What can I use a Variac for?
Ten Uses for an Autotransformer, or Variac
- Testing a repaired electronic device.
- Powering up an old radio or amplifier.
- Roasting coffee beans or nuts.
- Adjusting the temperature of a resistance-type heater.
- Hot-wire cutting of Styrofoam.
- Dimming incandescent lighting.
What is a voltage Variac?
Variacs provide a voltage-adjustable source of alternating current (AC) electricity. Usually plugged into a wall outlet (120 volts AC at 60 Hertz in the USA), they have a knob-controlled output that can range from 0 volts AC (VAC) to about 140VAC, depending on how the winding is connected (see below).
What is a Powerstat?
POWERSTAT® Variable Transformers They take in utility line voltage and provide continuously adjustable output voltage. Rugged, and designed for heavy duty use, POWERSTAT® Variable Voltage Transformers provide excellent power regulation with negligible variation in output voltage from no-load to full-load current.
What type of transformer is the Variac?
variable voltage transformers
“Variac” is the generic name for variable autotransformers. Variacs are arguably the most popular type of variable voltage transformers. They are AC power supplies that are cheaper, smaller, and a lot more portable than dual-winding transformers.
Why do I need a variac?
A variac is an excellent tool for safely powering up an old radio or amplifier that has not been used for an extended period of time. Using this low-priced piece of equipment could save you time and money as well as enable you to bring that old piece of equipment back to life with very little effort.
Can a variac be used to control motor speed?
It is more suitable for dimming lights and controlling heaters than it is for controlling motor speed. It would work for controlling a universal motor and to a very limited extent, some types of single-phase induction motors driving a fan or centrifugal pump.
How do you use a variac on a guitar amp?
Connect the power cord for your amp to the output of a variac. Set the variac for normal output and power up your amp. Let it warm up at normal voltage for 20 to 30 minutes. Then begin playing your amp at a moderate volume while SLOWLY turning down the output voltage of the variac.
What is a Powerstat variable transformer?
POWERSTAT® Variable Transformers. Www Page 2 POWERSTAT Variable Transformer is a continuously adjustable voltage autotransformer having a movable brush-tap riding on a commutator. Rotation of the brush-tap by either manual or motor-driven means delivers any output voltage in the range of zero to or above line voltage.
What does a variac transformer do?
Variac® transformers are Variable AC Power Supplies that provide adjustable AC voltage. Their distortion free output is ideal for sensitive electronic applications, testing devices for agency approval, and numerous other applications where a variable AC voltage is required.
What is the difference between the Staco 1010B and the 1020B?
STACO’s 1010B variable transformer coil operates on 120 volts and is rated for constant current of 10 amperes. The 1020B variable transformer coil operates on 120 or 240 volts and has a constant current rating of up to 3.5 amperes.
What is the difference between a 1210b and 1220b variable transformer?
Staco 1210B variable transformer coil operates on 120 volts and is rated for constant current of 12 amperes. The 1220B variable transformer coil operates on 240 volts and has a constant current rating of up to 5 amperes.
What is the voltage of a 1020B variable transformer?
The 1020B variable transformer coil operates on 120 or 240 volts and has a constant current rating of up to 3.5 amperes. Both variable transformer types include coil tapping arrangements allow for 0 to input line voltage or 17% above line voltage.