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A channel of a series-type magnetohydrodynamic generator comprises a central section with sectionalized electrodes, the ends of the central section adjoining respective transition sections including sectionalized electrodes. Adjacent the free end of each transition section is an end section made as

A channel of a series-type magnetohydrodynamic generator comprises a central section with sectionalized electrodes, the ends of the central section adjoining respective transition sections including sectionalized electrodes. Adjacent the free end of each transition section is an end section made as a continuous load electrode. There is a switching element between each pair of the electrodes of the transition sections and between the “outermost electrode of the transition section－load electrode”. Connected in parallel with the switching elements are relay and a respective type limit voltage switching elements. Sensitive elements of the same type are inserted between the outermost adjoining sectionalized electrodes of the central and the transition sections.

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A channel of a series-type magnetohydrodynamic generator comprising: a central section; a plurality of sectionalized electrodes included in said central section; two transition sections each adjoining respective ends of said central section; another plurality of sectionalized electrodes included in

A channel of a series-type magnetohydrodynamic generator comprising: a central section; a plurality of sectionalized electrodes included in said central section; two transition sections each adjoining respective ends of said central section; another plurality of sectionalized electrodes included in said transition sections; two end sections each adjoining other ends of respective transition sections, each of said end sections including a continuous load electrode; a plurality of switching elements, each being inserted between adjacent electrodes of said end and transition portions; a plurality of relay-type limit voltage sensitive elements, each being connected in parallel with a respective switching elements, sensitive elements of the same type being inserted respectively between outermost adjacent electrodes of said central and transition sections; actuating organs of said sensitive elements, the actuating organs of some of said sensitive elements, being connected in parallel with said switching elements between load electrodes and an outermost electrode of a respective transition section to control the making of said switching elements only, the actuating organs of some of said sensitive elements being inserted between outermost adjacent electrodes of said central and transition sections to control the breaking of said switching elements inserted between the nearest adjacent pair of said electrodes, and the actuating organs of remaining sensitive elements being connected in parallel with said electrodes of said transition sections to control the making of the switching elements to which they are connected in parallel and to control the breaking of switching elements inserted between the nearest adjacent pairs of said electrodes on the side of said load electrode.