| 摘要 |
FIELD: electricity. ^ SUBSTANCE: adjustable voltage transformer comprises the following: a primary winding connected to a source of power supply, a secondary winding electrically isolated from the primary winding, besides, the secondary winding is designed to reduce the primary voltage down to the secondary voltage and a multistep switch of transformer taps connected with the secondary winding, besides, the transforer tap switch divides the secondary voltage into the specified number of voltage steps. ^ EFFECT: even and less distorted adjustment of current supplied to heaters of electric resistance, supply of power supply to heaters of underground beds and their adjustment. ^ 20 cl, 4 dwg |
