Cable fire protection judgment method and system for fire control linkage

Abstract

The invention provides a cable fire protection judgment method and system for fire control linkage. The cable fire protection judgment method comprises the following steps of acquiring a monitoring signal outputted by a fire control sensor in the coverage area of a cable, and judging whether a fire happens or not; acquiring and judging whether a status signal of a switch in the cable is a normallyclosed status signal or not, wherein the switch is used for on-off connection between the cable and a power grid; acquiring and judging whether the voltage and the current of the cable are 0 or not;and if the fire happens, the status signal of the switch is the normally closed status signal, and the voltage and the current are 0, outputting a firefighting equipment action allowing signal, and ifno fire happens, outputting a firefighting equipment action inhibiting signal. The cable fire protection judgment method and system for fire control linkage combine the multiple signals such as a fire signal, a normally closed status signal, the voltage and the current and perform logical judgment, so that under the condition that four conditions are met, the action protection signal, namely thefirefighting equipment action allowing signal is only outputted, the logical judgment is more accurate, and the false action prevention capacity is improved.

Description

technical field [0001] The invention relates to the field of electric fire protection, in particular to a method and system for judging cable fire protection for fire linkage. Background technique [0002] Since the insulation layer of the power cable is composed of various combustible substances, there is a possibility of explosion and fire, and once the cable catches fire, the fire will be fierce and spread rapidly, and a large amount of harmful gas will be generated during combustion. It is difficult to fight fires, and after burning out, the repair time is long and the loss is serious. Therefore, cable fire protection is a very important task. [0003] At present, the judgment logic of cable fire protection is relatively simple. Generally, only the alarm signal of the fire sensor and the switch signal of the transformer are used as the judgment logic of the fire protection action to determine the input signal of the fire protection action. However, because the alarm sig...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a method and system for judging cable fire protection for fire-fighting linkage, so as to solve the problem that the judgment logic of existing cable fire protection is relatively simple and easily leads to misoperation of fire-fighting equipment. technical problem

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