CN213844999U - Zero sequence current transformer convenient to wiring area prevents function of opening a way - Google Patents
Zero sequence current transformer convenient to wiring area prevents function of opening a way Download PDFInfo
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- CN213844999U CN213844999U CN202022804122.XU CN202022804122U CN213844999U CN 213844999 U CN213844999 U CN 213844999U CN 202022804122 U CN202022804122 U CN 202022804122U CN 213844999 U CN213844999 U CN 213844999U
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Abstract
The utility model relates to an electrical manufacturing technical field specifically discloses a zero sequence current transformer convenient to function of opening a way is prevented in wiring area. The current transformer comprises an outer insulating shell, an aviation plug, a zero sequence measurement and protection integrated small iron core, a zero sequence secondary winding and an inner insulator, it is characterized in that the zero sequence measurement and protection integrated small iron core, the zero sequence secondary winding and the inner insulator are arranged in the outer insulating shell, the zero sequence secondary winding is uniformly wound on the zero sequence measurement and protection integrated small iron core, the inner insulator is distributed between the outer insulating shell and the zero sequence secondary winding, the zero sequence secondary winding is connected with the aviation plug female head through an outgoing line terminal, outer insulating housing is the annular, the aircraft nose female head is the notch cuttype boss, the bottom embedding of aircraft nose female head sets up on outer insulating housing's the lateral surface, the utility model provides a zero sequence current transformer of function of opening a way can prevent that zero sequence current transformer from appearing the condition of opening a way at the during operation in the wiring area of being convenient for.
Description
Technical Field
The utility model relates to an electrical manufacturing technical field especially relates to a zero sequence current transformer convenient to function of opening a way is prevented in wiring area.
Background
The load impedance connected with the secondary side of the zero sequence current transformer is very small, which is equivalent to a short circuit, the voltage of the secondary side is very low, but when the secondary circuit of the zero sequence current transformer has an open circuit fault, the secondary current is zero, the magnetic flux generated by the primary current is rapidly increased, the magnetic flux of the iron core is saturated, the secondary side can generate high voltage of thousands of volts or even tens of thousands of volts, the safety of workers is endangered, and the structure of an instrument and a relay can be damaged.
The structural design or manufacturing quality of the test receiving terminal in the secondary loop has defects, and the tester fails in working or is not careful when working, such as pressing wrong positions when restoring wiring; the current in the secondary circuit is overlarge, a proper lead is not used, and the terminal joint is not tightly pressed, so that instruments, relays and the like are damaged, and the secondary open circuit of the current transformer is realized.
Therefore, the utility model discloses the people provides a zero sequence current transformer convenient to wiring area prevents function of opening a way for solve above-mentioned zero sequence current transformer problem of opening a way.
SUMMERY OF THE UTILITY MODEL
(1) Technical problem to be solved
The embodiment of the utility model provides a zero sequence current transformer convenient to function of opening a way is prevented in area of working a telephone switchboard has solved the technical problem that the operation personnel misconnection and circuit appear opening a way.
(2) Technical scheme
In a first aspect, the embodiment of the utility model provides a zero sequence current transformer convenient to function of opening a way is prevented in area of working a telephone switchboard, this zero sequence current transformer of function of opening a way is prevented in area of working a telephone switchboard of being convenient for includes:
the utility model provides an outer insulating housing, the female head of aviation plug, zero sequence survey and protect integrative little iron core, zero sequence secondary winding, internal insulation body, its characterized in that, zero sequence survey protect integrative little iron core zero sequence secondary winding with internal insulation sets up in the outer insulating housing, the even coiling of zero sequence secondary winding is in on the little iron core of zero sequence survey and protect integrative, internal insulation body distributes the outer insulating housing with between the zero sequence secondary winding, there is the wire hole on the internal insulation body, there is terminal outgoing lines in the wire hole, terminal outgoing lines's one end is being connected zero sequence secondary winding, terminal outgoing lines's the other end is being connected the female head of aviation plug, the outer insulating housing is the annular, the female head of aviation plug is notch cuttype boss, the bottom embedding of the female head of aviation plug sets up on the lateral surface of outer insulating housing.
Furthermore, at least one pair of external terminals and at least one pair of open-circuit prevention terminals are distributed in the aviation plug female head along the circumferential direction, the external terminals are connected with the open-circuit prevention terminals, and the open-circuit prevention terminals are connected with the other ends of the outgoing line terminals.
Further, a pair of external terminal includes first external terminal and the external terminal of second, prevent that open circuit terminal is including the first terminal of preventing opening a circuit and the second of preventing opening a circuit that is connected, first external terminal is connected with the first terminal of preventing opening a circuit, the terminal connection of preventing opening a circuit of second external terminal and second.
Further, an insulating isolating strip is arranged between the external connection terminal and the open-circuit prevention terminal.
Further, an insulating isolating strip is arranged between the first external terminal and the second external terminal; and an insulating isolating strip is arranged between the first open-circuit preventing terminal and the second open-circuit preventing terminal.
Further, the outer insulating shell is made of engineering plastics.
Further, the engineering plastic is selected from one of ABS plastic, polyethylene, polypropylene and polystyrene.
Further, the zero sequence measurement and protection integrated small iron core is of a circular ring type.
Further, the inner insulator is formed by vacuum potting using epoxy or urethane glue between the outer insulating case and the secondary winding.
Further, the zero sequence measurement and protection integrated small iron core is made of amorphous alloy or silicon steel iron core or permalloy.
Further, the outlet terminal is cylindrical.
(3) The utility model has the advantages of the following and the beneficial effects
1. The utility model provides a zero sequence current transformer of function of opening a way can prevent that operation personnel from misconnecting in the area of being convenient for to work a telephone switchboard.
2. The utility model provides a zero sequence current transformer of function of opening a way can prevent that zero sequence current transformer from appearing the condition of opening a way at the during operation in the area of being convenient for to work a telephone switchboard.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a cross-sectional structure of a zero sequence current transformer a-a in fig. 3, which is convenient for the wiring tape to prevent the open circuit function.
Fig. 2 is the embodiment of the present invention provides a schematic structure diagram of a zero sequence current transformer with a function of preventing open circuit in a wiring zone, which uses an aviation plug as a visual angle.
Fig. 3 is a front view of the zero sequence current transformer convenient for the wiring tape open circuit prevention function.
In the figure:
1-an outer insulator shell; 2-an aircraft plug; 3-zero sequence measurement and protection integrated small iron core; 4-zero sequence secondary winding; 5-an inner insulator; 6-a first open-prevention terminal; 7-a second open-prevention terminal; 8-a first external terminal; 9-a second external terminal; 10-insulating spacer bars.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, substitutions and improvements in the parts, components and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is the utility model discloses zero sequence current transformer overall structure schematic diagram convenient to function of opening a way is prevented in area of working a telephone switchboard, as shown in fig. 1, should equip including the zero sequence current transformer who is convenient for function of opening a way is prevented in area of working a telephone switchboard and included:
the magnetic suspension motor comprises an outer insulating shell 1, an aviation plug female head 2, a zero sequence measurement and protection integrated small iron core 3, a zero sequence secondary winding 4 and an inner insulator 5; zero sequence survey and protect integrative little iron core 3, zero sequence secondary winding and internal insulation body in external insulation casing 1, zero sequence secondary winding evenly winds zero sequence survey and protect integrative little iron core, and internal insulation body distributes external insulation casing with between the zero sequence secondary winding, there is the wire hole on the internal insulation body, has terminal outgoing in the wire hole, and terminal outgoing's one end is being connected zero sequence secondary winding, terminal outgoing's the other end is being connected the female head of aviation plug, the female head of aviation plug is the notch cuttype boss, the bottom embedding of the female head of aviation plug sets up on the lateral surface of external insulation casing. The aviation plug female head is matched with the aviation plug male head, and the aviation plug male head is connected with a detection instrument or a protection circuit.
In the above embodiment, the primary cable passes through the zero sequence measurement and protection integrated small iron core, the zero sequence secondary winding generates a secondary induced current, because one end of the outgoing line terminal is connected with the zero sequence secondary winding, and the other end of the outgoing line terminal is connected with the aviation plug, the induced current can be transmitted to an external detection instrument or a protection circuit through the outgoing line terminal and the aviation plug; because there is the defect in the structural design or the manufacturing quality of experimental receiving terminal in the secondary circuit, error or during operation in the tester work are careless, lead to the problem that terminal outgoing lines and external component are qualified for the next round of competitions by mistake easily, through the cooperation of above-mentioned aviation plug female head, aviation plug male head, can avoid the problem of being qualified for the next round of competitions by mistake, and aviation plug female head is notch cuttype boss, when the bottom embedding of aviation plug female head sets up on the lateral surface of outer insulating housing, can be better fixed with the lateral surface of outer insulating housing, have bigger installation area, be convenient for install.
Specifically, the outer insulating shell 1 is ring-shaped, the outer insulating shell 1 is engineering plastic, preferably, the engineering plastic is selected from one of ABS plastic, polyethylene, polypropylene and polyphenylpropylene, the zero sequence secondary winding 4 is uniformly wound on the zero sequence measurement and protection integrated small iron core 3, preferably, the material of the zero sequence measurement and protection integrated small iron core is amorphous alloy or permalloy, the inner insulator 5 is vacuum-encapsulated and distributed between the outer insulating shell 1 and the zero sequence secondary winding 4 by epoxy resin or polyurethane glue, which is beneficial to fixing the zero sequence secondary winding and isolating the zero sequence secondary winding 4 from oxygen in the air, so as to protect internal components from being corroded by oxygen and water vapor, the inner insulator 5 is provided with wire outlets, wire outgoing terminals are arranged in the wire outlets, the wire outgoing terminals are cylindrical, one end of the wire outgoing terminals is connected with the zero sequence secondary winding 4, the other end of the wire outgoing terminals is connected with the aircraft plug 2, the aviation plug 2 is a stepped boss, and the bottom of the aviation plug 2 is embedded in the outer side surface of the outer insulation shell 1.
Specifically, at least one pair of external terminals and at least one pair of open-circuit prevention terminals are distributed in the aviation plug female head 2 along the circumferential direction, the external terminals are connected with the open-circuit prevention terminals, and the open-circuit prevention terminals are connected with the other ends of the outgoing line terminals; the open-circuit preventing terminal comprises a first open-circuit preventing terminal 6 and a second open-circuit preventing terminal 7 which are connected, the first external terminal 8 is connected with the first open-circuit preventing terminal 6, the first open-circuit preventing terminal 6 is connected with a wire outlet terminal, the second external terminal 9 is connected with the second open-circuit preventing terminal 7, the second open-circuit preventing terminal 7 is connected with the wire outlet terminal, an insulating isolating strip 10 is arranged between the first external terminal 8 and the second external terminal 9, an insulating isolating strip 10 is arranged between the first open-circuit preventing terminal 6 and the second open-circuit preventing terminal 7, the first open-circuit preventing terminal 6 is connected with the wire outlet terminal, the second open-circuit preventing terminal 7 is connected with the wire outlet terminal, so that a circuit can be formed when the circuit is not connected with the external terminal, and the open-circuit condition of the circuit is prevented.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A zero sequence current transformer convenient to wiring area prevents function of opening a way includes:
the zero-sequence measurement and protection integrated small iron core is characterized in that the zero-sequence measurement and protection integrated small iron core, the zero-sequence secondary winding and the inner insulator are arranged in the outer insulating shell, the zero-sequence secondary winding is uniformly wound on the zero-sequence measurement and protection integrated small iron core, the inner insulator is distributed between the outer insulating shell and the zero-sequence secondary winding, a wire outlet is formed in the inner insulator, a wire outlet terminal is arranged in the wire outlet, one end of the wire outlet terminal is connected with the zero-sequence secondary winding, the other end of the wire outlet terminal is connected with the aviation plug female head, the outer insulating shell is annular, and the bottom of the aviation plug female head is embedded in the outer side face of the outer insulating shell; at least one pair of external terminals and at least one pair of open-circuit preventing terminals are distributed in the aviation plug female head along the circumferential direction, the external terminals are connected with the open-circuit preventing terminals, and the open-circuit preventing terminals are connected with the other ends of the outgoing line terminals.
2. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the pair of external terminals include first external terminal and the external terminal of second, prevent that open circuit terminal includes that the first of being connected prevents open circuit terminal and second prevents open circuit terminal, first external terminal is connected with the first open circuit terminal that prevents, the second external terminal prevents with the second that open circuit terminal is connected, first prevent open circuit terminal with the second prevents open circuit terminal and links to each other.
3. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the outer insulating shell is made of engineering plastics.
4. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 3, characterized in that: the engineering plastic is selected from one of ABS plastic, polyethylene, polypropylene and polyphenyl propylene.
5. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the zero sequence measurement and protection integrated small iron core is of a circular ring type.
6. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the inner insulator is formed by vacuum potting between the outer insulating housing and the secondary winding with epoxy resin or polyurethane glue.
7. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the zero sequence measurement and protection integrated small iron core is made of amorphous alloy or silicon steel iron core or permalloy.
8. The zero sequence current transformer convenient for wiring with an open circuit prevention function according to claim 1, characterized in that: the outlet terminal is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022804122.XU CN213844999U (en) | 2020-11-29 | 2020-11-29 | Zero sequence current transformer convenient to wiring area prevents function of opening a way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022804122.XU CN213844999U (en) | 2020-11-29 | 2020-11-29 | Zero sequence current transformer convenient to wiring area prevents function of opening a way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213844999U true CN213844999U (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022804122.XU Active CN213844999U (en) | 2020-11-29 | 2020-11-29 | Zero sequence current transformer convenient to wiring area prevents function of opening a way |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213844999U (en) |
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2020
- 2020-11-29 CN CN202022804122.XU patent/CN213844999U/en active Active
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