CN2181002Y

CN2181002Y - Electricity meter capable of preventing fraudulent use

Info

Publication number: CN2181002Y
Application number: CN 93246749
Authority: CN
Inventors: 苗金元
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-01
Filing date: 1993-12-01
Publication date: 1994-10-26
Anticipated expiration: 2003-12-01

Abstract

The utility model relates to an electricity meter capable of preventing fraudulent use. A main control circuit is serially connected in the current circuit of the main circuit of the existing electricity meter. The main control circuit is composed of the following elements. A main control element is bidirectional thyristor. A trigger circuit adopts a bidirectional trigger diode serially connected with both ends of the main control element via current limiting resistor, and moreover, an absorption circuit composed of resistor and capacitance is connected with two main electrodes of the bidirectional thyristor in parallel. The electricity meter capable of preventing fraudulent use has simple structure, and low cost, and is especially suitable for being generalized and applied in the power industry.

Description

Electricity meter capable of preventing fraudulent use

The utility model relates to a kind of anti-electricity-theft electric energy meter.

The phenomenon of theft electric power in all parts of the country is in recent years increasing gradually, and there is quite a few stealing family to come stealing by electric energy meter, because mainly containing driving element current coil, potential winding and rotating element aluminium dish sum counter, induction type electric energy meter forms, in electric energy meter incoming transport circuit, under the inductive loop of voltage power supply magnetic flux and the generation of current work magnetic flux interacts, the aluminium dish moment that rotates begins to rotate, and the drive counter carries out electric energy metrical, if off voltage connecting plate, the aluminium dish just stops operating, and reaches the purpose of stealing.

The purpose of this utility model is exactly the deficiency according to existing electric energy meter, and a kind of anti-electricity-theft electric energy meter simple in structure is provided.

The purpose of this utility model is achieved like this: be in series with a main control loop in the current return of existing single-phase electric energy meter or three-phase electric energy meter, main control loop trigger end and voltage circuit join, wherein main control loop is made of following element, the master element bidirectional triode thyristor is connected in the main circuit current loop of electric energy meter and carries out work, trigger circuit adopt bidirectional trigger diode to be serially connected in the bidirectional triode thyristor two ends through current-limiting resistance, and the absorption circuit of being made up of resistance and capacitor is connected in parallel on two central electrodes of bidirectional triode thyristor; The potential winding of main control loop and electric energy meter, current coil, aluminium dish sum counter are formed anti-electricity-theft electric energy meter jointly.

Anti-electricity-theft principle of the present utility model is as follows: as people's off voltage connecting plate, the trigger end of main control loop loses trigger voltage, at this moment main control loop disconnects, no-output voltage, entire circuit disconnects, and reaches anti-electricity-theft purpose, when the voltage connecting plate closes, trigger circuit are triggered, the main control loop conducting, and output terminal restores electricity.

The utility model mainly contains following advantage: 1, change former simple function for existing multi-functional, both had the function of metering electric energy, increased anti-stealing electricity function again; 2, do not influence former electrical energy meter accuracy, cost has only increased very little, has improved the market competition ability; 3, be the anti-electricity-theft splendid electric energy meter of China's power industry, have very big promotion and application and be worth.

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is the utility model main control loop schematic diagram.

Fig. 2 is principle of work and the structural representation of the utility model when being single-phase electric energy meter.

Fig. 3 is the principle of work synoptic diagram of the utility model when being three-phase electric energy meter.

As shown in Figure 1, master element is bidirectional triode thyristor KS in the main control loop, and trigger circuit adopt the DIAC bidirectional trigger diode through current-limiting resistance R ₁Be connected on the two ends G end G of bidirectional triode thyristor KS ₁End is at two electrode T of master element ₁, T ₂On be parallel with by resistance R ₂, capacitor C ₁The absorption circuit of forming is formed main control loop by above each element, and wherein master element KS selects bidirectional triode thyristor BT series for use, but it has through triggering the function of two-way admittance, current-limiting resistance R ₁Size be resistance R ₂The size 13 times to 15 times, capacitor C ₁Be 0.1uf, the DIAC bilateral diode adopts DB ₃The type bidirectional trigger diode; Shown in Fig. 2,3, anti-electricity-theft electric energy meter is by driving element current coil L ₁' (L ₁, L ₃, L ₅) and potential winding L ₂' (L ₂, L ₄, L ₆), rotating element aluminium dish LP and the counter JS that is driven and the main control loop that is connected in the current return form main control loop trigger end G ₁(G ₂, G ₃, G ₄) be connected in the voltage circuit wherein a, a among the figure ₁, a ₂, a ₃, b, b ₁, b ₂, b ₃Be the internal interface line end, A, A ₁, A ₂, A ₃Be potential winding link, a ₁', a ₂', a ₁", a ₂", a ₃", a ₄" be the external connection input end, b ₁', b ₂', b ₁", b ₂", b ₃", b ₄" be the external connection output terminal; When can reequiping according to different watt-hour meter, selects by the bidirectional triode thyristor of ubi supra the different model in the BT series for use.

Claims

1, a kind of by driving element current coil L ₁' (L ₁, L ₃, L ₅) and potential winding L ₂' (L ₂, L ₄, L ₆), the anti-electricity-theft electric energy meter formed of rotating element aluminium dish LP sum counter JS, it is characterized in that being in series with in the current return main control loop, master element is bidirectional triode thyristor KS in the main control loop, trigger circuit adopt the DIAC bidirectional trigger diode through current-limiting resistance R ₁Be connected on two ends G end and the G of bidirectional triode thyristor KS ₁End is at two central electrode T of bidirectional triode thyristor ₁, T ₂On be parallel with by resistance R ₂, capacitor C ₁The absorption circuit of forming is formed main control loop by master element, trigger circuit and absorption circuit three parts, main control loop trigger end G ₁(G ₂, G ₃, G ₄) be connected in the voltage circuit.

2, anti-electricity-theft electric energy meter according to claim 1 is characterized in that current-limiting resistance R ₁Size is current-limiting resistance R ₂The size 13 to 15 times, capacitor C ₁Be 0.1uf, the DIAC bilateral diode adopts DB ₃Type bidirectional trigger diode, master element KS are selected bidirectional triode thyristor BT series for use.