The paper will present the results of the experiment in which the liner implosion was realized by a pressure pulse shaped by a magnetic opening switch. The current of the high-current explosive generator flows through the ring element of the magnetic opening switch during the time of 430 microseconds till it rises to 10 MA. The diameter of the copper ring element was 100 mm, length along the axis was 15 mm, and its thickness was 1.2 mm. The ring element was connected to the current-conducting electrodes by the bridges only 0.2 mm thick. Under the effect of magnetic pressure from the flowing ultra-high current the ring element expands in the radial direction. Thin bridges 0.2 mm thick are easily cut in the beginning of the element expansion, and then the ring element is only in sliding contact with the electrodes. Having run the distance of 14 mm, the ring element slides off the current-conducting electrodes. Separation of the ring element happened 30 s prior to the explosive high-current generator operation completion and prior to reaching the maximum current in it. At the moment of separation the rate of the ring element radial expansion was 1,5 mm/microsecond. A volumetric arc appears in the gap between the ring element and the current-conducting electrodes. Under the effect of magnetic pressure of roughly 10(exp 9) Pa the magnetized plasma spreads into a toroidal cavity of the coaxial above the imploding cylindrical liner.