VEVOR 2000VA Variable Voltage Transformer (TDGC2-2000VA): features and specs

The VEVOR TDGC2-2000VA is an auto variable voltage transformer, often called a variac. It takes 110V AC mains input and gives an adjustable output between 0 and 130V, so you can raise or lower the voltage reaching a device. People use these units for bench work, for testing equipment, and for controlling things such as heater output, lamp brightness or motor speed, where the device suits it.

What a variable transformer does

A variable transformer has a single winding and a movable contact turned by a knob. Turning the knob changes the output voltage smoothly, rather than in fixed steps. VEVOR describes it as a way to control brightness, temperature, speed and more. Whether a specific device tolerates a lowered voltage varies: some resistive loads such as incandescent lamps and heating elements handle it well, while other electronics, especially those with switching power supplies, may not. Check the device's manual before connecting it.

The key specifications

VEVOR lists:

• Power: 2000VA
• Input: AC 110V, 60Hz
• Maximum output current: 15.3A
• Output range: 0-130V

VA stands for volt-amperes, the apparent power the unit can handle. For resistive loads it is roughly the same as watts, but for loads such as motors the real figure differs. VEVOR recommends choosing a transformer with a capacity at least 25% higher than the total power of the devices you connect, which leaves headroom and avoids running it at its limit. Also remember the current limit: at lower output voltage, the current available is still capped at 15.3A.

Dial and controls

An analog dial shows the present output voltage, and a top-mounted knob adjusts it. The metal scale plate has clear markings, so you can set a voltage quickly. An analog meter is a good guide, but if the precise voltage matters, confirm it with a separate meter.

Protections

VEVOR says the unit includes fuses (four spare fuses come with it), a thermal control switch and a resettable overload protector. The case is thickened metal, with ventilation holes for heat dissipation. Keep the vents clear. As the manual will describe, use the unit within its listed limits, and have any wiring done to local electrical codes.

Size and weight

It measures about 8.7 x 6.7 x 7.7 inches (roughly 22 x 17 x 20 cm) and weighs 16 lb (about 7.3 kg), which is heavy for its size because of the copper winding and core.

Who it suits

It suits hobbyists, workshops, labs and offices that need adjustable AC voltage for testing or controlling equipment. It's an unsuitable choice for anything that needs regulated, stable voltage output at a fixed value, since a variable transformer follows the input rather than regulating it.

What to check before you buy

• Your mains supply: the unit is rated for 110V, 60Hz input.
• Load size: add up the connected devices and keep within the 2000VA capacity plus the recommended margin.
• Device suitability: check that what you plan to power is safe to run at reduced or raised voltage.
• Isolation: a variable transformer typically doesn't isolate the output from the mains, so follow the manual's guidance on handling.
• Space and ventilation: leave room around the vents.

The short version

• A 2000VA variable transformer with 110V input and a 0-130V output.
• Maximum output current of 15.3A.
• Analog voltage dial, top knob, fuses, thermal switch and resettable overload protector.
• Four spare fuses included; metal case weighing about 16 lb.

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