Unbalanced current detection device

A technology for detecting devices and balancing currents, applied in measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve the problems of not setting up power current detection circuits, economic losses of power supply units, and failure of electric meters to judge, display, and alarm in time. Handling and other issues

Inactive Publication Date: 2010-06-23
季小明
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  • Abstract
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Problems solved by technology

[0004] At present, the general-purpose ammeter does not set the detection circuit of whether all the power and current flow through the ammeter. When the user steals electricity by adding auxiliary lines, the ammeter cannot judge, display, alarm and process in time.
Serious economic losses have been caused to the power supply unit

Method used

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Embodiment Construction

[0015] The working principle of the unbalanced current detection device to prevent electricity theft on the ammeter will be described below in conjunction with the accompanying drawings.

[0016] 1. The composition of the circuit: (see the attached picture) The anti-stealing device of the ammeter unbalanced current detection device consists of: balance resistor R1 (2), unbalanced current detection circuit (1), signal conversion amplifier circuit (4), switch circuit ( 5), working state display circuit (6), alarm working module (7), power signal compensation module (8), power circuit disconnector (9), local calibration circuit button (10), load resistance (11) and corresponding The supporting circuit and line composition.

[0017] 2. Working principle: the present invention is connected in series at the front end or back end of the general electric meter, and detects whether the load current of the user all flows through the power current detection circuit of the electric meter....

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Abstract

The invention provides a power current detection device which is used for a power stealing prevention function of an ordinary electric meter. The device is installed in the ordinary electric meter, and an unbalanced current detection device is connected in series to an electric meter input end (showing in an attached figure) used for detecting whether power currents flowing through a phase line and a zero line of the electric meter are balanced or not. When a user steals power by adding an auxiliary line except using the electric meter, because a part of the currents do not flow through the electric meter, an electric meter power stealing prevention device, i.e. the unbalanced current detection device discovers that the currents flowing through the phase line and the zero line have unbalanced currents in time, a detection circuit outputs a way of control signals to a switch circuit, starts a corresponding acoustic-optic alarm circuit and a corresponding power signal compensation circuit in time and cuts off a power output circuit, thereby suspending the power stealing action of the user, sending alarm signals and notifying a relative maintenance management person to maintain the electric meter with a fault.

Description

technical field [0001] The invention relates to an unbalanced current detection technology, which is used to detect whether the power current flowing through the phase zero and second wires of the electric meter is balanced, and prevents users from stealing electricity by adding auxiliary lines and other technical means. Background technique [0002] The electric meter is a meter used to record electric power, and the user pays the electricity fee to the power supply party according to the data recorded by the electric meter. In order to achieve the purpose of paying less or not paying electricity bills, some unscrupulous users use various illegal technical means to reduce or stop the power current passing through the meter, reduce the power reading on the meter, and achieve personal self-interest. [0003] In order to achieve the purpose of stealing electricity, the self-interested person adopts the method of adding auxiliary lines outside the meter, so that part or all of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/24G01R11/25G01R19/10
Inventor 季小明
Owner 季小明
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