SURGE PROTECTION DEVICE FOR MULTI-PROTECTION MODE COMMUNICATIONS

摘要

The present invention relates to a surge protection device for multi-protection mode communications, comprising: an input line into which a voltage is introduced; an output line connected to an external line; a surge discharge part provided with a ground terminal; a surge protection circuit part provided between the input line and the output line and having at least two or more surge protection circuits provided in parallel and discharging the introduced voltage to the ground terminal if the introduced voltage is a surge voltage; circuit conversion parts for selectively connecting the input line and the output line to any one of the surge protection circuits; a condition measuring part for measuring an input voltage introduced into an input terminal of the input line and a second discharge voltage from the surge protection circuit to the ground terminal and comparing each of the input voltage and the second discharge voltage with preset reference voltages; and a control circuit part for detecting abnormality of the connected surge protection circuit by using the comparison result of the input voltage and the comparison result of the second discharge voltage and converting the connected surge protection circuit into another one of the connected surge protection circuits through the circuit conversion parts if the abnormality of the connected surge protection circuit is detected. By the surge protection device for multi-protection mode communications, the damage to the surge protection circuits can be detected using the input surge voltage and no voltage is required to be additionally applied for detecting the damage to the surge protection circuits.

主权项

1. A surge protection device for multi-protection mode communications, comprising:
an input line into which a voltage is introduced; an output line connected to an external line; a surge discharge part provided with a ground terminal; a surge protection circuit part provided between the input line and the output line and having at least two or more surge protection circuits which are provided in parallel and discharge the introduced voltage to the ground terminal if the introduced voltage is a surge voltage; circuit conversion parts for selectively connecting the input line and the output line to any one of the surge protection circuits; a condition measuring part for measuring an input voltage introduced into an input terminal of the input line and a second discharge voltage from the surge protection circuit to the ground terminal and comparing each of the input voltage and the second discharge voltage with preset reference voltages; and a control circuit part for detecting abnormality of the connected surge protection circuit by using the comparison result of the input voltage and the comparison result of the second discharge voltage and converting the connection of the connected surge protection circuit into another one of the surge protection circuits through the circuit conversion parts if the abnormality of the connected surge protection circuit is detected.