Three-phase automatically transformers (variac transformers) with a range of output voltage control from 0 to 430 Volts with an LCD display.

The main difference between laboratory autotransformers and conventional ones is that the mobile contact in the winding allows changing the number of turns included in the circuit and thus makes it possible to set the voltage in a wide range, for example, in a single-phase network – from 0 to 300 V, in a three-phase – from 0 to 430 V. the change in The number of turns occurs smoothly, so it is possible to obtain the most accurate voltage values and a pure sine wave at the output. In addition, this device is lighter and more compact than analogues made according to the traditional scheme, and has a much greater efficiency (up to 98%). To control the operation of the control panel has a voltmeter and ventilation grilles in the body contribute to the natural cooling of the device and prevent overheating.

Application areas:
- in all cases where non-standard voltage is required;
- used in industries where temperature control is required;
- as an additional device for transistor recorders, machine tools;
- in scientific laboratories;
- on the productions involved in the design and adjustment of TV receivers and other household appliances;
- when testing fuses, regulation of relays, circuit breakers, current limiters, etc.;
- in the oil and other industries.