CN1020320C - Carrier-typre device for electric shock protection and avoiding fraudulent use of electricity - Google Patents
Carrier-typre device for electric shock protection and avoiding fraudulent use of electricity Download PDFInfo
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- CN1020320C CN1020320C CN 91103136 CN91103136A CN1020320C CN 1020320 C CN1020320 C CN 1020320C CN 91103136 CN91103136 CN 91103136 CN 91103136 A CN91103136 A CN 91103136A CN 1020320 C CN1020320 C CN 1020320C
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- signal
- electricity
- live wire
- electric
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Abstract
The present invention relates to a carrier type device for electric shock protection and electricity stealing prevention, which is characterized in that an electric appliance, an electric energy meter and a line are monitored in a control section, and a high-frequency monitoring signal is emitted by a signal generator; when the phenomena of electric shock, electricity stealing and excessive power consumption occur in the monitoring section, the high-frequency monitoring signal is lost; after an analyzing and processing process is carried out through some devices, a relay contact is triggered to be switched off to stop power supply; when the operation is eliminated, the standard high-frequency monitoring signal is recovered, and the power is supplied to the line again. The device of the present invention not only can ensure that household electric appliances can not be burnt out because zero wires are cut or the zero wires can not be clearly distinguished, but also can solve the problem of electric shock between a fire wire and a zero wire. The present invention can also prevent electricity from being stolen.
Description
The invention belongs to electrical shock protection, anti-electricity-theft device.
No matter be electric power system or use electric unit, occur electric shock accidents often, the lighter is subjected to electric shock, electricity is hindered, and weight person's accident that causes death has been brought misery to family, has brought burden to society; It is also more serious that stealing electricity phenomenon is gone up by society simultaneously, caused power tense on the one hand, had a strong impact on the economic benefit of electric power system on the other hand.This just impels people to study electrical shock protective device and anti-electricity-theft device.
Early stage electrical shock protective device mainly contains voltage action type electrical shock protective device; eliminated in sixties end; present electric current action type protective device had appearred again afterwards; its cardinal principle can 1 illustrate in conjunction with the accompanying drawings; it is mainly by zero sequence current mutual inductor A; tripping mechanism T and main switch K form, when system takes place that the person gets an electric shock or during the faults such as earth leakage that caused by other reason, and shock current i
rFault current i such as earth leakage
zResultant current i
dBy big ground warp earth connection S
dReturn transformer B neutral point, so the former limit of zero sequence current mutual inductor just there is exciting curent to flow through, in annular core b, produces a magnetic flux Φ
dMake secondary coil induce a corresponding secondary voltage E of magnetic flux therewith; this secondary voltage E is added on the tripping coil T of electric protective device; when fault currents such as electric shock or ground connection reach certain certain value; tripping coil promptly promotes the rapid deenergization of release main switch K; thereby reach the purpose of electrical shock protection, the situation of main line, duplexure electrical shock protection also is like this.The advantage of this protection is to do system-wide total protection, also can do cascade protection along separate routes; Highly sensitive, reliable operation, convenient management.But since its rear portion zero line can not iterative earthing and the household electrical appliance metal shell can not connecting to neutral, so it is disconnected or be hard to tell zero line and the misconnection live wire causes the household electrical appliance scaling loss and cause indirect electric shock problem because of the household electrical appliance electric leakage to solve zero line; From operation principle, the people gets an electric shock and become normal duty between live wire and zero line, and no excitatory on the zero sequence current mutual inductor, switch is failure to actuate, do not have protective effect, as cascade protection, when third level protection tripping operation, relevant I and II protection tripping operation simultaneously, make the power failure scope bigger, easy-to-search accident point not, interruption duration is long, and power supply reliability is low; Be not suitable in overhead system, using, be subjected to extraneous climatic effect bigger, and can only be more suitable in the cable system in the transformer neutral point solidly grounded system.
Anti-electricity-theft device mainly contains the bridge balance formula anti-electricity-theft device of ignition formula stealing alarm device and band pilot wire.The operation principle of the anti-electricity-theft device of band pilot wire can 2 illustrate in conjunction with the accompanying drawings, this device is mainly by main body A and accessories B and pilot wire (4) formation, when electric energy meter (6) operate as normal, identical electric current is flow through on the current transformer (1) that two no-load voltage ratios are identical with performance and the former limit of (2), and the voltage that the secondary that connects of pilot wire (4) produces also becomes certain resistance ratio R
1/ R
2, because of having utilized two two resistance R that resistance is identical
1And R
2, current transformer (1) and (2) and resistance R like this
1And R
2Formed balanced bridge, when the input voltage of alarm appliance (3) is zero, do not worked.When electricity filching behavior that the live wire inlet wire (8) that electric energy meter (6) takes place and outlet (9) are joined, the former limit of the current transformer (1) that makes the current coil (5) of electric energy meter and be close to therewith is by short circuit, at this moment balanced bridge is destroyed, will there be certain input voltage at the two ends of alarm indication device (3), report to the police and send light, this warning light is reflected into main body cover (10) in addition by the red transparency (11) that small pieces are fixed on the main body cover (10), has been hidden in light paper (12) the institute record in the main body (10) simultaneously.Remove when electricity theft over ammeter, electric bridge promptly restores balance, and alarm indication also stops.When monitor additional lead (4) is cut off or when the outlet (9) of additional lead (4) and electric energy meter (6) or inlet wire (8) fraudulent use electricity by short-circuit, the balanced bridge of this monitor is same destroyed and send alarm indication.This device can write down the stealing time, and mechanism is fairly simple, but can only write down electricity filching behavior, can not prevent electricity filching behavior; If develop into anti-electricity-theft device, prevent stealing, electric shock beyond pilot wire that exposes and pilot wire, main body must be contained in from table place far away, has increased length and maintenance cost again; Therefore electricity filching behavior can not be controlled effectively, the warning effect can only be played.Therefore be necessary to invent a kind of can protection against electric shock, device that can be anti-electricity-theft again.
Purpose of the present invention just provides and a kind ofly can accomplish electrical shock protection, can prevent the device of stealing, transgression for using electricity again.
The present invention realizes like this, in the section of being monitored, when getting an electric shock, during situation such as stealing, over capacity electricity consumption, producing fault media high-frequency signal, when fault media high-frequency signal current potential is higher than standard supervisory signal current potential certain value, the normally closed node of relay disconnects, the section of being monitored is stopped power supply, and when fault was eliminated, the fault media signal disappeared, the normally closed node closure of relay is recovered to send.
Accompanying drawing 3, carrier type electrical shock protection, anti-electricity-theft device block diagram.
Accompanying drawing 4, carrier type electrical shock protection, anti-electricity-theft device use installs line map.
Accompanying drawing 5, carrier type electrical shock protection, anti-electricity-theft device body element structure chart.
The monitor configuration figure of accompanying drawing 6, carrier type electrical shock protection, anti-electricity-theft device.
The supervision bar structure figure of accompanying drawing 7, carrier type electrical shock protection, anti-electricity-theft device.
Carrier type electrical shock protection, anti-electricity-theft device are realized and can be illustrated in conjunction with the accompanying drawings.
Carrier type electrical shock protection, anti-electricity-theft device are by the height in the accompanying drawing 3, signal generator of intermediate frequency S
1, high, intermediate-freuqncy signal recipient S
2, signal amplifier F, analysis processor bh, switching manipulation coil KQ and switch F, continuous-current plant ZL, picture monitor ZC
1The main body ZT, the monitor ZC on each electrical appliance that form
2, the rod of the supervision on electric energy meter ZCF, electric energy meter interior electric shock ZCQ, guide plate ZCC constitute.This apparatus main body ZT is installed in the circuit head end that will control, sees accompanying drawing 4, monitor that excellent ZCF is contained in electric energy meter live wire import department, interior contact ZCQ is connected on the fire line terminal through resistance R in the electric energy meter, and guide plate ZCC is contained on the electric energy meter zero terminal, monitor ZC
2Be contained in electrical appliance live wire end or zero line end.
At monitor ZC
1With ZC
2Monitor in the section, during normal electricity consumption, signal generator S
1The standard of sending in monitoring section monitors high-frequency signal; In monitoring section, get an electric shock, when stealing, super consumption electricity consumption, monitor that a section interior supervision high-frequency signal runs off signal generator S
1The big high-frequency signal of emission measure, meanwhile signal receiver S in monitoring section
2Accept this big high-frequency signal and amplify through signal amplifier F, deliver to analysis processor bh analyzing and processing after K switch disconnect, this moment, constant dc power supply device ZL provided power supply to device, itself still works device.When electric shock, stealing, over capacity elimination, present standard again in the supervision section and monitor high-frequency signal, K switch closure after the analysis processor bh analyzing and processing, a supervision section recovery is sent.Transformer T in the accompanying drawing 5
1, resistance R
1, R
c, capacitor C
1-3With integrated package HC132(9), (10), (11), (12) pin form supervisory signal generator S
1, its frequency is adjustable continuously from 120KHz to 190KHZ, by signal generator S
1The supervisory signal of the about 150KHZ that sends is through main transformer T
1Secondary, capacitor C
7Send by ZC
1, ZC
2Live wire in the Be Controlled section that monitors, electrical appliance and having in the electric energy meter of ZCF, ZCQ, ZCC.
Copped wave diode D in the accompanying drawing 5
1, D
2, capacitor C
4-6, transformer T
2, T
3With integrated package HC132(14), (15) pin constitute to receive annunciator S
2(not receiving the 50Hz power frequency) and audio amplifier F repeatedly, collect high-frequency signal after, repeatedly audio amplifier F filters interfering frequency, and signal frequency is amplified.
Power transformer T, rectification diode D in the accompanying drawing 5
3-6, electric capacity of voltage regulation C
8, integrated package L7611 constitutes constant dc power supply device, provides DC power supply to this device, and provides standard normal electrical place value to analysis processor bh.
Integrated package L857 in the accompanying drawing 5, standard supervisory signal divider resistance R
5, R
6, fault media signal divider resistance R
3, R
4, amplifier T
11, amplifier T
11Protective resistance R
7Relay J composition analysis processor bh, its effect is judgement and the actuator that supervisory signal runs off.
Monitor ZC in the accompanying drawing 6, by capacitor C, inductance L, adjustable resistance R
1And R
2Form, its effect is can pass through the 50-60Hz industrial-frequency alternating current, but centering, high frequency supervisory signal present very high impedance, signal generator S
1In the whole live wire of the signal controlling of sending in the section of being monitored, electrical appliance, the electric energy meter.And by transferring R
1, R
2Adjust the disappearance of height, intermediate-freuqncy signal, to adjust the sensitivity of main body ZT.
Supervision rod ZCF in the accompanying drawing 7 is by two-layer conductor d
1, d
2Form conductor d with two-layer insulator
2Link to each other with the electric energy meter zero terminal through resistance R.The effect of ZCF, ZCQ, ZCC is that the Signal Spacing of launching among the main body ZT is opened, and monitors the outer electricity filching behavior of electric energy meter.
Capacitor C
7, C
9Be crosslinked electric capacity, effect is not receive the 50HZ power frequency, only receives high, intermediate-freuqncy signal.
When occurring electric shock, stealing, super consumption electricity consumption in the Be Controlled section, supervisory signal runs off, signal generator S
1The big high-frequency signal of emission measure, meanwhile signal receiver S in monitoring section
2Receive this high-frequency signal, and through repeatedly audio amplifier F amplification, through R
3, R
4After the dividing potential drop, deliver to (2) pin of L857, and the standard supervisory signal that obtains by constant dc power supply device is through R
5, R
6Dividing potential drop is delivered to L857's (3) pin, and the two relatively; If monitor sends loss of signal at L857(2) pin be a point current potential than standard supervisory signal at L857(3) when pin was the high certain value of b point current potential, L857(5) pin triggering high potential was through protective resistance R
7Deliver to amplifier T
11, T
11Drive relay J, normally closed node J
1Open, circuit is stopped power supply; But device is worked all the time, continues to send signal, does not stop as long as signal runs off, and a point current potential is higher than b point current potential all the time, continues to stop power supply; But remove above-mentioned behavior, live wire, electrical appliance, electric energy meter signal when normal condition does not run off, and a point current potential is lower than b point current potential, and L857 stops to trigger high potential, T
11, J quits work the normally closed node J of J
1Closure, circuit are recovered to send.
Carrier type electrical shock protection, anti-electricity-theft device, because the zero line multipoint earthing has prevented disconnected or be hard to tell zero line and cause the household electrical appliance burnout phenomenon because of zero line effectively, again owing to can realize household electrical appliance metal shell connecting to neutral, prevented the household electrical appliance electric leakage effectively and the indirect electric shock problem that causes; Also solved the electric shock problem between live wire and the zero line; Can carry out cascade protection, protections at different levels are not disturbed mutually, so the easy-to-search fault point, the power failure scope is little, and the time is short, the power supply reliability height; Be applicable to the cable system of neutral ground, the insulation of earth-free, zero line, overhead system.Also, can prevent stealing effectively because this device is not with pilot wire.
The embodiment of carrier type electrical shock protection, anti-electricity-theft device can implement in conjunction with aforementioned.
Claims (2)
1, a kind of carrier type electrical shock protection, anti-electricity-theft device of installing in the control section that live wire, electrical appliance, electric energy meter are formed is characterized in that by A. signal generator (S
1), signal receiver (S
2), frequency selective amplifier (F), analyzing and processing machine (bh), constant dc power supply device (AL) and monitor (ZC
1) composition main body (ZT);
A. monitor (the ZC in the main body ZT
1) connect with control section head end live wire, monitor (ZC
2) with the terminal live wire of control section or control section head end zero line connect, ammeter live wire porch live wire and the inner conductor (d that monitors excellent (ZCF)
1) after the resistance R series connection, be connected on ammeter live wire inlet terminal, and ladder connects interior electric shock (ZCQ) on this terminal, makes the supervisory signal generator (S in the main body (ZT)
1) signal controlling sent is in the section of being monitored, and running status in only controlled section of its supervisory signal amplitude of sending;
B. main body (ZT) is interior with signal receiver (S
2) and signal amplifier F be one and supervisory signal generator (S
1) in parallel after crosslinked electric capacity (C
7) ladder is connected to monitor (ZC
1) terminal and Be Controlled section live wire head end connection place, make signal generator (S
1) running status and the signal amplitude that sends is directly received signal receiver (S in controlled section
2) and signal amplifier F amplifies after the series resistance (R in the analysis processor (bh)
3, R
4), provide the running status current potential to analysis processor bh;
C. the constant dc power supply device of full-wave rectification (ZL) is connected in parallel on Be Controlled section head end Switching Power Supply side in main body, makes the signal generator (S of constant dc output parallel connection
1), signal receiver (S
2) and amplifier (F), analysis processor bh continue to provide working power, therefore can recover to send electricity automatically after removing fault, reach outside the full automatic purpose, the system standard current potential is the series resistance (R in the processor (bh) by analysis
5, R
6) providing system's current potential of standard to analysis processor (bh), this current potential and running status current potential send instruction, actuating relay (J) after relatively.
2, carrier type electrical shock protection according to claim 1, anti-electricity-theft device is characterized in that in the electric energy meter being equiped with interior contact (ZCQ) on the live wire through resistance (R), and being contained in has a guide plate (ZCC) on the zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103136 CN1020320C (en) | 1991-05-08 | 1991-05-08 | Carrier-typre device for electric shock protection and avoiding fraudulent use of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103136 CN1020320C (en) | 1991-05-08 | 1991-05-08 | Carrier-typre device for electric shock protection and avoiding fraudulent use of electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1056023A CN1056023A (en) | 1991-11-06 |
| CN1020320C true CN1020320C (en) | 1993-04-14 |
Family
ID=4905917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103136 Expired - Fee Related CN1020320C (en) | 1991-05-08 | 1991-05-08 | Carrier-typre device for electric shock protection and avoiding fraudulent use of electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020320C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435804B (en) * | 2011-10-11 | 2013-11-13 | 天津市电力公司 | Method and wireless detection module for detecting electricity stealing of wireless remote control device based on intelligent electric energy meter |
| CN104655895A (en) * | 2014-12-01 | 2015-05-27 | 国网上海市电力公司 | Micro-current inquiry power supply energy-saving protection system for watt-hour meter |
| CN106711922B (en) * | 2017-02-17 | 2018-06-08 | 中领世能（天津）科技有限公司 | Electrical shock protective device and electric power system |
| CN113644624B (en) * | 2020-05-11 | 2024-03-01 | 台达电子工业股份有限公司 | Transmission and distribution system with electric shock protection function and operation method thereof |
-
1991
- 1991-05-08 CN CN 91103136 patent/CN1020320C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1056023A (en) | 1991-11-06 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |