Three-pole lightning arrestor integrated into a residential gateway with lightning impact detector

摘要

An electronic appliance powered by a power supply unit connected to a mains type electricity network, and for connection to a transmission line having two conductor elements and to a terminal in order to transfer data between the line and the terminal. The appliance has a front-end component connected to the line via an isolating transformer. Also, various additional components are connected to an electrical ground of the appliance. A discharge component is connected to the conductor elements of the line and becomes conductive in the event of a voltage surge due to a lightning strike. This eliminates the surge by establishing a flow of current from the line to electrical ground. A capacitive and/or resistive type divider component is interposed between the discharge component and electrical ground in order to co-operate with the power supply unit and/or one or more additional components to constitute a divider bridge.

主权项

1. An electronic appliance powered by a power supply unit connected to a mains type electricity network, and for connection to a transmission line having two conductor elements, and to a terminal in order to transfer data between the line and the terminal (9), the appliance comprising:
a front-end component connected to the line via an isolating transformer; various additional components connected to an electrical ground of the appliance; a discharge component such as a three-pole gas discharger connected to the conductor elements of the line and that becomes conductive in the event of a voltage surge due to the line being struck by lightning, thereby eliminating the surge by establishing a flow of current from the line to electrical ground so as to protect the components situated downstream of this protection, such as the transformer or the front-end component; and a capacitive and/or resistive type divider component interposed between the discharge component and electrical ground in order to co-operate with the power supply unit and/or one or more additional components to constitute a divider bridge, whereby the voltage imposed on the electrical ground of the appliance in the event of lightning is less than the surge to which the conductor elements (6, 7) of the line are subjected so as to provide protection also to the additional components.