CN2079298U

CN2079298U - Electricity fraudulent use preventing device

Info

Publication number: CN2079298U
Application number: CN 90221000
Authority: CN
Inventors: 李来顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-21
Filing date: 1990-09-21
Publication date: 1991-06-19

Abstract

The utility model relates to an electricity theft preventing device used with a civil electrical meter in a matching mode, which is composed of a current mutual inductor, a Wheatstone resistance bridge, a switch pipe, a relay, etc. The balance of the output of the resistance bridge is controlled by utilizing the current voltage of the current mutual inductor to cut off or conduct the switch pipe, and thus, the relay is triggered to be cut off and closed. Thereby, electricity behaviors can be prevented from occurring.

Description

Electricity fraudulent use preventing device

The utility model relates to a kind of and the anti-electricity-theft device matched use of civil watt-hour meter.

The known stealing mode that prevents is broadly divided into:

1. big tail-hood formula: be about to watt-hour meter junction box and change big lid into, the watt-hour meter wiring is buckled in the inside, to prevent user's stealing.

2. big bell-type: made of plasticly can prevent stealing with watt-hour meter with the shell that the table tail covers.

3. the device that provides for electronic type anti-electricity-theft device such as CN86204342, though its power-steeling preventing effect is fine, it is too much to exist used electronic component, the shortcoming that cost is high, and preceding dual mode also can only be dealt with problems on the surface of watt-hour meter, when adopting the off-balancesheet stealing, then can't prevent.

It is little that the purpose of this utility model is to invent a kind of volume, highly sensitive, the Anti-electricity-stealing device that cost is low.

Of the present utility model being contemplated that: adopt two current transformers and resistance bridge as the load monitoring part, utilize whether steadily controlling of resistance bridge report to the police part the switching tube conducting or end.Trigger relay disconnects or is closed, reaches the effect that prevents stealing.

Fig. 1 is a wiring layout of the present utility model.

Fig. 2 is casing figure of the present utility model.

Fig. 3 is a wiring diagram of the present utility model.

The utility model is by casing load monitoring part, the formations such as part and power supply of reporting to the police, and with reference to Fig. 3, electric current mutual inductor L ₁, L ₂, resistance R ₁～R ₄, diode D ₁～D ₄Capacitor C ₁, C ₂Form the load monitoring part, current transformer L ₁, L ₂The output terminal of the winding diode D that joins respectively ₁, D ₂Back and C ₁, C ₃And C ₂, D ₄In parallel.R ₁, R ₃And R ₂, R ₄The Hui Sideng resistance bridge is formed in butt joint.Resistance R ₅, R ₆Form switching tube BG ₁Base electrode bias resistance and BG ₁Base stage join resistance R ₇One termination BG ₁Collector, other end sending and receiving optical diode D ₇And relay J ₁Input end, light emitting diode D ₇, D ₈Be connected to relay J respectively ₁Normally closed point, the B of often making war, D ₈Another termination BG ₁Emitter, by capacitor C ₃, C ₄And diode D ₅, D ₆Transformer B ₁Form power circuit, wherein B ₁Output winding and D ₆Series connection back and C ₃, C ₄, C ₅In parallel respectively, capacitor C ₃Be connected to relay J ₁And D ₈Two ends, power transformer (220V/12V) passes through D ₆Rectification, capacitor C ₃, C ₄Filtering, D ₅A 12V DC voltage is more stably formed in voltage stabilizings etc., for this device provides operating voltage.According to Fig. 1 .2 casing of the present utility model is rectangle, and the front is provided with two light emitting diode lamp D ₇, D ₈, top panel has 9 connection terminals, wherein 1# taps into the family phase line, 2# taps into the family zero line, 3# connects and hands over whole mutual inductor L ₁-1 one end, 4# meets L ₁-2 ends, 5# are succeeded electrical equipment J ₁Normally closed point output to the house lead in disconnecting link, 6# connects the ammeter incoming line, 7# ammeter output line, 8#, 9# line connect the ammeter zero line.

This Anti-electricity-stealing device in use, with current transformer L ₁, L ₂Be serially connected in civil power house lead in and ammeter output line respectively, when the user normally makes electrical appliance, current transformer L ₁, L ₂Produce synchronizing current voltage, make electric bridge held stationary state, warning part switching tube BG ₁Base stage can not get enough electric currents, makes switch be in cut-off state, relay J ₁Be failure to actuate, the house lead in phase line is connected across on the normally closed point of relay, makes the user can normally use various electrical equipment.And when various means stealing is promptly adopted in the unreasonable electricity consumption of user, two current transformer L ₁, L ₂To produce and not wait current/voltage, electric bridge output is uneven, switching tube BG ₁Conducting makes the relay adhesive, and normally closed point disconnects, and cut off civil power house lead in power supply, and when the user stopped stealing, electric bridge restores balance, switching tube BG ₁End normally closed some adhesive of relay, circuit restoration normal power supply.

Claims

1, the Anti-electricity-stealing device a kind of by casing, load monitoring part, that report to the police part, power supply etc. are formed is characterized in that:

A, casing are rectangle, and the front is provided with two light emitting diode lamp D ₇, D ₈, top panel has 9 connection terminals, and wherein 1# taps into the family phase line, and 2# taps into the family zero line, and 3# meets D.C mutual-inductor L ₁-1 end, 4# meets L ₁-2 ends, 5# are succeeded electrical equipment J ₁Normally closed point output to the house lead in disconnecting link, 6# connects the ammeter incoming line, 7# connects the ammeter output line, 8#, 9# line connect the watt-hour meter zero line,

B, load monitoring part are by electric current mutual inductor L ₁, L ₂, resistance R ₁～R ₄, diode D ₁～D ₄, capacitor C ₁, C ₂Constitute, wherein L ₁, L ₂The output terminal of the winding diode D that joins respectively ₁, D ₂Back and C ₁, D ₃And C ₂, D ₄Parallel connection, resistance R ₁R ₃And R ₂, R ₄Resistance bridge, resistance R are formed in butt joint ₅, R ₆Form switching tube BG ₁Base electrode bias resistance and BG ₁Base stage join resistance R ₇One termination BG ₁Collector, other end sending and receiving optical diode D ₇And relay J ₁Input end, light emitting diode D ₇, D ₈Be connected to normally closed some A of relay respectively, Chang Kaiguan B, D ₈Another termination BG ₁Emitter.