Overvoltage Protective device on telephone lines and / or Data, suitable for Installations with Earthing of poor quality, and Method for Protecting a telephone line and / or Data.

摘要

A protective device (10) Lines (12) transmitted by telephone and / or Data signals to a DC Voltage by default, 48 Volt.A bistable Relay (11) inserted in the pair of output Lines presents a normal closed (room) connected to the facility to protect and a normal Open outlet (SALB), a Rectifier (D3, D4, D7, D8) in each of these RELAY OUTPUTS configured with the opposite Polarity to the Rectifier The other end of the relay, a switching Circuit (19) forming a first series Circuit (R1,.R2, R3, C1, C2) with the Rectifier output of the normally closed Relay, with the first series Circuit (15) connected to the Coil of the relay energizarla way in case of overvoltage of this line and said Relay Switch to open (salb1 normal output, salb2)And a reclosing Circuit (21) that forms a Second Series with the Rectifier Circuit of the output Relay normal Open,This second series circuit is also connected to the Coil of the Relay of the relay to switch its output normal closed to stop the surge line and the return Line Voltage to the rated dc Voltage default.