FIELD: electricity.
SUBSTANCE: present invention relates to electric power systems. The basic concept lies in connecting delay line (25) between switch (20) and the power output of the electrical power switching system, so that, arc drawing loads (40) do not affect switch (20) over the delay time provided by this line (25). This enables detection of arc drawing loads and active protection of the switch, as a rule, through switching off before arc drawing loads affect it. As an alternative, delay in the line can be sufficiently longer so that, during normal pulsed operation, the switch is open before load fault current flows through it.
EFFECT: protection of the switch from faults in the load.
41 cl, 15 dwg
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