CN108711694B - Open-circuit-preventing electric connector - Google Patents
Open-circuit-preventing electric connector Download PDFInfo
- Publication number
- CN108711694B CN108711694B CN201810730117.3A CN201810730117A CN108711694B CN 108711694 B CN108711694 B CN 108711694B CN 201810730117 A CN201810730117 A CN 201810730117A CN 108711694 B CN108711694 B CN 108711694B
- Authority
- CN
- China
- Prior art keywords
- transition
- current transformer
- hole
- bridging
- connection assembly
- 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
- 238000004804 winding Methods 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 203
- 239000004020 conductor Substances 0.000 claims description 142
- 230000007935 neutral effect Effects 0.000 claims description 54
- 230000013011 mating Effects 0.000 claims description 43
- 238000009413 insulation Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 17
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 8
- 239000000306 component Substances 0.000 description 97
- 238000010586 diagram Methods 0.000 description 33
- 239000008358 core component Substances 0.000 description 27
- 238000009434 installation Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 239000011258 core-shell material Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000009429 electrical wiring Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/10—Sockets for co-operation with pins or blades
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/08—Short-circuiting members for bridging contacts in a counterpart
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention discloses an open-circuit-preventing electric connector. The open circuit preventing electrical connector includes: the device comprises a first current transformer side socket connecting component, a first current transformer side plug connecting component, a second current transformer side socket connecting component, a second current transformer side plug connecting component, a secondary device side socket connecting component and a secondary device side plug connecting component. The electric connector provided by the invention can enable a certain phase of parallel windings of the secondary windings of two current transformers to be connected in parallel through single-phase bridging to form a closed loop, namely has the functions of testing single phase and current signals and preventing the secondary side of the current transformer from being opened. Meanwhile, the electric connector belongs to a plug-and-play connector, and can realize the connection of zero-current terminals of a secondary circuit of a current transformer, so that the number of wiring terminals is greatly reduced, the workload of on-site electric wiring is reduced, the wiring time is effectively shortened, and the safety problem caused by falling or virtual connection of the wiring terminals is avoided.
Description
Technical Field
The invention relates to the field of electrical equipment, in particular to an open-circuit-preventing electric connector.
Background
In the construction of a power system substation, electrical connection between various devices and control devices is usually performed at a substation site by adopting a terminal connection mode. Because the environmental conditions of the transformer substation engineering construction site are hard and are influenced by adverse factors such as high temperature, severe cold, rain, snow, sand wind and the like, the work load of the site electric wiring is huge, the wiring time is long, the error rate of the site wiring is high, the repair is frequent, and the joint debugging and joint testing progress of the transformer substation construction period and equipment and the whole transformer substation engineering quality are seriously restricted. Therefore, the plug-and-play technology of the electric connection of the intelligent substation is provided, the signal loop, the control loop, the AC/DC power supply loop and the like in the intelligent substation are subjected to the factory-like prefabricated cable technology, the rapid electric connection between the devices is realized on the intelligent substation site through the plug-and-play prefabricated cable, and the working efficiency and the quality of the site installation are greatly improved.
Because the intelligent substation sets up merging element at the total powerstation, each circuit spaced current transformer (current transformer, CT) secondary circuit passes through cable coupling to the merging element in the intelligent control cabinet, in view of current transformer secondary circuit open circuit can endanger personal and equipment safety, and the prefabricated cable connector of wide use at present, no matter be circular structure or rectangular structure all adopt direct voltage formula plug connected mode, CT current circuit prevents open circuit and adjacent current circuit bridging and only have a demand of concentrating the ground connection, therefore when current intelligent substation builds, current transformer secondary circuit all does not consider adopting the prefabricated cable technique of "plug and play", but has continued to remain the technical scheme of current test terminal wiring.
However, when two current transformers are connected in parallel in a 3/2 switch wiring mode and then are connected with the secondary equipment side, the number of wiring terminals is large, the work load of on-site electric wiring is large, the wiring time is long, the wiring terminals are easy to fall off or virtual connection causes a safety problem, the on-site wiring error rate is high, and the repair is frequent. Therefore, in order to meet the urgent need of shortening the construction period of the transformer substation, the prefabricated cable open-circuit-preventing electric connector suitable for the current transformer and the current is needed to be provided due to the factors of safe and stable operation, convenient maintenance and the like of the intelligent transformer substation.
Disclosure of Invention
The invention aims to provide an open-circuit-preventing electric connector which not only has a CT current signal testing function and an open-circuit-preventing function, but also can be used for realizing the connection of a zero-current terminal of a secondary circuit of a current transformer, belongs to a plug-and-play connector, is convenient and quick to install, is stable and firm in connection, and can overcome the safety problem caused by easy falling-off or virtual connection of terminals in terminal wiring.
In order to achieve the above object, the present invention provides the following solutions:
an open circuit preventing electric connector, the open circuit preventing electric connector is connected with the secondary side of first current transformer and second current transformer respectively, first current transformer with the secondary winding of second current transformer adopts parallelly connected mode to connect, the open circuit preventing electric connector includes: the first current transformer side socket connecting component, the first current transformer side plug connecting component, the second current transformer side socket connecting component, the second current transformer side plug connecting component, the secondary equipment side socket connecting component and the secondary equipment side plug connecting component,
the first current transformer side socket connection assembly, the second current transformer side socket connection assembly and the secondary device side plug connection assembly all comprise bridging core assemblies, and the bridging core assemblies comprise: a plurality of transition jack conductors, a bridging component, a bridging insulating shell, a push rod insulating shell covered on the bridging insulating shell and a plurality of insulating push rods,
The bridge assembly comprises a bridge piece assembly and a bridge block assembly; the bridge piece assembly comprises a central bridge part and three independent bridge parts, wherein the central bridge part is provided with three extension parts, the end part of each extension part is provided with a first transition through hole, one independent bridge part is arranged between the adjacent extension parts of the central bridge part, and each independent bridge part is provided with a second transition through hole; the bridge block assembly comprises three bridge blocks and three bridge springs, each bridge block is provided with a spring accommodating groove, each spring accommodating groove is internally provided with one bridge spring, and the free length of each bridge spring is larger than the depth of each spring accommodating groove; wherein,
a third transition through hole is further formed in each extension portion of the central bridging portion of the secondary equipment side plug connection assembly, a fourth transition through hole is further formed in each independent bridging portion of the secondary equipment side plug connection assembly, a neutral point through hole is further formed in the central bridging portion of the secondary equipment side plug connection assembly, the bridging core assembly of the secondary equipment side plug connection assembly further comprises a neutral point jack conductor, the bridging insulating shell of the secondary equipment side plug connection assembly corresponds to the neutral point through hole of the central bridging portion of the secondary equipment side plug connection assembly, a shell neutral point through hole is formed in the bridging insulating shell in a matched mode, the other ends of the three extension portions of the central bridging portion are connected with the neutral point through holes of the central bridging portion, and the neutral point jack conductor penetrates through the neutral point through holes of the central bridging portion and is arranged in the shell neutral point through holes in a penetrating mode;
The bridging insulating shell is provided with a plurality of shell transition through holes matched with the first transition through holes and the second transition through holes respectively, the bridging insulating shell of the secondary equipment side plug connecting assembly is provided with a plurality of shell transition through holes matched with the first transition through holes, the second transition through holes, the third transition through holes and the fourth transition through holes respectively, and one rail groove is arranged between the adjacent shell transition through holes of the first current transformer side socket connecting assembly and the second current transformer side socket connecting assembly; the bridging insulating shell of the secondary equipment side plug connection assembly is provided with a rail groove corresponding to a position between the adjacent extending part and the independent bridging part of the secondary equipment side plug connection assembly;
one of the transition jack conductors passes through one of the first transition through holes, one of the second transition through holes, one of the third transition through holes or one of the fourth transition through holes and is arranged in one of the shell transition through holes in a penetrating manner, one of the bridge block assemblies is arranged in one of the bridge assembly rail grooves, and the bridge spring is positioned between the bridge block and the bridge insulating shell;
The push rod insulating shell is provided with insulating rod accommodating through holes corresponding to the rail grooves on the bridging insulating shell, each insulating rod accommodating through hole is internally provided with an insulating push rod, and the insulating push rods can move in the insulating rod accommodating through holes under the action of external force;
the first current transformer side plug connection assembly, the second current transformer side plug connection assembly and the secondary equipment side socket connection assembly all comprise bridging matched assemblies, and the bridging matched assemblies comprise: a plurality of transition contact pin conductors, a matched insulating push rod shell and a matched insulating push rod, wherein,
the supporting insulation push rod shell is provided with supporting push rod accommodating through holes corresponding to the insulation push rods on the push rod insulation shell, and each supporting push rod accommodating through hole is fixedly provided with one supporting insulation push rod;
the supporting insulation push rod shell of the first current transformer side plug connection assembly and the second current transformer side plug connection assembly is also provided with transition contact pin accommodating through holes corresponding to shell transition through holes on the bridging insulation shell, and each transition contact pin accommodating through hole is internally provided with one transition contact pin conductor; the supporting insulation push rod shell of the secondary equipment side socket connecting assembly is also provided with transition contact pin accommodating through holes which correspond to a phase line shell transition through hole and a zero line shell transition through hole on the bridging insulation shell respectively, one transition contact pin conductor is arranged in each transition contact pin accommodating through hole, the phase line shell transition through hole is a shell transition through hole matched with the second transition through hole or the fourth transition through hole, and the zero line shell transition through hole is a shell transition through hole matched with the first transition through hole or the third transition through hole;
One transition jack conductor of the first current transformer side socket connection assembly is spliced with one transition pin conductor of the first current transformer side plug connection assembly, and one transition jack conductor of the second current transformer side socket connection assembly is spliced with one transition pin conductor of the second current transformer side plug connection assembly;
the transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connection assembly is spliced with the phase line transition pin conductor of the secondary equipment side socket connection assembly, the phase line transition pin conductor is a transition pin conductor matched with the phase line shell transition through hole, the transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connection assembly is spliced with the zero line pole transition pin conductor of the secondary equipment side socket connection assembly, and the zero line transition pin conductor is a transition pin conductor matched with the zero line shell transition through hole;
the transition jack conductor of the first current transformer side socket connecting component is connected with the secondary side of the first current transformer, the phase line transition pin conductor of the first current transformer side plug connecting component is connected with the transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connecting component, the phase line transition pin conductor of the first current transformer side plug connecting component is a transition pin conductor connected with the phase line of the secondary side of the first current transformer, the zero line transition pin conductor of the first current transformer side plug connecting component is connected with the transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connecting component, and the zero line transition pin conductor of the first current transformer side plug connecting component is a transition pin conductor connected with the zero line of the secondary side of the first current transformer;
The transition jack conductor of the second current transformer side socket connection assembly is connected with the secondary side of the second current transformer, the phase line transition pin conductor of the second current transformer side plug connection assembly is connected with the transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connection assembly, the phase line transition pin conductor of the second current transformer side plug connection assembly is a transition pin conductor connected with the phase line of the secondary side of the second current transformer, the zero line transition pin conductor of the second current transformer side plug connection assembly is connected with a transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connection assembly, the zero line transition pin conductor of the second current transformer side plug connection assembly is a transition pin conductor connected with the zero line of the secondary side of the second current transformer, and the zero line transition pin conductor passing through the same independent bridging portion of the second current transformer side plug connection assembly is a transition pin conductor connected with the second transition through hole of the second independent bridging portion and the same side plug connection assembly is a transition pin conductor passing through the same bridging portion of the second current transformer and the second current transformer side plug connection assembly.
Optionally, a neutral point pin accommodating through hole is arranged on the shell neutral point through hole on the bridging insulating shell corresponding to the secondary equipment side plug connecting assembly on the matched insulating push rod shell of the secondary equipment side socket connecting assembly in a matching manner.
Optionally, an embedded nut is preset in the neutral point through hole of the shell on the bridging insulating shell of the secondary equipment side plug connection assembly, the push rod insulating shell of the secondary equipment side plug connection assembly is provided with a push rod shell through hole corresponding to the embedded nut, and the neutral point jack conductor sequentially passes through the push rod shell through hole of the secondary equipment side plug connection assembly and the neutral point through hole of the central bridging portion of the secondary equipment side plug connection assembly and is in threaded connection with the embedded nut.
Optionally, the bridging core assembly further includes a jump ring insulating housing and a plurality of three-jaw jump rings that cover with the insulating housing of bridging, wherein, secondary side plug connection assembly the jump ring insulating housing set up with the jump ring of the insulating housing of bridging on the insulating housing transition through-hole of bridging and the corresponding jump ring of casing neutral point through-hole accomodate the through-hole, first current transformer side socket connection assembly with the insulating housing of jump ring of second current transformer side socket connection assembly set up with the jump ring that the through-hole corresponds accomodates the through-hole, every be provided with in the jump ring accomodate the through-hole one the three-jaw jump ring.
Optionally, the bridging core component of the first current transformer side socket connection component and the second current transformer side socket connection component further includes a bridging core shell and a collar in the bridging core, wherein a clamping groove is formed in an inner wall of the bridging core shell, the push rod insulating shell, the bridging insulating shell and the clamp spring insulating shell are sleeved inside the bridging core shell, and the collar in the bridging core is embedded in the clamping groove to fix the push rod insulating shell, the bridging insulating shell and the clamp spring insulating shell inside the bridging core shell.
Optionally, the bridging matched assembly further comprises a matched clamp spring insulating shell and a plurality of matched three-jaw clamp springs, wherein the matched clamp spring insulating shell is covered on the matched insulating push rod shell, a matched clamp spring accommodating through hole corresponding to the transition contact pin accommodating through hole is formed in the matched clamp spring insulating shell, and one matched three-jaw clamp spring is arranged in each matched clamp spring accommodating through hole.
Optionally, the bridging matching component of the first current transformer side plug connection component and the second current transformer side plug connection component further comprises a matching component shell, a locking outer ring, a matching component outer collar and a matching component inner collar, wherein an outer collar clamping groove is formed in the outer wall of the matching component shell, an inner collar clamping groove is formed in the inner wall of the matching component shell, the matching component shell is inserted into the locking outer ring, the matching component outer collar is inserted into the outer collar clamping groove, the matching insulating push rod shell and the matching clamp spring insulating shell are sleeved inside the matching component shell, and the matching component inner collar is inserted into the inner collar clamping groove to fix the matching insulating push rod shell and the matching clamp spring insulating shell inside the matching component shell.
According to the specific embodiment provided by the application, the application discloses the following technical effects:
firstly, a bridge block assembly is arranged between each independent bridge part and the extending part of the adjacent central bridge part of the open-circuit-preventing electric connector, and the bridge block connects and conducts one extending part of the adjacent pair of independent bridge parts and the central bridge part under the action of a bridge spring, so that the transition jack conductors on the adjacent pair of independent bridge parts and the extending parts are also connected and conducted with each other. When the transition jack conductors of the first current transformer side socket connection assembly are connected with the secondary side of the first current transformer, the transition jack conductors of the second current transformer side socket connection assembly are connected with the secondary side of the second current transformer, as the phase lines corresponding to the two transition jack conductors on the same independent bridging part of the secondary equipment side plug connection assembly are the same phase line of the first current transformer and the second current transformer respectively, the phase lines corresponding to the transition jack conductors of the same extending part of the central bridging part of the secondary equipment side plug connection assembly are the same phase zero lines of the first current transformer and the second current transformer respectively, and the first current transformer side socket connection assembly, the second current transformer side socket connection assembly and the secondary equipment side plug connection assembly can bridge and conduct the two ends of a certain phase winding of the first current transformer and the second current transformer which are connected in a parallel mode, namely, the secondary side end certain phase winding of the two current transformers can form a closed loop, and the open circuit preventing electric connector provided by the application has the function of preventing the secondary side of the current transformer from being opened.
Meanwhile, the open-circuit-preventing electric connector provided by the application can realize the corresponding connection of the first current transformer side socket connecting component and the first current transformer side plug connecting component through the insertion connection of the transition jack conductor and the transition pin conductor, and the corresponding connection of the second current transformer side socket connecting component and the second current transformer side plug connecting component. Simultaneously, can insert contact pin conductor and jack conductor respectively with the both ends of cable, a transition contact pin conductor of first current transformer side plug coupling assembling and second current transformer side plug coupling assembling is connected with the cable conductor, and a transition jack conductor of secondary equipment side plug coupling assembling is pegged graft with the jack conductor that is connected with the cable. Therefore, the electric connector provided by the application belongs to a plug-and-play connector, and can realize zero-cable terminal connection of a secondary circuit of a current transformer connected with current, so that the number of wiring terminals is greatly reduced, the workload of on-site electric wiring is reduced, the wiring time is effectively shortened, and the safety problem caused by falling off or virtual connection of the wiring terminals is avoided.
Moreover, the open-circuit prevention function of the first current transformer side socket connecting component, the second current transformer side socket connecting component and the secondary equipment side plug connecting component is realized through single-phase bridging, so that each independent protection or measurement device can obtain corresponding two wires (phase wires and zero wires) to form a loop when current is conducted, and when the current transformer is required to be conducted on-line operation maintenance or measurement, independent maintenance or measurement can be conducted on each phase. Therefore, the open circuit preventing electric connector provided by the application has a CT current signal testing function.
Further, the transition jack conductors on the three extensions of the center bridge portion of the secondary device side plug connection assembly are each connected with a neutral jack conductor in the neutral through hole. Therefore, when the neutral point jack conductor of the secondary equipment side plug connection assembly is grounded, each phase winding of the first current transformer and the second current transformer can form a closed loop and is bridged with the grounding end, so that the aim of concentrated one-point grounding of each phase winding of the secondary side of the current transformer is achieved, and the problem of repeated grounding of the CT secondary side loop is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an electrical wiring diagram of an open circuit preventing electrical connector according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating internal connection of each component in the open circuit preventing electrical connector according to the embodiment of the present invention;
Fig. 3 is an exploded view of a first current transformer side socket connection assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bridging core component of the secondary device side plug connection component according to an embodiment of the present invention;
fig. 5 is a schematic installation diagram of a push rod insulating housing and an insulating push rod of a first current transformer side socket connection assembly according to an embodiment of the present invention;
fig. 6 is a schematic installation diagram of a transition jack conductor and a bridge piece of the first current transformer side socket connection assembly according to the embodiment of the present invention;
fig. 7 is an installation schematic diagram of a bridge block assembly of a first current transformer side socket connection assembly according to an embodiment of the present invention;
fig. 8 is a schematic installation view of a bridge piece and a bridge block assembly of a first current transformer side socket connection assembly on a bridging insulating housing according to an embodiment of the present invention;
fig. 9 is a schematic installation diagram of a bridging insulating housing and a push rod insulating housing of a first current transformer side socket connection assembly according to an embodiment of the present invention;
fig. 10 is a schematic connection diagram of a grounding jack conductor and an embedded nut of a secondary device side plug connection assembly according to an embodiment of the present invention;
fig. 11 is a schematic installation diagram of a three-jaw clamp spring and a clamp spring insulating housing of a first current transformer side socket connection assembly according to an embodiment of the present invention;
Fig. 12 is an installation schematic diagram of a bridging core component of the first current transformer side socket connection component according to the embodiment of the present invention;
fig. 13 is a schematic installation view of a socket assembly of the first current transformer side socket connection assembly according to the embodiment of the present invention;
fig. 14 is an assembled schematic view of a plug housing and a locking outer ring of a first current transformer side plug connection assembly according to an embodiment of the present invention;
fig. 15 is a schematic view illustrating an installation of a mating insulating push rod of a first current transformer side plug connection assembly provided in an embodiment of the present invention on a mating insulating push rod housing;
fig. 16 is a schematic installation diagram of a matched three-jaw clamp spring and a matched clamp spring insulating housing of a first current transformer side plug connection assembly according to an embodiment of the present invention;
fig. 17 is an installation schematic diagram of a push rod core assembly of a first current transformer side plug connection assembly according to an embodiment of the present invention;
fig. 18 is an exploded view of a first current transformer side plug connection assembly according to an embodiment of the present invention;
FIG. 19 is an exploded view of a cable tail clip assembly provided in accordance with an embodiment of the present invention;
fig. 20 is a schematic diagram illustrating connection between a cable and a first current transformer side socket assembly according to an embodiment of the present invention;
FIG. 21 is a schematic diagram of a connection between a cable and a pin conductor according to an embodiment of the present invention;
fig. 22 is a schematic connection diagram of a first current transformer side plug assembly and a cable tail clip assembly according to an embodiment of the present invention;
fig. 23 is a schematic connection diagram of a socket assembly and a corresponding plug assembly of a first current transformer side connection assembly according to an embodiment of the present invention;
fig. 24 is a schematic connection diagram of a cable with a secondary device side plug assembly and a cable tail clip assembly according to an embodiment of the present invention;
fig. 25 is a schematic connection diagram of a secondary device side socket assembly according to an embodiment of the present invention;
fig. 26 is a schematic connection diagram of a plug assembly and a corresponding socket assembly of a secondary device side connection assembly according to an embodiment of the present invention;
fig. 27 is a cross-sectional view of a bridging core component of a first current transformer side socket connection component provided in an embodiment of the invention;
fig. 28 is a cross-sectional view of a bridging core component of a secondary device side plug connection component according to an embodiment of the present invention;
fig. 29 is a schematic diagram of wiring and operation of the plug connection assembly according to the embodiment of the present invention in a current testing state;
fig. 30 is an operation schematic diagram of a plug connection assembly according to an embodiment of the present invention exiting a test state;
Fig. 31 is a cross-sectional view of a connection pin conductor of a first current transformer side plug according to an embodiment of the present invention;
fig. 32 is a cross-sectional view of a wiring pin conductor of a secondary device side socket according to an embodiment of the present invention;
fig. 33 is a schematic plugging diagram of a plug assembly and a socket assembly on a first current transformer side according to an embodiment of the present invention;
fig. 34 is a schematic plugging diagram of a plug assembly and a socket assembly on a secondary device side according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an open-circuit-preventing electric connector which not only has a CT current signal testing function and an open-circuit-preventing function, but also can be used for realizing the connection of a zero-current terminal of a secondary circuit of a current transformer, belongs to a plug-and-play connector, is convenient and quick to install, is stable and firm in connection, and can overcome the safety problem caused by easy falling-off or virtual connection of terminals in terminal wiring.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is an electrical wiring diagram of an open circuit preventing electrical connector according to an embodiment of the present invention. Fig. 2 is a schematic diagram illustrating internal connection of each component in the open circuit preventing electrical connector according to an embodiment of the present invention. As shown in connection with fig. 1 and 2, an open circuit preventing electrical connector includes: the first current transformer side socket connecting component F1, the first current transformer side plug connecting component T1, the secondary equipment side socket connecting component F2, the secondary equipment side plug connecting component T2, the second current transformer side socket connecting component and the second current transformer side plug connecting component, wherein the structure of the second current transformer side socket connecting component is the same as that of the first current transformer side socket connecting component F1, and the structure of the second current transformer side plug connecting component is the same as that of the first current transformer side plug connecting component T1. Part (a) of fig. 2 is a schematic view of internal connection of the first current transformer side socket connection assembly F1, part (b) of fig. 2 is a schematic view of internal connection of the first current transformer side plug connection assembly T1, part (c) of fig. 2 is a schematic view of internal connection of the secondary device side plug connection assembly T2, and part (d) of fig. 2 is a schematic view of internal connection of the secondary device side socket connection assembly F2.
Fig. 3 is an exploded view of a bridging core component of a first current transformer side socket connection component according to an embodiment of the present utility model. The first current transformer side socket connection assembly F1 and the second current transformer side socket connection assembly each include a bridging core assembly 1. As shown in fig. 3, the bridging core component 1 includes: bridging core body shell 1.1, bridging core body 1.2, bridging core body inner collar 1.3. The secondary device side plug connection assembly T2 comprises a bridging core 1.2. Wherein the bridging core 1.2 specifically comprises: the plug comprises a push rod insulating shell 1.2.1, an insulating push rod 1.2.2, a plurality of transition jack conductors 1.2.3, a central bridging part 1.2.5, an independent bridging part 1.2.6, a bridging block 1.2.7, a bridging spring 1.2.8, a bridging insulating shell 1.2.9, a three-jaw clamping spring 1.2.11, a clamping spring insulating shell 1.2.12, a conducting wire jack conductor 1.2.13 and a bridging core body 1.2 of a secondary equipment side plug connection assembly T2, wherein an embedded nut 1.2.10 is further arranged.
Fig. 4 is a schematic structural diagram of a bridging core component of a secondary device side plug connection component according to an embodiment of the present utility model, where part (a) of fig. 4 is a schematic front view of the bridging core component of the secondary device side plug connection component, and part (b) of fig. 4 is a schematic back view of the bridging core component of the secondary device side plug connection component. As shown in parts (a) and (b) of fig. 4, a third transition through hole is further formed in each extension portion of the central bridge portion 1.2.5 of the secondary device side plug connection assembly T2, a fourth transition through hole is further formed in each independent bridge portion 1.2.6 of the secondary device side plug connection assembly T2, a neutral point through hole is further formed in the central bridge portion 1.2.5 of the secondary device side plug connection assembly T2, the bridge core assembly 1 of the secondary device side plug connection assembly T2 further comprises a neutral point jack conductor 1.2.4 and a ground wire jack conductor 1.2.14, the neutral point through hole of the central bridge portion 1.2.5 of the secondary device side plug connection assembly T2 corresponds to the neutral point through hole of the secondary device side plug connection assembly T2, and the other ends of the three extension portions of the central bridge portion 1.2.5 are all connected with the neutral point through hole of the central bridge portion 1.2.5, and the neutral point jack conductor 1.2.4 passes through the neutral point through hole of the central bridge portion 1.2.5 and is formed in the neutral point through hole of the shell of the secondary device side plug connection assembly T2.
The first current transformer side plug connection assembly T1 and the second current transformer side plug connection assembly each comprise a bridging mating assembly 2. The bridging kit 2 comprises: locking the outer ring 2.1; the matched assembly housing 2.2, the push rod core assembly 2.3, the matched assembly inner collar 1.3 and the matched assembly outer collar 2.4. The secondary device side receptacle connector assembly F2 includes a push rod core assembly 2.3. Wherein the push rod core assembly 2.3 comprises: the three-jaw clamp spring comprises a matched insulating push rod shell 2.3.1, a matched insulating push rod 2.3.2, a matched clamp spring insulating shell 2.3.3, a transitional pin conductor 2.3.4 and a matched three-jaw clamp spring 2.3.5.
The assembly process of the bridging core component 1 of the first current transformer side socket connection component F1 provided in this embodiment is as follows:
fig. 5 is a schematic installation diagram of an insulating push rod and a push rod insulating housing of a first current transformer side socket connection assembly according to an embodiment of the present invention. The insulating casing 1.2.1 of push rod has offered the insulating rod that corresponds with the rail groove on bridging insulating casing and accomodates the through-hole, every be provided with an insulating push rod 1.2.2 in the insulating rod accomodates the through-hole, insulating push rod 1.2.2 can be under the exogenic action in the insulating rod accomodates the through-hole. As shown in fig. 5, the insulating push rods 1.2.2 shown in part (b) of fig. 5 are respectively pushed into corresponding insulating rod receiving through holes in the push rod insulating housing 1.2.1 shown in part (a) of fig. 5 during installation, and the structure after the installation is as shown in part (c) of fig. 5.
Fig. 6 is a schematic installation diagram of a transition jack conductor and a bridge piece of the first current transformer side socket connection assembly according to the embodiment of the present invention. As shown in fig. 6, the transition jack conductor 1.2.3 shown in the part (a) of fig. 6 is respectively assembled in the corresponding through holes on the central bridging part 1.2.5 and the independent bridging part 1.2.6 shown in the part (b) of fig. 6 by adopting an interference fit technology, and the structure after the assembly is shown in the part (c) of fig. 6.
Fig. 7 is an installation schematic diagram of a bridge block assembly of a first current transformer side socket connection assembly according to an embodiment of the present invention. The bridge springs 1.2.8 shown in part (b) of fig. 7 are respectively fitted into corresponding spring receiving grooves in the bridge block 1.2.7 shown in part (a) of fig. 7, forming the assembly shown in part (c) of fig. 7.
The assembled assemblies shown in fig. 6 and 7 are respectively arranged in the corresponding receiving rail grooves and the corresponding through holes on the bridging insulating shell 1.2.9 shown in the part (a) of fig. 8 in sequence to form the assembly shown in the part (b) of fig. 8. The assembled assembly shown in fig. 5 is then capped over the assembly shown in part (b) of fig. 8 to form the assembly shown in fig. 9.
For the secondary-device-side plug connection assembly T2 shown in fig. 4, a neutral through hole reserved for the neutral jack conductor 1.2.4 is provided at the center on the center bridge portion 1.2.5 thereof. Fig. 10 is a schematic connection diagram of a neutral point jack conductor 1.2.4 and an embedded nut 1.2.10 of a secondary device side plug connection assembly according to an embodiment of the present invention. As shown in part (a) of fig. 10, the neutral point jack conductor 1.2.4 is inserted into the neutral point through hole of the bridging insulating housing 1.2.9 of the secondary equipment side plug connection assembly T2, and is screwed in pairs with the embedded nut 1.2.10 embedded in the bridging insulating housing 1.2.9, so that the push rod insulating housing 1.2.1 and the bridging insulating housing 1.2.9 form a whole, and a closed space is formed at the covering position, so as to form the assembly shown in part (b) of fig. 10.
Fig. 11 is a schematic installation diagram of a three-jaw clamp spring and a clamp spring insulating housing of a first current transformer side socket connection assembly according to an embodiment of the present invention. As shown in fig. 11, the three-jaw snap springs 1.2.11 shown in part (a) of fig. 11 are respectively mounted in corresponding snap spring receiving through holes in the snap spring insulating housing 1.2.12 shown in part (b) of fig. 11, and the mounted structure is as shown in part (c) of fig. 11.
As shown in fig. 12, the assembled component of fig. 9 is covered with the assembled component of fig. 11, to form the component shown in fig. 12, namely, the bridging core 1.2.
As shown in part (a) of fig. 13, the bridging core 1.2 is inserted from the rear of the bridging core housing 1.1, pushed to a fixed position, and then is mounted into the bridging core inner collar 1.3, so that the bridging core inner collar 1.3 is embedded into a clamping groove on the inner wall of the bridging core housing 1.1, and finally the socket assembly 1 shown in part (b) of fig. 13 is formed.
The assembly process of the bridging mating component 2 of the first current transformer side plug connection component T1 provided in this embodiment is as follows:
as shown in part (a) of fig. 14, the mating assembly housing 2.2 is inserted from the front of the locking outer ring 2.1, pushed into a fixed position, and then fitted into the mating assembly outer collar 2.4, so that the mating assembly outer collar 2.4 is fitted into a groove on the outer wall of the mating assembly housing 2.2, thereby forming the structure shown in part (b) of fig. 14.
As shown in fig. 15, the mating insulating push rods 2.3.2 shown in part (b) of fig. 15 are respectively pushed into corresponding mating push rod receiving through holes in the mating insulating push rod housing 2.3.1 shown in part (a) of fig. 15, forming the assembly shown in part (c) of fig. 15.
As shown in fig. 16, the three-jaw snap spring 2.3.5 shown in part (a) of fig. 16 is respectively accommodated in a corresponding cabin in the snap spring insulating housing 2.3.3 shown in part (b) of fig. 16, thereby forming the assembly shown in part (c) of fig. 16.
As shown in part (a) of fig. 17, the assembled assembly of fig. 15 is correspondingly covered with the assembled assembly of fig. 16 to form the putter core assembly 2.3 shown in part (b) of fig. 17.
As shown in part (a) of fig. 18, the plunger core assembly 2.3 is inserted from the rear of the assembly shown in part (b) of fig. 17, pushed into place, and then fitted into the mating assembly inner collar 2.5, such that the mating assembly inner collar 2.5 is fitted into a groove on the inner wall of the mating assembly housing 2.2, thereby eventually forming the bridging mating assembly 2 shown in part (b) of fig. 18.
In this embodiment, the assembly process of the bridging core component 1 of the second current transformer side socket connection component and the secondary device side plug connection component is similar to the assembly process of the bridging core component 1 of the first current transformer side socket connection component F1, and the assembly process of the bridging mating component 2 of the second current transformer side plug connection component and the secondary device side socket connection component is similar to the assembly process of the bridging mating component 2 of the first current transformer side plug connection component T1, which will not be described herein again.
In this embodiment, the cable tail clip assembly 3 is further disposed at the connection portion of the first current transformer side plug connection assembly and the cable, the connection portion of the second current transformer side plug connection assembly and the cable, and the connection portion of the secondary device side plug connection assembly and the cable. The cable tail clip assembly 3 includes: the tail clamp switching casing 3.1, the stuffing box 3.2, the stuffing box bottom pad 3.3, the cable fixation clamp 3.4, the arc line ball board 3.5, fastening bolt 3.6.
As shown in part (a) of fig. 19, the stuffing box bottom pad 3.3 and stuffing box 3.2 are sequentially put into the cable fixing clip 3.4, and then the tail clip transfer housing 3.1 is accessed from the front end of the cable fixing clip 3.4 and screwed. In addition, an arc-shaped wire pressing plate 3.5 is installed at the rear end of the cable fixing clamp 3.4, and then the cable tail clamp assembly 3 shown in part (b) of fig. 19 is finally formed by fixing and positioning by fastening bolts 3.6.
After the bridging core component 1, the bridging matching component 2 and the cable tail clamp component 3 are assembled, when connection between devices needs to be completed, as shown in part (a) of fig. 20, the secondary side cable wires of the first current transformer are respectively connected to the conductive wire jack conductors 1.2.13 to complete prefabricated connection, and then, as shown in part (b) of fig. 20, the conductive wire jack conductors 1.2.13 connected with the cable wires are respectively inserted into the bridging core component 1 of the corresponding first current transformer side socket connection component F1.
The connecting cable is connected to the transition pin conductor 2.3.4 shown in fig. 21, then the transition pin conductor 2.3.4 connected with the cable is inserted into the bridging matching component 2, and the cable fixing diagram formed by connecting the bridging matching component 2 and the cable tail clamp component 3 is shown in fig. 22.
Finally, as shown in part (a) of fig. 23, the first current transformer side socket connection assembly F1 connected to the first current transformer is mated with the first current transformer side plug connection assembly T1 with the connection cable, forming a link connection as shown in part (b) of fig. 23.
Similarly, the process of pairing connection between the second current transformer side socket connection assembly and the second current transformer side plug connection assembly is similar to the above process, and will not be repeated here.
The process of mating and connecting the secondary-device-side plug connection assembly T2 with the secondary-device-side receptacle connection assembly F2 is as follows:
first, as shown in part (a) of fig. 24, the other ends of the cables respectively connected to the first current transformer side plug connection assembly and the second current transformer side plug connection assembly are respectively connected to the conductive wire jack conductors 1.2.13, and the ground wire is connected to the neutral point jack conductors 1.2.14, thereby completing the prefabricated connection. The cable fixing diagram formed by inserting the conductive wire jack conductor 1.2.13 to which the cable wire is connected and the neutral point jack conductor 1.2.14 to which the ground wire is connected into the bridging core component 1 of the corresponding secondary device side plug connection component T2, respectively, and connecting the bridging core component 1 and the cable tail clip component 3 is shown in part (b) of fig. 24.
Then, the cable connected to the secondary device is connected to the transition pin conductor 2.3.4 shown in part (a) of fig. 25, and as shown in part (b) of fig. 25, the transition pin conductor 2.3.4 to which the cable is connected is inserted into the bridging mating component 2 of the secondary device side receptacle connector assembly F2.
Finally, as shown in part (a) of fig. 26, the cabled secondary-device-side plug connection assembly T2 shown in part (b) of fig. 24 is mated with the cabled secondary-device-side receptacle connection assembly F2 shown in part (b) of fig. 25 to form a link shown in part (b) of fig. 26, thereby realizing conduction between devices.
In this embodiment, the working principle of the first current transformer side socket connection assembly F1 connected to the first current transformer and the first current transformer side plug connection assembly T1 connected to the first current transformer side socket connection assembly F1 in a pairing manner are described by taking as an example:
the cross-sectional view A-A of the bridging core component in the first current transformer side socket connector assembly F1 shown in part (a) of fig. 27 is shown in part (b) of fig. 27. As can be seen in fig. 27 (b), the bridge piece 1.2.7 connects and conducts the central bridge 1.2.5 and the individual bridge 1.2.6 under the action of the bridge spring 1.2.8. A pair of transition jack conductors 1.2.3, which are interference fit mounted on the conductive central bridge portion 1.2.5 and the independent bridge portions 1.2.6, are also mutually conductive. When two conductive wire jack conductors 1.2.13 which are in press connection with the conductive wires are respectively inserted into the two conductive wire jack conductors 1.2.3 which are in conduction, the end A and the end B corresponding to the two conductive wires are bridged and conducted, namely, a certain phase winding at the secondary side end of CT forms a closed loop.
The cross-sectional A-A view of the center bridge portion and the individual bridge portion of the secondary-device-side plug connection assembly shown in part (a) of fig. 28 is shown in part (b) of fig. 28, and the cross-sectional A-A view of the neutral point receptacle conductor of the secondary-device-side plug connection assembly shown in part (c) of fig. 28 is shown in part (d) of fig. 28. As can be seen from part (b) of fig. 28, the bridge piece 1.2.7 connects and conducts the central bridge part 1.2.5 and the independent bridge part 1.2.6 under the action of the bridge spring 1.2.8. A pair of transition jack conductors 1.2.3, which are interference fit mounted on the conductive central bridge portion 1.2.5 and the independent bridge portions 1.2.6, are also mutually conductive. As can be seen from fig. 28 (d), the neutral jack conductor 1.2.4 passes through the neutral through hole in the middle of the central bridge portion 1.2.5, and is in contact with the crown reed embedded in the neutral through hole, so that the neutral jack conductor 1.2.4 is in conduction with the central bridge portion 1.2.5. In addition, the penetrating end of the neutral point jack conductor 1.2.4 is matched and screwed with an embedded nut 1.2.10 embedded in the bridging insulating shell 1.2.9 so as to achieve the integration of the push rod insulating shell 1.2.1 and the bridging insulating shell 1.2.9, thereby encapsulating all built-in bridging components.
As can be seen from fig. 1 and 28, the device-side plug connection assembly bridges A1 and A2, B1 and B2, and C1 and C2 by separate bridging portions, and the same phase line of the first current transformer and the second current transformer can be regarded as the phase line. After the pairing connection of the whole link is completed, namely, the phase A1 and the phase A2 are combined into one phase to be led out from A, the phase B1 and the phase B2 are combined into one phase to be led out from B, and the phase C1 and the phase C2 are combined into one phase to be led out from C, so that each phase and each current can be independently detected or protected.
As can be seen from fig. 28, when the conductive wire jack conductor 1.2.13, which is crimped with the cable, and the ground wire jack conductor 1.2.14, which is connected with the ground, are respectively inserted into the corresponding transition jack conductors 1.2.3 and neutral point jack conductors 1.2.4, the a ' ends, B ' ends and C ' ends, which correspond to the conductive wires, are bridged and conducted with the N ends, that is, certain phase windings at the secondary side ends of the two current transformers can form a closed loop at the secondary equipment side plug connection assembly and are concentrated to be grounded at one point, so as to meet the requirement of concentrated grounding at one point at the secondary side of the CT.
Therefore, when the bridging core component 1 of the secondary equipment side plug connection component T2 is not connected with the bridging matching component 2 of the secondary equipment side socket connection component F2 in a matched and spliced manner, or the secondary equipment side plug connection component is disconnected by plugging, the corresponding two-to-two transition jack conductors 1.2.3 and the grounded neutral point jack conductor 1.2.4 are connected and conducted mutually. Therefore, the open circuit phenomenon of the CT secondary side end is avoided, the safety of personnel and equipment is prevented from being endangered by high voltage generated by the open circuit of the CT secondary side end, and only one common point is grounded in a concentrated mode, so that the requirement of the circuit grounding of the CT secondary side end is met.
Meanwhile, because the open circuit prevention is realized through single-phase bridging, and each independent detection or protection device can respectively obtain a corresponding group of current loops, when on-line operation maintenance and detection are needed, each phase can be independently measured and observed.
As shown in fig. 29, when it is required to detect current signals at two endpoints corresponding to a certain phase and current at the secondary side end of the CT, two measuring probes of the current detection instrument are inserted into two transition jack conductors 1.2.3 corresponding to the plug connection component at the secondary device side, and then inserted into corresponding insulation rod receiving through holes on the insulation shell 1.2.1 of the push rod by using a special insulation screwdriver according to a stress direction shown by a dashed arrow in fig. 29, the insulation push rod 1.2.2 is pushed, and then the bridge block 1.2.7 bridged between the corresponding central bridge 1.2.5 and the independent bridge 1.2.6 is pushed, so that a bridge between one extension part of the central bridge 1.2.5 and the corresponding independent bridge 1.2.6 is disconnected, thereby the current detection instrument detects current signals between two corresponding endpoints a ', B'. The numerical signal on the current detection instrument is compared with the numerical signal on the detection instrument on the detection equipment end, so that the accuracy and the good performance of the detection instrument on the detection equipment end can be ensured, and the superiority of CT can be judged.
In addition, the bridging block 1.2.7 is arranged in a special rail groove space on the bridging insulating shell 1.2.9, so that the bridging block 1.2.7 can vertically move when being pushed or the bridging spring 1.2.8 is restored, the phenomena of deflection and blocking are avoided, and the stability and the safety of the bridging open circuit prevention are ensured.
As shown in fig. 30, after the current detecting instrument detects the current signals between the two corresponding end points a ', B', the special insulating screwdriver is withdrawn first, so that the bridge block 1.2.7 bridged between the extension part of the central bridge part 1.2.5 and the independent bridge part 1.2.6 is restored under the action of the elastic force of the bridge spring 1.2.8, and the bridge between the two corresponding end points a ', B' to be detected is restored, so that the two end points a ', B' are connected and conducted. And finally, withdrawing the detection instrument to finish detection.
After the detection of the CT secondary side end is finished, the normal connection of the detection equipment of the CT secondary side end and the detection equipment of the secondary signal acquisition end needs to be restored, so that the detection equipment of the secondary signal acquisition end can acquire, detect and record the current signal of the CT side again. The state of the bridge fitting 2 ready for connection is as shown in fig. 31 and 32. The cross-sectional view shown in part (a) of fig. 31 is shown in part (b) of fig. 31. The cross-sectional view shown in part (a) of fig. 32 is shown in part (b) of fig. 32.
After the bridging core body component 1 and the bridging matched component 2 are matched and spliced, the connection between the corresponding endpoints A and A ', B and B' is spliced and matched with the transition jack conductor 1.2.3 on the bridging core body component 1 through the transition pin conductors 2.3.4 on the bridging matched component 2, so that the corresponding endpoints A and A ', B and B' are conducted. As shown in fig. 33, in the plugging and matching process of the bridging matching component 2 and the bridging core component 1, after the pin conductor contacts with the jack conductor, as the plugging and matching of the bridging matching component 2 and the bridging core component 1 continues to go deep, the matching insulating push rod 2.3.2 in the bridging matching component 2 pushes the insulating push rod 1.2.2 in the bridging core component 1, and then pushes the bridging block 1.2.7 bridged between the extension part of the corresponding central bridging part 1.2.5 and the independent bridging part 1.2.6, and compresses the bridging spring 1.2.8, so that the bridging connection between the corresponding points a and B is disconnected. After the matching of the bridging matching component 2 and the bridging core component 1 is completed, the locking outer ring 2.1 on the bridging matching component 2 is meshed and locked with the bridging core shell 1.1 of the bridging core component 1 at the moment, so that the bridging matching component 2 and the bridging core component 1 form a whole. The plugging process of the plug connection assembly and the socket connection assembly at the secondary device side is shown in parts (a) and (b) of fig. 34, and reference is made to the plugging process of the plug assembly and the socket assembly at the first current transformer side.
Therefore, as can be seen in conjunction with fig. 1 and 2, when the first current transformer side socket connection assembly F1 is connected with the secondary side of the first current transformer, the bridging spring 1.2.8 pushes the bridging block 1.2.7 so that A1 bridges Na1, B1 bridges Nb1, and C1 bridges Nc1, and thus the CT side socket connection assembly has an open circuit preventing function. Similarly, the second current transformer side socket connection assembly and the secondary device side plug connection assembly T2 also have an open circuit preventing function.
When each bridging core component 1 is connected with the corresponding bridging matching component 2, the insulating push rod in the bridging matching component 2 pushes away the bridging blocks 1.2.7 in the bridging core component 1, namely the bridging of A1, A2, A and Na is disconnected, the bridging of B1, B2, B and Nb is disconnected, and the bridging of C1, C2, C and Nc is realized, so that corresponding circuits are mutually communicated, namely A1, A2 and A are communicated, B1, B2 and B are communicated, and C1, C2 and C are communicated.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. An open-circuit-preventing electric connector for electric connection of a current transformer and a prefabricated cable, characterized in that the open-circuit-preventing electric connector is respectively connected with secondary sides of a first current transformer and a second current transformer, the first current transformer and a secondary winding of the second current transformer are connected in parallel, and the open-circuit-preventing electric connector comprises: the first current transformer side socket connecting component, the first current transformer side plug connecting component, the second current transformer side socket connecting component, the second current transformer side plug connecting component, the secondary equipment side socket connecting component and the secondary equipment side plug connecting component,
the first current transformer side socket connection assembly, the second current transformer side socket connection assembly and the secondary device side plug connection assembly all comprise bridging core assemblies, and the bridging core assemblies comprise: a plurality of transition jack conductors, a bridging component, a bridging insulating shell, a push rod insulating shell covered on the bridging insulating shell and a plurality of insulating push rods,
the bridge assembly comprises a bridge piece assembly and a bridge block assembly; the bridge piece assembly comprises a central bridge part and three independent bridge parts, wherein the central bridge part is provided with three extension parts, the end part of each extension part is provided with a first transition through hole, one independent bridge part is arranged between the adjacent extension parts of the central bridge part, and each independent bridge part is provided with a second transition through hole; the bridge block assembly comprises three bridge blocks and three bridge springs, each bridge block is provided with a spring accommodating groove, each spring accommodating groove is internally provided with one bridge spring, the free length of each bridge spring is larger than the depth of each spring accommodating groove, and the bridge blocks connect and conduct the central bridge part and the independent bridge parts under the action of the bridge springs; wherein,
A third transition through hole is further formed in each extension portion of the central bridging portion of the secondary equipment side plug connection assembly, a fourth transition through hole is further formed in each independent bridging portion of the secondary equipment side plug connection assembly, a neutral point through hole is further formed in the central bridging portion of the secondary equipment side plug connection assembly, the bridging core assembly of the secondary equipment side plug connection assembly further comprises a neutral point jack conductor, the bridging insulating shell of the secondary equipment side plug connection assembly corresponds to the neutral point through hole of the central bridging portion of the secondary equipment side plug connection assembly, a shell neutral point through hole is formed in the bridging insulating shell in a matched mode, the other ends of the three extension portions of the central bridging portion are connected with the neutral point through holes of the central bridging portion, and the neutral point jack conductor penetrates through the neutral point through holes of the central bridging portion and is arranged in the shell neutral point through holes in a penetrating mode;
the bridging insulating shell is provided with a plurality of shell transition through holes matched with the first transition through holes and the second transition through holes respectively, the bridging insulating shell of the secondary equipment side plug connecting assembly is provided with a plurality of shell transition through holes matched with the first transition through holes, the second transition through holes, the third transition through holes and the fourth transition through holes respectively, and one rail groove is arranged between the adjacent shell transition through holes of the first current transformer side socket connecting assembly and the second current transformer side socket connecting assembly; the bridging insulating shell of the secondary equipment side plug connection assembly is provided with a rail groove corresponding to a position between the adjacent extending part and the independent bridging part of the secondary equipment side plug connection assembly;
One of the transition jack conductors passes through one of the first transition through holes, one of the second transition through holes, one of the third transition through holes or one of the fourth transition through holes and is arranged in one of the shell transition through holes in a penetrating manner, one of the bridge block assemblies is arranged in one of the rail grooves, and the bridge spring is positioned between the bridge block and the bridge insulating shell;
the push rod insulating shell is provided with insulating rod accommodating through holes corresponding to the rail grooves on the bridging insulating shell, each insulating rod accommodating through hole is internally provided with an insulating push rod, and the insulating push rods can move in the insulating rod accommodating through holes under the action of external force;
the first current transformer side plug connection assembly, the second current transformer side plug connection assembly and the secondary equipment side socket connection assembly all comprise bridging matched assemblies, and the bridging matched assemblies comprise: a plurality of transition contact pin conductors, a matched insulating push rod shell and a matched insulating push rod, wherein,
the supporting insulation push rod shell is provided with supporting push rod accommodating through holes corresponding to the insulation push rods on the push rod insulation shell, and each supporting push rod accommodating through hole is fixedly provided with one supporting insulation push rod;
The supporting insulation push rod shell of the first current transformer side plug connection assembly and the second current transformer side plug connection assembly is also provided with transition contact pin accommodating through holes corresponding to shell transition through holes on the bridging insulation shell, and each transition contact pin accommodating through hole is internally provided with one transition contact pin conductor; the supporting insulation push rod shell of the secondary equipment side socket connecting assembly is also provided with transition contact pin accommodating through holes which correspond to a phase line shell transition through hole and a zero line shell transition through hole on the bridging insulation shell respectively, one transition contact pin conductor is arranged in each transition contact pin accommodating through hole, the phase line shell transition through hole is a shell transition through hole matched with the second transition through hole or the fourth transition through hole, and the zero line shell transition through hole is a shell transition through hole matched with the first transition through hole or the third transition through hole;
one transition jack conductor of the first current transformer side socket connection assembly is spliced with one transition pin conductor of the first current transformer side plug connection assembly, and one transition jack conductor of the second current transformer side socket connection assembly is spliced with one transition pin conductor of the second current transformer side plug connection assembly;
The transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connection assembly is spliced with the phase line transition pin conductor of the secondary equipment side socket connection assembly, the phase line transition pin conductor is a transition pin conductor matched with the phase line shell transition through hole, the transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connection assembly is spliced with the zero line transition pin conductor of the secondary equipment side socket connection assembly, and the zero line transition pin conductor is a transition pin conductor matched with the zero line shell transition through hole;
the transition jack conductor of the first current transformer side socket connecting component is connected with the secondary side of the first current transformer, the phase line transition pin conductor of the first current transformer side plug connecting component is connected with the transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connecting component, the phase line transition pin conductor of the first current transformer side plug connecting component is a transition pin conductor connected with the phase line of the secondary side of the first current transformer, the zero line transition pin conductor of the first current transformer side plug connecting component is connected with the transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connecting component, and the zero line transition pin conductor of the first current transformer side plug connecting component is a transition pin conductor connected with the zero line of the secondary side of the first current transformer;
The transition jack conductor of the second current transformer side socket connection assembly is connected with the secondary side of the second current transformer, the phase line transition pin conductor of the second current transformer side plug connection assembly is connected with the transition jack conductor passing through a second transition through hole or a fourth transition through hole of the secondary equipment side plug connection assembly, the phase line transition pin conductor of the second current transformer side plug connection assembly is a transition pin conductor connected with the phase line of the secondary side of the second current transformer, the zero line transition pin conductor of the second current transformer side plug connection assembly is connected with the transition jack conductor passing through a first transition through hole or a third transition through hole of the secondary equipment side plug connection assembly, the zero line transition pin conductor of the second current transformer side plug connection assembly is a transition pin conductor connected with the zero line of the secondary side of the second current transformer, and the zero line transition pin conductor passing through the same independent bridging part of the second current transformer side plug connection assembly is a transition pin conductor connected with the second transition through hole of the second side plug connection assembly and the second current transformer, and the zero line of the second current transformer side plug connection assembly extends through the same bridging part of the same phase line of the second current transformer and the second current transformer;
The open circuit prevention is realized through single-phase bridging, and each independent detection or protection device can respectively obtain a corresponding group of current loops, and when on-line operation maintenance or detection is needed, each phase is measured or observed independently.
2. The open circuit prevention electrical connector of claim 1, wherein a neutral point pin receiving through hole is also provided in the secondary device side receptacle connector assembly on the mating insulative push rod housing in mating correspondence with a housing neutral point through hole in the bridging insulative housing of the secondary device side plug connector assembly.
3. The open-circuit-preventing electrical connector according to claim 1, wherein an embedded nut is preset in the housing neutral point through hole on the bridging insulating housing of the secondary device side plug connection assembly, the push rod insulating housing of the secondary device side plug connection assembly is provided with a push rod housing through hole corresponding to the embedded nut, and the neutral point jack conductor sequentially passes through the push rod housing through hole of the secondary device side plug connection assembly, the neutral point through hole of the central bridging portion of the secondary device side plug connection assembly and is in threaded connection with the embedded nut.
4. The open-circuit-preventing electrical connector according to claim 1, wherein the bridging core assembly further comprises a snap spring insulating housing and a plurality of three-jaw snap springs, wherein the snap spring insulating housing of the secondary device side plug connection assembly is provided with snap spring receiving through holes corresponding to a housing transition through hole and a housing neutral point through hole on the bridging insulating housing of the secondary device side plug connection assembly, the snap spring insulating housings of the first current transformer side socket connection assembly and the second current transformer side socket connection assembly are provided with snap spring receiving through holes corresponding to the housing transition through holes, and one of the three-jaw snap springs is provided in each of the snap spring receiving through holes.
5. The open circuit prevention electrical connector of claim 4, wherein the bridge core assembly of the first current transformer side socket connection assembly and the second current transformer side socket connection assembly further comprises a bridge core housing and a bridge core inner collar, wherein a clamping groove is formed in an inner wall of the bridge core housing, the push rod insulating housing, the bridge insulating housing and the clamp spring insulating housing are sleeved inside the bridge core housing, and the bridge core inner collar is embedded in the clamping groove to fix the push rod insulating housing, the bridge insulating housing and the clamp spring insulating housing inside the bridge core housing.
6. The electrical open-circuit-preventing connector of claim 1, wherein the bridging mating assembly further comprises a mating snap spring insulating housing and a plurality of mating three-jaw snap springs, wherein the mating snap spring insulating housing is provided with mating snap spring receiving through holes corresponding to the transition pin receiving through holes, and one mating three-jaw snap spring is arranged in each mating snap spring receiving through hole.
7. The electrical open circuit prevention connector of claim 6, wherein the bridging mating assembly of the first current transformer side plug connection assembly and the second current transformer side plug connection assembly further comprises a mating assembly housing, a locking outer ring, a mating assembly outer collar and a mating assembly inner collar, wherein an outer collar slot is formed in an outer wall of the mating assembly housing, an inner collar slot is formed in an inner wall of the mating assembly housing, the mating assembly housing is inserted into the locking outer ring, the mating assembly outer collar is embedded in the outer collar slot, the mating insulating push rod housing and the mating snap spring insulating housing are sleeved inside the mating assembly housing, and the mating assembly inner collar is embedded in the inner collar slot to fix the mating insulating push rod housing and the mating snap spring insulating housing inside the mating assembly housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730117.3A CN108711694B (en) | 2018-07-05 | 2018-07-05 | Open-circuit-preventing electric connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730117.3A CN108711694B (en) | 2018-07-05 | 2018-07-05 | Open-circuit-preventing electric connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108711694A CN108711694A (en) | 2018-10-26 |
| CN108711694B true CN108711694B (en) | 2023-10-20 |
Family
ID=63873823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810730117.3A Active CN108711694B (en) | 2018-07-05 | 2018-07-05 | Open-circuit-preventing electric connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108711694B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366118B (en) * | 2020-10-15 | 2024-02-13 | 中车青岛四方机车车辆股份有限公司 | Short-circuit device for plug-in relay and plug-in relay |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0594850A (en) * | 1990-05-30 | 1993-04-16 | Amp Inc | Housing for electric connector |
| DE4444551A1 (en) * | 1994-12-01 | 1996-06-05 | Wago Verwaltungs Gmbh | Current transformer disconnection terminal |
| CN2302608Y (en) * | 1997-06-24 | 1998-12-30 | 洛阳航空电器厂 | Wire spring type electric connector |
| CN201402859Y (en) * | 2009-04-17 | 2010-02-10 | 珠海许继电气有限公司 | CT open circuit preventing connector of outdoor trolly wire |
| CN101803124A (en) * | 2007-07-11 | 2010-08-11 | 莫列斯公司 | Filter connector |
| CN102027639A (en) * | 2008-03-14 | 2011-04-20 | 菲尼克斯电气公司 | Jumper, and structural unit comprising at least two modular electric terminals and a jumper |
| CN203607558U (en) * | 2013-11-19 | 2014-05-21 | 上海辰竹仪表有限公司 | Machine seat structure of surge protector |
| CN205811203U (en) * | 2016-06-23 | 2016-12-14 | 成都瑞联电气股份有限公司 | A kind of anti-open circuit cylindrical connector |
| CN205985599U (en) * | 2016-07-20 | 2017-02-22 | 上海华仪配电自动化有限公司 | Prevent cable of opening a way |
| CN206211197U (en) * | 2016-10-12 | 2017-05-31 | 上海思方电气技术有限公司 | A kind of anti-open circuit pluggable electric connector |
| CN207459195U (en) * | 2017-11-27 | 2018-06-05 | 天津市三源电力设备制造有限公司 | A kind of anti-open circuit plug-in connector for possessing cold weld wiring |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6835079B2 (en) * | 2002-05-23 | 2004-12-28 | Positronic Industries, Inc. | Electrical connector assembly with shorting member |
| BRPI0601439B1 (en) * | 2006-04-24 | 2021-10-13 | Eduardo Pedrosa Santos | RAPID CONNECTION AND DISCONNECTION OF ELECTRICAL CIRCUITS WITH AUTOMATIC SHORT-CIRCUIT OF SECONDARY OF MECHANICALLY IDENTIFIABLE CURRENT TRANSFORMERS AND WITH THE LOCKABLE SHORT-CIRCUIT FUNCTION |
| US7857660B2 (en) * | 2007-11-09 | 2010-12-28 | Randy Austin | Watt hour meter socket adapter with current transformer housing structure |
-
2018
- 2018-07-05 CN CN201810730117.3A patent/CN108711694B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0594850A (en) * | 1990-05-30 | 1993-04-16 | Amp Inc | Housing for electric connector |
| DE4444551A1 (en) * | 1994-12-01 | 1996-06-05 | Wago Verwaltungs Gmbh | Current transformer disconnection terminal |
| CN2302608Y (en) * | 1997-06-24 | 1998-12-30 | 洛阳航空电器厂 | Wire spring type electric connector |
| CN101803124A (en) * | 2007-07-11 | 2010-08-11 | 莫列斯公司 | Filter connector |
| CN102027639A (en) * | 2008-03-14 | 2011-04-20 | 菲尼克斯电气公司 | Jumper, and structural unit comprising at least two modular electric terminals and a jumper |
| CN201402859Y (en) * | 2009-04-17 | 2010-02-10 | 珠海许继电气有限公司 | CT open circuit preventing connector of outdoor trolly wire |
| CN203607558U (en) * | 2013-11-19 | 2014-05-21 | 上海辰竹仪表有限公司 | Machine seat structure of surge protector |
| CN205811203U (en) * | 2016-06-23 | 2016-12-14 | 成都瑞联电气股份有限公司 | A kind of anti-open circuit cylindrical connector |
| CN205985599U (en) * | 2016-07-20 | 2017-02-22 | 上海华仪配电自动化有限公司 | Prevent cable of opening a way |
| CN206211197U (en) * | 2016-10-12 | 2017-05-31 | 上海思方电气技术有限公司 | A kind of anti-open circuit pluggable electric connector |
| CN207459195U (en) * | 2017-11-27 | 2018-06-05 | 天津市三源电力设备制造有限公司 | A kind of anti-open circuit plug-in connector for possessing cold weld wiring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108711694A (en) | 2018-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108598751B (en) | Open-circuit-preventing electric connector | |
| CN108711694B (en) | Open-circuit-preventing electric connector | |
| CN110047692B (en) | Three-phase common-box arranged electric switch | |
| CN109950722B (en) | Open-circuit-preventing system for secondary circuit of current transformer and prefabricated cable | |
| CN112881766B (en) | Method and device for replacing ammeter in case of no power failure | |
| CN201956482U (en) | Binding post capable of realizing switchover of short circuit and open circuit | |
| TW201431206A (en) | Combinational wiring board | |
| CN108899690B (en) | Prevent electric connection spare that opens a way | |
| CN215262135U (en) | Transformer oil temperature measuring device and transformer | |
| CN212301636U (en) | Aviation plug's switching on-line measuring interface arrangement | |
| CN205178044U (en) | Secondary binding post | |
| CN211014365U (en) | Relay protection test wire | |
| CN211292995U (en) | Power transformer high-voltage lead switching device | |
| EP2693576B1 (en) | Electric power base and electric power gateway | |
| CN106936047A (en) | A kind of bridge type pluggable electric connector | |
| CN208352654U (en) | A kind of single-phase one point of multiloop a little concentrates the anti-short circuit connector of PT of ground connection | |
| CN215680505U (en) | Wiring terminal with adjustable distance and depth | |
| CN219554122U (en) | Special quick assembly disassembly formula jumper cable of 400V power supply point | |
| CN219610940U (en) | Terminal shorting tool for debugging | |
| CN215645235U (en) | Portable storage battery signal acquisition connecting device | |
| CN217404485U (en) | Comprehensive interface device for excitation system test | |
| CN204855721U (en) | Sensor | |
| CN216488839U (en) | Three-way power line of industrial plug | |
| CN213753786U (en) | Cable fault distance and terminal monitoring device | |
| CN215728565U (en) | Touchable terminal cable high-voltage test connecting tool and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |