CN208507438U - Anti- secondary side open ended current transformer - Google Patents
Anti- secondary side open ended current transformer Download PDFInfo
- Publication number
- CN208507438U CN208507438U CN201821313641.2U CN201821313641U CN208507438U CN 208507438 U CN208507438 U CN 208507438U CN 201821313641 U CN201821313641 U CN 201821313641U CN 208507438 U CN208507438 U CN 208507438U
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- China
- Prior art keywords
- electric current
- current
- open circuit
- coil
- circuit set
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- 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.)
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims abstract description 4
- 239000003822 epoxy resin Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model relates to field of electrical equipment, provide a kind of anti-secondary side open ended current transformer, comprising: dielectric, a terminal, electric current primary coil, current ferric core, electric current secondary coil, secondary terminals and anti-open circuit set；Terminal is connect with electric current primary coil；Electric current secondary coil is wound on the current ferric core, and current ferric core passes through electric current primary coil；On the electric current secondary coil and joint defence open circuit set；Terminal, electric current primary coil, current ferric core, electric current secondary coil, secondary terminals and anti-open circuit set are integrated by dielectric casting.The material of the dielectric is low temperature resistant epoxy resin.The anti-open circuit set includes silicon-controlled device.The utility model can be realized the abnormal overvoltage protection of Current Transformer Secondary side.
Description
Technical field
The utility model relates to field of electrical equipment more particularly to a kind of anti-secondary side open ended current transformers.
Background technique
In the power system, current transformer (CT) applies the measurement and control of primary current, and electric current is mutual when normal work
Sensor secondary side is near short circuit state, and output voltage is very low.In operation if secondary winding open circuit or first winding stream
Abnormal current (such as lightning current, resonance overcurrent, capacitance charging current, inductance starting current) is crossed, can all be generated in secondary side
Thousands of volts even overvoltage of volts up to ten thousand.This not only causes damages to electrical secondary system insulation, and mutual inductor can also be made to overdrive and burn
Damage, or even jeopardize the life security of operations staff.
The not anti-function of open of conventional current mutual inductor can jeopardize the life peace of operations staff when secondary open a way
Entirely.
Utility model content
The utility model mainly solves the not anti-function of open of existing current transformer, can jeopardize when secondary open a way
The technical problems such as the life security of operations staff propose a kind of anti-secondary side open ended current transformer, can effectively prevent because
Current Transformer Secondary, which is opened a way, leads to the generation of electric power accident caused by overvoltage.
The utility model provides a kind of anti-secondary side open ended current transformer, comprising: dielectric (1), a terminal
(2), electric current primary coil (3), current ferric core (4), electric current secondary coil, secondary terminals (5) and anti-open circuit set (6)；
Terminal (2) connect with electric current primary coil (3)；
Electric current secondary coil is wound on the current ferric core (4), and current ferric core (4) passes through electric current primary coil (3)；Institute
It states on electric current secondary coil and joint defence open circuit set (6)；
Terminal (2), electric current primary coil (3), current ferric core (4), electric current secondary coil, secondary terminals (5)
It is integrated with anti-open circuit set (6) by dielectric (1) casting.
Preferably, the material of the dielectric (1) is low temperature resistant epoxy resin.
Preferably, the anti-open circuit set (6) includes silicon-controlled device.
A kind of anti-secondary side open ended current transformer provided by the utility model is installed at Current Transformer Secondary position
Anti- open circuit set can effectively prevent the generation of the electric power accident because caused by Current Transformer Secondary open circuit leads to overvoltage.
It automatically resets after troubleshooting, is not necessarily to hand-reset, device reenters normal operating conditions after circuit reinstatement state.Make electricity
Current transformer becomes safer in the case where not influencing precision, avoids safety accident.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of anti-secondary side open ended current transformer provided by the utility model.
Appended drawing reference: 1, dielectric；2, a terminal；3, electric current primary coil；4, current ferric core；5, secondary terminals；
6. anti-open circuit set.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that described herein
Specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It also should be noted that being
Convenient for description, part relevant to the utility model is illustrated only rather than full content in attached drawing.
Fig. 1 is the structural schematic diagram of anti-secondary side open ended current transformer provided by the utility model.As shown in Figure 1,
Anti- secondary side open ended current transformer provided by the embodiment of the utility model, comprising: dielectric 1, a terminal 2, electric current
Primary coil 3, current ferric core 4, electric current secondary coil, secondary terminals 5 and anti-open circuit set 6；
Terminal 2 is connect with electric current primary coil 3；
Electric current secondary coil is wound on the current ferric core 4, and current ferric core 4 passes through electric current primary coil 3；The electric current
On secondary coil and joint defence open circuit set 6.
Terminal 2, electric current primary coil 3, current ferric core 4, electric current secondary coil, secondary terminals 5 and anti-open circuit set 6
It is integrated by the casting of dielectric 1, the material of dielectric 1 is low temperature resistant epoxy resin.
Wherein, the primary element of anti-open circuit set 6 is permanent silicon-controlled device, it with never wornout in addition to soft opening
Property is closed, the quick characteristic of protection act is also had both.Anti- open circuit set 6 is parallel to Current Transformer Secondary coil both ends, normally
The voltage at silicon-controlled both ends is the product (Z2I2) of the secondary load impedance and electric current when operation, this usual value is less than 20V.This
When the silicon-controlled high-impedance state in approximate open circuit, leakage current is known as by its electric current, is less than 1mA, to the loop protection
The influence of action value and meter accuracy can be ignored.
The working principle of the anti-secondary side open ended current transformer of the utility model: it is installed at Current Transformer Secondary position
Anti- open circuit set 6 is mainly used for the abnormal overvoltage protection of Current Transformer Secondary side.It is mutual that anti-open circuit set 6 is fixed in electric current
Sensor secondary coil both ends, leakage current is minimum when normal operation, is in high-impedance state；When open circuit of secondary loop of current transformer or
When abnormal overcurrent occurs in first winding, the voltage generated in secondary winding is significantly larger than normal operating voltage, and (numerical value is depended on
Current transformer parameter itself and operating condition), at this time and 6 moment of anti-open circuit set for connecing enters on state, and electric current is mutual
Sensor secondary circuit short-circuit, to thoroughly avoid harm of the Current Transformer Secondary overvoltage to meter.Protective device can be in mistake
It presses and is reliably shorted secondary coil in the 10ms generated.It automatically resets after troubleshooting, is not necessarily to hand-reset, circuit restores former
Device reenters normal operating conditions after state.Current transformer is set to become safer in the case where not influencing precision,
Avoid safety accident.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is modified the technical solutions described in the foregoing embodiments, or to some or all of the technical features
It is equivalently replaced, the scope of the technical solutions of the embodiments of the utility model that it does not separate the essence of the corresponding technical solution.
Claims (3)
1. a kind of anti-secondary side open ended current transformer characterized by comprising dielectric (1), a terminal (2), electricity
Flow primary coil (3), current ferric core (4), electric current secondary coil, secondary terminals (5) and anti-open circuit set (6)；
Terminal (2) connect with electric current primary coil (3)；
Electric current secondary coil is wound on the current ferric core (4), and current ferric core (4) passes through electric current primary coil (3)；The electricity
Flow secondary coil on and joint defence open circuit set (6)；
Terminal (2), electric current primary coil (3), current ferric core (4), electric current secondary coil, secondary terminals (5) and anti-
Open circuit set (6) is integrated by dielectric (1) casting.
2. anti-secondary side open ended current transformer according to claim 1, which is characterized in that the dielectric (1)
Material be low temperature resistant epoxy resin.
3. anti-secondary side open ended current transformer according to claim 1, which is characterized in that the anti-open circuit set
It (6) include silicon-controlled device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821313641.2U CN208507438U (en) | 2018-08-15 | 2018-08-15 | Anti- secondary side open ended current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821313641.2U CN208507438U (en) | 2018-08-15 | 2018-08-15 | Anti- secondary side open ended current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208507438U true CN208507438U (en) | 2019-02-15 |
Family
ID=65300624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821313641.2U Expired - Fee Related CN208507438U (en) | 2018-08-15 | 2018-08-15 | Anti- secondary side open ended current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208507438U (en) |
-
2018
- 2018-08-15 CN CN201821313641.2U patent/CN208507438U/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 |