CN2144310Y

CN2144310Y - Electric meter capable of avoiding or indicating fradulent use of electricity

Info

Publication number: CN2144310Y
Application number: CN 92212248
Authority: CN
Inventors: 哈亚军
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-19
Filing date: 1992-02-19
Publication date: 1993-10-20
Anticipated expiration: 2002-02-19

Abstract

The utility model discloses an electric meter capable of avoiding or indicating the fraudulent use of electricity, comprising a pulse timing circuit which is additionally arranged in a common electric meter, and a board inserting type connection box. The electric meter capable of avoiding or indicating fraudulent use of electricity can be used to prevent the fraudulent use of electricity, and can judge and meter the amount of the fraudulent use of electricity. The utility model has the advantages of simple structure, easy fabrication.

Description

Electric meter capable of avoiding or indicating fradulent use of electricity

The utility model relates to a kind of watt-hour meter, the common name ammeter.

Existing ammeter itself lacks the measure that prevents to steal electricity, causes the electric quantity metering loss.

The purpose of this utility model is to design a kind of ammeter that can prevent to steal electricity.

Technical solution of the present utility model is antitheft electric formula ammeter, and a pulse timing circuit is housed in ammeter, and the terminal box of ammeter adopts the board plug type terminal box; The pulse timing circuit is electrically connected successively by pulse signal circuit, midget relay and timer to be formed, and pulse signal circuit is electrically connected to the potential winding and the current coil of ammeter respectively by two regulator rectifier circuits; The board plug type terminal box is made of plug that has plate and contact and the socket that has slot and a contact, and the plate of plug inserts the slot of socket, and the contact on the plate contacts with contact on the socket.

Pulse signal circuit is by resistance R 1, the input end that capacitor C 1 is electrically connected to the rectifier bridge heap D1-D4 that 4 diodes are connected into is connected to base stage and the emitter of triode BG through resistance R 2, the collector of triode BG is as the output terminal of pulse signal circuit, be electrically connected to midget relay, be electrically connected with the current coil L1 of ammeter through the regulator rectifier circuit I with the emitter of triode BG by midget relay again.The potential winding L2 of ammeter is electrically connected to the two ends of resistance R 1 by the regulator rectifier circuit II, as the input of pulse signal circuit.

Referring to accompanying

drawing

1,2,3,4

Description of drawings is as follows:

Accompanying drawing 1 antitheft electric formula ammeter shape assumption diagram

Accompanying drawing 2 plug-in type junction box structure synoptic diagram

Accompanying drawing 3 pulse timing circuit connection diagrams

Accompanying drawing 4 pulse signal circuit connection layout

Specific embodiment of the utility model is antitheft electric formula single-phase watt-hour meter.A pulse timing circuit ［ 1 ］ is housed in common single-phase watt-hour meter box, and pulse timing circuit ［ 1 ］ is packed on the circuit board; The terminal box of ammeter adopts board plug type terminal box ［ 2 ］; Pulse timing circuit ［ 1 ］ is electrically connected successively by pulse signal circuit ［ 3 ］, midget relay and timer to be formed, and pulse signal circuit ［ 3 ］ is electrically connected to the potential winding L1 and the current coil L2 of ammeter respectively by regulator rectifier circuit I and regulator rectifier circuit II; Relay J adopts GD-125 type midget relay, and it is the common electrical sublist of E-388 that timer adopts the time base circuit chip; The board plug type terminal box is made of the board plug type plug and socket, have plate ［ 4 ］ on the plug, have contact ［ 5 ］ on the plate, have slot ［ 6 ］ on the socket, contact ［ 7 ］ is arranged on the seat wall of slot both sides, the plate of plug ［ 4 ］ inserts in the slot ［ 6 ］ of socket, and the contact of plug ［ 5 ］ contact with the contact ［ 7 ］ of socket.Be electrically connected with dark lead c between two contacts ［ 5 ］ on the plate ［ 4 ］; Two contacts ［ 7 ］ on the socket secretly are electrically connected to a, b 2 points on the input end of pulse signal circuit ［ 3 ］ respectively.2 place leads of the A that ammeter is electrically connected with power supply network, B and ammeter are electrically connected with the built-in circuit of ammeter by the binding post in the board plug type terminal box respectively with 2 place leads of C, D that load links.Timer shows screen ［ 8 ］ places on the electric meter box face.The battery of the timer mouth that changes the outfit is located at ［ 9 ］ on the electric meter box face.The plug construction of board plug type terminal box is a rectangle ghost box body, lower opening, two blocks of plates ［ 4 ］ are arranged in the box body, a contact ［ 5 ］ is arranged on every block of plate ［ 4 ］, socket is the shell box body of a double-deck intussusception, space between intussusception box body two-layer constitutes slot ［ 6 ］, the rectangular box of plug is whole be plugged in two grooves in socket middle part every slot ［ 6 ］ in, a contact ［ 7 ］ is respectively arranged on its slot wall, after plug was plugged in the slot of socket, the contact of plug ［ 5 ］ contacted with the contact ［ 7 ］ of socket.Two control input ends of the M among Fig. 3, Fig. 4, N point expression relay, two contacts of starting switch on 2 expressions of the p on the timer, q electronic stopclock, 2 of p, q respectively with relay on armature contact be connected with normally open contact.Be the pulse timing circuit part among Fig. 3 in the frame of broken lines, frame of broken lines is outward this body structure of common electrical kilsyth basalt, and each element of pulse timing circuit in the frame of broken lines can be integrated in upward (see figure 1) of a monoblock circuit board ［ 1 ］ by similar integrated package.

Pulse signal circuit ［ 3 ］ is referring to accompanying drawing 4, is the input end that is electrically connected to the rectifier bridge heap D1-D4 that four diode electricallies connect into by resistance R 1 and capacitor C 1, and diode adopts 1N4001 type diode; Rectifier bridge heap D1-D4 output terminal is electrically connected to base stage and the emitter of triode BG through resistance R 2, the collector of triode BG is as the output terminal of pulse signal circuit ［ 3 ］, be electrically connected to midget relay J, be electrically connected with the current coil L1 of ammeter through the regulator rectifier circuit I with the emitter of triode BG by relay J again, the potential winding L2 of ammeter is electrically connected to the two ends of resistance R 1 via the regulator rectifier circuit II, as the input of pulse signal circuit, triode adopts 3DG6.

Its principle of work is: when antitheft electric formula ammeter was powered, incoming call promptly by capacitor C 1 charging of pulse signal circuit ［ 3 ］, produced a positive pulse and makes the relay J closure once, promptly disconnected after pulse disappears, so the startup timer picks up counting.When outage, it is the loop of off voltage coil L2, rectifying voltage regulator II no signal voltage then, capacitor C 1 discharge of pulse signal circuit ［ 3 ］, produce a negative arteries and veins and fill and dash, after bridge heap D1-D4 is anti-phase, amplify by triode BG, pilot relay J closure again once makes electronic timer stop timing.Attempt the current coil L1 two ends of short circuit ammeter as the people, when being A on the board plug type terminal box, C two binding posts, then must cross over the slot on the socket ［ 6 ］ in the terminal box with lead, make the contact short circuit, but because slot ［ 6 ］ size at four sides is too little, and plate ［ 4 ］ cooperates closely with slot ［ 6 ］ grafting, if any adding lead, then contact ［ 3 ］ can not normally contact with ［ 7 ］, a, the b point that is input end in the pulse signal circuit ［ 3 ］ is disconnected, make pulse signal circuit ［ 3 ］ ditto manage pilot relay J action one this, make timer stop timing.

Differentiate when whether stealing electricity, the power on/off time and the contrast of electric power system real work power on/off time that only need timer is put down in writing can detect.

Stealing electric electricity can measure by following formula:

d＝ (D2－D1)/(T2－T1) （T4－T3－T5＋T1－T2）

Wherein:

T1---between timer institute timing at the beginning of the month

T2---between timer institute timing at the end of month

T3---the beginning of the month calendar time

T4---the end of month calendar time

T5---this moon has a power failure the cumulative time

D1---the beginning of the month, watt-hour meter was counted the electric degree number

D2---the end of month, watt-hour meter was counted the electric degree number

D---steal the electric degree number

The utility model has the advantage of simple in structurely, easy to manufacture, prevent from stealing electricity with extra pulse timing circuit and board plug type terminal box, and can distinguish and calculate robber's electric degree quantity.

Claims

1, a kind of antitheft electric formula ammeter, it is characterized in that in ammeter, being equipped with a pulse timing circuit [1], the terminal box of ammeter is board plug type terminal box [2], pulse timing circuit [1] is electrically connected successively by pulse signal circuit [3], midget relay J and timer to be formed, and pulse signal circuit [3] is electrically connected to the potential winding and the current coil of ammeter respectively by two regulator rectifier circuits; Board plug type terminal box [2] is made of plug that has plate [4] and contact [5] and the socket that has slot [6] and contact [7], and the plate of plug [4] inserts in the slot [6] of socket, and the contact of plug [5] contact with contact [7] on the socket.

2, antitheft electric formula ammeter according to claim 1, it is characterized in that its pulse signal circuit ［ 3 ］ is by resistance R 1, the input end of the rectifier bridge heap D1-D4 that 4 diodes of capacitor C 1 electrical connection are connected into, the output terminal of rectifier bridge heap is connected to base stage and the emitter of triode BG through resistance R 2, the collector of triode BG is as the output terminal of pulse signal circuit ［ 3 ］, be electrically connected to midget relay J, be electrically connected with the current coil L1 of ammeter via the regulator rectifier circuit I with the emitter of triode BG by midget relay J again, the potential winding L2 of ammeter is electrically connected to the two ends of resistance R 1 through the regulator rectifier circuit II, as the input of pulse signal circuit ［ 3 ］.