Alarm circuit and device for cable protection
A technology for alarm circuit and cable protection, which is applied in the direction of alarms, instruments, etc., can solve the problem of damage to cables and loads, and achieve the effects of preventing damage to loads, simple circuit structure, and preventing high temperature from burning cables
Inactive Publication Date: 2018-12-25
姚德智
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[0004] The purpose of the present invention is to provide an alarm circuit and device for cable protection, which aims to solve the problem that the existing control technology for cable protection will cause the cable to generate heat or overcurrent when transmitting electric energy. problems that lead to damage to cables and loads
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[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0015] The above-mentioned alarm circuit and device for cable protection, after the alarm circuit performs voltage conversion on the voltage signal output by the power module, on the one hand, when it detects that the temperature of the cable exceeds the preset temperature value, it disconnects the The circuit where the load is connected; on the other hand, when the current of the cable is detected to exceed the preset current value, an alarm signal is issued. Therefore, through a simple circuit structure, the overtemperature and overcurrent of the cable can be detected, and the cable can be alarme...
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The invention belongs to the technical field of electronic circuits, and provides an alarm circuit and device for cable protection. After the alarm circuit changes the voltage of a voltage signal output from a power supply module, on the one hand, when the temperature of a cable is detected to exceed a preset temperature value, a loop connected with a load is disconnected, and on the other hand, when the current of the cable is detected to exceed a preset current value, an alarm signal is issued. Thus a simple circuit structure can be used for detecting over-temperature and over-current of thecable, and alarming and protecting for the cable; and occurrence of phenomenon of cable burning and load damaging at high temperature is effectively prevented, and the problem of load damaging existing in an existing control technology for cable protection due to heating of the cable or over-current and other reasons when transmitting the electric energy is solved.
Description
technical field [0001] The invention belongs to the technical field of electronic circuits, in particular to an alarm circuit and device for cable protection. Background technique [0002] At present, because the application of electrical equipment is more and more extensive, the protection of cables is becoming more and more important. However, when the cable transmits electric energy, the cable and the load are often damaged due to self-heating or overcurrent and other reasons. [0003] Therefore, the existing control technology for cable protection has the problem that the cable and the load will be damaged due to self-heating or overcurrent when the cable transmits electric energy. Contents of the invention [0004] The purpose of the present invention is to provide an alarm circuit and device for cable protection, which aims to solve the problem that the existing control technology for cable protection will cause the cable to generate heat or overcurrent when transmi...
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IPC IPC(8): G08B21/18
CPCG08B21/18G08B21/182
Inventor 姚德智
Owner 姚德智