CN110261726A - A kind of discharge coil polarity test device - Google Patents
A kind of discharge coil polarity test device Download PDFInfo
- Publication number
- CN110261726A CN110261726A CN201910676291.9A CN201910676291A CN110261726A CN 110261726 A CN110261726 A CN 110261726A CN 201910676291 A CN201910676291 A CN 201910676291A CN 110261726 A CN110261726 A CN 110261726A
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- test module
- winding
- discharge coil
- secondary winding
- input terminal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of discharge coil polarity test devices, including low-frequency voltage, and module, first winding test module and secondary winding test module occurs；The both ends that module occurs for the low-frequency voltage are connected with the both ends of the first winding of discharge coil respectively；The both ends of the first winding test module are connected with the both ends of the first winding of discharge coil respectively, and the both ends of the secondary winding test module are connected with the both ends of the secondary winding of discharge coil respectively.Module occurs with low-frequency voltage by the first winding of discharge coil to be connected, to make to apply low-frequency ac voltage signal in first winding, and then make to generate induced voltage in secondary winding, and by the operating status of observation first winding test module and secondary winding test module, and then judge the polarity of discharge coil.
Description
Technical field
The present invention relates to detection technique field more particularly to a kind of discharge coil polarity test devices.
Background technique
Discharge coil is the voltage acquisition unit for constituting capacitor differential pressure or unstable voltage protection, when capacitor discharge line
It will lead to false protection when enclosing polarity wiring error.
The mode for the wiring for removing discharge coil first winding and secondary winding is mostly used to connect to detect discharge coil at present
Whether the polarity wiring of line is wrong, since capacitor surrounding space is narrow, dismounts discharge coil first winding and secondary winding is taken
When it is laborious, testing efficiency is low, and increase connecting terminal damage risk.
Summary of the invention
The embodiment of the invention provides a kind of discharge coil polarity test device and methods, it is intended to which solution is not being removed at present
The problem of being unable to measure discharge coil polarity in the case where the first winding and secondary winding of discharge coil.
The embodiment of the invention provides a kind of discharge coil polarity test device, including module, primary occurs for low-frequency voltage
Winding test module and secondary winding test module；
The both ends that module occurs for the low-frequency voltage are connected with the both ends of the first winding of discharge coil respectively；It is described primary
The both ends of winding test module are connected with the both ends of the first winding of discharge coil respectively, and the two of the secondary winding test module
End is connected with the both ends of the secondary winding of discharge coil respectively；
The low-frequency voltage occurs module and generates low-frequency ac voltage signal, and the low-frequency ac voltage signal is transmitted
To the first winding and the first winding test module；The secondary winding of the discharge coil passes through in the first winding
Low-frequency ac voltage signal generate induced voltage, and the induced voltage is transmitted to secondary winding test module；Described one
The operating status of the operating status of secondary winding test module and the secondary winding test module, for determining the discharge coil
Polarity test result.
In embodiments herein, the first winding test module includes that the first partial pressure unit and the first display are single
Member；
The input terminal of first partial pressure unit is the input terminal of the first winding test module, and first partial pressure is single
The output end of member is connected with the input terminal of first display unit, the output end of first display unit for it is described once around
The output end of group test module.
In embodiments herein, first partial pressure unit includes resistance R1；
The first end of the resistance R1 is the input terminal of first partial pressure unit, and the second end of the resistance R1 is described
The output end of first partial pressure unit.
In embodiments herein, first display unit includes first diode and the first light emitting diode；
The anode of the cathode of the first diode and first light emitting diode connects to form the first display list altogether
The cathode of the input terminal of member, the anode of the first diode and first light emitting diode connects to form first display altogether
The output end of unit.
In embodiments herein, the secondary winding test module includes that the second partial pressure unit and the second display are single
Member；
The input terminal of second partial pressure unit is the input terminal of the secondary winding test module, and second partial pressure is single
The output end of member is connected with the input terminal of second display unit, the output end of second display unit for it is described it is secondary around
The output end of group test module.
In embodiments herein, second partial pressure unit includes resistance R2；
The first end of the resistance R2 is the input terminal of second partial pressure unit, and the second end of the resistance R2 is described
The output end of second partial pressure unit.
In embodiments herein, second display unit includes the second diode and the second light emitting diode；
The anode of the cathode of second diode and second light emitting diode connects to form the second display list altogether
The cathode of the input terminal of member, the anode of second diode and second light emitting diode connects to form second display altogether
The output end of unit.
It further include box body in embodiments herein, the first winding test module and secondary winding test module
It is arranged in box body；The box body includes upper cover body and lower cover, and the upper cover body is connected by a snap with lower cover；On described
Lid is equipped with peep hole, and the operating status of first winding test module and secondary winding test module is observed by peep hole,
The upper cover body is equipped with the first wiring hole, the second wiring hole, third wiring hole and the 4th wiring hole, in first wiring hole
Input terminal equipped with first winding test module, the interior output end for being equipped with first winding test module of second wiring hole, institute
The input terminal for being equipped with secondary winding test module in third wiring hole is stated, secondary winding is equipped in the 4th wiring hole and tests mould
The output end of block.
In embodiments herein, first wiring hole is equipped with the first connecting terminal, first winding test module
Input terminal be connected with first connecting terminal, second wiring hole be equipped with the second connecting terminal, first winding test
The output end of module is connected with second connecting terminal, and the third wiring hole is equipped with third connecting terminal, secondary winding
The input terminal of test module is connected with the third connecting terminal, and the 4th wiring hole is equipped with the 4th connecting terminal, secondary
The output end of winding test module is connected with the 4th connecting terminal.
In embodiments herein, the box body is equipped with for the box body to be fixed on the fixing clamp on cross-arm,
The fixing clamp is connected through a screw thread with the box body.
The present invention occurs module with low-frequency voltage by the first winding of discharge coil and is connected, low to apply in first winding
Frequency ac voltage signal, and then make to generate induced voltage in secondary winding, and pass through observation first winding test module and secondary
The operating status of winding test module, and then judge the secondary winding of discharge coil and the polarity of secondary winding.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without any creative labor, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the structural schematic diagram for the discharge coil polarity test device that one embodiment of the present of invention provides；
The structural schematic diagram of the circuit of first winding test module in Fig. 1 that Fig. 2 provides for one embodiment of the present of invention；
The structural schematic diagram of the circuit of secondary winding test module in Fig. 1 that Fig. 3 provides for one embodiment of the present of invention；
Fig. 4 is the structural schematic diagram of the box body for the discharge coil polarity test device that one embodiment of the present of invention provides；
Fig. 5 is the fixed folder structure schematic diagram for the discharge coil polarity test device that one embodiment of the present of invention provides
One；
Fig. 6 is the fixed folder structure schematic diagram for the discharge coil polarity test device that one embodiment of the present of invention provides
Two.
Wherein: 1, discharge coil；110, module occurs for low-frequency voltage；120, first winding test module；130, it is secondary around
Group test module；121, the first partial pressure unit；122, the first display unit；131, the second partial pressure unit；132, the second display is single
Member；2, upper cover body；3, lower cover；4, peep hole；5, the first connecting terminal；6, the second connecting terminal；7, third connecting terminal；8,
4th connecting terminal；9, fixing clamp；10, connecting rod；11, anchorage bar.
Specific embodiment
In order to make those skilled in the art more fully understand this programme, below in conjunction with attached in this programme embodiment
Figure, is explicitly described the technical solution in this programme embodiment, it is clear that described embodiment is this programme a part
Embodiment, instead of all the embodiments.Based on the embodiment in this programme, those of ordinary skill in the art are not being made
The range of this programme protection all should belong in every other embodiment obtained under the premise of creative work.
The specification and claims of this programme and term " includes " and other any deformations in above-mentioned attached drawing are
Refer to " including but not limited to ", it is intended that cover and non-exclusive include.In addition, term " first " and " second " etc. are for distinguishing
Different objects, not for description particular order.
Realization of the invention is described in detail below in conjunction with specific attached drawing:
Fig. 1 shows a kind of discharge coil polarity test device provided by one embodiment of the invention, for ease of description,
Only parts related to embodiments of the present invention are shown, and details are as follows:
As shown in Figure 1, mould occurs for discharge coil polarity test device provided by the embodiment of the present invention, including low-frequency voltage
Block 110, first winding test module 120 and secondary winding test module 130；
The both ends that module 110 occurs for the low-frequency voltage are connected with the both ends of the first winding of discharge coil 1 respectively；It is described
The both ends of first winding test module 120 are connected with the both ends of the first winding of discharge coil 1 respectively, the secondary winding test
The both ends of module 130 are connected with the both ends of the secondary winding of discharge coil 1 respectively；
The low-frequency voltage occurs module 110 and generates low-frequency ac voltage signal, and by the low-frequency ac voltage signal
It is transmitted to the first winding and the first winding test module 120；The secondary winding of the discharge coil 1 passes through described one
Low-frequency ac voltage signal on secondary winding generates induced voltage, and the induced voltage is transmitted to secondary winding test module
130；The operating status of the operating status of the first winding test module 120 and the secondary winding test module 130, is used for
Determine the polarity test result of the discharge coil 1.
In the embodiment of the present invention, module 110 is occurred with low-frequency voltage by the first winding of discharge coil 1 and is connected, makes one
Apply low-frequency ac voltage signal on secondary winding, and then make to generate induced voltage in secondary winding, and passes through observation first winding
The operating status of test module 120 and secondary winding test module 130, and then judge the polarity of discharge coil 1.
In the present embodiment, if the operating status phase of first winding test module 120 and secondary winding test module 130
Together, then the first winding of discharge coil 1 and the polarity of secondary winding are identical；If first winding test module 120 and secondary winding
The operating status of test module 130 is not identical, then the first winding of discharge coil 1 and the polarity of secondary winding are opposite.
In an embodiment of the present invention, first winding test module 120 includes that the first partial pressure unit 121 and the first display are single
Member 122；
The input terminal of first partial pressure unit 121 be the first winding test module 120 input terminal, described first
The output end of partial pressure unit 121 is connected with the input terminal of first display unit 122, first display unit 122 it is defeated
Outlet is the output end of the first winding test module 120.
In the present embodiment, the operating status of first winding test module 120 is observed by the first display unit 122.
In an embodiment of the present invention, the first partial pressure unit 121 includes resistance R1；
The first end of the resistance R1 is the input terminal of first partial pressure unit 121, and the second end of the resistance R1 is
The output end of first partial pressure unit 121.
In an embodiment of the present invention, the first display unit 122 includes first diode D1 and the first light emitting diode
LED1；
The cathode of the first diode D1 and the anode of first Light-emitting diode LED 1 connect to form described first altogether
The input terminal of display unit 122, the anode of the first diode D1 and the cathode of first Light-emitting diode LED 1 connect altogether
Form the output end of first display unit 122.
In an embodiment of the present invention, secondary winding test module 130 includes that the second partial pressure unit 131 and the second display are single
Member 132；
The input terminal of second partial pressure unit 131 be the secondary winding test module 130 input terminal, described second
The output end of partial pressure unit 131 is connected with the input terminal of second display unit 132, second display unit 132 it is defeated
Outlet is the output end of the secondary winding test module 130.
In an embodiment of the present invention, the second partial pressure unit 131 includes resistance R2；
The first end of the resistance R2 is the input terminal of second partial pressure unit 131, and the second end of the resistance R2 is
The output end of second partial pressure unit 131.
In an embodiment of the present invention, the second display unit 132 includes the second diode D2 and the second light emitting diode
LED2；
The cathode of the second diode D2 and the anode of second Light-emitting diode LED 2 connect to form described second altogether
The input terminal of display unit 132, the anode of the second diode D2 and the cathode of second Light-emitting diode LED 2 connect altogether
Form the output end of second display unit 132.
In a particular application, the both ends that module 110 occurs for low-frequency voltage are separately connected the two of the first winding of discharge coil 1
End, the first end of resistance R1 are connected with the positive voltage input terminal of the first winding of discharge coil 1, the first Light-emitting diode LED 1
Cathode is connected with the negative voltage input terminal of the first winding of discharge coil 1, the first end of resistance R2 and discharge coil 1 it is secondary around
The first end of group is connected, and the cathode of the second Light-emitting diode LED 2 is connected with the second end of the secondary winding of discharge coil 1.
If the first Light-emitting diode LED 1 and the second Light-emitting diode LED 2 are bright simultaneously, then it represents that the one of discharge coil 1
Secondary winding and secondary winding are same-phase, that is, the first winding of discharge coil 1 and the polarity of secondary winding it is identical, polarity is just
Really；If the first Light-emitting diode LED 1 and the second Light-emitting diode LED 2 replace shinny, then it represents that discharge coil 1 it is primary around
Group and secondary winding are antiphase, that is, the first winding of discharge coil 1 and the polarity of secondary winding it is different, incorrect polarity.
It in an embodiment of the present invention, further include box body, the first winding test module 120 and secondary winding test mould
Block 130 is arranged in box body；The box body includes upper cover body 2 and lower cover 3, and the upper cover body 2 is connected with lower cover 3 by buckle
It connects；The upper cover body 2 is equipped with peep hole 4, observes first winding test module 120 by peep hole 4 and secondary winding is tested
The operating status of module 130, the upper cover body 2 are equipped with the first wiring hole, the second wiring hole, third wiring hole and the 4th wiring
Hole is equipped with the input terminal of first winding test module 120 in first wiring hole, be equipped in second wiring hole once around
The output end of group test module 120, is equipped with the input terminal of secondary winding test module 130 in the third wiring hole, and described the
The output end of secondary winding test module 130 is equipped in four wiring holes.
In the present embodiment, upper cover body 2 and lower cover 3 can be dismantled, and be convenient for changing first winding test module 120 and two
Secondary winding test module 130.
In the present embodiment, peep hole 4 can be two, and a peep hole 4 is used to observe the first Light-emitting diode LED 1,
Another peep hole 4 is for observing the second Light-emitting diode LED 2.
In an embodiment of the present invention, the first wiring hole is equipped with the first connecting terminal 5, first winding test module 120
Input terminal be connected with first connecting terminal 5, second wiring hole be equipped with the second connecting terminal 6, first winding survey
The output end of die trial block 120 is connected with second connecting terminal 6, the third wiring hole be equipped with third connecting terminal 7, two
The input terminal of secondary winding test module 130 is connected with the third connecting terminal 7, and the 4th wiring hole is equipped with the 4th wiring
Terminal 8, the output end of secondary winding test module 130 are connected with the 4th connecting terminal 8.
In the present embodiment, setting connecting terminal is conveniently connected with discharge coil 1 in order to facilitate external wire.
In an embodiment of the present invention, box body is equipped with the fixing clamp 9 for being fixed on the box body on cross-arm, described
Fixing clamp 9 is connected through a screw thread with the box body.
In the present embodiment, it is equipped with connecting hole on the face of the front, rear, left and right of box body four, is equipped with screw thread in connecting hole,
Facilitate according to the connecting hole that selection is suitble to the case where environment where capacitor.
In the present embodiment, fixing clamp 9 is U-clamp, and U-clamp is connected with box body by connecting rod 10.It is set in connecting rod 10
There is screw thread, the side clamping plate of U-clamp is equipped with anchorage bar 11, and anchorage bar 11 passes through a clamping plate, extend between two clamping plates.
In the present embodiment, connecting rod 10 can be straight-bar and be also possible to connect into there are two straight-bar, and two straight
Bar is connected in an angle of 90 degrees.
In the present embodiment, one end of two clamping plates of U-clamp is connected, and the end that is not attached to of two clamping plates is equipped with hook,
The present apparatus is mounted on cross-arm or on crossbeam when the present apparatus convenient to use.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, 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.
Claims (10)
1. a kind of discharge coil polarity test device, which is characterized in that module occurs including low-frequency voltage, first winding tests mould
Block and secondary winding test module；
The both ends that module occurs for the low-frequency voltage are connected with the both ends of the first winding of discharge coil respectively；The first winding
The both ends of test module are connected with the both ends of the first winding of discharge coil respectively, the both ends point of the secondary winding test module
It is not connected with the both ends of the secondary winding of discharge coil；
The low-frequency voltage occurs module and generates low-frequency ac voltage signal, and the low-frequency ac voltage signal is transmitted to institute
State first winding and the first winding test module；The secondary winding of the discharge coil passes through low in the first winding
Frequency ac voltage signal generates induced voltage, and the induced voltage is transmitted to secondary winding test module；It is described once around
The operating status of group test module and the operating status of the secondary winding test module, for determining the pole of the discharge coil
Property test result.
2. discharge coil polarity test device as described in claim 1, which is characterized in that the first winding test module packet
Include the first partial pressure unit and the first display unit；
The input terminal of first partial pressure unit is the input terminal of the first winding test module, first partial pressure unit
Output end is connected with the input terminal of first display unit, and the output end of first display unit is first winding survey
The output end of die trial block.
3. discharge coil polarity test device as claimed in claim 2, which is characterized in that first partial pressure unit includes electricity
Hinder R1；
The first end of the resistance R1 is the input terminal of first partial pressure unit, and the second end of the resistance R1 is described first
The output end of partial pressure unit.
4. discharge coil polarity test device as claimed in claim 2, which is characterized in that first display unit includes the
One diode and the first light emitting diode；
The anode of the cathode of the first diode and first light emitting diode connects to form first display unit altogether
The cathode of input terminal, the anode of the first diode and first light emitting diode connects to form first display unit altogether
Output end.
5. discharge coil polarity test device as described in claim 1, which is characterized in that the secondary winding test module packet
Include the second partial pressure unit and the second display unit；
The input terminal of second partial pressure unit is the input terminal of the secondary winding test module, second partial pressure unit
Output end is connected with the input terminal of second display unit, and the output end of second display unit is secondary winding survey
The output end of die trial block.
6. discharge coil polarity test device as claimed in claim 5, which is characterized in that second partial pressure unit includes electricity
Hinder R2；
The first end of the resistance R2 is the input terminal of second partial pressure unit, and the second end of the resistance R2 is described second
The output end of partial pressure unit.
7. discharge coil polarity test device as claimed in claim 5, which is characterized in that second display unit includes the
Two diodes and the second light emitting diode；
The anode of the cathode of second diode and second light emitting diode connects to form second display unit altogether
The cathode of input terminal, the anode of second diode and second light emitting diode connects to form second display unit altogether
Output end.
8. discharge coil polarity test device as described in claim 1, which is characterized in that further include box body, it is described once around
Group test module and secondary winding test module are arranged in box body；The box body includes upper cover body and lower cover, it is described on
Lid is connected by a snap with lower cover；The upper cover body is equipped with peep hole, observes first winding by peep hole and tests mould
The operating status of block and secondary winding test module, the upper cover body are equipped with the first wiring hole, the second wiring hole, third wiring
Hole and the 4th wiring hole, are equipped with the input terminal of first winding test module in first wiring hole, in second wiring hole
Output end equipped with first winding test module, the interior input terminal for being equipped with secondary winding test module of the third wiring hole, institute
State the output end that secondary winding test module is equipped in the 4th wiring hole.
9. discharge coil polarity test device as claimed in claim 8, which is characterized in that first wiring hole is equipped with the
One connecting terminal, the input terminal of first winding test module are connected with first connecting terminal, set on second wiring hole
There is the second connecting terminal, the output end of first winding test module is connected with second connecting terminal, the third wiring hole
It is equipped with third connecting terminal, the input terminal of secondary winding test module is connected with the third connecting terminal, and the described 4th connects
String holes is equipped with the 4th connecting terminal, and the output end of secondary winding test module is connected with the 4th connecting terminal.
10. discharge coil polarity test device as claimed in claim 8, which is characterized in that the box body is equipped with for inciting somebody to action
The box body is fixed on the fixing clamp on cross-arm, and the fixing clamp is connected through a screw thread with the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910676291.9A CN110261726A (en) | 2019-07-25 | 2019-07-25 | A kind of discharge coil polarity test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910676291.9A CN110261726A (en) | 2019-07-25 | 2019-07-25 | A kind of discharge coil polarity test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110261726A true CN110261726A (en) | 2019-09-20 |
Family
ID=67928222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910676291.9A Pending CN110261726A (en) | 2019-07-25 | 2019-07-25 | A kind of discharge coil polarity test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110261726A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638484A (en) * | 2020-06-11 | 2020-09-08 | 格力电器（郑州）有限公司 | Coil material detection device and detection method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201966539U (en) * | 2011-02-28 | 2011-09-07 | 衡水供电公司 | Overhead ground wire mounting lifter of power transmission line |
| CN103033721A (en) * | 2013-01-04 | 2013-04-10 | 吴建堂 | Dotted terminal identifier of high and low frequency transformer winding |
| CN204314416U (en) * | 2015-01-14 | 2015-05-06 | 国网冀北电力有限公司唐山供电公司 | A kind of simple and easy mutual inductor polarity DC test instrument |
| CN104865494A (en) * | 2015-05-06 | 2015-08-26 | 国家电网公司 | Portable current transformer polarity testing device and use method thereof |
| CN105403806A (en) * | 2015-12-26 | 2016-03-16 | 国网浙江武义县供电公司 | Combined type CT polarity detector having remote control function |
| CN106771836A (en) * | 2016-12-05 | 2017-05-31 | 中国计量大学 | Mutual inductor polarity detection means |
| CN107167758A (en) * | 2017-07-11 | 2017-09-15 | 国网辽宁省电力有限公司沈阳供电公司 | Mutual inductor ratio, polarity tester with waveform display function |
| CN108181545A (en) * | 2017-12-29 | 2018-06-19 | 国家电网公司 | A kind of polarity test circuit for current transformer |
-
2019
- 2019-07-25 CN CN201910676291.9A patent/CN110261726A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201966539U (en) * | 2011-02-28 | 2011-09-07 | 衡水供电公司 | Overhead ground wire mounting lifter of power transmission line |
| CN103033721A (en) * | 2013-01-04 | 2013-04-10 | 吴建堂 | Dotted terminal identifier of high and low frequency transformer winding |
| CN204314416U (en) * | 2015-01-14 | 2015-05-06 | 国网冀北电力有限公司唐山供电公司 | A kind of simple and easy mutual inductor polarity DC test instrument |
| CN104865494A (en) * | 2015-05-06 | 2015-08-26 | 国家电网公司 | Portable current transformer polarity testing device and use method thereof |
| CN105403806A (en) * | 2015-12-26 | 2016-03-16 | 国网浙江武义县供电公司 | Combined type CT polarity detector having remote control function |
| CN106771836A (en) * | 2016-12-05 | 2017-05-31 | 中国计量大学 | Mutual inductor polarity detection means |
| CN107167758A (en) * | 2017-07-11 | 2017-09-15 | 国网辽宁省电力有限公司沈阳供电公司 | Mutual inductor ratio, polarity tester with waveform display function |
| CN108181545A (en) * | 2017-12-29 | 2018-06-19 | 国家电网公司 | A kind of polarity test circuit for current transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638484A (en) * | 2020-06-11 | 2020-09-08 | 格力电器（郑州）有限公司 | Coil material detection device and detection method |
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Application publication date: 20190920 |