Power distribution bus joint heating monitoring sensor

Abstract

The invention provides a power distribution bus joint heating monitoring sensor which comprises a shell, a panel, an LED array, a punched hole, a buzzer, a transmission shaft, a plane support, a coil, a waist ring, a framework, a second circuit board, a buzzing circuit, a display circuit, an iron core, a third circuit board, an inductance measuring circuit, a carrier circuit and an empty box. The LED array and the display circuit form a temperature prompting mechanism, and the buzzer and the buzzing circuit form a temperature alarming mechanism. The coil, the iron core and the empty box form a temperature sensing mechanism, the iron core capable of moving up and down is embedded in the coil, the coil and the iron core form a variable inductor, the third circuit board is provided with the inductance measuring circuit, and when the empty box expands when heated or contracts when cooled, through transmission of the transmission shaft, the part of the iron core inserted into the coil is increased or decreased, the value of the variable inductance is increased or decreased accordingly, the value of the variable inductance is in direct proportion to the temperature value, and the value of the variable inductance can be converted into the temperature value by measuring the value of the variable inductance.

Description

technical field [0001] The invention relates to a temperature sensor for detecting a power distribution bus, in particular to a heat monitoring sensor for a power distribution bus joint, which belongs to the technical field of electric power monitoring. Background technique [0002] The power distribution busbar is the basic component of a power transformer, power distribution room or power distribution room. For a small power Industrial and mining enterprises with electric furnaces, such as mining shafts, gravel yards, rolling mills, steel mills, brick and tile factories, and seaport terminals, have high energy consumption and large power currents. Some electrical appliances that work under AC 380 volts often use electricity The current intensity of the low-voltage power distribution busbar secondary to the transformer exceeds 100 amperes, and some reach hundreds of amperes. Under the condition of such a large current, the heat generation of the power distribution busbar jo...

AI Technical Summary

Problems solved by technology

[0002] The power distribution busbar is the basic component of a power transformer, power distribution room or power distribution room. For a small power Industrial and mining enterprises with electric furnaces, such as mining shafts, gravel yards, rolling mills, steel mills, brick and tile factories, and seaport terminals, have high energy consumption and large power currents. Some electrical appliances that work under AC 380 volts often use electricity The current intensity of the low-voltage power distribution busbar secondary to the transformer exceeds 100 amperes, and some reach hundreds of amperes. Under the condition of such a large current, the heat generation of the power distribution busbar joints cannot be ignored, and regular inspections are required. The current method is first to rely on manual visual inspection, mainly to check whether the three-phase bus joints painted with red, yellow and green three-color paint phase marks are discolored, burnt or smoked; the second is to conduct regular inspections through hand-held infrared thermometers , the disadvantage of the former is that the accuracy of visual inspection is very low, and it is impossible to know the specific temperature at the joint. The defect of the latter is that the labor intensity is relatively high, and the staff need to walk back and forth in the power distribution room regularly

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