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An electric energy measurement method for a single-phase meter with live wire or neutral wire disconnected

A technology of electric energy measurement and single-phase meter, applied in the direction of measuring electrical variables, measuring devices, measuring current/voltage, etc., can solve problems such as current flow, and achieve the effect of accurate measurement

Active Publication Date: 2021-12-17
NINGBO JIANAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods make the watt-hour meter lose voltage, there is still current flowing on the live wire or the neutral wire.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described in detail below in combination with specific embodiments.

[0019] When the electric energy meter is powered on and working normally, the live wire current and the neutral wire current are in a balanced state, and the electric energy meter is equipped with a power supply circuit to provide power for the electric energy meter. After normal power failure, the electrolytic capacitor in the power supply circuit is discharged. , the energy meter enters a low power consumption state and is powered by the battery. In some economically underdeveloped countries, insufficient voltage often occurs, so it is necessary to consider this normal low-voltage situation when judging whether it is electricity theft.

[0020] In the present invention, a method for measuring electric energy in which the live wire or the neutral wire of a single-phase meter is dropped, a manganin shunt is provided on the live wire to sample the current of the li...

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PUM

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Abstract

The invention relates to a method for measuring electric energy in which the live wire or the neutral wire of a single-phase meter is dropped. By improving the metering method of the electric energy meter, the electricity stealing behavior in the normal power-on situation or the way of the live wire or the neutral wire being dropped is realized. Behavior, accurate metering can be achieved, and even in some low-voltage applications, accurate metering can also be achieved.

Description

technical field [0001] The invention relates to a method for continuous metering when the electric energy meter loses the live wire or the neutral wire. Background technique [0002] Under normal working conditions of the electric energy meter, the live wire current and the neutral wire current should be balanced, that is, the live wire current and the neutral wire current are the same. In some economically underdeveloped countries in Southeast Asia and Africa, electricity thieves steal electricity by grounding the neutral wire or connecting the live wire externally, and this method of stealing electricity is extremely harmful. The neutral wire grounding method is to make the current flow directly from the neutral wire to the ground instead of the electric energy meter, so that the voltage of the electric energy meter loses voltage. The method of stealing electricity by externally connecting the live wire is to prevent the current of the live wire from flowing into the elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/10G01R22/06G01R15/00G01R19/165
CPCG01R22/10G01R22/066G01R15/00G01R19/165
Inventor 章恩友蒋卫平刘照飞寿寅生贺东王岩李海江李家佳徐杰陆聪沛张静
Owner NINGBO JIANAN ELECTRONICS