CN207067382U - 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
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- CN207067382U CN207067382U CN201720967331.1U CN201720967331U CN207067382U CN 207067382 U CN207067382 U CN 207067382U CN 201720967331 U CN201720967331 U CN 201720967331U CN 207067382 U CN207067382 U CN 207067382U
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- 238000001514 detection method Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 1
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Abstract
The utility model 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 terminal 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 both 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.The utility model additionally provides a kind of current transformer device.It is simple in construction that the utility model provides current transformer circuit supervision fail alarm detector, it is easy to accomplish.
Description
Technical field
It the utility model is related to the safety detection technology field of power system, more particularly to a kind of current transformer circuit supervision fail report
Alert detection means and the current transformer device for including 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, high voltage will be induced 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 open-circuit voltage be present 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
The utility model is intended at least solve one of technical problem present in prior art, there is provided a kind of current transformer
Break alarm detection means and the current transformer device for including the current transformer circuit supervision fail alarm detector, it is existing to solve
The problem of in technology.
As one side of the present utility model, there is provided a kind of current transformer circuit supervision fail alarm detector, wherein, institute
Stating current transformer circuit supervision fail alarm detector 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, described excessively electric
Second end of pressure control module is used to be connected with the other end of the secondary side of current transformer, the control of the excess voltage control module
End processed is connected with the signal input part of the overvoltage processing module, and the first end of the overvoltage processing module is used for and electric current
One end connection of the secondary side of transformer, the second end of the overvoltage processing module are used for and the secondary side of current transformer
The other end connects；
The excess voltage control module is used for when the voltage at the both ends for the secondary side for detecting current transformer is more than threshold value
During voltage, the control terminal output control signal of the excess voltage control module, the overvoltage processing module is used to work as the mistake
When the signal input part of voltage processing module receives the control signal, control the overvoltage processing module first end and
Second end of the overvoltage processing module instantaneously turns 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 be the excess voltage control module first end, the overvoltage relay
The other end of device coil is the second end of the excess voltage control module, one end of the over voltage relay coil and the mistake
One end connection of voltage relay normal open switch, the other end of the over voltage relay normal open switch control for the overvoltage
The control terminal of module；
Whether the voltage that the over voltage relay coil is used to detect the both ends of the secondary side of the current transformer is big
In threshold voltage, the over voltage relay normal open switch is used for when the over voltage relay Coil Detector is mutual to the electric current
The voltage at the both ends of the secondary side of sensor is instantaneously turned on output control signal when being more than threshold voltage.
Preferably, the threshold voltage is 200V.
Preferably, the delay time that the over voltage relay normal open switch instantaneously turns 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 is kept
The other end of relay be the overvoltage processing module the second end, one end of the electric current guard relay normal open switch with
The first end of the overvoltage processing module, the other end of the electric current guard relay normal open switch and the electric current keep after
One end connection of electrical equipment；
The electric current guard relay is used for when the signal input part of the electric current guard relay receives the control
During signal, the electric current guard relay normal open switch is controlled 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 instantaneously turns 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 second of the present utility model aspect, there is provided a kind of current transformer device, wherein, the current transformer
Device includes current transformer and the previously described current transformer being connected with the both ends of the secondary side of the current transformer
Break alarm detection means, the current transformer circuit supervision fail alarm detector, which can work as, detects the two of the current transformer
The voltage of secondary side forms current loop when being more than threshold voltage.
Brief description of the drawings
Accompanying drawing is to be further understood for providing to of the present utility model, and a part for constitution instruction, and following
Embodiment be used to explain the utility model together, but do not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the structure of the first embodiment of current transformer circuit supervision fail alarm detector provided by the utility model
Schematic diagram.
Fig. 2 is the structure of second of embodiment of current transformer circuit supervision fail alarm detector provided by the utility model
Schematic diagram.
Fig. 3 is the structure of the third embodiment of current transformer circuit supervision fail alarm detector provided by the utility model
Schematic diagram.
Fig. 4 is the structure of the 4th kind of embodiment of current transformer circuit supervision fail alarm detector provided by the utility model
Schematic diagram.
Fig. 5 is the structural representation of current transformer device provided by the utility model.
Embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
As one side of the present utility model, there is provided a kind of current transformer circuit supervision fail alarm detector, wherein, such as
Shown in Fig. 1, the current transformer circuit supervision fail alarm detector 10 includes：Excess voltage control module 100 and overvoltage processing mould
Block 200；
The first end B1 of the excess voltage control module 100 is used to connect with one end K1 of the secondary side of current transformer 300
Connecing, the second end B2 of the excess voltage control module 100 is used to be connected with the other end K2 of the secondary side of current transformer 300,
The control terminal of the excess voltage control module 100 is connected with the signal input part of the overvoltage processing module 100, described excessively electric
The first end of pressure processing module 200 is used to be connected with one end K1 of the secondary side of current transformer, the overvoltage processing module
200 the second end is 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 both ends for the secondary side for detecting current transformer 300 is big
When threshold voltage, the control terminal output control signal of the excess voltage control module 100, the overvoltage processing module 200
For when the signal input part of the overvoltage processing module 200 receives the control signal, controlling at the overvoltage
Second end of the first end and the overvoltage processing module 200 of managing module 200 instantaneously turns on.
Current transformer circuit supervision fail alarm detector provided by the utility model, passes through the secondary side in current transformer
Both ends connect excess voltage control module and overvoltage processing module, realize the detection of the overvoltage to 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
Advantage easy to use simple in construction, and it is simple and reliable without external power supply, realization principle.
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 be the excess voltage control module 100 first end B1, the mistake
The other end of potential relay coil 110 be the excess voltage control module 100 the second end B2, the over voltage relay line
One end of circle 110 is connected with one end of the over voltage relay normal open switch 120, the over voltage relay normal open switch
120 other end is the control terminal of the excess voltage control module 100；
The over voltage relay coil 110 is used for the voltage for detecting the both ends of the secondary side of the current transformer 300
Whether threshold voltage is more than, and the over voltage relay normal open switch 120 is used for when the over voltage relay coil 110 detects
Instantaneously turned on when voltage to the both ends of the secondary side of the current transformer 300 is more than threshold voltage with output control signal.
Realized by the structure for being used as excess voltage control module from relay coil and relay normally open switch to electric current
The Zenith tracking of transformer, have it is 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 instantaneously turns 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 be the overvoltage processing module 200 signal input part, the electricity
The other end for flowing guard relay 210 is the second end of the overvoltage processing module 200, and the electric current guard relay is normally opened
One end of switch 220 and the first end of the overvoltage processing module 200, the electric current guard relay normal open switch 220
The other 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 institute
When stating control signal, 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 returns
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 start magnetic force and are 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 instantaneously turns 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, structure to current transformer circuit supervision fail alarm detector provided by the utility model and
Operation principle is further described.B1, B2 indirect current transformer connection lead-out terminal in Fig. 4, GYJ are overvoltage relay
Device coil 110, it is 200V that it, which adjusts operation voltage, and GYJ1 is over voltage relay normal open switch 120, snap action, is delayed
100ms is returned.IBJ is electric current guard relay 210, and rated current 5A, it is 0.1A that it, which adjusts action current, and IBJ1 is electric current
Guard relay normal open switch 220, snap action, delay 100ms are returned, the electric current guard relay normal open switch 220
Maximum allowable 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 connects with K2.When current mutual inductor coil because when CT open circuits induce high voltage, GYJ relays act first, make
GYJ1 contacts act.IBJ electric currents guard relay acts after action, and after the action of IBJ1 contacts, GYJ relays return, and GYJ1 connects
Point returns.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, W1Both 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, W2Both ends be
K1 and K2, coil W2On the electric current that flows through be I2。
As second of the present utility model aspect, there is provided a kind of current transformer device, wherein, as shown in figure 5, described
Current transformer device 1 includes current transformer 300 and is connected above with the both ends of the secondary side of the current transformer 300
Described current transformer circuit supervision fail alarm detector 10, the current transformer circuit supervision fail alarm detector 10 can be when detections
Current loop is formed when being more than threshold voltage to the voltage of the secondary side of the current transformer 300.
Current transformer device provided by the utility model is alarmed as a result of previously described current transformer circuit supervision fail
Detection means, it can effectively solve the problem that the open circuit problem of current transformer, and the structure of current transformer circuit supervision fail alarm detector
Simply, it is easy to use.
It is understood that embodiment of above is merely to illustrate that principle of the present utility model and used exemplary
Embodiment, but the utility model is not limited thereto.For those skilled in the art, this is not being departed from
In the case of the spirit and essence of utility model, various changes and modifications can be made therein, and these variations and modifications are also considered as this reality
With new protection domain.
Claims (9)
- A kind of 1. 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 terminal 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 both ends for the secondary side for detecting current transformer is more than threshold voltage When, the control terminal 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 and described is controlled Second end of overvoltage processing module instantaneously turns 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 be the excess voltage control module first end, the over voltage relay line The other end of circle is the second end of the excess voltage control module, one end of the over voltage relay coil and the overvoltage 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 terminal；Whether the voltage that the over voltage relay coil is used to detect the both ends of the secondary side of the current transformer is more than threshold Threshold voltage, the over voltage relay normal open switch are used for when the over voltage relay Coil Detector to the current transformer The voltage at both ends of secondary side instantaneously turn on output control signal when being more than threshold voltage.
- 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 instantaneously turns 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 instantaneously turns 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。
- A kind of 9. 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 both ends connection of the secondary side of current transformer described in any one Detection means, the current transformer circuit supervision fail alarm detector can be when 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 |
|---|---|---|---|
| CN201720967331.1U CN207067382U (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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720967331.1U CN207067382U (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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| CN207067382U true CN207067382U (en) | 2018-03-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 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 |
-
2017
- 2017-08-04 CN CN201720967331.1U patent/CN207067382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 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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