SURGE PROTECTIVE SYSTEM

摘要

A surge protective system has a plinth for wiring and is connected between a plurality of line side wires and a ground wire. A plurality of surge protective devices (SPDs) and one surge detector are disposed in parallel and detachably fitted into and attached to the plinth. The plinth has a wiring metal fitting for connecting the plurality of SPDs and the one surge detector. When a lightning surge current enters into the surge protective system from the line side wires, the lightning surge current flows to the surge detector through the SPDs, a 1st plinth contact part in the wiring metal fitting, a connection part and a 2nd plinth contact part. The lightning surge current flowing to the surge detector is discharged to the ground through the ground wire.

主权项

1. A surge protective system comprising:
a plinth for wiring; a plurality of surge protective devices disposed in parallel and detachably fitted into and attached to the plinth; and a surge detector disposed in parallel with respect to the surge protective devices and detachably fitted into and attached to the plinth, wherein the plinth comprises: a base in substantially box-like shape having an opening at an upper part; a cover comprising a base part covering the upper part of the base and a pair of 1st side wall part and a 2nd side wall part extending upward from both side faces of the base part; a plurality of 1st plinth terminal parts stored in the base and the cover, a plurality of line side wires inserted from an outer face of the 1st side wall part being respectively connected to the 1st plinth terminal parts; a 2nd plinth terminal part stored in the base and the cover, a ground wire inserted from an outer face of the 2nd side wall part being connected to the 2nd plinth terminal part; and a wiring metal fitting stored in the base and comprising a 1st plinth contact part, a 2nd plinth contact part, and a connection part connecting the 1st plinth contact part and the 2nd plinth contact part, each of the surge protective devices comprises: a 1st case in substantially box-like shape, detachably fitted and attached between the 1st side wall part and the 2nd side wall part; and a lightning protection circuit stored in the 1st case and discharging a lightning surge current entering from a side of each of the 1st plinth terminal parts to a side of the 1st plinth contact part, and the surge detector comprises: a 2nd case having substantially the same shape as the 1st case and detachably fitted and attached between the 1st side wall part and the 2nd side wall part; a detecting unit stored in the 2nd case, discharging the lightning surge current entering from a side of the 2nd plinth contact part to a side of the 2nd plinth terminal part and detecting a current value of the lightning surge current to obtain a lightning surge current detection result; and a display unit displaying the lightning surge current detection result so as to be able to be viewed from outside.