CN2062453U

CN2062453U - Electric meter with limited current and anti-stealing electricity function

Info

Publication number: CN2062453U
Application number: CN 89218976
Authority: CN
Inventors: 靳文君
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-11-08
Filing date: 1989-11-08
Publication date: 1990-09-19

Abstract

The utility model discloses an electric meter with the functions of limited current and anti-stealing electricity, comprising a counting system, a relay, a switch circuit and a current detecting element. The electric meter with the functions of limited current and anti-stealing electricity can automatically cut off the power supply and give the alarm of a red light when a user utilizes electricity over the standard value, or when a person steals electricity by using a live wire and a ground wire, or when a person gets an electric shock; after the situations disappear, the power supply can be delayed to be switched on automatically by the electric meter with the functions of limited current and anti-stealing electricity. Using the electric meter with the functions of limited current and anti-stealing electricity, the personal service life of the electric meter can be extended; the personal safety of power users can be protected; the power supply of the power supply department can be carried out conveniently according to schedule; the phenomenon of the technical electric larceny can be stopped; the state interest is protected; the management of the power supply is beneficial.

Description

Electric meter with limited current and anti-stealing electricity function

The invention belongs to improvement to single-phase watt-hour meter.

Existing single-phase watt-hour meter is made up of main coil D, secondary coil F and mechanical counter 3, this watt-hour meter makes power load strengthen imbalance owing to the power consumption that can not control the user causes not having planned supply and use of electric power on the one hand, main coil also burns out easily, can not prevent that on the other hand the someone from utilizing a phase firewire and a ground wire stealing, can not prevent that more the someone from getting an electric shock.

This improved purpose is to form a complete circuit by adding several miniaturized components; ammeter is cut off the electricity supply automatically at super power consumption and when having the people to utilize a phase firewire and a ground wire stealing; and give a warning; and can avoid the ammeter coil to burn out because of overcurrent; prolonged the serviceable life of ammeter, protected the electricity consumer personal safety, powering according to plan for power supply department provides condition; and can stop the technology stealing electricity phenomenon, help management for electricity consumption.

This improved characteristic is that this watt-hour meter comprises dry reed switch 1, preface mutual inductor 2 and A, B, three windings of C in addition,

capacitor

4,13,10,6,3, resistance 5,

triode

9,11,

diode

7,14, rectistack 15, relay 12 and normal open contact 12-1 thereof, 12-2 luminotron 16,17.The contact that the winding serial connection that is used for the main switch 1 that threshold currents detects is installed in tongue tube H in the loop of watt metering main coil D is connected in series between the collector and emitter that is installed in transistor 9 with resistance 5.Winding A, the B of preface coil 2 in addition that are used for anti-electricity-theft electric shock are serially connected with in the output loop, and the C winding is received the base stage of triode 9 through diode 7.Relay 12 is installed in the collector loop of triode 11, and the collector of triode 9 is installed in the base stage of triode 11.When contact H in the dry reed switch connects or in addition the C winding of preface coil 2 has induction current triode 11 is all with saturation conduction when diode 7 is delivered to triode 9, and its normal open contact of relay 12 adhesives 12-1,12-2 disconnect.Luminotron 16,17 sends ruddiness.

The base bias resistance 5 that the magnetic field force that it is taken place when the output terminal of this watt-hour meter has the super electric current that causes flowing through dry reed switch 1 with electrical phenomena to surpass setting value has been connected triode 11 with the hard contact of inner tongue tube H makes its saturation conduction, its normal open contact of relay 12 adhesives 12-1,12-2 disconnect, thereby cut off power supply, and sent the ruddiness warning by

luminotron

16,17.

When the output terminal of this watt-hour meter has the people to utilize a phase firewire and a ground wire to carry out the technology stealing or have the people to get an electric shock, the different magnetic field of electric current that winding A, the B of other preface mutual inductor 2 are flowed back in diffluence can not be offset the base stage of supplying with triode 9 at alternating voltage of induction on the winding C after diode 7 rectifications fully makes also saturation conduction of the compound with it triode of its saturation conduction 11, relay 12 adhesives its contact 12-1,12-2 disconnect, cut off power supply, and sent the ruddiness warning by

luminotron

16,17.

The single-phase watt-hour meter that uses this improvement to constitute can be cut off the electricity supply automatically and give a warning when electricity consumption of electricity consumer overload or stealing.Automatic again energized after this phenomenon disappears.Both prolong the serviceable life of ammeter, ensured the electricity consumer personal safety, be beneficial to management of power supply and power utilization again.

Fig. 1 is a kind of embodiment:

One the tunnel through capacitor 4 after the energized, rectistack 12 obtains 9,11 work of a DC voltage supply triode after reducing rectification on stabilivolt 14 filter capacitors 13: another road is through the normal open contact of relay 12 12-1,12-2, dry reed switch coil F, winding A, the B of electric degree counting coil D and other preface mutual inductor 2 supply with the output terminal electricity consumer.If electricity consumer is in specified power consumption scope during electricity consumption, flowing through the magnetic field force that electric current produced of coil F of dry reed switch 1 can not be with the contacting of its tongue tube H, or electricity consumer is not when having ground wire stealing of a sharp phase firewire and oncontacting electrical phenomena, the winding A of other preface mutual inductor 2 flows through, the electric current of B is cancelled out each other, another winding C does not have the voltage of inducting, transistor 9 ends, transistor 11 bias voltage that can not get resistance 5 on the one hand can not get the electric current output of compound with it transistor 9 on the other hand and ends like this, relay 12 is in release conditions, entire circuit is power consumption hardly, and watt-hour meter is in normal counting power supply state.

In case during the over-quota electricity consumption of output terminal electricity consumer, the magnetic field force that the electric current of winding F of dry reed switch 1 of flowing through produces is with the contacting of tongue tube H, saturation conduction relay 12 disconnects its normal open contact of adhesive 11-1,12-2 and cuts off the electricity supply automatically thereby transistor 11 obtains bias voltage that resistance 5 provides, and send ruddiness warning by 16,17, with electric loading reduce to ratings when following circuit will with above-mentioned opposite automatic energized.

When the output terminal electricity consumer utilizes a phase firewire and a ground wire, when carrying out stealing or having the people to get an electric shock, flow through the winding A of other preface mutual inductor Z, the electric current that the B diffluence is flowed back to does not wait, magnetic flux can not be offset fully, sense winding C two ends and after diode 7 rectifications, make also saturation conduction of the saturated compound with it then transistor 11 of transistor 9 producing an exchange current, thereby its normal open contact of relay 12 adhesives 12-1,12-2 disconnect and cut off the electricity supply automatically and send the ruddiness warning by luminotron 16,17.After above-mentioned situation disappears, will repeat normal energized process, and recover automatically to power to output terminal.

Claims

1, have threshold currents, the watt-hour meter of anti-electricity-theft electric shock function is characterized in that by dry reed switch 1, preface mutual inductor 2 in addition, resistance 10,6,8,13,4, diode 7,14, triode 9,11, relay 12 and contact 12-1,12-2, compositions such as rectistack 15, generating pipe 16,17.

2, according to claim 1 have a threshold currents, the watt-hour meter of anti-electricity-theft electric shock function, its characteristic is to be used for dry reed switch 1 that threshold currents detects by tongue tube H and form around top coil F, coil F is that serial connection is installed on the loop of watt metering main coil D, and tongue tube H is connected in series between the collector and emitter that is installed in transistor 9 with resistance 5.

3, according to claim 1 have a threshold currents, the watt-hour meter of anti-electricity-theft electric shock function, the preface mutual inductor 2 in addition that it is characterized in that being used for anti-electricity-theft electric shock inspection stream is made up of its winding A, B, C and magnet ring, its winding A, B are serially connected with in the output loop, and the C winding inserts the base stage of triode 9 through diode 7.

4, according to claim 1 have a threshold currents, and the watt-hour meter of anti-electricity-theft electric shock function is characterized in that triode 9 is compound with triode 11 collection bases, and 11 collector loop is equipped with relay 12 its normal open contacts and is connected in series in the input circuit.

5, according to claim 1 have a threshold currents, and relay 12 adhesives its contact 12-1,12-2 disconnected when the watt-hour meter of anti-electricity-theft electric shock function is characterized in that in the dry reed switch 1 contacting.

6, according to claim 1 have a threshold currents, and relay 12 adhesives its contact 12-1,12-2 disconnected when the watt-hour meter of anti-electricity-theft electric shock function is characterized in that the winding C of other preface mutual inductor 2 has induced potential.

7, according to claim 1 have a threshold currents, the watt-hour meter of anti-electricity-theft electric shock function, it is characterized in that adopting red light emitting diodes 16,17 to send ruddiness and warn super electricity consumption, the phenomenon of stealing electric shock, 16,17 all install in the emitter circuit of triode 11, just send ruddiness when having only 11 saturation conductions.