CN2489506Y

CN2489506Y - Electric monitor for single phase system

Info

Publication number: CN2489506Y
Application number: CN 01248779
Authority: CN
Inventors: 阎善贵; 毕新华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-23
Filing date: 2001-07-23
Publication date: 2002-05-01
Anticipated expiration: 2011-07-23

Abstract

The utility model relates to a single-phase electric consumption monitor, which belongs to an anti-theft electric device. A total controlling circuit is composed of a starting circuit and a controlling circuit. A coupling capacitor C9 is spliced between an anode of a diode D9 and a cathode of a diode D10 in a signal input circuit. One path of the positive end of the coupling capacitor C9 is connected with the output end of a current mutual inductor DL, and the other path is connected with a signal input thread L1 via a current-limiting resistor R6, and the other end of the signal input thread L1 is connected with the output end of the current mutual inductor DL1 provided under an electric meter. The utility model has good effects of preventing various electric larceny behaviors, and has the advantages of automatic throw cutting and recovery, large capacitance and low cost. Thread loss is obviously reduced, the economic benefit of an electricity supply enterprise is enhanced substantially. The performance is stable and reliable. The utility model is the preferred electric consumption monitoring device for reducing the thread loss of a civil electricity supply line.

Description

Single-phase power monitoring device

The utility model relates to a kind of single-phase power monitoring device EW, belongs to anti-electricity-theft device, is the Monitor for electricity use that the folk power supply circuit reduces the line loss first-selection.

Prevent stealing, reduce line loss and be power supply enterprise for a long time, fail a great technical barrier effectively solving always, report according to interrelated data, in stealing serious area comparatively, its line loss reaches 51.62%, thereby visible and electric power system is set up among the user who purchases the electricity relation, have a considerable amount of users in various degree exist stealing electricity phenomenon, be that ammeter is not walked in electricity consumption, make power supply enterprise suffer enormous economic loss, a large amount of electric energy is run off, at the problems referred to above, electric industry management department had once taked such as the line inlet pipe together with power supply enterprise, the table inlet, case a series of precautionary measures such as lock, tighten management strengthens multiple administrative measures such as inspection dynamics in addition, but, because of the original backwardness of its method obtained produce effects not obvious.Based on above-mentioned situation, the product that has anti-stealing electricity function is in recent years come out one after another, the function that has the overload tripping operation concurrently that also has, and the appearance of described product is played certain positive role to anti-electricity-theft, reduction line loss.But, also expose some fatal shortcomings and part not fully up to expectations by the operation practice, for example, anti-electricity-theft product in the past all is powerless to the stealing that utilizes technological means such as specific purpose tool to carry out; The user is taking place when electricity filching behavior is arranged in what and for example have, tripping operation outage can not recover electricity consumption automatically, must need the electric industry department supplier of electricity of sending someone again again can recover use, so both inconvenient user, involve the manpower of power supply enterprise again, therefore it is applied and be subjected to certain limitation.

The purpose of this utility model is to provide a kind of generation that can effectively prevent various electricity filching behaviors, obviously reduce line loss, automatic switching, recovery automatically, static reactive consume, the little cost of volume is low, capacity is big and the significant single-phase power monitoring device of economic results in society.

The purpose of this utility model realizes by the following technical solutions: be the total control circuit that constitutes by starting circuit and control circuit, and its coupling capacitance C ₉Negative pole end be plugged on diode D in the signal input circuit ₉Anode and diode D ₁₀Negative electrode between, capacitor C ₉The output of positive terminal one tunnel and current transformer DL join, another road is by current-limiting resistance R ₆With signal input line L ₁Join signal input line L ₁The other end and the current transformer DL that divides into of kilowatt-hour meter ₁Output join.

Described total control circuit also comprises the zero line and the power input line L that are attempted by starting circuit ₂Between by light-emitting diode VD ₁With current-limiting resistance R ₀₁The stealing indicating circuit that serial connection forms.

Described total control circuit comprises that also is attempted by a power input L ₂With N ₂Between by current-limiting resistance R ₀₂With light-emitting diode VD ₂The power indicating circuit that serial connection forms.

The utility model compared with prior art owing in signal input circuit, increased a coupling capacitance C ₉With by holding wire L ₁Link to each other with current transformer that kilowatt-hour meter is divided into and a series of technical measures such as stealing and power indicating circuit and have power-steeling preventing effect good through evidence, and can also effectively prevent to utilize the technological means stealing, electricity filching behavior takes place show automatic switching, 0-45 after electricity filching behavior is eliminated recovers in second automatically, the big cost of capacity is low, obviously improve the economic benefit of power supply enterprise, reduce line loss significantly; Stable and reliable for performance, be beneficial to and apply.

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is a circuit block diagram of the present utility model.

Embodiment of the present utility model is described in conjunction with the accompanying drawings, and total control circuit comprises starting circuit and control circuit composition, coupling capacitance C ₉Negative pole end be plugged on diode D in the signal input circuit ₉Anode and diode D ₁₀Negative electrode between, capacitor C ₉The output of positive terminal one tunnel and current transformer DL join, another road is by current-limiting resistance R ₆With signal input line L ₁Join signal input line L ₁The other end and the current transformer DL that divides into of kilowatt-hour meter ₁Output link to each other.Also comprise a zero line and a power input line L who is attempted by starting circuit ₂Between by light-emitting diode VD ₁With current-limiting resistance R ₀₁The stealing indicating circuit that serial connection forms; Comprise that also is attempted by a power input L ₂With N ₂Between by current-limiting resistance R ₀₂With light-emitting diode VD ₂Serial connection forms power indicating circuit.

When the utility model used, watch-dog placed between power supply and the kilowatt-hour meter, when normal uses with situation was identical in the past, when the user has the electricity filching behavior generation, the light-emitting diode VD of stealing indicating circuit ₁Luminous demonstration, the signal code of current transformer DL induction this moment is through capacitor C ₉Diode D is delivered in coupling ₉Anode, D ₁₀Anti-phasely prevent the signal code short circuit, signal code is through D ₉Be rectified into the direct current of pulsation, variable resistor R _wReconcile the amplitude of signal code, capacitor C ₅, C ₈And resistance R ₅Form π type filter circuit, filtered signal code is through D ₆Deliver to controllable silicon T ₂Trigger electrode, T ₂Conducting, AC power is through D ₂Be rectified into the direct current of pulsation, through C ₆Filtering, one road electric current are through the winding of relay J and work, after R ₁, T ₂, the normally closed point of relay J is got back to N ₂One side; Another road electric current is through R ₃, R ₂Give capacitor C ₂Charge to certain voltage, through voltage stabilizing didoe D ₄Deliver to controllable silicon T ₁Trigger electrode, T ₁The energising of relay J, capacitor C are kept in conducting ₂Through diode D ₅Discharge and finished T in about 60 seconds ₁Turn-off, then relay J discharges and sets back, and realizes the stealing monitoring purposes with electric line.

Claims

1, a kind of single-phase power monitoring device is the total control circuit that is made of starting circuit and control circuit, it is characterized in that coupling capacitor C ₉Negative pole end be plugged on diode D in the signal input circuit ₉Anode and diode D ₁₀Negative electrode between, capacitor C ₉The output of positive terminal one tunnel and current transformer DL join, another road is by current-limiting resistance R ₆With signal input line L ₁Join signal input line L ₁The other end and the current transformer DL that divides into of kilowatt-hour meter ₁Output link to each other.

2, power monitoring device according to claim 1 is characterized in that described total control circuit also comprises a zero line and a power line L who is attempted by starting circuit ₂Between by light-emitting diode VD ₁With current-limiting resistance R ₀₁The stealing indicating circuit that serial connection forms.

3, power monitoring device according to claim 1 is characterized in that described total control circuit comprises that also is attempted by a power input L ₂With N ₂Between by current-limiting resistance R ₀₂With light-emitting diode VD ₂The power indicating circuit that serial connection forms.