CN201177641Y - Secondary circuit wiring checking system - Google Patents

Secondary circuit wiring checking system Download PDF

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Publication number
CN201177641Y
CN201177641Y CNU2008200342085U CN200820034208U CN201177641Y CN 201177641 Y CN201177641 Y CN 201177641Y CN U2008200342085 U CNU2008200342085 U CN U2008200342085U CN 200820034208 U CN200820034208 U CN 200820034208U CN 201177641 Y CN201177641 Y CN 201177641Y
Authority
CN
China
Prior art keywords
current
lead
secondary circuit
current transformer
secondary loop
Prior art date
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.)
Expired - Lifetime
Application number
CNU2008200342085U
Other languages
Chinese (zh)
Inventor
袁红梅
朱厚元
周玉
马春秀
孙笠文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Zhenjiang Power Supply Co of Jiangsu Electric Power Co
Original Assignee
Zhenjiang Power Supply Co of Jiangsu Electric Power Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhenjiang Power Supply Co of Jiangsu Electric Power Co filed Critical Zhenjiang Power Supply Co of Jiangsu Electric Power Co
Priority to CNU2008200342085U priority Critical patent/CN201177641Y/en
Application granted granted Critical
Publication of CN201177641Y publication Critical patent/CN201177641Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model belongs to an operation inspection device of a power transmission and distribution circuit and relates to a secondary loop wiring inspection system for inspecting and determining the wiring condition of a secondary loop of a power transmission and distribution system. The inspection system comprises a current mutual inductor for inducing current in a primary loop, wherein the extraction wire of the current mutual inductor is connected with a meter of the secondary loop; the system further includes an annular winding frame; a segment of detection wire is wound on the outer circumference of the annular frame by at least two rounds; and the detection wire is connected between the extraction wire of the current mutual inductor and the meter through the both ends thereof. The secondary loop wiring inspection system can inspect and determine the wiring condition of the secondary loop of the power transmission and distribution system in an idle state.

Description

Secondary circuit wiring check system
Technical field
The utility model belongs to the rolling inspection device of electric line, relates to one and is used for secondary circuit wiring check system that electrical power trans mission/distribution system secondary circuit wiring situation is checked, judged.
Background technology
The secondary circuit of electrical power trans mission/distribution system comprises aut.eq., gauge tap, equipment such as measurement instrument, electric energy metrical.The effect of secondary circuit equipment is by the supervision to the high pressure primary circuit, measures the duty that reflects the primary circuit, and the control primary system.When primary system broke down, automatic safety device can be reported to the police phenomenon of the failure rapidly, removed, and guaranteed primary equipment safety, reliable, economic, reasonably operation.Therefore secondary circuit reliably, correctly extremely important, new clothes and its wiring check of improved equipment and judgement also must in time be carried out.
The wiring check of secondary circuit and judgement do not have under electricity and charged (operation) situation at equipment respectively and carry out.Inspection that it is final and judgement are that the hexagonal figure that constitutes according to the electric current and voltage vector under charged state draws a conclusion.Make hexagonal figure, need obtain the value of voltage and current, after equipment was charged, the value of voltage can satisfy at any time, but obtaining of electric current need be carried out having under the condition of actual load.The newly-built electric substation of power department, newly-built turnover line interval or equipment rehabilitation, transformer and power circuit put into operation, slave unit is subjected to electricity to need one section process to load carrying, if remake wiring check and judgement when actual load is arranged, the problem of having found remakes correction, can incur loss through delay the eliminating of fault and defective like this, also occurs beyond thought problem easily.
If the no-load current when utilizing the power circuit charging, promptly the capacitance current of circuit itself by detecting the exciting current of transformer, just can be finished the making of hexagonal figure and the wiring judgement of secondary circuit when circuit is unloaded.But the difficulty that this conception realizes is: nonloaded line and transformer current are too little, and directly value is imported instrument, and the insufficient sensitivity owing to instrument generally can not show or can not correctly show, thereby are difficult to finish when zero load the inspection and the judgement of secondary line.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of secondary circuit wiring check system that can wiring is checked and judged to the electrical power trans mission/distribution system secondary circuit under the circuit light condition is provided.
Secondary circuit wiring check of the present utility model system includes the current transformer that is used for responding to electric current in the primary circuit, the lead of drawing of current transformer is linked in the gauging table meter of secondary circuit, also include the bobbin of an annular in the system, there is one section to detect conductor loop on the excircle of ring skeleton, its around the number of turns be at least two circles, this detection lead is serially connected in current transformer by two termination and draws between lead and the gauging table meter.
The lead of drawing of described current transformer is to be linked in the gauging table meter of secondary circuit through terminal box, and two terminations of described detection lead also are connected with the lead of drawing of drawing lead and gauging table meter of current transformer respectively in terminal box.
The utility model is owing to the multi-turn detection lead that will be looped around on the ring winding skeleton is serially connected in the secondary circuit, can directly the detection lead to multi-turn detects at the bobbin place with split core type current transformer by instrument, the tested current signal that can obtain to amplify detects required signal intensity requirement thereby satisfied.
Description of drawings
Fig. 1 is the principle schematic of the utility model embodiment.
Embodiment
As shown in the figure, in the secondary circuit wiring check of the present utility model system, current transformer 1 is used for responding to the electric current of primary circuit 2, the lead of drawing of current transformer is connected with gauging table meter 4 through a terminal box 3, one section is detected lead 5 in the secondary circuit that is serially connected in current transformer 1 and gauging table meter 4 formations by terminal box 3, the stage casing of detecting lead 5 is looped around on the bobbin 6 of an annular, around the number of turns be N, constitute the toroid winding of a N number of turn.Can directly detect with split core type current transformer by instrument during use toroid winding.
The principle of work of split core type current transformer is, passes the elementary of clamp as an electric current, and just the electric current that goes out a milliampere or microampere order at the secondary induction of clamp electric current indication, power indication and the phase place of making secondary circuit for instrument shows and use.The electric current of input instrument generally reaches the 20-50 microampere, and instrument could operate as normal.The instrument that often uses is generally 1000/1 with the no-load voltage ratio of forcipated mutual-inductor at present, and calculating is got off, and the primary current of clamp that is to say that the electric current of secondary circuit must reach the 20-50 milliampere.When unloaded transmission line of electricity and unloaded transformer do not satisfy such current requirements, just can adopt the technical solution of the utility model, toroid winding that is wound with the N number of turn of serial connection in the secondary current loop, instrument is clipped on this toroid winding with the clamp of split core type current transformer.Like this, the elementary ampere turns of split core type current transformer is just extended N doubly, be equivalent to the no-load current of line transformer extended N doubly, the working current of input instrument is also along with expansion, thereby just can realize operate as normal.Get as for the N circle much, should be according to electric pressure, line footpath, line length, the wire spacing of each transmission line of electricity, the no-load voltage ratio of the no-load current summation current transformer of transformer is determined.
Below be the use-case that the utility model is applied to actual track:
Circuit one: 10KV line, power transmission line are about 300 meters, and underground cable is carried, current transformer 600/5, and secondary no-load current 2mA, after toroid winding 10 circles, use split core type current transformer enlarge 10 times with secondary current, the input instrument.
Circuit two: 35KV line, overhead transmission line are about 3000 meters, current transformer 200/5, and unloaded secondary current 5mA, toroid winding 5 circles, after no-load current enlarges 5 times, the input instrument.
Circuit three: 110KV line, overhead transmission line are about 6000 meters, current transformer 600/5, and unloaded secondary current 11mA, toroid winding 2 circles, no-load current is imported instrument after enlarging 2 times.
Circuit four: the 220KV line, overhead transmission line is about ten thousand metres, current transformer 1250/1, unloaded secondary current 2mA, toroid winding 10 circles, no-load current is imported instrument after enlarging 10 times.
Use scheme of the present utility model, more than all nonloaded lines can both obtain the circuit correlation parameter by the phase power instrument, and display voltage, electric current and phasing degree make hexagonal figure parameters needed for judging that wiring provides.

Claims (2)

1, a kind of secondary circuit wiring check system, include the current transformer (1) that is used for responding to electric current in the primary circuit, the lead of drawing of current transformer is linked in the gauging table meter (4) of secondary circuit, it is characterized in that: the bobbin (6) that also includes an annular in the system, there is one section detection lead (5) to be looped around on the excircle of ring skeleton, its around the number of turns be at least two circles, this detection lead is serially connected in current transformer by two termination and draws between lead and the gauging table meter.
2, secondary circuit wiring check according to claim 1 system, it is characterized in that: the lead of drawing of described current transformer (1) is linked in the gauging table meter (4) of secondary circuit through terminal box (3), and two terminations of described detection lead (5) also are connected with the lead of drawing of drawing lead and gauging table meter of current transformer respectively in terminal box.
CNU2008200342085U 2008-04-18 2008-04-18 Secondary circuit wiring checking system Expired - Lifetime CN201177641Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200342085U CN201177641Y (en) 2008-04-18 2008-04-18 Secondary circuit wiring checking system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200342085U CN201177641Y (en) 2008-04-18 2008-04-18 Secondary circuit wiring checking system

Publications (1)

Publication Number Publication Date
CN201177641Y true CN201177641Y (en) 2009-01-07

Family

ID=40217664

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200342085U Expired - Lifetime CN201177641Y (en) 2008-04-18 2008-04-18 Secondary circuit wiring checking system

Country Status (1)

Country Link
CN (1) CN201177641Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102565614A (en) * 2012-01-11 2012-07-11 云南电网公司 Alternating voltage loop test method
CN103176027A (en) * 2011-12-26 2013-06-26 上海电科电器科技有限公司 Connection detection method and device for secondary circuit of current detection unit
CN104064340A (en) * 2014-07-03 2014-09-24 国家电网公司 Secondary current amplification coil of current transformer
CN106841737A (en) * 2017-02-21 2017-06-13 云南电网有限责任公司 A kind of low current amplification detecting process in exchange secondary current loop
CN108872908A (en) * 2016-03-02 2018-11-23 中国人民解放军91663部队 The On line inspection method of power meter with metering interface

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103176027A (en) * 2011-12-26 2013-06-26 上海电科电器科技有限公司 Connection detection method and device for secondary circuit of current detection unit
CN103176027B (en) * 2011-12-26 2015-05-13 上海电科电器科技有限公司 Connection detection method and device for secondary circuit of current detection unit
CN102565614A (en) * 2012-01-11 2012-07-11 云南电网公司 Alternating voltage loop test method
CN102565614B (en) * 2012-01-11 2014-04-30 云南电网公司 Alternating voltage loop test method
CN104064340A (en) * 2014-07-03 2014-09-24 国家电网公司 Secondary current amplification coil of current transformer
CN108872908A (en) * 2016-03-02 2018-11-23 中国人民解放军91663部队 The On line inspection method of power meter with metering interface
CN108872908B (en) * 2016-03-02 2021-04-27 中国人民解放军91663部队 On-line checking method for power meter with metering interface
CN106841737A (en) * 2017-02-21 2017-06-13 云南电网有限责任公司 A kind of low current amplification detecting process in exchange secondary current loop

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: JIANGSU ELECTRIC POWER CO. STATE ELECTRIC NET CROP

Effective date: 20121106

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20121106

Address after: 212001 Zhenjiang City, Jiangsu Province Road No. 182

Patentee after: Zhenjiang Power Supply Company, Jiangsu Prov. Power Co.

Patentee after: Jiangsu Electric Power Company

Patentee after: State Grid Corporation of China

Address before: 212001 Zhenjiang City, Jiangsu Province Road No. 182

Patentee before: Zhenjiang Power Supply Company, Jiangsu Prov. Power Co.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20090107