APPARATUS OF MONITORING ELECTRICAL FIRE FOR POWER DISTRIBUTION PANNELS

摘要

An early electrical fire sensing system for a high voltage panel, a low voltage panel, a motor control panel, a distribution board, or a power distribution panel comprises the first laser that emits the frequency beam absorbed by benzyl alcohol gas and the first detecting device which detects the first beam intensity; the second laser which emits the frequency beam absorbed by BHT gas and the second detecting device which detects the second laser beam intensity; and a main control unit which consists of a microprocessor. The main control unit gives a fire alarm event when the first laser beam intensity of the first detecting device is decreased more than a reference value, while a fire emergent alarm event when the second laser beam intensity of the second detecting device is decreased more than a reference value.

主权项

1. An early electrical fire sensing system for a high voltage panel, a low voltage panel, a motor control panel, a distribution board, or a power distribution panel comprising:
a frequency oscillator generating the first frequency beam absorbed by benzyl alcohol gas and the second frequency beam absorbed by BHT gas; a sealed tube including lasers, detecting devices, a frequency oscillator, 45° half mirrors, an X-axis polarizer, and a standard air environment; and a main control unit consisting of a microprocessor which gives alarm events, wherein the frequency oscillator alternatively generates the first frequency and the second frequency for driving of the laser; the laser beam that half transmitted by the 45° half mirror passes through a standard air environment inside the sealed tube and the X-axis polarizer and is detected by the detecting device; the laser beam that half reflected by the 45° half mirror passes through one or more optical fibers and one or more monitoring air environments, and is detected by the detecting device; and the main control unit gives a fire alarm event when the laser beam intensity difference between the first reflected laser beam that is passed through a monitoring air environment and the first transmitted laser beam that is passed through the standard air environment is more than a reference value, while a fire emergent alarm event when the laser beam intensity difference between the second reflected laser beam that is passed through a monitoring air environment and the second transmitted laser beam that is passed through the standard air environment is more than a reference value.