An electric fire watching system to use a carrier wave of power line and phase detection of excessive electric current

摘要

The monitoring device is designed for installation on the inlet of the building to detect in advance a fire due to electrical to prevent by reliable information promptly notify the user an electrical fire consists of the following functions.; Obtain a ZCT (I) and voltage lead-out terminals and CT (C) the voltage, information of the current, the leakage current flowing into the load through provided on the outlet side (A), molded case circuit breaker is installed in the inlet antenna is a broadband electromagnetic waves generated at the time of spark been configured after the amplification by the input to the receiver (m) by irradiating the intermediate frequency of the carrier wave prepared by the primary computation operation substrate (e), control is input to a chip state of the substrate (e) in the power line to determine a short-circuit or not, also a and a telephone modem (I) that the key to transmit the message from the display (L) cell number, type, and according to the load environment in case of the relevant incident to input the current setting audio substrate (J) to be sent to a (nya) transmitting the result to the user of the mobile terminal and configured to store information in non-volatile memory chip.; And, separate from the building service entrance to the circuit breaker (a) when the power supplied to each load which leads to a short circuit from the micro discharge by the coating damage to the electrical distribution there is the spark occurs modulated received electromagnetic waves generated at the time of spark to the antenna was used as an interrupt signal from the CPU, this was compared to the over-current that occurs at the same time as the voltage-phase injection of a carrier wave on the power line after confirming the transient current is generated in the load first, if there is concern through the final check of fire electromagnetic switch (d ) cut off the power to and be configured to deliver to the user.