Wire break alarm

Abstract

The invention discloses a wire break alarm. The wire break alarm comprises a casing, wherein a solid-state relay is arranged in the casing and is connected with a power supply; a temperature regulatoris connected to the solid-state relay; an electric conductor is connected to the temperature regulator and is serially connected with a circuit breaker and a power supply switch; a gate circuit is connected to the electric conductor; an output circuit is connected to the gate circuit and is connected with the circuit breaker; a detection circuit is connected to the gate circuit and consists of avoltage and current switching circuit, a smoothing circuit and a relative circuit; the relative circuit is connected with the gate circuit; the voltage and current switching circuit is connected witha current detector; a power supply circuit is connected to the power supply switch; and a setting circuit is connected to the power supply circuit and is connected with the relative circuit. The wirebreak alarm disclosed by the invention is more convenient to use; and wire breakage of any one phase of three phases can be reliably detected.

Description

technical field [0001] The invention relates to the technical field of detection devices, in particular to a wire break alarm. Background technique [0002] Three-phase heating tubes are widely used in people's production and life. During the processing of three-phase heating tubes, it is necessary to detect whether there is a disconnection of the three-phase heating tubes to ensure product quality. [0003] Most of the existing disconnection alarms can only detect two of the three phases. When the disconnection occurs in another phase, it is difficult to detect it, which may cause errors in the detection results and affect product quality. Contents of the invention [0004] The purpose of the present invention is to provide a broken wire alarm to solve the problem that most of the prior art can only detect two phases of the three phases, and when the broken wire occurs in another phase, it is difficult to detect and difficult to detect It may cause problems such as error...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a broken wire alarm to solve the problem that most of the prior art can only detect two phases of the three phases, and when the broken wire occurs in another phase, it is difficult to detect and difficult to detect It may cause problems such as errors in the test results.

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