TEMCo and they can assist you in choosing the best Variac transformer.  TEMCo not only provides only quality Variac, but they stand behind all their products.  With their top-notch engineering staff, you can be assure you are getting the right transformer for your applications.  Call TEMCo today and find out what true customer service is all about.

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

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Applications for Variacs

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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