CN2220643Y

CN2220643Y - Multifunction automatic electric using monitor

Info

Publication number: CN2220643Y
Application number: CN 94220791
Authority: CN
Inventors: 金长城; 王文君; 藏勇; 宋振勇
Original assignee: ZHONGXING ELECTRICAL EQUIPMENT FACTORY SHANGZHI CITY HELONGJIANG PROV
Current assignee: ZHONGXING ELECTRICAL EQUIPMENT FACTORY SHANGZHI CITY HELONGJIANG PROV
Priority date: 1994-09-28
Filing date: 1994-09-28
Publication date: 1996-02-21
Anticipated expiration: 2004-09-28

Abstract

The utility model relates to a multifunction electric monitor which can be used automatically and has the functions of excess voltage, electrical leakage, electric shock, time delay, etc. The utility model is composed of a power supply circuit, an overvoltage protection circuit, a signal detection circuit, an anti-interference circuit, a signal amplifying circuit, a triggering delay circuit and a switch driving circuit which are connected with each other. The utility model can be directly installed on a junction box which is arranged below a watt-hour meter and the utility model does not need a meter box and external connecting wires. The utility model has the advantages of convenient installation, wide adaptable voltage range, high load capacity and safety.

Description

Multi-functional automatic electricity consumption monitor

The utility model is a kind of anti-electricity-theft monitor device.

Existing anti-electricity-theft device; " the anti-electricity-theft and electric protective device of watt-hour meter " as Chinese patent 87209082 announcements; can only be anti-electricity-theft and get an electric shock; defencive function is less; Chinese patent 92202902.4 disclosed " multi-functional electricity consumption monitor " is though defencive function is more; but it is narrower to be suitable for voltage range, and need take up room separately and external connection, and cumbersome, no self-locking device is installed.

The purpose of this utility model provides a kind of kinds of protect functions such as anti-electricity-theft, overvoltage, electric leakage, electric shock and time-delay that have; simple, the suitable voltage range broad of circuit; has self-locking device; do not need external connection; do not need to take up room separately, can be directly installed on the multi-functional automatic electricity consumption monitor on the ammeter terminal box.

The utility model shell is a kind of square box body; comprise housing and loam cake two parts; loam cake divides big lid and tegillum two parts; tegillum is pressed on greatly and covers; on locking press button is arranged, power-supply circuit, signal deteching circuit, anti-jamming circuit, signal amplification circuit, overvoltage crowbar, triggering delay circuit, switch driving circuit are arranged in the shell.Power-supply circuit links to each other with the relay of input circuit, overvoltage crowbar, signal amplification circuit and switch driving circuit; overvoltage crowbar links to each other with the triggering delay circuit; signal deteching circuit and input circuit; link to each other with output circuit and anti-jamming circuit by relay tip; anti-jamming circuit links to each other with signal amplification circuit; signal amplification circuit links to each other with the triggering delay circuit, triggers delay circuit and links to each other with switch driving circuit.When this monitor is connected with watt-hour meter, incoming line is linked to each other with two output terminals of watt-hour meter, two output lines of monitor link to each other respectively with electric loading.

The utility model directly is connected with the watt-hour meter output terminal owing to input end, output terminal is connected with load, without external wire, do not take up room, need not reequip watt-hour meter, simple installation is owing to used locking press button on shell, can't open in case just press, so on structure, also played anti-electricity-theft effect.The utility model is simple in structure, and have simultaneously anti-electricity-theft, touch electric leakage, overvoltage and delay protection function.

Description of drawings.

Fig. 1 is the utility model monnolithic case figure.

Fig. 2 is the utility model circuit block diagram.

Fig. 3 is the utility model circuit theory diagrams.

Fig. 4 is the wiring diagram after the utility model inserts watt-hour meter.

Embodiment:

The utility model shell is a square box body, comprises housing 1, loam cake, and loam cake comprises big lid 3 and tegillum 2 two parts, and tegillum is pressed on greatly and covers, and locking press button 4 is arranged above.Power-supply circuit, signal deteching circuit, anti-jamming circuit, signal amplification circuit, overvoltage crowbar, triggering delay circuit, switch driving circuit are arranged in the box.Power-supply circuit is by transformer B ₁, diode D ₁～D ₄, resistance R ₅, electrochemical capacitor C ₅, C ₃Form, this circuit is reduced to 12V with supply voltage through transformer, by D ₁～D ₄Bridge rectifier C ₅Provide DC15V instrument operating voltage after the filtering, through R ₅, C ₃Provide operating voltage for IC after the step-down filtering.Signal deteching circuit is by zero-sequence transformer L ₁, L ₂, L ₃Form, when stealing or electric leakage situation take place when, L ₁, L ₂On the size of current that flows through do not wait or the direction difference, magnetic flux changes, L ₃On induce corresponding electric signal, through after level handle the rear drive actuating of relay, contact J _kSuction is opened, and cuts off the electricity supply, and has stoped the continuation of stealing or electric leakage situation, after recovering normally, just can send electricity work after time-delay.Anti-jamming circuit is by resistance R ₁, capacitor C ₁, C ₂Deng forming mode filter, filtering high-frequency interferencing signal and the electricity two electric current and voltages sudden change that causes by certain reason and the undesired signal that forms has been avoided misoperation, guarantee the circuit operate as normal.Signal amplification circuit is by triode BG ₁, resistance R ₁, R ₄Form, the signal voltage of filtering interference signals is added to BG ₁Base stage on after amplifying at R ₂The last signal voltage that produces after amplifying is through R ₄Be added to the 2 pin drive IC work of IC.Overvoltage crowbar is by triode BG ₂Stabilivolt D ₅, resistance R ₃, R ₃Form, line voltage is through D ₁～D ₄Bridge rectifier C ₅Export 15V (DC) voltage after the filtering, at this moment D ₅Not conducting, BG ₂By IC no-output, relay place normally off, the load operate as normal, when line voltage rises to 275V, D ₁～D ₄Output voltage will rise to 24V thereupon, make D ₅Puncture conducting, R ₃The signal voltage of last generation is added to BG ₂On the base stage through BG ₂After the amplification, 2 pin of IC are low level when making its collector voltage drop to 1/3 power supply service voltage, and IC triggers upset 3 pin output high level, BG ₃Conducting, J _kAdhesive is cut off the electricity supply, and stops power supply, and has finished the function of overvoltage protection.Triggering delay circuit is by integrated circuit (IC), resistance R ₇, capacitor C ₄, C ₅Form, its effect is with BG ₁Stealing and the electric leakage signal and the BG of output ₂The overvoltage signal of output amplifies through the work of digital processing rear drive late-class circuit, C by IC ₄For input signal plays filtering stabilization, R ₇And C ₅Be delay circuit.The exploitation driving circuit is by triode BG ₃, diode D ₆, resistance R ₆, relay J forms, effect is by IC the digital signal of triggering delay circuit output ₃Pin is through R ₆Be added to BG ₃Base stage is through BG ₃Amplify the action of rear drive relay J, D ₆Can make the J action reliable and stable.Power-supply circuit and input circuit, overvoltage crowbar, signal amplification circuit link to each other, overvoltage crowbar with trigger delay circuit and link to each other, signal deteching circuit and input circuit, pass through relay tip J _kLink to each other with output circuit, anti-jamming circuit, anti-jamming circuit links to each other with signal amplification circuit, and signal amplification circuit links to each other with the triggering delay circuit, triggers delay circuit and links to each other with switch driving circuit.When the utility model is connected with watt-hour meter, electric power incoming line links to each other with the input end 11 of watt-hour meter 7 and keeps motionless, same electric power incoming line links to each other with the input end 9 of watt-hour meter 7 and keeps motionless, the output terminal 10 of watt-hour meter 7 links to each other with the incoming line 12 of monitor, the output terminal 8 of watt-hour meter links to each other with monitor incoming line 13, and the output line 6 of monitor links to each other respectively with electric loading 14 with output line 5.

Claims

1, a kind of multi-functional automatic electricity consumption monitor, it comprises power-supply circuit, signal deteching circuit, anti-jamming circuit, signal amplification circuit, overvoltage crowbar, triggering delay circuit, switch driving circuit, it is characterized in that;

A, power-supply circuit link to each other with input circuit, overvoltage crowbar, signal amplification circuit, and overvoltage crowbar links to each other with the triggering delay circuit, and signal deteching circuit and input circuit are by relay tip J _kLink to each other with output circuit, anti-jamming circuit, anti-jamming circuit links to each other with signal amplification circuit, and signal amplification circuit links to each other with the triggering delay circuit, triggers delay circuit and links to each other with switch driving circuit;

The incoming line of b, monitor (12) links to each other with the output terminal (10) of watt-hour meter, and the incoming line of monitor (13) links to each other with the output terminal (8) of watt-hour meter, and two output lines (6) of monitor link to each other respectively with electric loading (14) with (5).