CN107942129A - Creepage detection method - Google Patents
Creepage detection method Download PDFInfo
- Publication number
- CN107942129A CN107942129A CN201710942729.4A CN201710942729A CN107942129A CN 107942129 A CN107942129 A CN 107942129A CN 201710942729 A CN201710942729 A CN 201710942729A CN 107942129 A CN107942129 A CN 107942129A
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- CN
- China
- Prior art keywords
- zero curve
- firewire
- detection method
- leakage current
- current
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
Abstract
The present invention relates to a kind of creepage detection method, and in particular to a kind of simply and easily creepage detection method, can accurately detect leakage current condition.Creepage detection method, comprises the following steps：A, in real time measurement firewire and zero curve electric current, meet two current values differ, and be 0 under conditions of, disconnect zero curve；B, after disconnecting zero curve, when the firewire electric current measured is not 0, judge that current is leakage current condition.The present invention has the following advantages and effect：1st, the present invention need not change hardware design, without adding any detection device, can accurately judge leakage current condition, solve the problems, such as that power office cannot distinguish between bypass stealing and leakage current；In the case of stealing detection function is not changed, user's legitimate rights and interests are not only ensure that, improve electricity consumption satisfaction, and reduce the maintenance management cost of power office to a certain extent.2nd, the present invention can accurately judge to bypass stealing state, and timely processing, avoid national wealth from losing.
Description
Technical field
The present invention relates to a kind of creepage detection method, is mainly used in intelligent electric meter industry.
Background technology
Single-phase meter has a variety of anti-electricity-theft requirements, and in practical application, due to subscriber cable or electric appliance aging, part circuit connects
Ground or ground resistance diminish, and cause have electric current to flow into the earth, that is, produce leakage current (as shown in Figure 3).Leakage current can cause firewire
Inflow current and zero curve outflow electric current are unequal, meet bypass Rule of judgment, can be judged to stealing by ammeter, and carry out the phase such as operate a switch
Thief-proof electrically operated, and actual user's not stealing is answered, so as to cause customer complaint, power office is without effectively detection and area at present
Departure section.
Therefore leakage current such case, manages single-phase resident's normal electricity consumption to power office and produces very big puzzlement, not only
Cause customer complaint, reduce electricity consumption satisfaction, and manually investigation will produce the expenses such as cost of labor.
The content of the invention
It is an object of the invention to overcome above-mentioned problem, there is provided a kind of simply and easily creepage detection method,
Leakage current condition can accurately be detected.
The purpose of the present invention is by following technical solution to complete,
Creepage detection method, comprises the following steps：
A, in real time measurement firewire and zero curve electric current, meet two current values differ, and be 0 under conditions of, disconnect
Zero curve；
B, after disconnecting zero curve, when the firewire electric current measured is not 0, judge that current is leakage current condition.
Preferably, the creepage detection method further includes：
C, by step B, the firewire current value under leakage current condition is stored as leakage current value, then closes zero curve
Normal electricity consumption, and the current value of firewire and zero curve is measured in real time, if the difference of two electric currents is not equal to the leakage current value, perform
Step A.
Preferably, the creepage detection method further includes：
D, after disconnecting zero curve, when the firewire electric current measured is 0, judge that current is bypass condition；And firewire is disconnected, stop
Only customer power supply.
The disconnection of the zero curve is realized by the zero curve relay being arranged on zero curve.
The closure of the zero curve is realized by the zero curve relay being arranged on zero curve.
The present invention has the following advantages compared with prior art and effect：1st, the present invention need not change hardware design, without adding
Add any detection device, can accurately judge leakage current condition, solve power office and cannot distinguish between bypass stealing and leakage current
Problem；In the case of stealing detection function is not changed, user's legitimate rights and interests are not only ensure that, improve electricity consumption satisfaction, and
Reduce the maintenance management cost of power office to a certain extent.2nd, the present invention can accurately judge to bypass stealing state, and in time
Processing, avoids national wealth from losing.
Brief description of the drawings
Fig. 1 is the circuit diagram under normal electricity consumption state of the present invention.
Fig. 2 is that the present invention occurs to bypass the circuit diagram under stealing state.
Fig. 3 is the circuit diagram under present invention generation leakage current condition.
Fig. 4 is that the present invention disconnects the circuit diagram after zero curve.
The flow chart of Fig. 5 detection methods.
Embodiment
Detailed introduction is done to the present invention below in conjunction with attached drawing.
The present invention is using the metering of single-phase meter two-way and two-way relay control characteristic, with reference to the Production conditions and meter of leakage current
Measure function, it is proposed that a kind of creepage detection method.
In the case of normal electricity consumption, ammeter measures firewire electric current and neutral line current is equal (as shown in Figure 1).Work as generation
When bypassing stealing (such as Fig. 2) or leakage current (such as Fig. 3), both can be caused unequal, and not be 0.The present embodiment passes through following
Method is detected and distinguishes (as shown in Figure 5)：
A, ammeter measures firewire and neutral line current in real time, when detecting that two size of current are unequal, and when not being 0, then
Zero curve relay 1 (such as Fig. 4) is disconnected, firewire relay 2 is kept closed；
B, after zero curve relay 1 disconnects, if it is not 0 to measure firewire size of current, i.e. firewire still has electric current to flow through, then
Judge that current is leakage current condition.Hardware design need not be changed, without adding any detection device, can accurately judge leakage current
State, solves the problems, such as that power office cannot distinguish between bypass stealing and leakage current.
Preferably, after leakage current condition is determined as, ammeter shows corresponding designated symbol prompting user and power office
Leakage current condition is currently at, and the firewire current value under leakage current condition is stored as leakage current value, is then closed
1 normal electricity consumption of zero curve relay, and the current value of firewire and zero curve is measured in real time, if the difference of two electric currents is not equal to the electric leakage
Flow valuve, then perform step A.So as to according to electric current real-time change, real-time update current state, it is ensured that state judges accurate
Property and real-time.
Preferably, in step B, after zero curve relay 1 disconnects, if measuring firewire size of current as 0, i.e., firewire has been
Flowed through through no electric current, then judge currently to show corresponding designator number (prompting user and power office for bypass stealing state, ammeter
It is currently at bypass stealing state) and record bypass event, and firewire relay 2 is disconnected, stop customer power supply.Removing stealing
After event, ability closing relay continues electricity consumption, and performs step A.
Claims (5)
1. a kind of creepage detection method, it is characterised in that comprise the following steps：
A, in real time measurement firewire and zero curve electric current, meet two current values differ, and be 0 under conditions of, disconnect zero curve；
B, after disconnecting zero curve, when the firewire electric current measured is not 0, judge that current is leakage current condition.
2. creepage detection method according to claim 1, it is characterised in that further include：
C, by step B, the firewire current value under leakage current condition is stored as leakage current value, and it is normal then to close zero curve
Electricity consumption, and the current value of firewire and zero curve is measured in real time, if the difference of two electric currents is not equal to the leakage current value, perform step
A。
3. creepage detection method according to claim 1, it is characterised in that further include：
D, after disconnecting zero curve, when the firewire electric current measured is 0, judge that current is bypass condition；And firewire is disconnected, stop using
Family powers.
4. creepage detection method according to claim 1, it is characterised in that：The disconnection of the zero curve is by being arranged at zero
Zero curve relay on line（1）Realize.
5. creepage detection method according to claim 5, it is characterised in that：The closure of the zero curve is by being arranged at zero
Zero curve relay on line（1）Realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942729.4A CN107942129A (en) | 2017-10-11 | 2017-10-11 | Creepage detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942729.4A CN107942129A (en) | 2017-10-11 | 2017-10-11 | Creepage detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107942129A true CN107942129A (en) | 2018-04-20 |
Family
ID=61936161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710942729.4A Pending CN107942129A (en) | 2017-10-11 | 2017-10-11 | Creepage detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107942129A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474514A (en) * | 2020-06-28 | 2020-07-31 | 国网江西综合能源服务有限公司 | Analysis method for discovering wiring leakage by using intelligent meter zero-live wire current |
| CN114002469A (en) * | 2021-11-03 | 2022-02-01 | 国网四川省电力公司成都供电公司 | Electricity stealing detection method and device and electricity stealing detector |
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| CN2247816Y (en) * | 1996-04-20 | 1997-02-19 | 林耀基 | Single phase electric energy meter capable of avoiding fraudulent use of power |
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| CN2038244U (en) * | 1988-07-09 | 1989-05-24 | 万克勤 | Electricity saving electric meter with the function of electricity-theft-proof |
| CN2060891U (en) * | 1989-08-12 | 1990-08-22 | 王富元 | Multi-function device for preventing theft of electricity |
| CN2247816Y (en) * | 1996-04-20 | 1997-02-19 | 林耀基 | Single phase electric energy meter capable of avoiding fraudulent use of power |
| CN1747271A (en) * | 2005-08-26 | 2006-03-15 | 李明 | Protector of leakage and electricity steal |
| CN102346208A (en) * | 2010-07-30 | 2012-02-08 | 上海资和通信科技有限公司 | Electricity steal-resistant system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474514A (en) * | 2020-06-28 | 2020-07-31 | 国网江西综合能源服务有限公司 | Analysis method for discovering wiring leakage by using intelligent meter zero-live wire current |
| CN111474514B (en) * | 2020-06-28 | 2020-12-08 | 国网江西综合能源服务有限公司 | Analysis method for discovering wiring leakage by using intelligent meter zero-live wire current |
| CN114002469A (en) * | 2021-11-03 | 2022-02-01 | 国网四川省电力公司成都供电公司 | Electricity stealing detection method and device and electricity stealing detector |
| CN114002469B (en) * | 2021-11-03 | 2023-10-03 | 国网四川省电力公司成都供电公司 | Method and device for detecting electricity theft and electricity theft detector |
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Application publication date: 20180420 |