STEP TAP CHANGER OF TRANSFORMER WINDINGS UNDER LOAD WITH ENERGY ACCUMULATOR Russian patent published in 2010 - IPC H01H19/12 H01H3/30 

FIELD: electricity.

SUBSTANCE: step changer comprises cylinder of dielectric, wall of which comprises fixed connected step contacts. Inside cylinder there is a rotary changing rod, actuated by drive crankshaft, which is mechanically connected to two energy-accumulating compression springs of energy accumulator. Compression springs rest with their one end against common fixed spring countersupport and are tightened at the beginning of changeover. Traction rod is arranged on drive crankshaft, around which there is a shock-absorbing pipe, where specified countersupport is fixed. One compression spring is arranged inside shock-absorbing pipe, and other compression spring is arranged outside shock-absorbing pipe and covers it.

EFFECT: increased service maintenance periods of step changer by increasing fatigue strength of energy accumulator, including compression springs.

2 cl, 2 dwg