Insulated detection and intelligent safety protection device of electric equipment

Abstract

The invention relates to a detection and protection device, in particular to an insulated detection and intelligent safety protection device of electric equipment, which is used as an additional protection device of a tramegger. The insulated detection and intelligent safety protection device comprises a single-chip microprocessor, a control circuit, a converting circuit, a high-voltage monitoring module, an equipment electrification monitoring module, an insulated coarse measuring module, an AD converter, an indicating circuit and an alarm, wherein the single-chip microprocessor is electrically connected with the control circuit, the indicating circuit and the alarm; the control circuit is electrically connected with the converting circuit; the converting circuit is respectively and electrically connected with the high-voltage monitoring module, the equipment electrification monitoring module and the insulated coarse measuring module; the high-voltage monitoring module, the equipment electrification monitoring module and the insulated coarse measuring module are respectively connected with the AD converter; and the AD converter is connected with the single-chip microprocessor. The insulated detection and intelligent safety protection device indicates the electrification and insulation situations of measured equipment for operators so as to prevent the measured equipment from being broken down by high voltage and prevent the tramegger from being damaged by an equipment power supply.

Description

technical field [0001] The invention relates to a detection and protection device, in particular to an electrical equipment insulation detection intelligent safety protection device as an additional protection device for a megger. Background technique [0002] Some electrical equipment has been in a humid environment for a long time. Therefore, insulation testing must be carried out before the daily inspection and maintenance of this electrical equipment at all levels. Insulation testing must strictly prohibit two problems: [0003] 1. It is strictly forbidden to carry out insulation testing on the equipment [0004] If the device under test has voltage, the voltage will be applied to the megohmmeter through the measuring circuit, which will cause damage to the megohmmeter, and the higher voltage may even cause personal injury; or the high voltage output by the megohmmeter will break down the circuit of the device under test or Power supply, so that some circuits burn out, ...

AI Technical Summary

Problems solved by technology

[0006] There are two reasons why the insulation of the tested equipment is very low: one is that the insulation of the equipment itself is reduced, the resistance is very low or the equipment is short-circuited; the other is that the measurement position is connected incorrectly

Regardless of the above reasons, if the insulation is very low or even zero and then the insulation measurement is performed, the high output voltage of the megohmmeter will break down the circuit components, causing circuit damage and further expanding the equipment failure.

[0007] In the traditional process of using a megohmmeter for insulation measurement, the operator can easily ignore the above precautions, resulting in bad consequences. Therefore, an additional protection device is needed to indicate the electrification and insulation conditions of the measured equipment for the operator, so as to avoid being The measuring equipment is broken down by high voltage, and the megohmmeter is prevented from being damaged by the equipment power supply

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