CN104678142A - Automatic safety warning circuit of electric energy metering box - Google Patents
Automatic safety warning circuit of electric energy metering box Download PDFInfo
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- CN104678142A CN104678142A CN201510118395.XA CN201510118395A CN104678142A CN 104678142 A CN104678142 A CN 104678142A CN 201510118395 A CN201510118395 A CN 201510118395A CN 104678142 A CN104678142 A CN 104678142A
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Abstract
The invention relates to an automatic safety warning circuit of an electric energy metering box. One input end of a bridge-type rectifying circuit is connected with a neutral line of a power supply, and the other input end of the bridge-type rectifying circuit is connected with a metering box body; an anode of the bridge-type rectifying circuit is connected with one end of each of a resistor R2, a resistor R4, a resistor R5 and a buzzer, and the anode of the bridge-type rectifying circuit is connected with a capacitor C2 and an anode of a light-emitting diode; a cathode of the bridge-type rectifying circuit is connected with one end of the resistor R2 and a cathode of the capacitor C2 and emitters of a triode Q1 and a triode Q2; a base of the triode Q1 is connected with the other end of the resistor R5 and a cathode of a capacitor C4; an anode of the capacitor C4 is connected with one end of a resistor R6 and a collector of the triode Q2; the other end of the resistor R6 is connected with the other end of the buzzer. The automatic safety warning circuit has the advantage and benefit that the metering box is endowed with an automatic alarm function.
Description
Technical field
The present invention relates to a kind of safety warning circuit, particularly relate to a kind of electrical energy metering tank automatic safe and to warn circuit.
Background technology
Electrical energy metering tank is mainly based on metal material, major equipment comprises casing, watt-hour meter, wire etc., it is the point in succession that enterprise powers to client, that electric energy is allotted and the basic link of measuring, due to its singularity, batch meter has also become powered operation personnel and Electricity customers everyday exposure electric power facility the most frequently.The safe reliability of measuring apparatus has listed the important content of examination of Electric Power Marketing Management in, is electric energy metrical quality management and important indicator client being continued to reliable power supply, the important content of Ye Shi power supply enterprise safety management.As the important component part of measuring apparatus, the safety of batch meter is very important.
Electrical energy metering tank occurs charged, threatens, even occur accident to equipment and personal safety, becomes the large hidden danger in power supply enterprise's safety.The main cause that batch meter is prone to accidents, be that the housing that causes in auxiliary earth loose contact situation is charged, reason is as follows:
(1) be that metering outfit is long neglected and in disrepair, auxiliary earth loose contact, due to neutral line break, affects by dust, humidity, oxidation, damaged by rats and the factor such as aging circuit, wire overload operation, insulation is destroyed, and live wire contacts with tank shell and makes batch meter housing produce voltage;
(2) zero line is because of oxidation, appearance broken string or loose contact, causes batch meter housing charged;
(3) take metal as the old measuring apparatus of shell, history is formed does not have design and installation auxiliary earthing apparatus when mounted, when zero line loose contact, live wire contact casing, causes tank shell with voltage, as resident and low-voltage-powered family etc. on outdoor bar, on wall.
The maximum potential safety hazard of electrical energy metering tank is exactly human body electrification, and main cause has following several respects:
(1) electric energy metrical working site does not possess the advantage of large-scale working site, in electricity consumption on-the-spot tour, inspection, maintenance, repair to measuring apparatus, the work such as to check meter, staff is in the state periodically repeating same work for a long time, easily the safe decline in alertness of habitual generation.
(2) electrical energy metering tank is generally in public place, is easy to be arrived by client or even child getting in contact, and most client does not possess specialty safety knowledge and standard operation ability, does not evade dangerous consciousness, lacks safe precaution measure and monitoring tool.
(3) electrical energy metering tank selecting in installation site, particularly Urban Residential District, building etc., mostly all in the corner location that light difference, visual effect are not good, there is no fixing light fixture, and affect by wetness and the more high factor of dust degree, case sight glass easily dirt is dirty, particularly checks meter make troubles to work on the spot.
Summary of the invention
The invention provides a kind of electrical energy metering tank automatic safe to warn circuit to solve the problems of the technologies described above, object is when casing occurring being charged, can carry out acousto-optic in time and alternately report to the police.
To warn circuit for reaching above-mentioned purpose electrical energy metering tank automatic safe of the present invention, bridge rectifier circuit one input termination zero-power line, another input end of bridge rectifier circuit is connected on metering casing, the positive pole of bridge rectifier circuit is connected with one end of resistance R2, resistance R4, resistance R5 and hummer, and the positive pole of bridge rectifier circuit is connected with electric capacity C2 and light emitting diode positive pole, the negative pole of bridge rectifier circuit is connected with one end of resistance R2, the negative pole of bridge rectifier circuit is connected with the negative pole of electric capacity C2, be connected with the emitter of triode Q1 and Q2, the base stage of triode Q1 is connected with the other end of resistance R5, the base stage of triode Q1 is connected with the negative pole of electric capacity C4, the positive pole of electric capacity C4 is connected with the collector of one end of resistance R6 and triode Q2, the other end of resistance R6 is connected with the other end of hummer, the base stage of triode Q2 is connected with the negative pole of electric capacity C3, the positive pole of electric capacity C3 is connected with the collector of one end of resistance R5 and triode Q1, the other end of resistance R5 is connected with light emitting diode negative pole.
Resistance R1 is provided with, resistance R1 two ends shunt capacitance C1 between metering casing and bridge rectifier circuit.
Triode Q1 and triode Q2 is NPN type.
Advantageous effect of the present invention: make batch meter possess auto-alarm function.Easy to use, simple to operate, safety and stability; Be applicable to various geography and climatic environment, input cost is low, energy-conserving and environment-protective, long service life.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Electrical energy metering tank automatic safe of the present invention is warned circuit as shown in the figure, bridge rectifier circuit input end N connects zero-power line, another input end of bridge rectifier circuit L is connected on metering casing, the positive pole of bridge rectifier circuit is connected with one end of resistance R2, resistance R4, resistance R5 and hummer, and the positive pole of bridge rectifier circuit is connected with electric capacity C2 and light emitting diode positive pole, the negative pole of bridge rectifier circuit is connected with one end of resistance R2, the negative pole of bridge rectifier circuit is connected with the negative pole of electric capacity C2, be connected with the emitter of triode Q1 and Q2, the base stage of triode Q1 is connected with the other end of resistance R5, the base stage of triode Q1 is connected with the negative pole of electric capacity C4, the positive pole of electric capacity C4 is connected with the collector of one end of resistance R6 and triode Q2, the other end of resistance R6 is connected with the other end of hummer, the base stage of triode Q2 is connected with the negative pole of electric capacity C3, the positive pole of electric capacity C3 is connected with the collector of one end of resistance R5 and triode Q1, the other end of resistance R5 is connected with light emitting diode negative pole.Triode Q1 and triode Q2 is NPN type.
Resistance R1 is provided with, resistance R1 two ends shunt capacitance C1 between metering casing and bridge rectifier circuit.
Analog voltage of the present invention is 36-250V, through the bridge rectifier circuit that diode D1-D4 forms, again after resistance R2, electric capacity C2 carry out filtering, monostable circuit is formed by triode Q1, triode Q2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C3 and electric capacity C4, under casing electriferous state, light emitting diode LED and hummer HA is made alternately to send sound and light alarm.
Claims (3)
1. electrical energy metering tank automatic safe is warned circuit, it is characterized in that bridge rectifier circuit one input termination zero-power line, another input end of bridge rectifier circuit is connected on metering casing, the positive pole of bridge rectifier circuit is connected with one end of resistance R2, resistance R4, resistance R5 and hummer, and the positive pole of bridge rectifier circuit is connected with electric capacity C2 and light emitting diode positive pole, the negative pole of bridge rectifier circuit is connected with one end of resistance R2, the negative pole of bridge rectifier circuit is connected with the negative pole of electric capacity C2, be connected with the emitter of triode Q1 and triode Q2, the base stage of triode Q1 is connected with the other end of resistance R5, the base stage of triode Q1 is connected with the negative pole of electric capacity C4, the positive pole of electric capacity C4 is connected with the collector of one end of resistance R6 and triode Q2, the other end of resistance R6 is connected with the other end of hummer, the base stage of triode Q2 is connected with the negative pole of electric capacity C3, the positive pole of electric capacity C3 is connected with the collector of one end of resistance R5 and triode Q1, the other end of resistance R5 is connected with light emitting diode negative pole.
2. electrical energy metering tank automatic safe according to claim 1 is warned circuit, it is characterized in that being provided with resistance R1, resistance R1 two ends shunt capacitance C1 between metering casing and bridge rectifier circuit.
3. electrical energy metering tank automatic safe according to claim 1 is warned circuit, it is characterized in that triode Q1 and triode Q2 is NPN type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510118395.XA CN104678142A (en) | 2015-03-18 | 2015-03-18 | Automatic safety warning circuit of electric energy metering box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510118395.XA CN104678142A (en) | 2015-03-18 | 2015-03-18 | Automatic safety warning circuit of electric energy metering box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104678142A true CN104678142A (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510118395.XA Pending CN104678142A (en) | 2015-03-18 | 2015-03-18 | Automatic safety warning circuit of electric energy metering box |
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| CN (1) | CN104678142A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558245A (en) * | 2004-01-19 | 2004-12-29 | 谭启仁 | Resistance-capacitance step down earth wire electrification detecting device universal for electric appliances |
| CN2741251Y (en) * | 2004-07-13 | 2005-11-16 | 张英会 | Over hot alarming device of bus joint |
| CN202230126U (en) * | 2011-10-15 | 2012-05-23 | 四川蓝讯宝迩电子科技有限公司 | Middle-high voltage electrification indicating circuit with good rectification effect |
| CN202794311U (en) * | 2012-08-01 | 2013-03-13 | 中国石油化工股份有限公司 | Voice alarm device for current leakage of electrical equipment |
| CN103176093A (en) * | 2011-12-23 | 2013-06-26 | 海洋王照明科技股份有限公司 | Leakage detection circuit |
| CN204065189U (en) * | 2014-07-28 | 2014-12-31 | 国家电网公司 | Leakage-current alarm type ammeter box |
| CN204462219U (en) * | 2015-03-18 | 2015-07-08 | 国网辽宁省电力有限公司丹东供电公司 | Electrical energy metering tank automatic safe is warned circuit |
-
2015
- 2015-03-18 CN CN201510118395.XA patent/CN104678142A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558245A (en) * | 2004-01-19 | 2004-12-29 | 谭启仁 | Resistance-capacitance step down earth wire electrification detecting device universal for electric appliances |
| CN2741251Y (en) * | 2004-07-13 | 2005-11-16 | 张英会 | Over hot alarming device of bus joint |
| CN202230126U (en) * | 2011-10-15 | 2012-05-23 | 四川蓝讯宝迩电子科技有限公司 | Middle-high voltage electrification indicating circuit with good rectification effect |
| CN103176093A (en) * | 2011-12-23 | 2013-06-26 | 海洋王照明科技股份有限公司 | Leakage detection circuit |
| CN202794311U (en) * | 2012-08-01 | 2013-03-13 | 中国石油化工股份有限公司 | Voice alarm device for current leakage of electrical equipment |
| CN204065189U (en) * | 2014-07-28 | 2014-12-31 | 国家电网公司 | Leakage-current alarm type ammeter box |
| CN204462219U (en) * | 2015-03-18 | 2015-07-08 | 国网辽宁省电力有限公司丹东供电公司 | Electrical energy metering tank automatic safe is warned circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |