FIELD: electricity.
SUBSTANCE: device comprises high-nonlinear varistors connected between protected object and earth, and also commutators that shunt some high-nonlinear varistors. At the same time some high-nonlinear varistors and commutators are combined in blocks with electric joints and insulating washers, providing, under working voltage, serial connection of all high-nonlinear varistors and shunting of some high-nonlinear varistors by commutators in overvoltage mode. At the same time all blocks are installed in a single column with non-shunted part of high-nonlinear varistors installed in insulation body.
EFFECT: increased reliability of operation and increased service life of device.
2 dwg
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