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Your cart is empty.4.5 out of 5 stars
- #32,570 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
- #16 in Power Transformers
Product Description
There are a lot of common uses and practical applications for variacs. As we mentioned earlier, they’re more portable and more cost-effective than regular AC power supplies, which pretty much makes them a top pick for short-term projects and casual hobbies. variable autotransformercan be used to gradually revive previously dormant electronic equipment. They can also be used to regulate servo motors and control the temperature of ovens and heaters.
Voltage adjustment, when used with thermostatic control, provides more uniform heating.
You can also use variacs to simulate various voltage and line conditions for experiments, or power electrical equipment designed for voltage that isn’t the typical 120V or 240V supplied domestically.
Here are some other applications:
- Regulating voltage
- Controlling specified input voltage to rectifier elements to generate variable DC voltages from an AC source
- Operating electrical equipment—typically motors—at the correct or optimal voltage even with subnormal or higher-than-normal supply
- Varying step-transformer output voltage by control of input voltage Starting synchronous or induction motors in order to provide 50%-60% of the total voltage to the motor stator during start-up.
- Correcting voltage in subnormal or over-voltage supplies on 1-phase, 2-phase, or 3-phase circuits
- Compensating for voltage drops by giving small boosts to the distribution of a cable Controlling AC motors and DC motors operation rectified AC circuits Powering fans and other motors with low starting torque
- Controlling the brightness/
- Extending lamp life by operating it below rated voltage
- Calibrating electrical equipment and controls
- Compensating for appreciable voltage drops at the end of lines where distances run too long
Atul Sancheti
Reviewed in Canada on February 14, 2025
I’m really impressed with this variable voltage regulator! It’s exactly what I needed for my projects that require precise voltage control. The setup was straightforward, and the unit delivers consistent, stable voltage across a wide range. It handles various loads effortlessly and allows me to fine-tune the voltage to exactly what I need, which has been incredibly useful for my electronics work.The build quality feels solid, and the adjustable knobs are smooth and responsive, giving me full control over the output. Whether I’m powering sensitive devices or larger systems, this regulator keeps things running efficiently and safely. The temperature and over-voltage protections give me added peace of mind when working with different setups.If you're looking for a dependable, versatile voltage regulator that provides precise control and top-tier performance, this is definitely the one to get. I highly recommend it!
B Wallace
Reviewed in the United States on September 16, 2024
I ordered 3 of these in total. The first one came and worked for 3 or 4 days then just stopped. Fuse was fine but it died. This is on a dedicated 30 amp circuit used to run a 10a shop fan when my RV isn't here. I ordered 2 more to be safe. First one instantly blew 2 fuses then a puff of smoke with zero load. The third one is working but I have ZERO confidence in these with a 66.6% failure rate. I wish the best of luck if you buy one but this is just pathetic.
Breakerbroke23
Reviewed in the United States on November 18, 2024
Works well with zero problems.
andrew
Reviewed in the United States on April 17, 2024
Feels well built. Arrived packaged very well in foam. Worked perfectly for troubleshooting a power section on a tube amp.
JRO
Reviewed in the United States on September 1, 2023
Picked up this unit to control the speed of a ducking fan. While the speed control options from the manufacture of the fan introduce a hum to it, this one does not. Complete control of the fan speed by turning a dial with no hum occurring from the fan.Note: While the product description states the item weight for this is 0.634 ounces, it weighs in at 7.5 lbs. Plan accordingly if your mounting it somewhere other than on a table.
Ulises
Reviewed in Mexico on December 13, 2023
Funciona muy bien lo recomiendo
Brian Adams
Reviewed in the United States on August 26, 2022
I'm using the Beleeb 20 amp variable autotransformer to adjust my home's voltage for use with 100V Japanese electronics (Denon 100W amp and CD player.) House voltage at plug measures 120.0V, and with variac dial set to "90"(as per picture above,) the built-in voltmeter needle lies directly above the first "1" of the "110" marking (as per second picture above.) At such setting, Klein multimeter measures 99.9V out of both plugs on the variac. I would advise you to measure your home's actual voltage output at plugs, and confirm variable autotransformer settings with voltage output measured at each of its plugs. It seems to work as advertised, has a sturdy build, good tight feel to its knob, and, best of all, I do not have any new noise picked up by my stereo equipment downstream from the Beleeb unit.
Jtwhitefish
Reviewed in the United States on February 19, 2022
As other have shown, my unit seems to work fine but had significant denting around the actuator knob on the top of the unit. I'm not claiming a refund, because it seems to still work ok, but it still seems indicative of a general lack of QC at the factory or packaging facility. This thing is heavy, and maybe they just need to improve the packaging process? If I have problems I'll update but works fine for now.
Bud
Reviewed in the United States on February 7, 2020
So I have a 6" Tjernland inline duct fan I was wanting to slow down. I had a cheap $20 speed controller I was using but it made the fan hum pretty bad and wasn't linear for control. Now with this thing, ZERO hum, at any speed and total linear control. I cannot speak for the voltage meter on the front, because that doesn't really matter for what I'm doing. It's well worth it over the cheap units. It is big and kinda heavy, so expect that..
F. Patton
Reviewed in the United States on February 27, 2019
The unit is sturdily built, with smooth adjustment, nice quality switch and outlet, and plenty of capacity. Great bang for the buck.Note that the voltages printed on the top assume a 110V input. In my house, it's closer to 126V, so setting the knob to 110 gives you 126V! Bottom line: don't count on the label. The meter on the front is pretty close, but it only lists a couple of specific voltages, so I'd recommend using a meter to verify what you're getting.My solution, as the picture shows, was to use a voltmeter to adjust the output to specific values that I'd be needing, then print a label for those values. It works great and is very repeatable.
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