Leakage detection circuit

Abstract

The embodiment of the invention discloses a leakage detection circuit which is connected with an electric device casing through a casing interface. The leakage detection circuit includes a bleeder circuit, a switching circuit and an alarm circuit, wherein the bleeder circuit is arranged between the casing interface and the ground and used for detecting leakage voltage generated by the electric device casing when the casing interface is connected with the electric device casing; the control terminal of the switching circuit is connected with the bleeder circuit, and the switching circuit is closed when the leakage voltage generated by the bleeder circuit reaches an alarm threshold value; and the alarm circuit is connected in series between the switching circuit and the anode of a power supply and used for generating alarm signals to alarm when the switching circuit is closed. The leakage detection circuit detects whether the electric device casing is charged by judging whether the bleeder circuit generates leakage voltage, and alarms when the electric device casing is charged, thereby being capable of timely reminding people to pay attention to check and clear troubles, particularly being capable of reminding maintenance personnel to pay attention to the safety during maintenance to avoid electric shock.

Description

technical field [0001] The invention relates to a detection circuit, in particular to a leakage detection circuit. Background technique [0002] After the general fixed installation lamps fail, maintenance personnel must repair them. However, because the maintenance personnel do not know what causes the failure of the lamp, nor whether the failure affects the grounding performance of the lamp, it is likely to pose a threat to the personal safety of the maintenance personnel during the inspection. When the failure of the lamp leads to the loss of its grounding performance, the shell of the lamp will be charged, and this leakage phenomenon is likely to cause the maintenance personnel to get an electric shock during maintenance. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a leakage detection circuit. It can quickly detect whether the electrical casing is charged, and ensure the safety of the...

AI Technical Summary

Problems solved by technology

However, because the maintenance personnel do not know what causes the failure of the lamp, nor whether the fault affects the grounding performance of the lamp, it is likely to pose a threat to the personal safety of the maintenance personnel duri

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