CN209233459U - A kind of Current Transformer Secondary over-voltage protector - Google Patents
A kind of Current Transformer Secondary over-voltage protector Download PDFInfo
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- CN209233459U CN209233459U CN201821668484.7U CN201821668484U CN209233459U CN 209233459 U CN209233459 U CN 209233459U CN 201821668484 U CN201821668484 U CN 201821668484U CN 209233459 U CN209233459 U CN 209233459U
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- current transformer
- breaker
- fuse
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Abstract
The utility model relates to a kind of Current Transformer Secondary over-voltage protectors, including breaker, three-phase comprehensive type voltameter, change-over switch and fuse, voltage input end on three-phase comprehensive type voltameter passes through fuse respectively and is connected with firewire one, firewire two and firewire three, and pass through breaker and the first current transformer simultaneously, second current transformer, third current transformer is connected in series, first current transformer, second current transformer, it is parallel with one another and be connected to current input terminal simultaneously between third current transformer, power end on three-phase comprehensive type voltameter is connected separately with zero curve and fuse, incoming end on fuse respectively with change-over switch, breaker, first signal lamp, second signal lamp and third signal lamp are in parallel, change-over switch output end passes through breaker respectively and is in parallel with button and three-phase comprehensive type voltameter.The utility model has the advantages that faulty position indicating and contact point signal output after the utility model protection, facilitate troubleshooting.
Description
Technical field
The utility model relates to secondary overvoltages to protect equipment technical field, and in particular to a kind of Current Transformer Secondary mistake
Voltage protector.
Background technique
In the power system, current transformer (CT) applies the measurement and control of primary current, mutual inductor when normal work
Secondary side is near short circuit state, and output voltage is very low.In operation if secondary winding open circuit or first winding flow through it is different
Normal electric current (such as lightning current, resonance overcurrent, capacitance charging current, inductance starting current) can all generate thousands of in secondary side
The volt even overvoltage of volts up to ten thousand.This not only causes damages to electrical secondary system insulation, can also make mutual inductor too drastic and scaling loss, even
Jeopardize the life security of operations staff.According to the actual demand of electric system, Current Transmit secondary overvoltage protector is adopted
With completely new automatic control technology and high reliability element, long service life, can be action message 100,000 times or more.Movement speed
Fastly, overload capacity is strong, and static leakage currents are small, can meet the needs of various CT protections.
Existing current transformer generally connects on A, B, C three-phase, and minority connects in two-phase, connects individually in a phase,
The secondary winding in current transformer wiring overwhelming majority is star-like connection, and minority is that triangle connects, and such connection type is often
The exclusion of inconvenient failure, overvoltage protector can not carry out preparatory setting, it is impossible to meet the actual needs of different occasions,
The efficiency of work is declined.
Utility model content
The utility model aim is to provide a kind of Current Transformer Secondary over-voltage protector, provide it is a kind of convenient to use and
The safe and reliable Current Transformer Secondary overvoltage protector of system.
In order to achieve the goal above, the technical solution adopted in the utility model are as follows: a kind of Current Transformer Secondary overvoltage
Protector, including shell, terminals, relay, varistor and mounting plate, the housing bottom are fixedly connected with the installation
Plate, mounting plate top side are equipped with terminals described in equidistant arrangement, and the terminals bottom passes through voltage sensor
It is connected with the varistor, the varistor side is connected with described relay in the inner walls, described
The circuit system of shell includes breaker, three-phase comprehensive type voltameter, change-over switch and fuse, the three-phase comprehensive type electricity
Voltage input end on table passes through the fuse respectively and is connected with firewire one, firewire two and firewire three, and simultaneously by described
Breaker is connected in series with the first current transformer, the second current transformer, third current transformer, first Current Mutual Inductance
Device, the second current transformer, parallel with one another between third current transformer and be connected to current input terminal simultaneously, the three-phase is comprehensive
Power end on mould assembly voltameter is connected separately with zero curve and the fuse, the incoming end on the fuse respectively with it is described
Change-over switch, breaker, the first signal lamp, second signal lamp and third signal lamp are in parallel, the change-over switch output end point
It is not in parallel by the breaker and button and the three-phase comprehensive type voltameter.
Further, the housing exterior walls side is connected with the thermovent between the terminals and varistor.
Further, first current transformer, the second current transformer, third current transformer and the electric current are defeated
Enter and is connected separately with overvoltage protector between end.
Further, the three-phase comprehensive type voltameter picks out end and is equipped with the communication terminal being connected with the breaker.
The utility model have the technical effect that this secondary overvoltage protector be secondary winding star-like connection, it is secondary around
Group A, B, C are correspondingly connected on protector A, B, C connecting terminal, and A, B, C three-phase secondary neutral are connected to the N wiring of protector
On terminal, if only using A and B winding, C phase can not wiring will not influence the normal work of protector, 220V power supply directly connects
On protector 220V terminal, normally opened a pair is passive output terminal, is used according to actual needs for user, such electric current is mutual
Sensor secondary overvoltage protector substantially increases service performance, and faulty position indicating and contact point signal are defeated after protection
Out, facilitate troubleshooting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model Current Transformer Secondary over-voltage protector；
Fig. 2 is the wiring diagram inside the utility model Current Transformer Secondary over-voltage protector.
Appended drawing reference: 1- shell；2- terminals；3- relay；4- varistor；5- mounting plate；6- breaker；7- three-phase
Comprehensive voltameter；8- change-over switch；9- fuse；10- voltage input end；11- firewire one；12- firewire two；13- firewire three；
The first current transformer of 14-；The second current transformer of 15-；16- third current transformer；17- current input terminal；18- power supply
End；The first signal lamp of 19-；20- second signal lamp；21- third signal lamp；22- button；23- thermovent；24- overvoltage protector；
25- communication terminal.
Specific embodiment
Referring to attached drawing 1-2, a kind of Current Transformer Secondary over-voltage protector, including shell 1, terminals 2, relay 3,
Varistor 4 and mounting plate 5,1 bottom of shell are fixedly connected with the mounting plate 5,5 top side of the mounting plate installation
There are terminals 2 described in equidistant arrangement, 2 bottom of terminals is connected with the varistor 4 by voltage sensor, described
4 side of varistor is connected with described relay 3 on 1 inner wall of shell, and the circuit system of the shell 1 includes
Breaker 6, three-phase comprehensive type voltameter 7, change-over switch 8 and fuse 9, the voltage on the three-phase comprehensive type voltameter 7 are defeated
Enter end 10 and firewire 1, firewire 2 12 and firewire 3 13 are connected with by the fuse 9 respectively, and simultaneously by described disconnected
Road device 6 is connected in series with the first current transformer 14, the second current transformer 15, third current transformer 16, first electric current
It is mutual inductor 14, the second current transformer 15, parallel with one another between third current transformer 16 and be connected to current input terminal simultaneously
17, the power end 18 on the three-phase comprehensive type voltameter 7 is connected separately with zero curve and the fuse 9, the fuse 9
On incoming end respectively with the change-over switch 8, breaker 6, the first signal lamp 19, second signal lamp 20 and third signal lamp 21
It is in parallel, 8 output end of change-over switch passes through the breaker 6 and button 22 and the three-phase comprehensive type voltameter 7 respectively
It is in parallel.
Preferably, this secondary overvoltage protector is secondary winding star-like connection, and secondary winding A, B, C, which are correspondingly connected with, to be protected
It protects on device A, B, C connecting terminal, A, B, C three-phase secondary neutral are connected on the N connecting terminal of protector, if only using A and B
Winding, C phase can not wiring will not influence the normal work of protector, 220V power supply directly connects on protector 220V terminal,
Normally opened a pair is passive output terminal, is used according to actual needs for user, and such Current Transformer Secondary overvoltage is protected
Shield device substantially increases service performance, and faulty position indicating and contact point signal output, facilitate troubleshooting after protection.
Preferably, the 1 outer wall side of shell is connected with the thermovent between the terminals 2 and varistor 4
23。
Preferably, first current transformer 14, the second current transformer 15, third current transformer 16 with it is described
Overvoltage protector 24 is connected separately between current input terminal 17.
Preferably, the three-phase comprehensive type voltameter 7 picks out end and is equipped with the communication terminal 25 being connected with the breaker 6.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (4)
1. a kind of Current Transformer Secondary over-voltage protector, including shell (1), terminals (2), relay (3), varistor
(4) it is fixedly connected with the mounting plate (5) with mounting plate (5), shell (1) bottom, mounting plate (5) the top side peace
Equipped with terminals described in equidistant arrangement (2), terminals (2) bottom is connected with the varistor by voltage sensor
(4), varistor (4) side is connected with described relay (3) on the shell (1) inner wall, which is characterized in that
The circuit system of the shell (1) includes breaker (6), three-phase comprehensive type voltameter (7), change-over switch (8) and fuse
(9), the voltage input end (10) on the three-phase comprehensive type voltameter (7) is connected with firewire by the fuse (9) respectively
One (11), firewire two (12) and firewire three (13), and pass through the breaker (6) and the first current transformer (14), the simultaneously
Two current transformers (15), third current transformer (16) are connected in series, first current transformer (14), the second Current Mutual Inductance
It is parallel with one another and be connected to current input terminal (17), the three-phase comprehensive simultaneously between device (15), third current transformer (16)
Power end (18) on type voltameter (7) is connected separately with zero curve and the fuse (9), the access on the fuse (9)
End respectively with the change-over switch (8), breaker (6), the first signal lamp (19), second signal lamp (20) and third signal lamp
(21) it is in parallel, change-over switch (8) output end passes through the breaker (6) and button (22) and the three-phase comprehensive respectively
Type voltameter (7) is in parallel.
2. a kind of Current Transformer Secondary over-voltage protector according to claim 1, which is characterized in that the shell
(1) outer wall side is connected with the thermovent (23) between the terminals (2) and varistor (4).
3. a kind of Current Transformer Secondary over-voltage protector according to claim 1, which is characterized in that first electricity
Divide between current transformer (14), the second current transformer (15), third current transformer (16) and the current input terminal (17)
It is not connected with overvoltage protector (24).
4. a kind of Current Transformer Secondary over-voltage protector according to claim 1, which is characterized in that the three-phase is comprehensive
Mould assembly voltameter (7) picks out end and is equipped with the communication terminal (25) being connected with the breaker (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668484.7U CN209233459U (en) | 2018-10-15 | 2018-10-15 | A kind of Current Transformer Secondary over-voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668484.7U CN209233459U (en) | 2018-10-15 | 2018-10-15 | A kind of Current Transformer Secondary over-voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209233459U true CN209233459U (en) | 2019-08-09 |
Family
ID=67499967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821668484.7U Active CN209233459U (en) | 2018-10-15 | 2018-10-15 | A kind of Current Transformer Secondary over-voltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209233459U (en) |
-
2018
- 2018-10-15 CN CN201821668484.7U patent/CN209233459U/en active Active
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