| 摘要 |
A circuit for connecting to an alternating current electric network having at least one phase a high-power electric heating device, such as a sauna heater, provided with a plurality of electric heating elements. Each phase of the network is evenly divided into a number of separate part leads such that the total number of part leads are arranged in two equal series. A first switch is arranged to simultaneously open and close all of the part leads of both series. A second multipolar switch controlled by a thermostat is adapted to open at least one of the separate part leads of one of the series. Each heating element is connected in circuit with one part lead from each series of part leads. The network may be three phase with the heating elements being delta-connected.
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