CN109188201A - A method of safely and fast searching public lighting circuit failure - Google Patents
A method of safely and fast searching public lighting circuit failure Download PDFInfo
- Publication number
- CN109188201A CN109188201A CN201811015251.1A CN201811015251A CN109188201A CN 109188201 A CN109188201 A CN 109188201A CN 201811015251 A CN201811015251 A CN 201811015251A CN 109188201 A CN109188201 A CN 109188201A
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- phase
- cable
- failure
- zero
- sequence current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a kind of methods for safely and fast searching public lighting circuit failure, include the following steps；The size of serial capacitance is selected according to the radius of electricity supply of street lamp branch trouble cable and the property of lamps and lanterns；Go out series connection suitable capacity capacitor in phase cable in A, B, C three-phase respectively and then judges earth fault in N phase, then voltage is added between any phase of A, B, C and N phase if it find that zero-sequence current all exists in the zero-sequence current that power distribution cabinet measures outlet failure cable；If it find that just there is zero-sequence current in any phase of A, B, C, then judge earth fault in the phase, voltage be just added in failure phase in N phase, high-precision clamp on amperemeter measures the zero-sequence current of cable A, B, C and N phase at lamp stand, according to the catastrophe point of zero-sequence current, earth fault be can determine whether between any two bars or lamp stand draws on online, the method for more safely and fast searching public lighting circuit ground fault can be used in the lamp stand of most of normal diameter.
Description
Technical field
The present invention relates to a kind of method for searching line fault, in particular to a kind of public lighting circuit of safely and fast searching connects
The method of earth fault.
Background technique
After public lighting circuit installs earth leakage protective, route one is faulty, and earth leakage protective will act in time, now most of to need
Line fault to be processed is no longer that previous be similar to is directly grounded apparent failure, measures D.C. resistance by multimeter
Method is difficult to find public lighting circuit fault point, needs further to explore new safely and effectively method.Thus it is proposed that one
The method that kind can safely, quickly search public lighting circuit failure.
Summary of the invention
The purpose of the present invention is to provide a kind of method for safely and fast searching public lighting circuit failure, have relatively safety fast
The method of the lookup public lighting circuit ground fault of speed, the advantages of the lamp stand of most of normal diameter can use, to solve
The problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: a kind of safely and fast search public lighting circuit failure
Method includes the following steps；
S1: the size of serial capacitance is selected according to the failure cable radius of electricity supply of street lamp branch and the property of lamps and lanterns；
S2: if lamps and lanterns are high-pressure sodium lamps, the junction style for 1~5 50 μ F capacitor parallel connection that can connect in failure cable；
S3: if it is LED light, can connect 1~3 12 μ F capacitors series connection or the capacitor of 1~2 6 μ F in failure cable
Concatenated junction style；
S4: in the zero-sequence current of power distribution cabinet branch trouble cable measurement A, B, C and N phase, it is known that the total leakage of whole branch
Electric current is much, while observing and changing cable position in searching failure process and may cause the prominent of zero-sequence current if any stirring
Become, finds the recessive ground fault of cable in time；
S5: by division monopole air switch, the capacitor of suitable capacity in series loop is selected, failure phase cable will be added in
Voltage control in 50V hereinafter, measure the zero-sequence current of A, B, C and N phase at lamp stand with high-precision clamp on amperemeter, according to
The catastrophe point of zero-sequence current judges that earth fault is drawn on online between which two bar or in lamp stand.
Preferably, according to branch circuit load size in step 2, the capacitor of 1QF~3QF parallel connection different capabilities is closed or disconnects,
To change the size for sealing in circuit total capacitance.
Preferably, according to the size of branch circuit load in step 3, division 1QF, 2QF seal in the capacitor of different capabilities to adjust,
To change the size for sealing in circuit total capacitance.
Preferably, the voltage of the failure cable in step 2 and step 3 is controlled in 50v or less.
Preferably, a clamp on amperemeter is put in step 4 at power distribution cabinet outlet cable, checks the change of zero-sequence current at any time
Change, so that other people change cable position and may cause the mutation of zero-sequence current if any stirring in searching failure process, in time
It was found that the recessive ground fault of cable.
Preferably, go out series connection suitable capacity capacitor in phase cable in A, B, C three-phase respectively and measure outlet event in power distribution cabinet
The zero-sequence current for hindering cable, if it find that zero-sequence current all exists, then judge earth fault in N phase, then voltage be added in A,
B, between any phase of C and N phase；If it find that just there is zero-sequence current in any phase of A, B, C, then judge earth fault at this
Xiang Shang, voltage be just added in failure phase in N phase.
Preferably, the zero-sequence current for measuring A, B, C and N phase in step 5 at lamp stand with high-precision clamp on amperemeter, according to
The catastrophe point of zero-sequence current judges that earth fault is drawn on online between which two bar or in lamp stand.
Compared with prior art, the beneficial effects of the present invention are:
The method that safety quickly searches public lighting circuit failure, according to the size and property of load, selection seals in failure electricity
The capacity of capacitor in cable controls the voltage for being added in failure cable in 50V or less, it is ensured that search the safety of failure process；
By the zero-sequence current of A, B, C and N phase at measurement lamp stand, the catastrophe point of zero-sequence current is searched, can determine whether fault point in any two bars
Between or lamp stand draw on online, it is not necessary to dismantle cable and carry out insulation measurement or the measurement of D.C. resistance, there is rapidity, so should
Method is a kind of method for more safely and fast searching public lighting circuit ground fault, is ok in the lamp stand of most of normal diameter
It uses.
Detailed description of the invention
Fig. 1 is high-pressure sodium lamp schematic diagram of the invention；
Fig. 2 is serial capacitance schematic diagram of the invention；
Fig. 3 is series capacitance detection principle diagram in high-pressure sodium lamp cable loop of the invention；
Fig. 4 is series capacitance detection principle diagram one in LED light cable loop of the invention；
Fig. 5 is series capacitance detection principle diagram two in LED light cable loop of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear；It is complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A method of public lighting circuit failure is safely and fast searched, is included the following steps；
Referring to Fig. 1, according to the principle of lamps and lanterns, since trigger is in 50V AC low-tension, lamp do not have it is bright, trigger a,
B, the resistance between c is very big, through testing, influence of the resistance value and inductance of cable to load also very little, on measurement result influence compared with
It is greatly exactly the capacitor on lamps and lanterns, so only drawing lamps and lanterns capacitor, schematic diagram is substantially the total capacitance concatenated when measurement such as Fig. 2, C,
C1~Cn refers to the capacitor on lamps and lanterns.The serial capacitance between alternating current 220V and outlet cable, capacitance is bigger, is added in outlet cable
On voltage it is higher, there is a principle exactly lamps and lanterns cannot be allowed light, otherwise will affect the judgement of fault point.
Step 1: the big of serial capacitance is selected according to the failure cable radius of electricity supply of street lamp branch and the property of lamps and lanterns
It is small；
Step 2: referring to Fig. 3, if lamps and lanterns are high-pressure sodium lamps, can connect 1~5 50 μ F capacitor in failure cable
Junction style in parallel closes or disconnects the capacitor of 1QF~3QF parallel connection different capabilities according to branch circuit load size, to change
Become the size for sealing in circuit total capacitance, controls the voltage for being added in failure cable in 50v or less；
Step 3: please referring to Fig. 4-5, and if it is LED light, can connect 1~3 12 μ F capacitors series connection in failure cable
Or the concatenated junction style of capacitor of 1~2 6 μ F, division 1QF, 2QF seal in the capacitor of different capabilities to adjust, and make to be added in event
The voltage for hindering cable is controlled in 50v or less；
Step 4: in the zero-sequence current of power distribution cabinet branch trouble cable measurement A, B, C and N phase, it is known that whole branch is total
Leakage current is much, at the same observe search failure process in if any stir change cable position may cause zero-sequence current
Mutation finds the recessive ground fault of cable in time, and when voltage is added in failure cable A, B, C three-phase, discovery zero-sequence current is all deposited
Earth fault is then being judged in N phase, and voltage can load in any phase of A, B, C and N phase when searching failure, if failure
It is mutually A, B, C any phase therein, then voltage is added in failure phase and N phase.
If after sealing in the device, the fuse or monopole of device are spaced apart to trip immediately, illustrate that loop current is more than 10A,
Fault point is obvious, it is contemplated that in power failure, checks failure with multimeter；If situation is normal after sealing in the device,
By concatenating branch cable difference phase, the numerical value of zero-sequence current table is checked, judgement is that there are ground faults for the cable of which phase；
Step 5: by division monopole air switch, the capacitor of suitable capacity in series loop is selected, failure phase will be added in
The voltage of cable is controlled in 50V hereinafter, measure the zero-sequence current of A, B, C and N phase at lamp stand with high-precision clamp on amperemeter,
According to the catastrophe point of zero-sequence current, judge that earth fault is drawn on online between which two bar or in lamp stand.
In conclusion the method that safety quickly searches public lighting circuit failure, conjunction of connecting in failure cable circuit
The capacitor of suitable capacity controls the voltage being added on failure cable in 50V hereinafter, measuring ABCN zero-sequence current at lamp stand, looks for
The catastrophe point of zero-sequence current out is a kind of lookup public lighting circuit ground connection of comparison safely and fast to judge the position of fault point
The method of failure can be used in the lamp stand of most of normal diameter.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of method for safely and fast searching public lighting circuit failure, which is characterized in that include the following steps；
S1: the size of serial capacitance is selected according to the failure cable radius of electricity supply of street lamp branch and the property of lamps and lanterns；
S2: if lamps and lanterns are high-pressure sodium lamps, the junction style for 1~5 50 μ F capacitor parallel connection that can connect in failure cable；
S3: if it is LED light, can connect 1~3 12 μ F capacitors series connection or the capacitor series connection of 1~2 6 μ F in failure cable
Junction style；
S4: in the zero-sequence current of power distribution cabinet branch trouble cable measurement A, B, C and N phase, it is known that the total leakage current of whole branch
It is much, while observes and changing cable position in searching failure process and may cause the mutation of zero-sequence current if any stirring, and
The recessive ground fault of Shi Faxian cable；
S5: by division monopole air switch, the capacitor of suitable capacity in series loop is selected, the electricity of failure phase cable will be added in
Voltage-controlled system is in 50V hereinafter, the zero-sequence current of A, B, C and N phase is measured at lamp stand with high-precision clamp on amperemeter, according to zero sequence electricity
The catastrophe point of stream judges that earth fault is drawn on online between which two bar or in lamp stand.
2. a kind of method for safely and fast searching public lighting circuit failure according to claim 1, it is characterised in that: step 2
Middle to close or disconnect the capacitor of 1QF~3QF parallel connection different capabilities according to branch circuit load size, to change, to seal in circuit always electric
The size of appearance.
3. a kind of method for safely and fast searching public lighting circuit failure according to claim 1, it is characterised in that: step 3
The middle size according to branch circuit load, division 1QF, 2QF seal in the capacitor of different capabilities to adjust, to change, to seal in circuit always electric
The size of appearance.
4. a kind of method for safely and fast searching public lighting circuit failure according to claim 1, it is characterised in that: step 2
It controls with the voltage for being added in failure cable in step 3 in 50v or less.
5. a kind of method for safely and fast searching public lighting circuit failure according to claim 1, it is characterised in that: step 4
In a clamp on amperemeter is put at power distribution cabinet outlet cable, check the variation of zero-sequence current, at any time to find other in time
People's hidden failure point that may be present when stirring cable when searching failure.
6. a kind of method for safely and fast searching public lighting circuit failure according to claim 1, it is characterised in that: exist respectively
A, B, C three-phase go out series connection suitable capacity capacitor in phase cable and measure the zero-sequence current of outlet failure cable in power distribution cabinet, if
It was found that zero-sequence current all exists, then earth fault is judged in N phase, then voltage is added between any phase of A, B, C and N phase；Such as
In any phase of A, B, C just there is zero-sequence current in fruit discovery, then judge earth fault in the phase, voltage be just added in failure phase with
In N phase, the zero-sequence current of cable A, B, C and N phase is then measured at lamp stand with high-precision clamp on amperemeter, according to zero-sequence current
Catastrophe point, can determine whether earth fault between any two bars or lamp stand draw on online.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811015251.1A CN109188201B (en) | 2018-08-31 | 2018-08-31 | Method for safely and quickly searching street lamp line fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811015251.1A CN109188201B (en) | 2018-08-31 | 2018-08-31 | Method for safely and quickly searching street lamp line fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109188201A true CN109188201A (en) | 2019-01-11 |
| CN109188201B CN109188201B (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811015251.1A Active CN109188201B (en) | 2018-08-31 | 2018-08-31 | Method for safely and quickly searching street lamp line fault |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575857A (en) * | 2022-12-08 | 2023-01-06 | 江西广凯新能源股份有限公司 | Emergency protection method and device for high-voltage wire breakage |
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| CN2812494Y (en) * | 2005-06-29 | 2006-08-30 | 西安电子科技大学 | Intelligent real-time cold test apparatus for fault of street lamp |
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| CN101133685A (en) * | 2005-01-19 | 2008-02-27 | O.C.E.M.股份公司 | A method for detecting and locating a ground failure in an electrical line |
| CN2812494Y (en) * | 2005-06-29 | 2006-08-30 | 西安电子科技大学 | Intelligent real-time cold test apparatus for fault of street lamp |
| CN202888794U (en) * | 2012-10-31 | 2013-04-17 | 杭州瑞琦信息技术有限公司 | Electric leakage protection device working based on Internet of Things of street lamp for lamp post of street lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575857A (en) * | 2022-12-08 | 2023-01-06 | 江西广凯新能源股份有限公司 | Emergency protection method and device for high-voltage wire breakage |
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| Publication number | Publication date |
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| CN109188201B (en) | 2020-06-26 |
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Effective date of registration: 20220620 Address after: 362299 No. 931, Century Avenue, Meishan community, Meiling street, Jinjiang City, Quanzhou City, Fujian Province Patentee after: JINJIANG YIZHONG LIGHTING DEVELOPMENT Co.,Ltd. Address before: 362200 No. 679, Shiji Avenue, Jinjiang City, Quanzhou City, Fujian Province Patentee before: Zeng Jianzhong |
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