Protective cover for a lightning arrester with a prior issue of upward leader.A protective cover for a dielectric rods with a device of the prior issue of upward leader, which includes a portion connected to the active device of the prior issue of upward leader to facilitate the triggering of an upward leader from the portion ta VAT, a driver of the descent to be terrified.And a dielectric portion through which the portion activates u00e9montada on the driver of decline. The active portion is separated from the driver of the decline by a space to air to form between them a space for cantelhamento, by means of which the lightning current passes from the portion activates the driver of decline.The protective cover is designed to be attached to the lightning rod to protect the space of sparking against degradation of dielectric properties for the environment, leaving the active portion of the lightning rod exposed to the environment.
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