Points To Keep In Mind While Using Variac

Variac or variable autotransformer is prepared by exposing part of winding coils and creating the secondary connection through a sliding brush

. This provides a variable turn ratio and smooth and control of voltage as well. Autotransformer is equipped with automatic switchgear and taps to permit them to act as automatic voltage regulators. It is done to maintain a steady voltage in heavy load conditions.

The variac helps to multiply the incoming voltage to make it the level of desired voltage. But, if the incoming voltage varies so does the output from this device. It is typically used as profiling controller. if we talk in the technical language then we can write that auto transformer are used where stepping or stepping sown voltage is required for different kind of machines.

Variac are handy and less costly devices used to adjust the alternating current voltage for electric machine, devices and equipments. Suppose a performing musician have poor voltage of supply for playing his guitar then plugging the guitar into a variac can bring the desired solution. Before handling such electronic devices like HT AVR, variac etc. you must be aware of the points that will help you to know that how to use them. Below mention points are for the same reason, have a look over them:

Compute the variacs utmost power handling capacity. Multiply its amp rating by 84.8 and choose a lamp rated at small value than you achieved after multiplication. Ensure the variac is switched off and also check whether its dial is initialized at zero or not. Plug-in the lamps wire into this devices electric port.

Then switch on the variac by plugging in the wall outlet. If you want to increase the voltage turn the knob of it in the clockwise direction, you will observe that it is getting dimmer or brighter with the rotation of the knob. This is what you need to know to have an idea of how a variac is used.

But, dont try to use it on AC motor. Check and read the precautions carefully before operating and working with it. Different types of transformers are available depending on the use on it. It means separate variacs are used for household devices while totally different for industries and factories where the requirement of a particular voltage is strictly needed.

You can purchase these electronic devices such as transformers, Online UPS and others online too. There are many websites that avail this facility along with an easy mode of payment. Buy from a reputed manufacturer and compare the price with others also.

by: Jimmy Seikh

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