SURGE PROTECTIVE DEVICE AND SURGE PROTECTIVE SYSTEM
First Claim
1. A surge protective device comprising:
- a jack having an external line side terminal to which an external line configured with a communication line or a control line is connected, an equipment side terminal to which equipment to be protected is connected, a first connection terminal, a second connection terminal, and a juncture terminal connected to the first connection terminal; and
a plug having a third connection terminal detachably connected to the first connection terminal, a fourth connection terminal detachably connected to the second connection terminal, a protection circuit which discharges lightning surge intruding from the external line side terminal or the equipment side terminal through the second connection terminal and the fourth connection terminal to a ground side to protect the equipment to be protected, a degradation detecting unit which detects intrusion of the lighting surge and detects a degradation state of the protection circuit by comparing a history of the lightning surge with a reference value, and a display unit which displays a detection result of the degradation detecting unit;
wherein, when a plurality of the surge protective devices are installed together, a juncture plug which detachably connects between the adjacent juncture terminals in the adjacent surge protective devices is provided, andthe detection result of the degradation detecting unit is output through the third connection terminal, the first connection terminal, the juncture terminal and the juncture plug.
1 Assignment
0 Petitions
Accused Products
Abstract
A surge protective device (SPD) includes a jack and a plug detachably attached by insertion to the jack. Inside the plug, a protection circuit which protects equipment to be protected against intruding lightning surge, a degradation detecting unit which detects a degradation state of the protection circuit, a display unit which displays the detection result, or the like, are provided. When a plurality of SPDs are installed together, a juncture plug which detachably connects between juncture terminals within the adjacent SPDs is provided. The detection result of the degradation detecting unit within the plug is output to an outside through a third connection terminal within the plug, a first connection terminal and the juncture terminal within the jack and the juncture plug.
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Citations
16 Claims
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1. A surge protective device comprising:
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a jack having an external line side terminal to which an external line configured with a communication line or a control line is connected, an equipment side terminal to which equipment to be protected is connected, a first connection terminal, a second connection terminal, and a juncture terminal connected to the first connection terminal; and a plug having a third connection terminal detachably connected to the first connection terminal, a fourth connection terminal detachably connected to the second connection terminal, a protection circuit which discharges lightning surge intruding from the external line side terminal or the equipment side terminal through the second connection terminal and the fourth connection terminal to a ground side to protect the equipment to be protected, a degradation detecting unit which detects intrusion of the lighting surge and detects a degradation state of the protection circuit by comparing a history of the lightning surge with a reference value, and a display unit which displays a detection result of the degradation detecting unit; wherein, when a plurality of the surge protective devices are installed together, a juncture plug which detachably connects between the adjacent juncture terminals in the adjacent surge protective devices is provided, and the detection result of the degradation detecting unit is output through the third connection terminal, the first connection terminal, the juncture terminal and the juncture plug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification