CN208508523U - A kind of Current Transformer Secondary overvoltage protector - Google Patents
A kind of Current Transformer Secondary overvoltage protector Download PDFInfo
- Publication number
- CN208508523U CN208508523U CN201821269536.3U CN201821269536U CN208508523U CN 208508523 U CN208508523 U CN 208508523U CN 201821269536 U CN201821269536 U CN 201821269536U CN 208508523 U CN208508523 U CN 208508523U
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- China
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- protection device
- current transformer
- transformer secondary
- shell
- alarm
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Abstract
The utility model relates to a kind of Current Transformer Secondary overvoltage protectors, including shell, the front surface of shell is equipped with terminals, heat release hole bottom is fixedly connected with temperature dial plate, the control connection of the processor of temperature dial plate side and enclosure interior, processor both ends are connected separately with voltage-stablizer and relay, protector includes the end second protection device A, the second protection end device B and second protection device C-terminal, the end second protection device A, the second protection end device B and second protection device C-terminal one end are connected in corresponding secondary winding with parallel way respectively, the end second protection device A, the second protection end device B and the second protection device C-terminal other end are connected separately with Current Transformer Secondary side and are attempted by ground wire, a pair of unlimited alarm contact is connected on Current Transformer Secondary side, opening wide alarm contact is respectively that alarm output contact rating and short circuit output connect Point capacity.The utility model has the advantages that can timely preventing secondary winding open circuit abnormal current caused by safety accident.
Description
Technical field
The utility model relates to voltage protector technical fields, and in particular to a kind of Current Transformer Secondary overvoltage protection
Device.
Background technique
Current transformer protector abbreviation CT protector, in the power system, current transformer (CT) is to become high current
At defined low current, it is widely used in one-shot measurement, control and protection.It is ammeter, kilowatt-hour meter and current control system
Essential kit, when CT is worked normally, secondary side is near short circuit state, and output voltage is very low, but is running
In if secondary winding open circuit or first winding flow through abnormal current (such as lightning current, resonance overcurrent, capacitance charging current, electricity
Feel starting current, a load short circuit current etc.), thousands of volts even overvoltage of volts up to ten thousand will be generated in secondary side, this is not
It only causes damages to electrical secondary system insulation, can also make CT too drastic and scaling loss, or even jeopardize the life security of staff
Inside mutual inductor when outlet interlock circuit problem, the excessively high phenomenon of temperature can be all generated, existing product is
Heat extraction is carried out by heat release hole, is used for a long time and is easy aging, reduce the service life, the overvoltage that secondary side winding generates can not
The effect enough protected in advance, reduces usability.
Utility model content
The utility model aim is to provide a kind of Current Transformer Secondary overvoltage protector, provide a kind of control effect it is good and
Practical Current Transformer Secondary overvoltage protector.
In order to achieve the goal above, the technical solution adopted in the utility model are as follows: a kind of Current Transformer Secondary over-voltage guarantor
Device, including shell are protected, the front surface of the shell is equipped with the terminals of equidistant arrangement, and the terminals two sides, which are mounted on, to be located at
Through the heat release hole of the enclosure interior, the heat release hole bottom is fixedly connected with temperature dial plate, temperature dial plate side with
The processor of the enclosure interior controls connection, and the processor both ends are connected separately with voltage-stablizer and relay, the shell
Inside is equipped with the protector being connected with the terminals, and the protector includes the end second protection device A, the end second protection device B
With second protection device C-terminal, the end second protection device A, the second protection end device B and second protection device C-terminal one end are respectively with parallel connection
Mode is connected in corresponding secondary winding, and the end second protection device A, the second protection end device B and second protection device C-terminal are another
End is connected separately with Current Transformer Secondary side and is attempted by ground wire, is connected on the Current Transformer Secondary side a pair of spacious
Alarm contact is opened, opening wide alarm contact is respectively alarm output contact rating and short circuit output contact capacity, the Current Mutual Inductance
Device secondary side output end is connected with firewire and zero curve simultaneously.
Further, the reset button positioned at the terminals side is connected on the housing exterior walls.
Further, temperature dial plate one end is equipped with the temperature sensor being connected with the processor.
Further, the model TR/02011 of the temperature sensor.
Further, Current Transformer Secondary side one end is connected with the alarm output contact by alarm simultaneously
Capacity and short circuit output contact capacity.
The utility model has the technical effect that in current transformer operation if secondary winding open circuit or first winding
Abnormal current is flowed through, thousands of volts even overvoltage of volts up to ten thousand, at this time the temperature meeting of the inside of shell will be generated in secondary side
It increases, temperature sensor respectively passes to data on temperature dial plate and processor, then carries out electricity by voltage-stablizer and relay
Protection, while being connected on A, B and C three-phase on Current Transformer Secondary side, secondary winding A, B and corresponding connect of C-terminal are connecing
On line end, A, B, C three-phase secondary neutral (virtual earth N) are connected on the N connecting terminal of protector, if only using A, B winding, C phase
Can not wiring will not influence the normal work of protector, the cooperation of alarm output contact rating is shorted output contact capacity being capable of mistake
Capacitance passes through alarm lamp in time and gives to warn, and such Current Transformer Secondary overvoltage protector substantially increases usability
Can, control effect is good, can timely preventing secondary winding open circuit abnormal current caused by safety accident.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model Current Transformer Secondary overvoltage protector；
Fig. 2 is the diagrammatic cross-section of the positive apparent direction of the utility model Current Transformer Secondary overvoltage protector；
Fig. 3 is the wiring diagram inside the utility model Current Transformer Secondary overvoltage protector.
Appended drawing reference: 1- shell；2- terminals；3- heat release hole；4- temperature dial plate；5- processor；6- voltage-stablizer；7- relay
Device；8- protector；The end 9- second protection device A；The end 10- second protection device B；11- second protection device C-terminal；12- current transformer two
Secondary side；13- ground wire；14- alarm output contact rating；15- is shorted output contact capacity；16- firewire；17- zero curve；18- resets
Button；19- temperature sensor；20- alarm.
Specific embodiment
Referring to attached drawing 1-3, a kind of Current Transformer Secondary overvoltage protector, including shell 1, the front surface of the shell 1
Terminals 2 equipped with equidistant arrangement, 2 two sides of terminals are mounted on the heat release hole 3 being located inside the shell 1,
3 bottom of heat release hole is fixedly connected with temperature dial plate 4, the processor 5 inside 4 side of temperature dial plate and the shell 1
Control connection, 5 both ends of processor are connected separately with voltage-stablizer 6 and relay 7, are equipped with inside the shell 1 and connect with described
The protector 8 that line end 2 is connected, the protector 8 include the end second protection device A 9, the end second protection device B 10 and second protection
Device C-terminal 11, the end second protection device A 9, the end second protection device B 10 and 11 one end of second protection device C-terminal are respectively with parallel way
It is connected in corresponding secondary winding, the end second protection device A 9, the end second protection device B 10 and second protection device C-terminal 11 are another
One end is connected separately with Current Transformer Secondary side 12 and is attempted by ground wire 13, connects on the Current Transformer Secondary side 12
Have it is a pair of open wide alarm contact, open wide alarm contact and be respectively alarm output contact rating 14 and be shorted output contact capacity 15,
12 output end of Current Transformer Secondary side is connected with firewire 16 and zero curve 17 simultaneously.
Preferably, if secondary winding open circuit or first winding flow through abnormal current, Jiu Hui in current transformer operation
Secondary side generates thousands of volts even overvoltage of volts up to ten thousand, and the temperature of the inside of shell 1 can increase at this time, and temperature sensor 19 divides
Data are not passed on temperature dial plate 4 and processor 5, then overcurrent protection, while electric current are carried out by voltage-stablizer 6 and relay 7
It is connected on mutual inductor secondary side 12 on A, B and C three-phase, secondary winding A, B and C-terminal correspondence connect on terminals, A, B, C
Three-phase secondary neutral (virtual earth N) is connected on the N connecting terminal of protector, if only use A, B winding, C phase can not wiring not
Will affect the normal work of protector, the cooperation of alarm output contact rating 14 be shorted output contact capacity 15 can cross capacitance and
When give to warn by alarm lamp 20, such Current Transformer Secondary overvoltage protector substantially increases service performance, control
Effect is good, can timely preventing secondary winding open circuit abnormal current caused by safety accident.
Preferably, the reset button 18 positioned at 2 side of terminals is connected on 1 outer wall of shell.Reset button
18 be provided with restores to open a way conducive to current transformer.
Preferably, described 4 one end of temperature dial plate is equipped with the temperature sensor 19 being connected with the processor 5.
Preferably, the model TR/02011 of the temperature sensor 19.
Preferably, described 12 one end of Current Transformer Secondary side is connected with the alarm output simultaneously by alarm 20 and connects
Point capacity 14 and short circuit output contact capacity 15.
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 (5)
1. a kind of Current Transformer Secondary overvoltage protector, including shell (1), which is characterized in that the front surface of the shell (1)
Terminals (2) equipped with equidistant arrangement, terminals (2) two sides, which are mounted on, is located at dissipating through the shell (1) inside
Hot hole (3), heat release hole (3) bottom are fixedly connected with temperature dial plate (4), temperature dial plate (4) side and the shell
(1) internal processor (5) controls connection, and processor (5) both ends are connected separately with voltage-stablizer (6) and relay (7), institute
The protector (8) for being equipped with inside shell (1) and being connected with the terminals (2) is stated, the protector (8) includes second protection device
The end A (9), the end second protection device B (10) and second protection device C-terminal (11), the end second protection device A (9), second protection device B
End (10) and second protection device C-terminal (11) one end is connected in corresponding secondary winding with parallel way respectively, the secondary guarantor
The shield end device A (9), the end second protection device B (10) and second protection device C-terminal (11) other end are connected separately with Current Transformer Secondary
Side (12) and be attempted by ground wire (13), be connected on the Current Transformer Secondary side (12) it is a pair of open wide alarm contact, open
It opens alarm contact to be respectively alarm output contact rating (14) and be shorted output contact capacity (15), the Current Transformer Secondary
Side (12) output end is connected with firewire (16) and zero curve (17) simultaneously.
2. a kind of Current Transformer Secondary overvoltage protector according to claim 1, which is characterized in that the shell (1)
The reset button (18) positioned at the terminals (2) side is connected on outer wall.
3. a kind of Current Transformer Secondary overvoltage protector according to claim 1, which is characterized in that the temperature dial plate
(4) one end is equipped with the temperature sensor (19) being connected with the processor (5).
4. a kind of Current Transformer Secondary overvoltage protector according to claim 3, which is characterized in that the temperature sensing
The model TR/02011 of device (19).
5. a kind of Current Transformer Secondary overvoltage protector according to claim 1, which is characterized in that the Current Mutual Inductance
Device secondary side (12) one end is connected with the alarm output contact rating (14) simultaneously by alarm (20) and is shorted output and connect
Point capacity (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821269536.3U CN208508523U (en) | 2018-08-08 | 2018-08-08 | A kind of Current Transformer Secondary overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821269536.3U CN208508523U (en) | 2018-08-08 | 2018-08-08 | A kind of Current Transformer Secondary overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208508523U true CN208508523U (en) | 2019-02-15 |
Family
ID=65300469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821269536.3U Expired - Fee Related CN208508523U (en) | 2018-08-08 | 2018-08-08 | A kind of Current Transformer Secondary overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208508523U (en) |
-
2018
- 2018-08-08 CN CN201821269536.3U patent/CN208508523U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 Termination date: 20200808 |