CN209657987U - Ring network cabinet anti-resonance potential transformer - Google Patents

Ring network cabinet anti-resonance potential transformer Download PDF

Info

Publication number
CN209657987U
CN209657987U CN201920747548.0U CN201920747548U CN209657987U CN 209657987 U CN209657987 U CN 209657987U CN 201920747548 U CN201920747548 U CN 201920747548U CN 209657987 U CN209657987 U CN 209657987U
Authority
CN
China
Prior art keywords
voltage
potential transformer
network cabinet
iron core
ring network
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 - Fee Related
Application number
CN201920747548.0U
Other languages
Chinese (zh)
Inventor
于捍国
于鸿涛
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.)
DALIAN NEW ANYUE ELECTRIC POWER EQUIPMENT Co Ltd
Original Assignee
DALIAN NEW ANYUE ELECTRIC POWER EQUIPMENT Co Ltd
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 DALIAN NEW ANYUE ELECTRIC POWER EQUIPMENT Co Ltd filed Critical DALIAN NEW ANYUE ELECTRIC POWER EQUIPMENT Co Ltd
Priority to CN201920747548.0U priority Critical patent/CN209657987U/en
Application granted granted Critical
Publication of CN209657987U publication Critical patent/CN209657987U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to electrical equipment technical fields, provide a kind of ring network cabinet anti-resonance potential transformer, comprising: are poured the zero sequential potential transformer and three voltage transformers with no-load voltage ratio being integrated;Three voltage transformers with no-load voltage ratio form YYO formula connection, and A, B, C phase of the voltage transformer are respectively used to connect corresponding looped network cabinet wire A, B, C three-phase;The zero sequential potential transformer includes: first voltage iron core and zero sequence coil;The voltage transformer includes: a terminal, primary coil, secondary coil, second voltage iron core and secondary terminals;The second voltage iron core is annular, and secondary coil is wound on the side stem of the second voltage iron core, winds primary coil on the outside of the secondary coil;The output end of the primary coil draws a terminal, and the output end of the secondary coil draws secondary terminals.The utility model can play the role of current limliting and inhibit resonance, ensure mutual inductor operational safety.

Description

Ring network cabinet anti-resonance potential transformer
Technical field
The utility model relates to electrical equipment technical field more particularly to a kind of ring network cabinet anti-resonance potential transformers.
Background technique
The Vv formula mode of connection for two voltage transformers composition that voltage transformer used in the ring network cabinet of city now uses, only Can measure AC phase, metering cannot accomplish each phase metering, after use the YYO modes of connection of three voltage transformer one instead.But Often there is three-phase imbalance problem on the line in such mutual inductor, and line over-voltage is also easy to appear problem.Neutral point not In the non-direct ground system of ground connection, it is to cause thing that ferro-resonance over-voltage caused by iron electromagnetic type voltage transformer, which is common, Therefore a kind of more internal overvoltage.This overvoltage gently then makes fuse failure of voltage transformer, heavy then to burn voltage mutual Sensor, or even demolition porcelain insulator and arrester cause system shutdown.It is existing that series resonance can be generated under certain power supply effect As leading to occur serious resonance overvoltage in system.
Utility model content
The utility model, which mainly solves existing threephase potential transformer, often to be occurred three-phase imbalance on the line, inhibits humorous The technical problems such as phenomenon of shaking generation, propose a kind of ring network cabinet anti-resonance potential transformer, can play current limliting and inhibit resonance Effect, ensure mutual inductor operational safety, achieve the effect that three-phase line single-phase measurement, measuring accuracy is accurate.It is mutual to adapt to voltage The operation of sensor full working scope.
The utility model provides a kind of ring network cabinet anti-resonance potential transformer, comprising: is poured one zero be integrated Sequence voltage mutual inductor and three voltage transformers with no-load voltage ratio;
Three voltage transformers with no-load voltage ratio form YYO formula connection, and A, B, C phase of the voltage transformer are respectively used to connect Connect corresponding looped network cabinet wire A, B, C three-phase;The N of three voltage transformers is in parallel in one and connects zero sequential potential transformer The N phase of A phase, the zero sequential potential transformer is used to be grounded;
The zero sequential potential transformer includes: first voltage iron core and zero sequence coil (6);The first voltage iron core is ring Shape, the zero sequence coil (6) are wrapped on the side stem of first voltage iron core;One end connection zero of the zero sequence coil (6) O phase, the N phase of other end connection zero sequence transformer of sequence mutual inductor;
The voltage transformer include: a terminal (1), primary coil (2), secondary coil, second voltage iron core (3) and Secondary terminals (4);The second voltage iron core (3) is annular, is wound on the side stem of the second voltage iron core (3) secondary Coil, the secondary coil outside wind primary coil (2);The output end of the primary coil (2) draws a terminal (1), The output end of the secondary coil draws secondary terminals (4).
Preferably, mounting base is arranged in the bottom of the ring network cabinet anti-resonance potential transformer.
Preferably, fuse built in the ring network cabinet anti-resonance potential transformer.
Preferably, the fuse is once intracavitary by American spindle nose insertion mutual inductor.
Preferably, a terminal (1) uses American spindle nose.
Preferably, a zero sequential potential transformer and three voltage transformers with no-load voltage ratio are poured by epoxy resin (5) Integrally.
A kind of ring network cabinet anti-resonance potential transformer provided by the utility model is formed, three using 4PT voltage transformer Phase voltage mutual inductor forms YYO formula wiring by three voltage transformers, and N-terminal is connected in parallel the end A of zero sequential potential transformer, zero sequence The N-terminal of voltage transformer is grounded, and can be played the role of current limliting and be inhibited resonance.Using good epoxide resin vacuum casting one It is body formed.Inscribed fuse has small in size, light-weight, noiseless, Maintenance free using American spindle nose, plug-in installation, Overvoltage ability is strong, and has the function of anti-electricity-theft device.Built-in fuse, route go wrong, and high current is passed through, fusing Device plays the role of current limliting, blocking.Mutual inductor operational safety is protected, a terminal uses American spindle nose, plug installation, fuse Damage replacement is convenient, safe and applicable.And realize metering, it measures, protects integrated function.
Detailed description of the invention
Fig. 1 is the structural schematic diagram one of ring network cabinet anti-resonance potential transformer provided by the utility model;
Fig. 2 is the structural schematic diagram two of ring network cabinet anti-resonance potential transformer provided by the utility model;
Fig. 3 is the wiring schematic diagram of the utility model under normal circumstances;
Fig. 4 is the voltage vector diagram of the utility model under normal circumstances;
Fig. 5 is voltage vector diagram when the utility model zero sequential potential transformer A phase is grounded.
Appended drawing reference: a 1, terminal;2, primary coil;3, second voltage iron core;4, secondary terminals;5, epoxy resin; 6, zero sequence coil.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that described herein Specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It also should be noted that being Convenient for description, part relevant to the utility model is illustrated only rather than full content in attached drawing.
Fig. 1 is the structural schematic diagram one of ring network cabinet anti-resonance potential transformer provided by the utility model;Fig. 2 is this reality With the structural schematic diagram two of the ring network cabinet anti-resonance potential transformer of novel offer.As shown in Figure 1, 2, the utility model is implemented The ring network cabinet anti-resonance potential transformer that example provides, comprising: be poured a zero sequential potential transformer being integrated and three same The voltage transformer of no-load voltage ratio.The epoxy resin that one zero sequential potential transformer and three voltage transformers with no-load voltage ratio pass through insulation 5 pour into an integrated entity.
Three voltage transformers with no-load voltage ratio form YYO formula connection, and A, B, C phase of the voltage transformer are respectively used to connect Connect corresponding looped network cabinet wire A, B, C three-phase;The N of three voltage transformers is in parallel in one and connects zero sequential potential transformer The N phase of A phase, the zero sequential potential transformer is used to be grounded;
The zero sequential potential transformer includes: first voltage iron core and zero sequence coil 6;The first voltage iron core is ring Shape, the zero sequence coil 6 are wrapped on the side stem of first voltage iron core;One end connection zero sequence of the zero sequence coil 6 is mutual O phase, the N phase of other end connection zero sequence transformer of sensor;
The voltage transformer includes: a terminal 1, primary coil 2, secondary coil, second voltage iron core 3 and secondary terminals Son 4;The second voltage iron core 3 is annular, winds secondary coil on the side stem of the second voltage iron core 3, described two Primary coil 2 is wound on the outside of secondary coil, i.e., first winds secondary coil on the side stem of second voltage iron core 3, then is wound primary Coil 2, primary coil 2 is in the periphery of secondary coil;The output end of the primary coil 2 draws a terminal 1, the primary end Son 1 uses American spindle nose.The output end of the secondary coil draws secondary terminals 4.Ring network cabinet antiresonance mutual induction of voltage Mounting base is arranged in the bottom of device.
In addition, fuse built in the ring network cabinet anti-resonance potential transformer.The fuse is inserted by American spindle nose It is once intracavitary to enter mutual inductor.Dedicated fuse is fixed on American spindle nose, and insertion mutual inductor is once intracavitary, is made by fixinig plate American spindle nose is fixed tight.
Fig. 3 is the wiring schematic diagram under the utility model normal operation;Fig. 4 be the utility model under normal circumstances Voltage vector diagram.As shown in Figure 3,4, under normal circumstances, voltage transformer secondary side a-o, b-o, c-o are respectively connected to relatively absolutely Edge monitors that voltmeter, residual voltage circuit breaker connect in t2Between mutual inductor secondary side X '-O.Using this wiring, under normal circumstances, T1 Mutual inductor only reflects positive sequence voltageThree-phase voltage is equal in magnitude, and 120 ° of phase difference, neutral point potential zero, Namely Ux’=0.And when A phase metallic earthing, vectogram is as shown in figure 4, i.e. Ux’=Uo=Ua, external at this time zero sequence relay There are voltage, i.e., capable of emitting ground signalling in the both ends device YJ, and the numerical value of b phase voltage table reflection should be It is equal to line voltage, C phase voltage tableIt is also equal to line voltage. Such wiring can reduce influence of the line over-voltage to mutual inductor.
Fig. 5 is voltage vector diagram when the utility model zero sequential potential transformer A phase is grounded.As shown in figure 5, and when generation When ground connection, when such as A phase metallic earthing, voltage reflection is just incorrect, then B phase voltage table is the voltage of b-x ', because Ux’=-Ua, i.e., Therefore Three-phase voltage meter still balances, and is phase voltage, and can issue ground signalling at this time, because ground signalling relay connects in t2Line On circle, substitution connects at open-delta in the past, and UxThere is the residual voltage of 50V or so, coil both ends are acted because there is voltage, When system voltage or route resonance occurred in route, when overvoltage acts on mutual inductor, it is big to act on voltage transformer Electric current is grounded by zero sequential potential transformer, and the big resistance of zero sequential potential transformer high pressure plays the role of current limliting and inhibits resonance.
The working principle of ring network cabinet anti-resonance potential transformer provided by the utility model: when route has ground connection or generation High current.When high current passes through, when the fuse in mutual inductor reaches blowout current, fuse fuse failure, so that protection is mutual Sensor, when resonance overvoltage occurs in route, instant high-voltage flows through fuse, and fuse melts because volt-second characteristic fails moment Break to protect mutual inductor, mutual inductor once just has high voltage at this time, and 3 times or 5 subharmonic are had in high voltage, and mutual inductor is easy height Pressure is saturated mutual inductor iron core, generates high current once passing through from mutual inductor, this is to the damage and failure of voltage transformer It is maximum, but have zero sequential potential transformer, it is equivalent to a high-tension resistive current limliting, earth current is made to become smaller.To which protection is mutual Sensor is not damaged.It is grounded earliest using by high-tension resistive, since the heat that high current, high voltage generate just compares Greatly, it is desirable that high-tension resistive capacity it is bigger, high-tension resistive is easy to burn or since overheat reduces service life thus, after High-tension resistive is replaced using zero sequential potential transformer, since mutual inductor has iron core, substantially increases capacity, line footpath The ability that mentioning makes greatly mutual inductor bear high current improves.
Ring network cabinet anti-resonance potential transformer provided by the utility model, threephase potential transformer is by three mutual induction of voltage Device forms the wiring of YYO formula, and N-terminal is connected in parallel the end A of zero sequential potential transformer, the N-terminal ground connection 4PT one of zero sequential potential transformer Formula structure.Built-in fuse, if route goes wrong, high current is passed through, and fuse plays the role of current limliting, blocking.It protects Mutual inductor operational safety is protected, a terminal uses American spindle nose, and plug installation, fuse damage replacement is convenient, safe and applicable.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is modified the technical solutions described in the foregoing embodiments, or to some or all of the technical features It is equivalently replaced, the scope of the technical solutions of the embodiments of the utility model that it does not separate the essence of the corresponding technical solution.

Claims (6)

1. a kind of ring network cabinet anti-resonance potential transformer characterized by comprising it is mutual to be poured a residual voltage being integrated Sensor and three voltage transformers with no-load voltage ratio;
Three voltage transformers with no-load voltage ratio form YYO formula connection, and A, B, C phase of the voltage transformer are respectively used to connection pair Answer looped network cabinet wire A, B, C three-phase;The N of three voltage transformers is in parallel in one and connects the A phase of zero sequential potential transformer, The N phase of the zero sequential potential transformer is used to be grounded;
The zero sequential potential transformer includes: first voltage iron core and zero sequence coil (6);The first voltage iron core is annular, The zero sequence coil (6) is wrapped on the side stem of first voltage iron core;One end connection zero sequence of the zero sequence coil (6) is mutual O phase, the N phase of other end connection zero sequence transformer of sensor;
The voltage transformer includes: a terminal (1), primary coil (2), secondary coil, second voltage iron core (3) and secondary Terminal (4);The second voltage iron core (3) is annular, winds secondary line on the side stem of the second voltage iron core (3) Circle, the secondary coil outside wind primary coil (2);The output end of the primary coil (2) draws a terminal (1), institute The output end for stating secondary coil draws secondary terminals (4).
2. ring network cabinet anti-resonance potential transformer according to claim 1, which is characterized in that the ring network cabinet is humorous with resisting Mounting base is arranged in the bottom of vibration voltage transformer.
3. ring network cabinet anti-resonance potential transformer according to claim 1, which is characterized in that the ring network cabinet is humorous with resisting Shake fuse built in voltage transformer.
4. ring network cabinet anti-resonance potential transformer according to claim 3, which is characterized in that the fuse passes through beauty It is once intracavitary that formula spindle nose is inserted into mutual inductor.
5. ring network cabinet anti-resonance potential transformer according to claim 1, which is characterized in that a terminal (1) Using American spindle nose.
6. ring network cabinet anti-resonance potential transformer according to claim 1, which is characterized in that a residual voltage mutual inductance Device and three voltage transformers with no-load voltage ratio are poured into an integrated entity by epoxy resin (5).
CN201920747548.0U 2019-05-23 2019-05-23 Ring network cabinet anti-resonance potential transformer Expired - Fee Related CN209657987U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920747548.0U CN209657987U (en) 2019-05-23 2019-05-23 Ring network cabinet anti-resonance potential transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920747548.0U CN209657987U (en) 2019-05-23 2019-05-23 Ring network cabinet anti-resonance potential transformer

Publications (1)

Publication Number Publication Date
CN209657987U true CN209657987U (en) 2019-11-19

Family

ID=68530505

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920747548.0U Expired - Fee Related CN209657987U (en) 2019-05-23 2019-05-23 Ring network cabinet anti-resonance potential transformer

Country Status (1)

Country Link
CN (1) CN209657987U (en)

Similar Documents

Publication Publication Date Title
US9714957B2 (en) High voltage divider
JP2007525933A (en) Superconducting current limiting system and superconducting current limiting method
Hassan et al. Review of ferroresonance in power distribution grids
CN209657987U (en) Ring network cabinet anti-resonance potential transformer
CN211578569U (en) Circuit for preventing mutual inductor from resonating
CN102226974B (en) Voltage transformer capable of eliminating ferromagnetic resonance
CN106158335A (en) A kind of three-phase resonance-eleminating type voltage inductor
CN201438412U (en) Zero sequence voltage transformer for neutral point
CN108459285A (en) Ferroresonance Overvoltage Caused by PT experimental method
CN203895257U (en) Outdoor voltage transformer with high-voltage side and low-voltage side both provided with fuse protectors for protection
CN206806162U (en) Anti- ferromagnetic resonance type combination transformer
CN206040418U (en) Three -phase harmonic elimination formula voltage transformer
CN206609912U (en) The voltage transformer module and electric power meter of 10kV electric power meters
CN109755010A (en) A kind of voltage transformer with air duct radiation and secondary fusing
CN204928152U (en) Anti oscillation device of distribution network
CN106680565B (en) The voltage transformer module and electric energy metering device of 10kV electric energy metering device
Hoerauf et al. Avoiding potential transformer ferroresonant problems in industrial power systems
CN203747286U (en) Permanent-magnet high-voltage switch measurement integrated device
CN213986616U (en) Zero sequence voltage detection device
CN208520909U (en) A kind of indoor two elements three-phase power metering box of band protection
CN102332684B (en) Ferromagnetic resonance resistant and self-powered 2PT three-phase three-wire electronic transformer high-voltage electric energy metering cabinet or metering box
CN214380084U (en) Lightning protection device that protectiveness is strong
CN210403480U (en) Combined transformer
CN209388862U (en) A kind of voltage transformer with air duct radiation and secondary fusing
CN206711692U (en) A kind of differential voltage protection discharge coil

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191119

Termination date: 20210523