CN109116284A - Current mutual inductor testing apparatus and method - Google Patents
Current mutual inductor testing apparatus and method Download PDFInfo
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- CN109116284A CN109116284A CN201810737410.2A CN201810737410A CN109116284A CN 109116284 A CN109116284 A CN 109116284A CN 201810737410 A CN201810737410 A CN 201810737410A CN 109116284 A CN109116284 A CN 109116284A
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- 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
Abstract
The invention belongs to electric power detection device technical field, a kind of current mutual inductor testing apparatus and method are provided.Described device includes: electric current supply module, is connect suitable for the primary side with current transformer, exports predetermined current for inputting according to user to the current transformer；Detection module, it is connect suitable for the secondary side with current transformer, for obtaining the predetermined current in the current information of the secondary side of the current transformer, judges whether the current information meets preset condition, the current transformer information is determined according to judging result.The present invention is divided into two modules, so that bulk loop does not need not needing special storage and transport using long cable when checking, the cost of construction equipment is effectively reduced, and reduce the security risk of personnel's low-voltage electric shock, while having saved manpower and working time.
Description
Technical field
The invention belongs to electric power detection device technical fields, are to be related to a kind of current transformer detection dress more specifically
It sets and method.
Background technique
Current transformer by the high current of primary circuit it is directly proportional be transformed to secondary low current be supplied to measuring instrumentss,
The equipment such as relay protection, to realize the detection, protection or automatic control of electric system, the pole of the secondary winding of current transformer
Property need according to measuring instrumentss or protect equipment requirement carry out selection access, otherwise can cause measuring error or protection misoperation
Situations such as occur, therefore, electric system relay protection secondary circuit debugging in, the loop polarity inspection of electric current secondary winding
It is extremely important.So not only wanting whether verificating current mutual inductor primary side meets the requirements in construction, verificating current mutual inductor is also wanted
Whether the polar orientation of second loop return wiring meets protection or the requirement of measuring device.
In practical Commissioning of Relay Protection installation process, the tests such as polar orientation of current transformer are using dedicated
Current transformer tester is verified, but dedicated tester needs use longer when checking the bulk loop of current transformer
Cable removes the primary side and secondary side of connection current transformer respectively, causes equipment fragmentary in disorder, and tester belongs to accurate instrument
Special safeguard measure is needed among device, storage and transport, increases testing cost；If carrying out Current Mutual Inductance using dry cell
The polar verification of device, the frequent Damage by Short Circuit of battery unprotect, and operate and need more people's compounding practices, waste of manpower.
Summary of the invention
In consideration of it, the present invention provides a kind of current mutual inductor testing apparatus and method, it is intended to solve it is in the prior art specially
Current transformer tester connecting cable when detecting the bulk loop of current transformer is longer, and palpus special protection, makes
At expensive, dry cell detects easy Damage by Short Circuit when current transformer, and the problem of labor intensive.
The first aspect of the embodiment of the present invention provides a kind of current mutual inductor testing apparatus, comprising: electric current supply module
And detection module；
The electric current supply module, connect suitable for the primary side with current transformer, for being inputted according to user to described
Current transformer exports predetermined current；
The detection module exists suitable for connecting with the secondary side of the current transformer for obtaining the predetermined current
The current information of the secondary side of the current transformer, judges whether the current information meets preset condition, is tied according to judgement
Fruit determines the current transformer information.
Optionally, the electric current supply module includes: control element, electric current output element and circuit protection unit；
The control element, first end are connect with the first end of the electric current output element, and second end and the circuit are protected
Protect the first end connection of unit, the connection for the electric current supply module circuit according to user's input control；
The electric current output element, second end is suitable for connecting with the primary side of current transformer, for mutual to the electric current
Sensor exports predetermined current；
The second end of the circuit protection unit is suitable for connecting with the primary side of current transformer.
Optionally, the circuit protection unit includes: current monitoring device, circuit connection alarm device and variable resistance；
The first end of the current monitoring device is connect with the first end of the circuit protection unit, the current monitoring dress
The second end set is connect with the first end that the circuit connects alarm device, and the circuit connects second end and the institute of alarm device
The first end connection of variable resistance is stated, the second end of the variable resistance is connect with the second end of the circuit protection unit.
Optionally, the detection module includes: information acquisition unit and judging unit；
The information acquisition unit is believed for obtaining the predetermined current in the electric current of the secondary side of the current transformer
Breath；
The judging unit determines institute according to judging result for judging whether the current information meets preset condition
State current transformer information；
The current transformer information includes: polarity, current transformer ratio and the current transformer of current transformer
At least one of wiring information.
Optionally, the current information includes: current value and current direction information；
The preset condition includes: current value preset range and direction preset range；
The judging unit is specifically used for:
Judge whether the current value meets the current value preset range, and judges whether the current direction information accords with
Direction preset range is closed, determines that the wiring of the polarity and the current transformer of the current transformer is believed according to judging result
Breath；Or
The current transformer ratio is determined according to the ratio between value of the current value and the predetermined current.
Optionally, the detection module is also used to:
The current information of preset times is obtained within a preset time；
When judging that the current information meets the number of preset condition equal to the preset times, sent to default terminal
It stops working after closing the information of electric current supply module.
Optionally, the electric current supply module further include: timing unit；
The timing unit exports the predetermined current to the current transformer in the preset time for controlling
Number.
The second aspect of the embodiment of the present invention provides a kind of current transformer detection method, is suitable for including that electric current is supplied
The current mutual inductor testing apparatus of module and detection module, the electric current supply module are suitable for connecting with the primary side of current transformer
It connects, the detection module is suitable for connecting with the secondary side of the current transformer, comprising:
The electric current supply module inputs to the current transformer according to user and exports predetermined current；
The detection module obtains the predetermined current in the current information of the secondary side of the current transformer；
The detection module judges whether the current information meets preset condition, and determines the electricity according to judging result
Current transformer information.
Optionally, the current transformer information includes: that polarity, current transformer ratio and the electric current of current transformer are mutual
At least one of wiring information of sensor；
The current information includes: current value and current direction information；
The preset condition includes: current value preset range and direction preset range；
It is described to judge whether the current information meets preset condition, determine that the current transformer is believed according to judging result
Breath includes:
Judge whether the current value meets the current value preset range and obtain the first judging result；
Judge whether the current direction information meets direction preset range and obtain the second judging result；
The polarity of the current transformer and described is determined according to first judging result and second judging result
The wiring information of current transformer；Or
The current transformer ratio is determined according to the ratio between value of the current value and the predetermined current.
Optionally, the current transformer detection method further include:
The detection module obtains the current information of preset times within a preset time；
The detection module judge the current information meet preset condition number be equal to the preset times when, to
Default terminal stops working after sending the information for closing electric current supply module.
The beneficial effect of current mutual inductor testing apparatus and method compared with prior art is in the embodiment of the present invention: will
Current mutual inductor testing apparatus is divided into electric current supply module and detection module, so that when checking the bulk loop of current transformer not
Need using long cable, while the internal components of electric current supply module and detection module are simple, do not need to carry out special storage and
Transport, is effectively reduced the cost of construction equipment；Electric current supply module automatically provides low-tension current, reduces the safety of personnel's electric shock
Hidden danger, while detection module judges automatically the information such as current transformer polarity, has saved the working time of electric power personnel.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram for the current mutual inductor testing apparatus that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram for another current mutual inductor testing apparatus that the embodiment of the present invention one provides；
Fig. 3 is the implementation process schematic diagram of current transformer detection method provided by Embodiment 2 of the present invention；
Fig. 4 is the implementation process schematic diagram of step 303 in Fig. 3 provided by Embodiment 2 of the present invention；
Fig. 5 is the implementation process schematic diagram of another current transformer detection method provided by Embodiment 2 of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Embodiment one
Referring to Fig. 1 and Fig. 2, a kind of current mutual inductor testing apparatus provided in an embodiment of the present invention, including electric current supply mould
Block 100 and detection module 200.
Wherein, electric current supply module 100 is suitable for connecting with the primary side of current transformer；Electric current supply module 100 is used for
It is inputted according to user to the current transformer and exports predetermined current.
Detection module 200 is suitable for connecting with the secondary side of the current transformer；Detection module 200 is described pre- for obtaining
If electric current judges whether the current information meets preset condition, root in the current information of the secondary side of the current transformer
It is judged that result determines the current transformer information.
In concrete application, for the current mutual inductor testing apparatus of the present embodiment when detecting current transformer, electric current supplies mould
Block 100 is connect with the primary side of current transformer, is formed into a loop with the primary side of current transformer；Detection module 200 with it is described
The secondary side of current transformer connects, and is formed into a loop with the secondary side of current transformer, reduces current mutual inductor testing apparatus
The waste of connecting cable when detecting current transformer, connection is simple, improves detection speed；User's control electric current supply module 100
Start simultaneously with detection module 200, electric current supply module 100 then exports predetermined current, detection module to the current transformer
200 obtain the current information of the secondary side of the current transformer, judge whether the current information meets preset condition, such as
The size for judging sense of current and electric current automatically determines the current transformer information according to judging result, has saved work
Personnel time, while improving current transformer detection accuracy.
Wherein, the predetermined current is low-tension current, current information be the predetermined current by current transformer at than
The information for the electric current that example becomes smaller.
Optionally, the current transformer information can also be sent to the default of staff's setting by detection module 200
Terminal, such as mobile phone or computer etc. also avoid work people so that staff checks the detection case of detection current transformer
Member must check detection information at the scene, dally over one's work the time.
Optionally, detection module 200 can also have touch display screen, show the Current Mutual Inductance by touch display screen
Device information, so that staff checks the detection case of detection current transformer, and staff can be shown by touching
Screen control detection module 200 obtains the frequency of the current information, while touch display screen is also used to show detection module 200
The connection status of connecting pin and the connecting pin of current transformer, so remind staff detect current transformer when whether route
It connects intact, avoids damaging the device of equipment or detection because of connection problem.
Current mutual inductor testing apparatus is divided into electric current supply module 100 and detection by above-mentioned current mutual inductor testing apparatus
Module 200 does not need when so that checking the bulk loop of current transformer using long cable, while 100 He of electric current supply module
The internal components of detection module 200 are simple, do not need to carry out special storage and transport, the cost of construction equipment is effectively reduced；Electricity
Stream supply module 100 automatically provides low-tension current, reduces the security risk of personnel's electric shock, while detection module 200 is sentenced automatically
The information such as current transformer polarity are powered off, the working time of electric power personnel has been saved.
Further, Fig. 2 is referred to, in one embodiment, electric current supply module 100 includes: control element 110, electric current
Output element 120 and circuit protection unit 130.
Wherein, the first end of control element 110 is connect with the first end of electric current output element 120, and the of control element 110
Two ends are connect with the first end of circuit protection unit 130；Control element 110 is used for according to user's input control electric current supply module
The connection of 100 circuits, when user's operation control element 110 starts, then electric current supply module 100 and current transformer primary side
The circuit of formation is connected.Optionally, control element 110 can be switch element, be also possible to realize other devices of correlation function
Part, such as contactor.
The second end of electric current output element 120 is suitable for connecting with the primary side of current transformer；Electric current output element 120 is used
In to the current transformer export predetermined current.Optionally, electric current output element 120 can be rechargeable storage battery, with
Guarantee that electric current supply module 100 can be to provide predetermined current for current transformer in the case where being not connected to power supply, the company of reduction
Cable is connect, current mutual inductor testing apparatus is simplified.
Optionally, electric current supply module 100 further includes battery capacity indication lamp.Battery capacity indication lamp is used to indicate electric current output element
120 electricity reminds the electricity in staff's electric current output element 120 by the brightness of battery capacity indication lamp, so that work
Personnel charge in time in electric current 120 not enough power supply of output element.
The second end of circuit protection unit 130 is suitable for connecting with the primary side of current transformer；Circuit protection unit 130 is used
In the circuit that protective current supply module 100 and current transformer primary side are formed, short circuit is prevented, is avoided because of electric current output member
The excessive damage circuit of 120 transient current of part and current transformer.
Optionally, referring to fig. 2, circuit protection unit 130 includes: current monitoring device 131, circuit connection alarm device
132 and variable resistance 133.
The first end of current monitoring device 131 is connect with the first end of circuit protection unit 130, current monitoring device 131
Second end and circuit connect the first end of alarm device 132 and connect, circuit connect alarm device 132 second end and can power transformation
The first end connection of resistance 133, the second end of variable resistance 133 are connect with the second end of circuit protection unit 130.
Current monitoring device 131 can be with the circuit that monitoring current supply module 100 and current transformer primary side are formed
Size of current avoids electric current excessive or too small, while can prompt staff's electric current supply module 100 and current transformer one
Whether secondary side connects, and passes through the cooperation with variable resistance 133, adjustable electric current supply module 100 and Current Mutual Inductance
The size of current in the circuit that device primary side is formed, reaches predetermined current.Optionally, current monitoring device 131 can be ammeter,
Or multimeter etc. can show the current display device of size of current.
Circuit connects alarm device 132 and is used to indicate time that electric current supply module 100 and current transformer primary side are formed
Road is connected, and has electric current to pass through, and is reminded staff's circuit connection normal, is guaranteed that the detection process of current transformer is normal.It is optional
, circuit, which connects alarm device 132, can be indicator light, be also possible to alarm device, such as buzzer etc..
Variable resistance 133 is used to adjust the electric current in the circuit that electric current supply module 100 and current transformer primary side are formed
Size, while can protect circuit, prevent electric current excessive.Before control element 110 is not closed, variable resistance 133 is by resistance
It is transferred to maximum, is that the electric current in circuit reaches predetermined current by adjusting resistance value after control element 110 is closed.
Optionally, electric current supply module 100 further include: timing unit 140.
Timing unit 140 exports the predetermined current to the current transformer in the preset time for controlling
Number.
Specifically, timing unit can control the open and close of control element 110, to control electric current output element
120 will not export always electric current, save electricity.Meanwhile the default terminal that timing unit 140 can also be set with staff connects
It connects, staff can manipulate timing unit by terminal remote and control control element 110, can not only reduce staff's touching
The risk of electricity, also provides convenience for staff.
Above-mentioned electric current supply module 100, internal components are simple, do not need to carry out special storage and transport, are effectively reduced and apply
The cost of construction equipment is arranged independent electric current output element 120, reduces the use of connecting cable, while reducing staff's touching
The danger of electricity, the circuit that 130 protective current supply module 100 of circuit protection unit is formed with current transformer primary side, guarantees
Stablizing for detection process carries out, and improves detection efficiency.
Further, referring to fig. 2, in one embodiment, detection module 200 includes: that information acquisition unit 210 and judgement are single
Member 220.
Wherein, information acquisition unit 210 is for obtaining the predetermined current in the electricity of the secondary side of the current transformer
Stream information；Judging unit 220 determines the electricity according to judging result for judging whether the current information meets preset condition
Current transformer information.
Optionally, the current transformer information includes: that polarity, current transformer ratio and the electric current of current transformer are mutual
At least one of wiring information of sensor.The wiring information of the current transformer refers to current transformer wiring in the loop
Whether whether correct or wiring is normal.
Optionally, the current information includes: current value and current direction information.
Optionally, the preset condition includes: current value preset range and direction preset range.
Judging unit 220 is specifically used for: judging whether the current value meets the current value preset range and obtain first
Judging result, judges whether the current direction information meets direction preset range and obtain the second judging result, according to described
One judging result and second judging result determine the polarity of the current transformer and the wiring letter of the current transformer
Breath.
Alternatively, judging unit 220 determines the Current Mutual Inductance according to the ratio between value of the current value and the predetermined current
Device no-load voltage ratio.Meanwhile can also determine whether the wiring of current transformer is correct according to the current transformer ratio.
Illustratively, when the current value meets the current value preset range, illustrate that detection module 200 and electric current are mutual
The secondary side wiring of sensor is intact, after the secondary side wiring for judging detection module 200 and current transformer is intact, judges electric current
Directional information, when the current direction information meets direction preset range, i.e., current direction is positive, it is determined that connection electric current is mutual
The polarity of the secondary side of sensor is positive polarity, if current direction is negative, it is determined that connect the pole of the secondary side of current transformer
Property is negative polarity, and the polarity of the secondary side and protective relaying device that also illustrate current transformer is reversed.
Illustratively, the current value for the Current Transformer Secondary side that information acquisition unit 210 obtains is 200mA, and electric current is mutual
The electric current of the primary side of sensor is 20A, then according to the ratio between the current value and the value of the predetermined current, i.e. 200mA/20A=
1/100, then illustrate that the current transformer ratio is 100.It should be understood that above-mentioned is only to the no-load voltage ratio for how determining current transformer
It is illustrated, is not that the no-load voltage ratio of the current value to Current Transformer Secondary side, predetermined current and current transformer is defined.
Optionally, information acquisition unit 210 can be the integrated circuit that obtains current information, and judging unit 220 can also be with
For single-chip microcontroller or microprocessor etc..
Optionally, detection module 200 is also used to:
The current information of preset times is obtained within a preset time.
When judging that the current information meets the number of preset condition equal to the preset times, sent to default terminal
It stops working after closing the information of electric current supply module.
Specifically, electric current can not preserve value always stable state when being influenced by the external world in the detection process, it is a certain
The current information of secondary detection may not have representativeness, so the detection module 200 of the present embodiment obtains the electric current of preset times
Information specifically obtains the current information of preset times within a preset time, guarantees detection convenient for repeated detection current information
Accuracy.Meanwhile if it is determined that then illustrating electricity when the number that the current information meets preset condition is equal to the preset times
The polarity of current transformer it has been determined that and wiring it is correct, then detection module 200 sends to default terminal and closes electric current supply module
It stops working after information, to remind the polarity inspected of staff's current transformer to finish, closes electric current in time and supply mould
Block 100 saves electricity, and detection module 200 stops working after having sent the information for reminding closing electric current supply module 100, saves
Electric energy is saved, the manual operation of staff is reduced.
Wherein, the default terminal is that staff matches and connect, the default end with the realization of detection module 200
End can be the mobile phone of staff, be also possible to common computer, and detection module 200 can by the information for closing electric current supply module
It sends, can also be sent directly in the popular software in default terminal in the form of through short message.Default terminal and detection module
200 can be wireless connection, be also possible to wired connection.
Detection module 300 can judge automatically polarity, wiring condition and the no-load voltage ratio of the current transformer of detection, can make
Staff can need not obtain testing result at the scene, can do other work when detecting, save staff's
Plenty of time；It is interrupted acquisition current information simultaneously, guarantees the correctness of detection, be automatically closed after having judged the information such as polarity,
Electric energy is saved, staff's excessive manual operation time is reduced.
In above-described embodiment, current mutual inductor testing apparatus is divided into electric current supply module 100 and detection module 200, is made
It is not needed when must check the bulk loop of current transformer using long cable, while electric current supply module 100 and detection module 200
Internal components it is simple, do not need to carry out special storage and transport, the cost of construction equipment be effectively reduced；Electric current supply module
100 automatically provide low-tension current, reduce the security risk of personnel's electric shock, while detection module 200 judges automatically Current Mutual Inductance
The information such as device polarity, and personnel on site's monitoring is not needed, save the working time of electric power personnel.
Embodiment two
Corresponding to the current mutual inductor testing apparatus in embodiment one, a kind of current transformer detection is present embodiments provided
Method.Referring to Fig. 3, the implementation process schematic diagram of current transformer detection method is provided, details are as follows:
S301, the electric current supply module input to the current transformer according to user and export predetermined current.
Optionally, electric current supply module also controls described default to current transformer output in the preset time
The number of electric current will not export always electric current to control electric current supply element, save electricity.Meanwhile electric current supply module is also
Can with staff set default terminal connect, staff can by terminal remote manipulate electric current supply module disconnection or
Conducting can not only reduce the risk of staff's electric shock, also provide convenience for staff.
S302, the detection module obtain the predetermined current in the current information of the secondary side of the current transformer.
S303, the detection module judge whether the current information meets preset condition, determine institute according to judging result
State current transformer information.
Wherein, the current transformer information includes: polarity, current transformer ratio and the Current Mutual Inductance of current transformer
At least one of wiring information of device；Current information includes: current value and current direction information.
The preset condition includes: current value preset range and direction preset range.
Further, referring to fig. 4, in one embodiment, judge whether the current information accords with described in step S303
Preset condition is closed, the specific implementation process for determining the current transformer information according to judging result includes:
S401, judges whether the current value meets the current value preset range and obtain the first judging result.
S402, judges whether the current direction information meets direction preset range and obtain the second judging result.
S403, according to first judging result and second judging result determine the current transformer polarity and
The wiring information of the current transformer.
When the current value meets the current value preset range, illustrate the secondary side of detection module and current transformer
Wiring is intact, after the secondary side wiring for judging detection module and current transformer is intact, current direction information is judged, when described
When current direction information meets direction preset range, i.e., current direction is positive, it is determined that connects the secondary side of current transformer
Polarity is positive polarity, if current direction is negative, it is determined that the polarity for connecting the secondary side of current transformer is negative polarity, is also said
The secondary side of bright current transformer and the polarity of protective relaying device are reversed.
Alternatively, determining the current transformer ratio according to the ratio between value of the current value and the predetermined current.
Illustratively, the current value for the Current Transformer Secondary side that information acquisition unit 210 obtains is 200mA, and electric current is mutual
The electric current of the primary side of sensor is 20A, then according to the ratio between the current value and the value of the predetermined current, i.e. 200mA/20A=
1/100, then illustrate that the current transformer ratio is 100.It should be understood that above-mentioned is only to the no-load voltage ratio for how determining current transformer
It is illustrated, is not that the no-load voltage ratio of the current value to Current Transformer Secondary side, predetermined current and current transformer is defined.
Optionally, can also determine whether the wiring of current transformer is correct according to the current transformer ratio.
Optionally, the current transformer information can also be sent to the default of staff's setting by detection module 200
Terminal, such as mobile phone or computer etc. also avoid work people so that staff checks the detection case of detection current transformer
Member must check detection information at the scene, dally over one's work the time.
Optionally, detection module can also show the current transformer information, so that staff checks detection electric current
The detection case of mutual inductor, and staff can control the frequency that detection module obtains the current information, while also aobvious
Show the connection status of the connecting pin of detection module and the connecting pin of current transformer, and then staff is reminded to detect Current Mutual Inductance
Whether connection is intact when device, avoids damaging the device of equipment or detection because of connection problem.
Further, referring to Fig. 5, in a kind of embodiment, the current transformer detection method further include:
S501, the detection module obtain the current information of preset times within a preset time.
S502, the detection module judge the current information meet preset condition number be equal to the preset times
When, it stops working after the information for closing electric current supply module is sent to default terminal.
Detection module obtains the current information of preset times, specifically obtains the electric current letter of preset times within a preset time
Breath guarantees the accuracy of detection convenient for repeated detection current information.Meanwhile if it is determined that the current information meets preset condition
Number be equal to the preset times when, then illustrate the polarity of current transformer it has been determined that and wiring it is correct, then detection module to
Default terminal stops working after sending the information for closing electric current supply module, to remind the polarity of staff's current transformer
Inspected finishes, and closes electric current supply module in time, saves electricity, after having sent the information for reminding closing electric current supply module
Detection module stops working, and saves electric energy, reduces the manual operation of staff.
Detection module can send the information that close electric current supply module by short message form, can also be sent directly to
In popular software in default terminal.
In above-described embodiment, current mutual inductor testing apparatus is divided into electric current supply module and detection module, so that checking
It is not needed when the bulk loop of current transformer using long cable, while the letter of the internal components of electric current supply module and detection module
It is single, it does not need to carry out special storage and transport, the cost of construction equipment is effectively reduced；Electric current supply module automatically provides low tension
Stream reduces the security risk of personnel's electric shock, while detection module judges automatically the information such as current transformer polarity, and does not need
Personnel on site's monitoring, has saved the working time of electric power personnel.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed system and method can pass through others
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the module or unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be with
In conjunction with or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of current mutual inductor testing apparatus characterized by comprising electric current supply module and detection module；
The electric current supply module, connect suitable for the primary side with current transformer, for being inputted according to user to the electric current
Mutual inductor exports predetermined current；
The detection module, suitable for being connect with the secondary side of the current transformer, for obtaining the predetermined current described
The current information of the secondary side of current transformer, judges whether the current information meets preset condition, true according to judging result
The fixed current transformer information.
2. current mutual inductor testing apparatus as described in claim 1, which is characterized in that the electric current supply module includes: control
Element, electric current output element and circuit protection unit processed；
The control element, first end are connect with the first end of the electric current output element, second end and the circuit protection list
The first end connection of member, the connection for the electric current supply module circuit according to user's input control；
The electric current output element, second end are suitable for connecting with the primary side of current transformer, be used for the current transformer
Export predetermined current；
The second end of the circuit protection unit is suitable for connecting with the primary side of current transformer.
3. current mutual inductor testing apparatus as claimed in claim 2, which is characterized in that the circuit protection unit includes: electricity
Flow monitoring device, circuit connects alarm device and variable resistance；
The first end of the current monitoring device is connect with the first end of the circuit protection unit, the current monitoring device
The first end that second end and the circuit connect alarm device connect, the circuit connect the second end of alarm device with it is described can
The first end connection of power transformation resistance, the second end of the variable resistance are connect with the second end of the circuit protection unit.
4. current mutual inductor testing apparatus as described in claim 1, which is characterized in that the detection module includes: that information obtains
Take unit and judging unit；
The information acquisition unit, for obtaining the predetermined current in the current information of the secondary side of the current transformer；
The judging unit determines the electricity according to judging result for judging whether the current information meets preset condition
Current transformer information；
The current transformer information includes: the wiring of the polarity, current transformer ratio and current transformer of current transformer
At least one of information.
5. current mutual inductor testing apparatus as claimed in claim 4, which is characterized in that the current information includes: current value
With current direction information；
The preset condition includes: current value preset range and direction preset range；
The judging unit is specifically used for:
Judge whether the current value meets the current value preset range, and judge the current direction information whether the side of meeting
To preset range, the polarity of the current transformer and the wiring information of the current transformer are determined according to judging result；Or
Person
The current transformer ratio is determined according to the ratio between value of the current value and the predetermined current.
6. such as current mutual inductor testing apparatus described in any one of claim 1 to 5, which is characterized in that the detection module is also
For:
The current information of preset times is obtained within a preset time；
When judging that the current information meets the number of preset condition equal to the preset times, sends and close to default terminal
It stops working after the information of electric current supply module.
7. current mutual inductor testing apparatus as claimed in claim 6, which is characterized in that the electric current supply module further include:
Timing unit；
The timing unit, for controlling time for exporting the predetermined current to the current transformer in the preset time
Number.
8. a kind of current transformer detection method, suitable for including the current transformer detection of electric current supply module and detection module
Device, the electric current supply module are suitable for connecting with the primary side of current transformer, and the detection module is suitable for and the electric current
The secondary side of mutual inductor connects, which is characterized in that the described method includes:
The electric current supply module inputs to the current transformer according to user and exports predetermined current；
The detection module obtains the predetermined current in the current information of the secondary side of the current transformer；
The detection module judges whether the current information meets preset condition, determines the Current Mutual Inductance according to judging result
Device information.
9. current transformer detection method as claimed in claim 8, which is characterized in that the current transformer information includes:
At least one of polarity, current transformer ratio and wiring information of current transformer of current transformer；
The current information includes: current value and current direction information；
The preset condition includes: current value preset range and direction preset range；
It is described to judge whether the current information meets preset condition, the current transformer packet is determined according to judging result
It includes:
Judge whether the current value meets the current value preset range and obtain the first judging result；
Judge whether the current direction information meets direction preset range and obtain the second judging result；
According to first judging result and second judging result determine the current transformer polarity and the electric current
The wiring information of mutual inductor；Or
The current transformer ratio is determined according to the ratio between value of the current value and the predetermined current.
10. such as the described in any item current transformer detection methods of claim 8 to 9, which is characterized in that the current transformer
Detection method further include:
The detection module obtains the current information of preset times within a preset time；
The detection module is when judging that the current information meets the number of preset condition and is equal to the preset times, to default
Terminal stops working after sending the information for closing electric current supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737410.2A CN109116284A (en) | 2018-07-06 | 2018-07-06 | Current mutual inductor testing apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737410.2A CN109116284A (en) | 2018-07-06 | 2018-07-06 | Current mutual inductor testing apparatus and method |
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| Publication Number | Publication Date |
|---|---|
| CN109116284A true CN109116284A (en) | 2019-01-01 |
Family
ID=64822882
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810737410.2A Pending CN109116284A (en) | 2018-07-06 | 2018-07-06 | Current mutual inductor testing apparatus and method |
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|---|---|
| CN (1) | CN109116284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253185A (en) * | 2021-06-03 | 2021-08-13 | 武汉磐电科技股份有限公司 | Current transformer calibration method, device, equipment and storage medium |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
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| CN201163291Y (en) * | 2008-02-22 | 2008-12-10 | 上海思创电器设备有限公司 | Multifunctional transformation ratio test device |
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| CN113253185A (en) * | 2021-06-03 | 2021-08-13 | 武汉磐电科技股份有限公司 | Current transformer calibration method, device, equipment and storage medium |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
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Application publication date: 20190101 |