CN107315157A - A kind of current transformer circuit supervision fail alarm detector and current transformer device - Google Patents
A kind of current transformer circuit supervision fail alarm detector and current transformer device Download PDFInfo
- Publication number
- CN107315157A CN107315157A CN201710659603.6A CN201710659603A CN107315157A CN 107315157 A CN107315157 A CN 107315157A CN 201710659603 A CN201710659603 A CN 201710659603A CN 107315157 A CN107315157 A CN 107315157A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- relay
- electric current
- overvoltage
- processing module
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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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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
Abstract
The invention discloses a kind of current transformer circuit supervision fail alarm detector, wherein, including：Excess voltage control module and overvoltage processing module；The first end of excess voltage control module is used to be connected with one end of the secondary side of current transformer, second end is used to be connected with the other end of the secondary side of current transformer, control end is connected with the signal input part of overvoltage processing module, the first end of overvoltage processing module is used to be connected with one end of the secondary side of current transformer, and the second end is used to be connected with the other end of the secondary side of current transformer；Excess voltage control module is used for when the voltage for detecting the two ends of secondary side of current transformer is more than threshold voltage, output control signal, overvoltage processing module is used to control the first end of overvoltage processing module and the second end instantaneously to turn on when receiving a control signal.Present invention also offers a kind of current transformer device.It is simple in construction that the present invention provides current transformer circuit supervision fail alarm detector, it is easy to accomplish.
Description
Technical field
The present invention relates to the safety detection technology field of power system, more particularly to a kind of alarm inspection of current transformer circuit supervision fail
Survey device and include the current transformer device of the current transformer circuit supervision fail alarm detector.
Background technology
Measuring and controlling in power system is when gathering power network high-voltage transmission equipment, it is necessary to use current transformer.
High current in high-voltage fence is converted into safe low current by current transformer.When Current Transformer Secondary side because various originals
Cause, when opening a way, will induce high voltage in secondary side, it is possible to hinder by equipment burnout or by personnel's electricity.
In the prior art, it is general to detect whether there is open-circuit voltage using CPU processor, controllable silicon is controlled by CPU element
Module is protected to current transformer.But it is of the prior art it is this by CPU processor judge current transformer open a way
Mode it is complicated.
Therefore, how to provide a kind of detection means for judging current transformer open circuit simple in construction turns into art technology
Personnel's technical problem urgently to be resolved hurrily.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art, there is provided a kind of current transformer circuit supervision fail
Alarm detector and the current transformer device for including the current transformer circuit supervision fail alarm detector, to solve prior art
Middle the problem of.
As the first aspect of the invention there is provided a kind of current transformer circuit supervision fail alarm detector, wherein, the electricity
Current transformer break alarm detection means includes：Excess voltage control module and overvoltage processing module；
The first end of the excess voltage control module is used to be connected with one end of the secondary side of current transformer, the overvoltage control
Second end of molding block is used to be connected with the other end of the secondary side of current transformer, the control end of the excess voltage control module
It is connected with the signal input part of the overvoltage processing module, the first end of the overvoltage processing module is used for and Current Mutual Inductance
One end connection of the secondary side of device, the second end of the overvoltage processing module is for another with the secondary side of current transformer
End connection；
The excess voltage control module is used for when the voltage at the two ends for the secondary side for detecting current transformer is more than threshold voltage
When, the control end output control signal of the excess voltage control module, the overvoltage processing module is used to work as the overvoltage
When the signal input part of processing module receives the control signal, the first end of the overvoltage processing module is controlled and described
Second end of overvoltage processing module is instantaneously turned on.
Preferably, the excess voltage control module includes over voltage relay coil and over voltage relay normal open switch；
One end of the over voltage relay coil is the first end of the excess voltage control module, the over voltage relay line
The other end of circle is the second end of the excess voltage control module, one end and the overvoltage of the over voltage relay coil
One end connection of relay normally open switch, the other end of the over voltage relay normal open switch is the excess voltage control module
Control end；
The over voltage relay coil is used to detect whether the voltage at the two ends of the secondary side of the current transformer to be more than threshold
Threshold voltage, the over voltage relay normal open switch is used for when the over voltage relay Coil Detector to the current transformer
Secondary side two ends voltage be more than threshold voltage when instantaneously turn on output control signal.
Preferably, the threshold voltage is 200V.
Preferably, the delay time that the over voltage relay normal open switch is instantaneously turned on is 100ms.
Preferably, the overvoltage processing module includes electric current guard relay and electric current guard relay normal open switch；
One end of the electric current guard relay is the signal input part of the overvoltage processing module, and the electric current keeps relay
The other end of device be the overvoltage processing module the second end, one end of the electric current guard relay normal open switch with it is described
The first end of overvoltage processing module, the other end of the electric current guard relay normal open switch and the electric current guard relay
One end connection；
The electric current guard relay is used for when the signal input part of the electric current guard relay receives the control signal
When, control the electric current guard relay normal open switch instantaneously to turn on.
Preferably, the rated current of the electric current guard relay is 5A, the return current of the electric current guard relay
For 0.1A.
Preferably, the delay time that the electric current guard relay normal open switch is instantaneously turned on is 100ms.
Preferably, the rated current of the electric current guard relay normal open switch is 5A, and the electric current guard relay is normal
The maximum allowable cut-out electric current of switch is 0.3A.
As the second aspect of the invention there is provided a kind of current transformer device, wherein, the current transformer device
The previously described current transformer circuit supervision fail being connected including current transformer and with the two ends of the secondary side of the current transformer
Alarm detector, the current transformer circuit supervision fail alarm detector can work as the secondary side for detecting the current transformer
Voltage be more than threshold voltage when form current loop.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
The structural representation of the first embodiment of the current transformer circuit supervision fail alarm detector that Fig. 1 provides for the present invention.
The structural representation of second of embodiment of the current transformer circuit supervision fail alarm detector that Fig. 2 provides for the present invention
Figure.
The structural representation of the third embodiment of the current transformer circuit supervision fail alarm detector that Fig. 3 provides for the present invention
Figure.
The structural representation of 4th kind of embodiment of the current transformer circuit supervision fail alarm detector that Fig. 4 provides for the present invention
Figure.
The structural representation for the current transformer device that Fig. 5 provides for the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As the first aspect of the invention there is provided a kind of current transformer circuit supervision fail alarm detector, wherein, such as Fig. 1
Shown, the current transformer circuit supervision fail alarm detector 10 includes：Excess voltage control module 100 and overvoltage processing module
200；
The first end B1 of the excess voltage control module 100 is used to be connected with one end K1 of the secondary side of current transformer 300, institute
Stating the second end B2 of excess voltage control module 100 is used to be connected with the other end K2 of the secondary side of current transformer 300, the mistake
The control end of voltage control module 100 is connected with the signal input part of the overvoltage processing module 100, the overvoltage processing
The first end of module 200 is used to be connected with one end K1 of the secondary side of current transformer, and the of the overvoltage processing module 200
Two ends are used to be connected with the other end K2 of the secondary side of current transformer；
The excess voltage control module 100 is used for when the voltage at the two ends for the secondary side for detecting current transformer 300 is more than threshold
During threshold voltage, the control end output control signal of the excess voltage control module 100, the overvoltage processing module 200 is used for
When the signal input part of the overvoltage processing module 200 receives the control signal, the overvoltage processing mould is controlled
Second end of the first end of block 200 and the overvoltage processing module 200 is instantaneously turned on.
The current transformer circuit supervision fail alarm detector that the present invention is provided, passes through the two ends of the secondary side in current transformer
Connect excess voltage control module and overvoltage processing module, realize the detection to the overvoltage of the secondary side of current transformer and
The open circuit harm of current transformer is eliminated when detecting high voltage, this current transformer circuit supervision fail alarm detector has structure
Simple advantage easy to use, and without external power supply, realization principle is simple and reliable.
As a kind of specifically embodiment, as shown in Fig. 2 the excess voltage control module 100 includes overvoltage relay
Device coil 110 and over voltage relay normal open switch 120；
One end of the over voltage relay coil 110 is the first end B1 of the excess voltage control module 100, the overvoltage
The other end of relay coil 110 is the second end B2 of the excess voltage control module 100, the over voltage relay coil
110 one end is connected with one end of the over voltage relay normal open switch 120, the over voltage relay normal open switch 120
The other end be the excess voltage control module 100 control end；
Whether the voltage at the two ends of secondary side of the over voltage relay coil 110 for detecting the current transformer 300
More than threshold voltage, the over voltage relay normal open switch 120 is used for when the over voltage relay coil 110 detects institute
The voltage for stating the two ends of the secondary side of current transformer 300 is instantaneously turned on output control signal when being more than threshold voltage.
By being realized from relay coil and relay normally open switch as the structure of excess voltage control module to electric current
The Zenith tracking of transformer, with simple in construction, it is easy to accomplish advantage.
Preferably, the threshold voltage is 200V.
Preferably, the delay time that the over voltage relay normal open switch is instantaneously turned on is 100ms.
As another specifically embodiment, as shown in figure 3, the overvoltage processing module 200 is kept including electric current
Relay 210 and electric current guard relay normal open switch 220；
One end of the electric current guard relay 210 is the signal input part of the overvoltage processing module 200, and the electric current is protected
The other end for holding relay 210 is the second end of the overvoltage processing module 200, the electric current guard relay normal open switch
The first end of 220 one end and the overvoltage processing module 200, the electric current guard relay normal open switch 220 it is another
End is connected with one end of the electric current guard relay 210；
The electric current guard relay 210 is used for when the signal input part of the electric current guard relay 210 receives the control
During signal processed, the electric current guard relay normal open switch 220 is controlled instantaneously to turn on.
Preferably, the rated current of the electric current guard relay 210 is 5A, and the electric current guard relay 210 is returned
Stream of wiring back is 0.1A.
It should be noted that for electric current relay, when starting current reaches certain numerical value, coil starts magnetic force and is more than bullet
Spring force and intrinsic mechanical resistance, contact action are connected, and electric current at this moment is referred to as starting current.After startup, when electric current drops to
Certain numerical value, coil starts magnetic force and is less than spring force plus intrinsic mechanical resistance, and relay contact action disconnects, electricity at this moment
Stream is referred to as return current.
Preferably, the delay time that the electric current guard relay normal open switch 220 is instantaneously turned on is 100ms.
Preferably, the rated current of the electric current guard relay normal open switch 220 is 5A, the electric current guard relay
The maximum allowable cut-out electric current of normal open switch 220 is 0.3A.
With reference to shown in Fig. 4, the structure of the current transformer circuit supervision fail alarm detector provided the present invention and work
Principle is further described.B1, B2 indirect current transformer connection lead-out terminal in Fig. 4, GYJ are over voltage relay line
Circle 110, it adjusts operation voltage for 200V, and GYJ1 is over voltage relay normal open switch 120, and snap action, delay 100ms is returned
Return.IBJ is electric current guard relay 210, and rated current is 5A, and it adjusts action current for 0.1A, IBJ1 be electric current keep after
Electrical equipment normal open switch 220, snap action, delay 100ms is returned, and the maximum of the electric current guard relay normal open switch 220 permits
Perhaps cut-out electric current is 0.3A, rated current 5A.
Specifically, the coil of B1 and B2 indirect current transformer 300, i.e. B1 and B2 respectively with the current transformer
300 K1 and K2 connection.When current mutual inductor coil because when CT open circuits induce high voltage, GYJ relays are acted first, are made
GYJ1 contacts are acted.IBJ electric currents guard relay is acted after action, and after the action of IBJ1 contacts, GYJ relays are returned, and GYJ1 connects
Point is returned.The secondary winding of current transformer forms new current loop by IBJ relays and IBJ1 contacts, eliminates CT open circuits
Harm.
It should be noted that as shown in figure 4, the coil of the primary side of the current transformer 300 is W1, W1Two ends be
L1 and L2, coil W1On the electric current that flows through be I1, the coil of the secondary side of the current transformer 300 is W2, W2Two ends be
K1 and K2, coil W2On the electric current that flows through be I2。
As the second aspect of the invention there is provided a kind of current transformer device, wherein, as shown in figure 5, the electric current
Transformer device 1 include current transformer 300 and be connected with the two ends of the secondary side of the current transformer 300 it is described previously
Current transformer circuit supervision fail alarm detector 10, the current transformer circuit supervision fail alarm detector 10, which can work as, detects institute
The voltage for stating the secondary side of current transformer 300 forms current loop when being more than threshold voltage.
The current transformer device that the present invention is provided is as a result of previously described current transformer circuit supervision fail alarm detection
Device, can effectively solve the problem that the open circuit problem of current transformer, and current transformer circuit supervision fail alarm detector is simple in construction,
It is easy to use.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of current transformer circuit supervision fail alarm detector, it is characterised in that the current transformer circuit supervision fail alarm detection dress
Put including：Excess voltage control module and overvoltage processing module；
The first end of the excess voltage control module is used to be connected with one end of the secondary side of current transformer, the overvoltage control
Second end of molding block is used to be connected with the other end of the secondary side of current transformer, the control end of the excess voltage control module
It is connected with the signal input part of the overvoltage processing module, the first end of the overvoltage processing module is used for and Current Mutual Inductance
One end connection of the secondary side of device, the second end of the overvoltage processing module is for another with the secondary side of current transformer
End connection；
The excess voltage control module is used for when the voltage at the two ends for the secondary side for detecting current transformer is more than threshold voltage
When, the control end output control signal of the excess voltage control module, the overvoltage processing module is used to work as the overvoltage
When the signal input part of processing module receives the control signal, the first end of the overvoltage processing module is controlled and described
Second end of overvoltage processing module is instantaneously turned on.
2. current transformer circuit supervision fail alarm detector according to claim 1, it is characterised in that the overvoltage control
Module includes over voltage relay coil and over voltage relay normal open switch；
One end of the over voltage relay coil is the first end of the excess voltage control module, the over voltage relay line
The other end of circle is the second end of the excess voltage control module, one end and the overvoltage of the over voltage relay coil
One end connection of relay normally open switch, the other end of the over voltage relay normal open switch is the excess voltage control module
Control end；
The over voltage relay coil is used to detect whether the voltage at the two ends of the secondary side of the current transformer to be more than threshold
Threshold voltage, the over voltage relay normal open switch is used for when the over voltage relay Coil Detector to the current transformer
Secondary side two ends voltage be more than threshold voltage when instantaneously turn on output control signal.
3. current transformer circuit supervision fail alarm detector according to claim 2, it is characterised in that the threshold voltage is
200V。
4. current transformer circuit supervision fail alarm detector according to claim 2, it is characterised in that the overvoltage relay
The delay time that device normal open switch is instantaneously turned on is 100ms.
5. current transformer circuit supervision fail alarm detector as claimed in any of claims 1 to 4, it is characterised in that
The overvoltage processing module includes electric current guard relay and electric current guard relay normal open switch；
One end of the electric current guard relay is the signal input part of the overvoltage processing module, and the electric current keeps relay
The other end of device be the overvoltage processing module the second end, one end of the electric current guard relay normal open switch with it is described
The first end of overvoltage processing module, the other end of the electric current guard relay normal open switch and the electric current guard relay
One end connection；
The electric current guard relay is used for when the signal input part of the electric current guard relay receives the control signal
When, control the electric current guard relay normal open switch instantaneously to turn on.
6. current transformer circuit supervision fail alarm detector according to claim 5, it is characterised in that the electric current keep after
The rated current of electrical equipment is 5A, and the return current of the electric current guard relay is 0.1A.
7. current transformer circuit supervision fail alarm detector according to claim 5, it is characterised in that the electric current keep after
The delay time that electrical equipment normal open switch is instantaneously turned on is 100ms.
8. current transformer circuit supervision fail alarm detector according to claim 5, it is characterised in that the electric current keep after
The rated current of electrical equipment normal open switch is 5A, and the maximum allowable cut-out electric current of the electric current guard relay normal open switch is
0.3A。
9. a kind of current transformer device, it is characterised in that the current transformer device include current transformer and with it is described
Current transformer circuit supervision fail alarm in the claim 1 to 8 of the two ends connection of the secondary side of current transformer described in any one
Detection means, the current transformer circuit supervision fail alarm detector can work as the electricity for the secondary side for detecting the current transformer
Pressure forms current loop when being more than threshold voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659603.6A CN107315157A (en) | 2017-08-04 | 2017-08-04 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659603.6A CN107315157A (en) | 2017-08-04 | 2017-08-04 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107315157A true CN107315157A (en) | 2017-11-03 |
Family
ID=60170468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710659603.6A Pending CN107315157A (en) | 2017-08-04 | 2017-08-04 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
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| Country | Link |
|---|---|
| CN (1) | CN107315157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087428A1 (en) * | 2021-11-19 | 2023-05-25 | 广东福德电子有限公司 | New secondary wire break protection apparatus for current transformer |
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| CN103326342A (en) * | 2013-06-07 | 2013-09-25 | 江苏博斯特科技电力有限公司 | Open circuit prevention device of current transformer |
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| CN204964738U (en) * | 2015-09-22 | 2016-01-13 | 国网电网公司 | Current transformer secondary circuit precaution device of opening a way |
| CN105870880A (en) * | 2016-03-28 | 2016-08-17 | 国网天津市电力公司 | Intelligent protection system for secondary open circuit of current transformer |
| CN207067382U (en) * | 2017-08-04 | 2018-03-02 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
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2017
- 2017-08-04 CN CN201710659603.6A patent/CN107315157A/en active Pending
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| JPH10144540A (en) * | 1996-11-07 | 1998-05-29 | Toshiba Corp | Secondary open circuit protective equipment of current transformer |
| JP2007214462A (en) * | 2006-02-10 | 2007-08-23 | Samsung Measuring Instruments Co Ltd | Open circuit sensor of current transformer secondary terminal |
| KR100849480B1 (en) * | 2007-08-08 | 2008-07-31 | 주식회사 남전사 | Apparatus and method for detecting the current transformer's coil disconnection of electronic electricity meters |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087428A1 (en) * | 2021-11-19 | 2023-05-25 | 广东福德电子有限公司 | New secondary wire break protection apparatus for current transformer |
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