CN204789879U - Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof - Google Patents
Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof Download PDFInfo
- Publication number
- CN204789879U CN204789879U CN201520356566.8U CN201520356566U CN204789879U CN 204789879 U CN204789879 U CN 204789879U CN 201520356566 U CN201520356566 U CN 201520356566U CN 204789879 U CN204789879 U CN 204789879U
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- extraction element
- voltage signal
- concentric cable
- 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.)
- Active
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The embodiment of the utility model discloses the voltage signal extraction element, it includes: shell (10) and encapsulation are in in shell (10) no. 3 group circuit branch road, wherein, every set of circuits branch road is including single phase transformer (12), the signal connection head (13) and voltage attenuator (14) of order connection, the three -phase voltage signal that can overhaul the power with the three -phase through step down with the decay after carry to the oscillograph and show respectively. And simultaneously, the embodiment of the utility model provides an it puts the test system still to disclose the electrified office of a cubical switchboard. Implement the embodiment of the utility model provides a, it examines and plays a game and put the efficiency and the precision of source phase place characteristic location can improvement office to put the signal to improve work efficiency.
Description
Technical field
The utility model belongs to intelligent grid Condition Monitoring Technology field, particularly relates to a kind of switch cabinet electrified office and puts test macro and voltage signal extraction element thereof.
Background technology
Along with the development of electrical network, the load that high-tension switch cabinet carries constantly increases, due to manufacture craft, the impact of transporting assembling and on-the-spot running environment, switch cubicle occurs that the case of insulation fault significantly increases, and this accuracy of putting detection to charged office and work efficiency are had higher requirement.But current switch cabinet electrified office puts in test, be not still equipped with corresponding synchronous voltage signal extraction element at the scene, make the phase characteristic of discharge signal be difficult to obtain, bring larger difficulty to the quick phasing of the examination of discharge signal and discharge source.
Utility model content
Technical problem to be solved in the utility model is, a kind of switch cabinet electrified office is provided to put test macro and voltage signal extraction element thereof, can when test be put in switch cabinet electrified office, can while the operation that ensures safety, improve the accuracy of device Diagnostic, improve work on the spot efficiency, save the man power and material that equipment state overhauling takes.
For solving above-mentioned technical matters, the one side of the utility model embodiment provides a kind of voltage signal extraction element, and the charged office being applied to switch cubicle puts in test, comprising:
Shell and encapsulation three groups of circuit branch in the housing, wherein, each group circuit branch comprises the single transformer, signal connector and the voltage attenuator that are linked in sequence;
Wherein, each single transformer has primary coil and secondary coil, and the phase firewire in two input leads connection three-phase maintenance power supplys of described primary coil and zero line, for carrying out step-down process to maintenance power supply;
First side of each signal connector described connects two output leads of the secondary coil of described single transformer;
One end of each voltage attenuator described is connected to by the first concentric cable on the opposite side of described signal connector, and the other end of described voltage attenuator is connected with the second concentric cable.
Wherein, described first concentric cable comprises from the inside to the outside successively: inner wire, insulation course, mesh shields layer and oversheath.
Wherein, each single transformer comprises iron core, be arranged at primary coil on iron core and secondary coil, described primary coil draws two input leads, described secondary coil draws two output leads; Described primary coil and secondary coil are provided with insulating tape and transformer case further;
An input lead in the primary coil of described three single transformers connects the N terminal of three-phase maintenance power supply, another input lead in described three single transformer primary coils connects A, B, C tri-terminals of described three-phase maintenance power supply respectively, synchronously to extract the three-phase voltage in described three-phase maintenance power supply, obtain the power-frequency voltage simulating signal of predetermined volt value through transformation.
Wherein, each signal connector described comprises: connector shell, and the contact pin be arranged in described connector shell and wire clamp, at described contact pin, between wire clamp and connector shell, be filled with insulating gel, the end of described connector shell matches to wrap up described contact pin and wire clamp with a sheath, wherein, contact pin, the wire clamp of each signal connector one end described are connected with two output leads of transformer secondary respectively, and contact pin, the wire clamp of the described signal connector other end are connected with mesh shields layer with the inner wire of the first concentric cable respectively.
Wherein, described voltage attenuator inside comprises a resistance-capacitance type voltage divider, it comprises the first resistance R, the first electric capacity C, the second resistance R and the second electric capacity C of serial connection, the first end of the first resistance R is high-pressure side, between described first electric capacity C and the second resistance R, draw low pressure end, draw the first common ground end and the second common ground end from second end of described second electric capacity C;
Wherein, described high-pressure side is connected with mesh shields layer with the inner wire of described first concentric cable respectively with the first common ground end, and described low pressure end is connected with mesh shields layer with the inner wire of described second concentric cable respectively with the second common ground end.
Wherein, the other end of described second concentric cable is connected to an oscillographic signal input part.
Wherein, described shell adopts Polyvinylchloride material.
Correspondingly, the another aspect of the utility model embodiment, additionally provides a kind of switch cabinet electrified office and puts test macro, comprising:
Aforesaid voltage signal extraction element;
Detecting sensor is put in office, and for the local discharge signal that equipment in inductive switch cabinet produces, it is by triaxial cable connection signal conditioning module;
Oscillograph, an one signal input part connects described Signal-regulated kinase by the 4th concentric cable, its another three signal input parts are connected on three voltage attenuators of described voltage signal extraction element respectively by three second concentric cable, put Partial Discharge detected by detecting sensor for showing described office respectively, and show the three-phase voltage waveform of described three-phase maintenance power supply after transformation and decay.
Implement the utility model, there is following beneficial effect:
First, due to high-voltage switch cabinet of transformer substation room can the power supply of voltage supplied signal extraction less, and electric pressure has all exceeded oscillographic range, and the utility model embodiment is by arranging a voltage signal extraction element, effectively can extract the synchronous voltage signal of transformer station 10kV/20kV bus from maintenance power supply, and by signal lossless step-down, and without phase deviation, and safe transmission is to oscillograph;
Meanwhile, by voltage signal extraction element, office put testing sensor and oscillographic with the use of, greatly can improve Partial discharge signal and to screen and play a game the efficiency and precision of putting source phase characteristic location, save the man power and material that equipment state overhauling takes;
In addition, this voltage signal extraction element portability is strong, there is operating risk little during onsite application, workable, the advantage that antijamming capability is high, application production practices will improve the accuracy of apparatus insulated diagnosis in switch cubicle greatly, and the work efficiency of defect hidden troubles removing and repair based on condition of component, and alleviate the work load of tester.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 puts the applied environment schematic diagram of test macro for a kind of switch cabinet electrified office that the utility model provides;
Fig. 2 is the structural representation of the first concentric cable of voltage signal extraction element in Fig. 1;
Fig. 3 is the single transformer schematic diagram of voltage signal extraction element in Fig. 1;
Fig. 4 is the structural representation of the signal connector of voltage signal extraction element in Fig. 1;
Fig. 5 is the structural representation of the voltage attenuator of voltage signal extraction element in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the applied environment schematic diagram of test macro is put in a kind of switch cabinet electrified office that showing the utility model provides.In this embodiment, this test macro comprises: detecting sensor 6 is put in voltage signal extraction element 1, three-phase maintenance power supply 2, oscillograph 3, Signal-regulated kinase 5 and office, wherein, three-phase maintenance power supply 2 can be gone to the station to meet somebody with becoming step-down acquisition by 10kV/20kV bus, has A, B, C, N connection terminal.
Wherein, this voltage signal extraction element 1 comprises:
Shell 10 and the three groups of circuit branch be encapsulated in described shell 10, shell can adopt Polyvinylchloride material, it has the features such as waterproof anti-aging, three groups of circuit branch can be encapsulated in the inside, easy to carry, when using at the scene, two ends connect maintenance power supply and oscillograph respectively, functionally meet the requirement that 10kV/20kV bus three-phase synchronous voltage signal can't harm safety extraction.Wherein, each group circuit branch comprises the single transformer 12, signal connector 13 and the voltage attenuator 14 that are linked in sequence;
Wherein, each single transformer 12 has primary coil 122 and secondary coil 124, and the phase firewire in two input leads connection three-phase maintenance power supplys 2 of described primary coil 122 and zero line, for carrying out step-down process to maintenance power supply;
First side of each signal connector 13 described connects two output leads of the secondary coil 124 of described single transformer 12;
One end of each voltage attenuator 14 described is connected to by the first concentric cable 7 on the opposite side of described signal connector 13, and the other end of described voltage attenuator 14 is connected with the second concentric cable 8.
Detecting sensor 6 is put in office, for the shelf depreciation on inductive switch cabinet 4, it is by triaxial cable 90 connection signal conditioning module 5, wherein, detecting sensor 6 of this Signal-regulated kinase 5 putting for playing a game detects the local discharge signal obtained and carries out amplification and filtering process, to obtain pulse signal clearly;
Oscillograph 3, an one signal input part connects described Signal-regulated kinase 5 by the 4th concentric cable 91, its another three signal input parts are connected on three voltage attenuators 14 of described voltage signal extraction element 1 by described second concentric cable 8, put Partial Discharge detected by detecting sensor 6 for showing described office respectively, and show the three-phase voltage waveform of described three-phase maintenance power supply 2 after transformation and decay.
Further, with reference to shown in Fig. 2 to Fig. 5, wherein, the structural representation of concentric cable 7 can be figure 2 illustrates.This first concentric cable 7 comprises from the inside to the outside successively: inner wire 70, insulation course 71, mesh shields layer 72 and oversheath 73; Wherein, described inner wire 70 is copper, and insulating layer material is teflon 71, and mesh shields layer 72 is copper, and oversheath 73 material is Polyvinylchloride.
Be understandable that, in this embodiment, the second concentric cable 8, triaxial cable 90, the 4th concentric cable 91 all have identical structure, do not repeat at this, can be ensured the Lossless transport of AC signal by concentric cable.
As shown in Figure 3, the configuration diagram of single transformer 12 is shown.Each single transformer 12 comprise unshakable in one's determination 120, be arranged at primary coil 122 on iron core and secondary coil 124, described primary coil 122 draws two input leads, described secondary coil 124 draws two output leads; Described primary coil 122 and secondary coil 124 are provided with insulating tape and transformer case (not shown) further; In one embodiment, the rated power of this single transformer 12 is 10W/VA, and voltage ratio is 220V/6V.
An input lead in the primary coil 122 of described three single transformers 12 connects the N terminal of three-phase maintenance power supply 2, another input lead in described three single transformer primary coils 122 connects A, B, C tri-terminals of described three-phase maintenance power supply 2 respectively, synchronously to extract the three-phase voltage (220V) in described three-phase maintenance power supply 2, obtain the power-frequency voltage simulating signal (such as transformation is to 6V) of predetermined volt value through transformation.
As shown in Figure 4, the structural representation of signal connector 13 is shown.Signal converting head 13 front end is connected with the output lead of the secondary coil 124 of single transformer 12, and rear end connects the first concentric cable 7.Each signal connector 13 described comprises: connector shell 130, and the contact pin 132 be arranged in described connector shell 130 and wire clamp 134, at described contact pin 132, insulating gel 136 is filled with between wire clamp 134 and connector shell 130, the end of described connector shell 130 matches to wrap up described contact pin 132 and wire clamp 134 with a sheath 138, wherein, contact pin 132 material is that full copper is gold-plated, insulating gel 136 is resistant to elevated temperatures Teflon, wire clamp 134 material is that full copper is silver-plated, connector shell 130 and sheath 138 material are kirsite, when understandable, above-mentioned material is non-is restriction, it is only citing.Wherein, contact pin, the wire clamp of each signal connector 13 first end described are connected with two output leads of transformer secondary respectively, and contact pin 132, the wire clamp 134 of the described signal connector other end are connected with mesh shields layer 72 with the inner wire 70 of the first concentric cable 7 respectively.
As shown in Figure 5, the structural representation of voltage attenuator 14 is shown.Each voltage attenuator 14 inside comprises a resistance-capacitance type voltage divider, comprise the first resistance R1 of serial connection, the first electric capacity C1, the second resistance R2 and the second electric capacity C2, the first end of the first resistance R1 is high-pressure side, low pressure end is drawn between described first electric capacity C1 and the second resistance R2, the first common ground end and the second common ground end is drawn from second end of described second electric capacity C2, in one embodiment, the intrinsic standoff ratio of this resistance-capacitance type voltage divider is 10:1.
Wherein, described high-pressure side and the first common ground end are connected with mesh shields layer 72 with the inner wire 70 of described first concentric cable 7 respectively, and described low pressure end is connected with mesh shields layer with the inner wire of described second concentric cable respectively with the second common ground end.
Wherein, the other end of described second concentric cable 8 is connected to an oscillographic signal input part.
Because oscillograph 3 is operated in under concentric cable Impedance matching pattern, its range is less than 6V, so place is by adopting voltage attenuator 14, the voltage signal of the 6V from signal connector can be decayed to 600mV.
Be understandable that, by voltage signal extraction element 1, transformation and attenuation processing can be carried out to the three-phase voltage signal that three-phase overhauls power supply, and every phase voltage signal is shown respectively on oscillograph 3; Simultaneously, switch cabinet electrified Partial discharge signal that detecting sensor 6 tests will be put after the process of Signal-regulated kinase 5 by office, also show on oscillograph 3, thus can this test to signal waveform and three-phase voltage signal directly contrast, thus can obtain easily and screen out the phase characteristic of local discharge signal on switch cubicle.
Implement the utility model, there is following beneficial effect:
First, due to high-voltage switch cabinet of transformer substation room can the power supply of voltage supplied signal extraction less, and electric pressure has all exceeded oscillographic range, and the utility model embodiment is by arranging a voltage signal extraction element, effectively can extract the synchronous voltage signal of transformer station 10kV/20kV bus from maintenance power supply, and by signal lossless step-down, and without phase deviation, and safe transmission is to oscillograph;
Meanwhile, by voltage signal extraction element, office put testing sensor and oscillographic with the use of, greatly can improve Partial discharge signal and to screen and play a game the efficiency and precision of putting source phase characteristic location, save the man power and material that equipment state overhauling takes;
In addition, this voltage signal extraction element portability is strong, there is operating risk little during onsite application, workable, the advantage that antijamming capability is high, application production practices will improve the accuracy of apparatus insulated diagnosis in switch cubicle greatly, and the work efficiency of defect hidden troubles removing and repair based on condition of component, and alleviate the work load of tester.
Above disclosedly be only a kind of preferred embodiment of the utility model, certainly can not limit the interest field of the utility model with this, therefore according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (8)
1. a voltage signal extraction element, the charged office being applied to switch cubicle puts in test, it is characterized in that, comprising:
Shell (10) and the three groups of circuit branch be encapsulated in described shell (10), wherein, each group circuit branch comprises the single transformer (12), signal connector (13) and the voltage attenuator (14) that are linked in sequence;
Wherein, each single transformer (12) has primary coil (122) and secondary coil (124), a phase firewire in two input leads connection three-phase maintenance power supply (2) of described primary coil (122) and zero line, for carrying out step-down process to maintenance power supply;
First side of each signal connector (13) described connects two output leads of the secondary coil (124) of described single transformer (12);
One end of described each voltage attenuator (14) is connected on the opposite side of described signal connector (13) by the first concentric cable (7), and the other end of described voltage attenuator (14) is connected with the second concentric cable (8).
2. voltage signal extraction element as claimed in claim 1, it is characterized in that, described first concentric cable (7) comprises from the inside to the outside successively: inner wire (70), insulation course (71), mesh shields layer (72) and oversheath (73).
3. voltage signal extraction element as claimed in claim 2, it is characterized in that, each single transformer (12) comprises iron core (120), be arranged at primary coil (122) on iron core and secondary coil (124), at upper extraction two input leads of described primary coil (122), at upper extraction two output leads of described secondary coil (124); Described primary coil (122) and secondary coil (124) are provided with insulating tape and transformer case further;
An input lead in the primary coil (122) of described three single transformers (12) connects the N terminal of three-phase maintenance power supply (2), another input lead in described three single transformer primary coils (122) connects A, B, C tri-terminals of described three-phase maintenance power supply (2) respectively, synchronously to extract the three-phase voltage in described three-phase maintenance power supply (2), obtain the power-frequency voltage simulating signal of predetermined volt value through transformation.
4. a kind of voltage signal extraction element as claimed in claim 3, it is characterized in that, each signal connector (13) described comprising: connector shell (130), and the contact pin (132) be arranged in described connector shell (130) and wire clamp (134), in described contact pin (132), insulating gel (136) is filled with between wire clamp (134) and connector shell (130), the end of described connector shell (130) matches to wrap up described contact pin (132) and wire clamp (134) with a sheath (138), wherein, the contact pin of each signal connector (13) one end described, wire clamp is connected with two output leads of transformer secondary respectively, the contact pin (132) of the described signal connector other end, wire clamp (134) is connected with mesh shields layer (72) with the inner wire (70) of the first concentric cable (7) respectively.
5. a kind of voltage signal extraction element as claimed in claim 4, it is characterized in that, described voltage attenuator (14) inside comprises a resistance-capacitance type voltage divider, it comprises the first resistance R1, the first electric capacity C1, the second resistance R2 and the second electric capacity C2 of serial connection, the first end of the first resistance R1 is high-pressure side, between described first electric capacity C1 and the second resistance R2, draw low pressure end, draw the first common ground end and the second common ground end from second end of described second electric capacity C2;
Wherein, described high-pressure side and the first common ground end are connected with mesh shields layer (72) with the inner wire (70) of described first concentric cable (7) respectively, and described low pressure end is connected with mesh shields layer with the inner wire of described second concentric cable respectively with the second common ground end.
6. a kind of voltage signal extraction element as claimed in claim 5, is characterized in that, the other end of described second concentric cable (8) is connected to an oscillographic signal input part.
7. a kind of voltage signal extraction element as described in any one of claim 1 to 5, is characterized in that, described shell (10) adopts Polyvinylchloride material.
8. a test macro is put in switch cabinet electrified office, it is characterized in that, comprising:
Voltage signal extraction element (1) as described in any one of claim 1-7;
Detecting sensor (6) is put in office, and for the local discharge signal that the interior equipment of inductive switch cabinet (4) produces, it is by triaxial cable (90) connection signal conditioning module (5);
Oscillograph (3), an one signal input part connects described Signal-regulated kinase (5) by the 4th concentric cable (91), its another three signal input parts are connected on three voltage attenuators (14) of described voltage signal extraction element (1) respectively by three the second concentric cable (8), put Partial Discharge detected by detecting sensor (6) for showing described office respectively, and show the three-phase voltage waveform of described three-phase maintenance power supply (2) after transformation and decay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356566.8U CN204789879U (en) | 2015-05-28 | 2015-05-28 | Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356566.8U CN204789879U (en) | 2015-05-28 | 2015-05-28 | Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789879U true CN204789879U (en) | 2015-11-18 |
Family
ID=54529896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520356566.8U Active CN204789879U (en) | 2015-05-28 | 2015-05-28 | Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204789879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974350A (en) * | 2016-05-16 | 2016-09-28 | 张志谦 | Design and debugging method for probe circuit for radio-frequency resistance high-potential voltage tester |
| CN109541293A (en) * | 2018-12-27 | 2019-03-29 | 深圳供电局有限公司 | Voltage waveform extraction element |
-
2015
- 2015-05-28 CN CN201520356566.8U patent/CN204789879U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974350A (en) * | 2016-05-16 | 2016-09-28 | 张志谦 | Design and debugging method for probe circuit for radio-frequency resistance high-potential voltage tester |
| CN105974350B (en) * | 2016-05-16 | 2018-11-13 | 张志谦 | The designing and debugging methods of the high-potential voltage of resistance to radio frequency tester probe circuit |
| CN109541293A (en) * | 2018-12-27 | 2019-03-29 | 深圳供电局有限公司 | Voltage waveform extraction element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104880652A (en) | Switch cabinet live-line partial discharge test system and voltage signal extraction device thereof | |
| CN102540001B (en) | Method of checking alternating current loop of a 500kV transformer substation through carrying out simulated through-type three-phase short circuit | |
| CN101769980A (en) | Testing method simulating power transmission debugging | |
| CN206460118U (en) | A kind of distribution line short circuit and earth fault analog simulation pilot system | |
| CN102426321B (en) | Test method for simulating electrification of current transformer primary device during power transmission debugging | |
| CN105510721B (en) | A kind of New Device for Grounding Resistance Measurement of Grounding Grids and its application method | |
| CN103323751A (en) | High-voltage short-cable insulation terminal partial discharge testing device and using method | |
| CN203849288U (en) | Wiring conversion device for electrical routine tests of transformer | |
| CN204789879U (en) | Test system is put in electrified office of cubical switchboard and voltage signal extraction element thereof | |
| CN202649391U (en) | Cable defect simulation test system | |
| CN205027865U (en) | Dry -type air -core reactor interturn insulation electrical ageing test system | |
| CN105182173B (en) | Novel composite mutual inductor polarity tester | |
| CN104007354A (en) | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable | |
| CN207833325U (en) | The test device and mast switch controller of mast switch controller | |
| CN206479609U (en) | A kind of miniaturization Large Copacity pressure-resistant apparatus tested for GIS | |
| CN203561722U (en) | Two-frequency signal detection position indicator for electricity overhead line | |
| CN109324306B (en) | GIS equipment current transformer error testing system and construction method thereof | |
| CN102565614B (en) | Alternating voltage loop test method | |
| CN108152779A (en) | Electronic current mutual inductor check system and method | |
| CN204405728U (en) | A kind of arrester discharge counter | |
| CN209069965U (en) | DC Resistance Test of Transformer rapid wiring device | |
| CN2930032Y (en) | Novel high voltage switch cabinet | |
| CN204359903U (en) | A kind of control cables Insulation test auxiliary tank | |
| CN207249937U (en) | A kind of distribution net equipment partial discharge failure actual training device | |
| CN107271775B (en) | electric power overhead line phase detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |