Patent ID: 8995107
Filing Date: 2015-03-31
Classification: H01C

Abstract:
1. A modular lightning surge protection apparatus applied to a single-phase three-wire power system with a line, a neutral, and a ground, the modular lightning surge protection apparatus comprising: a substrate; a surge protection unit comprising: a first surge protection element having a first pin and a second pin; a second surge protection element having a first pin and a second pin; a third surge protection element having a first pin and a second pin, wherein the second pin of the first surge protection element is connected to the first pin of the second surge protection element and the first pin of the third surge protection element to form a wye connection, and the second pin of the third surge protection element is connected to the ground; a first temperature fuse having a first pin and a second pin, and the first pin of the first temperature fuse connected to the line; a second temperature fuse having a first pin and a second pin, and the first pin of the second temperature fuse connected to the neutral; a first jumper element electrically connected between the first pin of the first surge protection element and the second pin of the first temperature fuse on the substrate; a second jumper element electrically connected between the second pin of the second surge protection element and the second pin of the second temperature fuse on the substrate; a signal output main line connected to the first pin of the first temperature fuse to provide a main signal output terminal; a first signal output branch line connected between the first pin of the first surge protection element and the first jumper element to provide a first branch signal output terminal; a second signal output branch line connected between the second pin of the second surge protection element and the second jumper element to provide a second branch signal output terminal; a first indicating unit having a first light-emitting diode with an anode and a cathode and a first current-limiting resistor with a first terminal and a second terminal; wherein the cathode of the first light-emitting diode is connected in series to the first terminal of first current-limiting resistor; the anode of the first light-emitting diode is connected to the main signal output terminal, and the second terminal of the first current-limiting resistor is connected to the second branch signal output terminal so as to indicate that an external power source is normal or abnormal for supplying the modular lightning surge protection apparatus; and a second indicating unit having a second light-emitting diode with an anode and a cathode and a second current-limiting resistor with a first terminal and a second terminal; wherein the cathode of the second light-emitting diode is connected in series to the first terminal of the second current-limiting resistor; the anode of the second light-emitting diode is connected to the first branch signal output terminal, and the second terminal of the second current-limiting resistor is connected to the second branch signal output terminal so as to indicate that the modular lightning surge protection apparatus is available or unavailable for providing the lightning surge protection; wherein the surge protection unit, the first temperature fuse, and the second temperature fuse are electrically connected on the substrate to form a small-scale modular circuit integration structure.