CN105929300B - Differential circuit detects voltage, power supply delivery casing - Google Patents
Differential circuit detects voltage, power supply delivery casing Download PDFInfo
- Publication number
- CN105929300B CN105929300B CN201610236779.6A CN201610236779A CN105929300B CN 105929300 B CN105929300 B CN 105929300B CN 201610236779 A CN201610236779 A CN 201610236779A CN 105929300 B CN105929300 B CN 105929300B
- Authority
- CN
- China
- Prior art keywords
- phase
- voltage
- electric appliance
- appliance box
- spaced apart
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005611 electricity Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 21
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- 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
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Breakers (AREA)
Abstract
The present invention gives a kind of differential circuits to detect voltage, power supply delivery casing, including electric appliance box, it is single-phase to be spaced apart, three-phase and four-line switch, current amplifier, pressure regulator and voltage-phase change-over switch, pressure regulator and voltage-phase change-over switch are arranged on the upper top cover of electric appliance box, three-phase and four-line switch is fixed on the rear wall of electric appliance box, and it is adjacent with voltage-phase change-over switch, three described single-phase to be spaced apart the lower right that the rear wall of electric appliance box is arranged in, three current amplifiers are arranged at three single-phase tops being spaced apart, and single-phase it is spaced apart one-to-one correspondence with three, three groups of current output terminals are additionally provided on the upper top cover of electric appliance box, one group of output voltage terminals and one group of power input terminal.When being detected using the present invention to differential circuit, directly entire differential circuit can be detected in the case where not disassembling, enormously simplify the simplification process of return lead, improve work efficiency.
Description
Technical field
The present invention relates to a kind of electrical equipment auxiliary detection devices more particularly to a kind of differential circuit to detect voltage, power supply
Delivery casing.
Background technique
During the circuit connection of transforming plant main transformer differential protection, test, in order to verify the correctness in circuit, need pair
The wiring of differential protection cabinet and main transformer enter line side CT (current transformer) are detected, are tested, to ensure after putting into operation, protection
Circuit can detecte the voltage and current amount of correct value and angle, due to circuit complexity, cause detection work quite numerous
Trivial, existing common detection methods are to test after disassembling circuit each section, for protecting the correctness of cabinet to carry out
Test is usually used relay-protection tester and is tested, and it is primary that battery short circuit CT is usually used in measurement polar for CT
Side combines pointer multimeter or is tested with Testing Instrument for Volt-ampere Characteristic, is approximately considered after above-mentioned two testing procedure is completed
Circuit connection is correct.
However, using above-mentioned test method test confirmation it is errorless after, some equipment investments operation after, discovering device
There are still wiring error problems, cause the reason of the success of above-mentioned conventional method detection to be not necessarily very: conventional inspection
Survey method when detecting, can not apply simultaneously the test voltage of a voltage reference angle and at this to subject differential protection cabinet
CT primary side input in circuit, which can be determined, to be determined the high current of angle with the reference voltage (electric current is according to CT requirement of different sizes
Difference will not generally be less than 200A), it is forced in detection to disassemble in circuit and is divided into several parts and detects respectively, each section has detected
It is approximately considered that entire circuit connection is correct after, and can not judge the wiring error after entire circuit connection.
Summary of the invention
The purpose of the present invention is to provide a kind of differential circuits to detect voltage, power supply delivery casing, which can be not
Under conditions of disassembling entire circuit, can for differential protection cabinet provide one can carry out 120 ° conversion reference voltage it is same
When, the high current of one with reference voltage equal angular are provided for the circuit CT, thus not disassembling to differential protection loop
In the case where, disposably entire circuit is detected from protection cabinet side and inlet wire CT.
The technical scheme adopted by the invention to solve the technical problem is that: a kind of differential circuit detection voltage, power supply output
Case, including electric appliance box, characterized in that the delivery casing further include it is single-phase be spaced apart, three-phase and four-line switch, current amplifier, pressure regulator
With voltage-phase change-over switch, the pressure regulator and voltage-phase change-over switch are arranged on the upper top cover of the electric appliance box,
The three-phase and four-line switch is fixed on the rear wall of the electric appliance box, and adjacent with the voltage-phase change-over switch,
Three it is described it is single-phase be spaced apart the lower right that the inner sidewall of the electric appliance box is set, three current amplifiers are arranged at three
A single-phase top being spaced apart, and described single-phase it is spaced apart one-to-one correspondence with three；
Three groups of current output terminals, one group of output voltage terminals and one group are additionally provided on the upper top cover of the electric appliance box
Power input terminal, the power input terminal are connected by conducting wire with the power input port that the three-phase and four-line switchs,
Three fire wire output end mouths of three-phase and four-line switch by conducting wire respectively with three single-phase firewire input terminals being spaced apart
Mouthful be connected, three single-phase zero curve input ports being spaced apart connected by conducting wire after with three-phase and four-line switch zero
Line output terminal mouth is connected, each described single-phase fire wire output end mouth being spaced apart and zero line output port by conducting wire respectively with phase
The firewire input port of each corresponding current amplifier is connected with zero line output port, three current amplifiers
Fire wire output end mouth and zero line output port pass through conducting wire respectively and be connected with three groups of current output terminals, the three-phase and four-line is opened
The three fire wire output end mouths closed are turned by conducting wire connection also corresponding with the voltage-phase change-over switch, the voltage-phase
The output port for changing switch is connected by conducting wire with the pressure regulator, the output port of the pressure regulator by conducting wire with it is described
The Single port of output voltage terminals is connected, and the another port of the output voltage terminals is opened by conducting wire and the three-phase and four-line
The zero line output port of pass is connected.
Preferably, an overload protection of connecting on the pressure regulator and the connection line of the voltage-phase change-over switch is opened
It closes.
Further, it connects on the conducting wire of the firewire input port of each current amplifier one and overloads guarantor
Shield switch.
Further, a voltmeter is set between the output voltage terminals, and the voltmeter is fixed at institute
It states on the upper top cover of electric appliance box.
Preferably, the electric appliance box lower end be arranged an electric appliance box bracket, the electric appliance box bracket include a plate and
Four supporting legs on four corners of the plate are set, and are provided with connection cross bar between four supporting legs.
Further, leader is fixedly installed in the front of the electric appliance box bracket.
Further, a universal wheel is respectively provided with below supporting leg described in each.
Further, in the fixed setting of the rear of the bracket, there are two " L " types to link up with.
The beneficial effects of the present invention are:
1, the configuration of the present invention is simple, it is easy for operation, test when, can provide one for differential protection cabinet can
Reference voltage to carry out 120 ° of conversions provides the high current of one with reference voltage equal angular simultaneously for the circuit CT, thus
In the case where not disassembled to differential protection loop, disposably entire circuit is examined from protection cabinet side and inlet wire CT
It surveys, not only increases loop-around test correctness, while being also greatly reduced loop-around test work, effectively increase test job effect
Rate.
2, the voltmeter being mounted between voltage output electronics, can be to reference voltage real-time measurement, to ensure benchmark electricity
Pressure is in reasonable test scope.
3, the universal wheel below supporting leg is set so that the mobile present invention be can plus it is convenient, meanwhile, setting is after bracket
" L " hook of side, can temporarily hang up test lead, to alleviate the labor intensity of tester.
4, the overcurrent protection switch on each circuit is set, tester's person, equipment safety can be effectively ensured.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Part preferred embodiment for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is overall structure side view of the invention；
Fig. 3 is enlarged drawing at A in Fig. 2；
Fig. 4 is circuit diagram of the invention；
In figure: 1 electric appliance box, 11 electric appliance chamber doors, 2 current output terminals, 3 output voltage terminals, 4 power input terminals, 5 electricity
Stream amplifier, 6 it is single-phase be spaced apart, 7 electric appliance box brackets, 71 plates, 72 supporting legs, 73 handles, 74 universal wheels, 75 " L " types hook, 8 adjust
Depressor, 81 pressure regulator knobs, 9 voltage-phase change-over switches, 91 voltage-phase change-over switch knobs, 10 overcurrent protection switch, 101
Conducting wire, 102 three-phase and four-lines switch, 103 voltmeters.
Specific embodiment
Below in conjunction with specific embodiments and drawings, technical solution in the embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only a part of preferred embodiment of the invention, instead of all the embodiments.This
Field technical staff can do similar deformation without violating the connotation of the present invention, therefore the present invention is not by following public
The limitation of specific embodiment.
The present invention provides a kind of differential circuits to detect voltage, power supply delivery casing (as shown in Figure 1), including electric appliance box 1, list
Mutually it is spaced apart 6, three-phase and four-line switch 102, current amplifier 5, pressure regulator 8 and voltage-phase change-over switch 9, in this specific embodiment
In, single-phase 6, three-phase and four-line switch 102, current amplifier 5, pressure regulator 8 and the voltage-phase change-over switch 9 of being spaced apart is in the market
Existing product, according to Design of Test System, what can be chosen on the market is arrived.
The electric appliance box 1 is a square box, and the electric appliance chamber door 11 of institute's band is fixed on electric appliance box 1 in articulated manner thereon
Ontology on, the pressure regulator 8 and voltage-phase change-over switch 9 are arranged on the upper top cover of the electric appliance box 1, pressure regulator rotation
Button 81 and voltage-phase change-over switch knob 91 both pass through in the upper top cover plane disposed thereon of electric appliance box 1, pressure regulator knob 81
With voltage-phase change-over switch knob 91 outside convenient for during the test, the size and reference voltage of voltage are debugged at any time
Phase.The three-phase and four-line switch 102 is fixed on the rear wall of the electric appliance box 1 (as shown in Figure 2), and with the electricity
Press phase change-over switch 9 adjacent, three single-phase lower rights for being spaced apart the rear wall that 6 are arranged in the electric appliance box 1, three institutes
State current amplifier 5 be arranged at three it is described it is single-phase be spaced apart 6 top, and described single-phase be spaced apart 6 one-to-one correspondence with three.
Three groups of current output terminals, 2, one groups of 3 and of output voltage terminals are additionally provided on the upper top cover of the electric appliance box 1
One group of power input terminal 4, circuit diagram of the invention is as shown in figure 4, here, for convenient between expression electric elements
Line connecting relation, by the input terminal of electric elements each in the present invention and output end be referred to as firewire input terminal thereon,
Zero curve input terminal, fire wire output end and zero line output end, the power input terminal 4 pass through conducting wire 101 and the three-phase and four-line
The power input port (including firewire and zero curve input port thereon) of switch 102 is connected, the three-phase and four-line switch 102
Three fire wire output end mouths be connected respectively with three single-phase 6 firewire input ports of being spaced apart by conducting wire 101, three
The single-phase zero line output being spaced apart after 6 zero curve input port is connected by conducting wire 101 with the three-phase and four-line switch 102
Port is connected, each described single-phase fire wire output end mouth for being spaced apart 6 and zero line output port by conducting wire 101 respectively and relatively
The firewire input port of each answered current amplifier 5 is connected with zero line output port, three current amplifiers 5
Fire wire output end mouth and zero line output port pass through conducting wire 101 respectively and be connected with three groups of current output terminals 2, the three-phase four
Three fire wire output end mouths of wiretap 102 pass through the connection also corresponding with the voltage-phase change-over switch 9 of conducting wire 101, institute
The output port for stating voltage-phase change-over switch 9 is connected by conducting wire 101 with the pressure regulator 8, the output of the pressure regulator 8
Port is connected by conducting wire 101 with the Single port of the output voltage terminals 3, the another port of the output voltage terminals 3
It is connected by conducting wire 101 with the zero line output port of the three-phase and four-line switch 102.
During the test, in order to protect each electric elements and tester's personal safety, here, in the pressure regulator 8
With an overcurrent protection switch 10 of connecting in the connection line of the voltage-phase change-over switch 9, in each Current amplifier
Overcurrent protection switch 10 of connecting on the conducting wire of the firewire input port of device 5 is overloaded and is protected when voltage or current is excessive
Shield switch 10 will be opened, and disconnect circuit, to ensure safety.
During the test, for convenient for further determining that the reference voltage value exported between output voltage terminals 4, here,
One voltmeter 103 is set between the output voltage terminals 4, and the voltmeter 103 is fixed at the electric appliance box 1
On upper top cover.
For the carrying and placement convenient for electric appliance box 1, one electric appliance box bracket 7, the electricity are set in the lower end of the electric appliance box 1
Four supporting legs 72 that device box bracket 7 plate 71 and be arranged on four corners of the plate including one, and in four supporting legs
Connection cross bar is provided between 72, connection cross bar is used to reinforce the intensity of electric appliance box bracket 7, and when in use, electric appliance box 1 is fixed
On plate 71.For electric appliance box bracket 7 easy to remove, leader 73 is fixedly installed in the front of the electric appliance box bracket 7, into one
Step, lower section of supporting leg 72 described in each is respectively provided with a universal wheel 74, test when, it is sometimes desirable to test lead very
Long, for convenience of the carrying of test lead, at the rear of the electric appliance box bracket 7, there are two " L " type hook 75, tests for fixed setting
Conducting wire can be hung up on " L " type hook 75.
Now operation instruction of the invention is carried out with the 110kV transformer differential protection circuit detections of volume three:
Power input terminal is accessed live three-phase and four-line formula power supply by the first step.
Second step, by the corresponding current output terminal 2 of three strong current generators 5 respectively at the 110kV with main transformer
The side side CT, 35kV side CT, 10kV CT is linked in sequence according to P1, P2.
Third step takes test wire, by the system voltage terminal of differential protection cabinet and 4 phase of output voltage terminals of the invention
Even, voltage-phase change-over switch 9 is directed toward the direction AN.
4th step closes 102, three single-phase switch 6 of three-phase and four-line switch, and adjusts pressure regulator knob 81, by benchmark electricity
Pressure output is adjusted to 57V, and the output electric current of three side current feedback circuits 5 is adjusted to appropriate electric current according to CT size respectively, is being protected
Each side Current Voltage input is checked on screen, such as high and low pressure side voltage is 0 °, high voltage side current shows 0 °, medium voltage side low-pressure side
Electric current shows 180 °, and in addition to tested phase, other phase no currents show that then the circuit connection is correct.
In the present invention, "front", "rear" is for facilitating the relative position for describing positional relationship and using, therefore cannot make
Limiting of its scope is interpreted as absolute position.
Except for the technical features described in the specification, it all is technically known to those skilled in the art.
The above combination attached drawing is described above in detail the preferred embodiment of the present invention and embodiment, but the present invention is not
The above-described embodiment and examples are confined to, for those skilled in the art, are not departing from structure of the present invention
Under the premise of think of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of differential circuit detects voltage, power supply delivery casing, including electric appliance box, characterized in that the delivery casing further includes single-phase
It is spaced apart, three-phase and four-line switch, current amplifier, pressure regulator and voltage-phase change-over switch, the pressure regulator and voltage-phase turn
It changes switch to be arranged on the upper top cover of the electric appliance box, the three-phase and four-line switch is fixed at the rear side of the electric appliance box
On wall, and adjacent with the voltage-phase change-over switch, three single-phase inner sidewalls that the electric appliance box is set that are spaced apart
Lower right, three current amplifiers are arranged at three single-phase tops being spaced apart, and described single-phase are spaced apart with three
It corresponds；
Three groups of current output terminals, one group of output voltage terminals and one group of power supply are additionally provided on the upper top cover of the electric appliance box
Input terminal, the power input terminal is connected by conducting wire with the power input port that the three-phase and four-line switchs, described
Three-phase and four-line switch three fire wire output end mouths by conducting wire respectively with three single-phase firewire input port phases being spaced apart
Connection, three single-phase zero curve input ports being spaced apart are defeated with the zero curve of three-phase and four-line switch after being connected by conducting wire
Exit port is connected, each described single-phase fire wire output end mouth being spaced apart and zero line output port by conducting wire respectively with it is corresponding
The firewire input port of each current amplifier be connected with zero line output port, the fire of three current amplifiers
Line output terminal mouth and zero line output port pass through conducting wire respectively and are connected with three groups of current output terminals, the three-phase and four-line switch
Three fire wire output end mouths are opened by conducting wire connection also corresponding with the voltage-phase change-over switch, the voltage-phase conversion
The output port of pass is connected by conducting wire with the pressure regulator, and the output port of the pressure regulator passes through conducting wire and the voltage
The Single port of output terminal is connected, what the another port of the output voltage terminals was switched by conducting wire and the three-phase and four-line
Zero line output port is connected；
One electric appliance box bracket is set in the lower end of the electric appliance box, the electric appliance box bracket includes a plate and setting described flat
Four supporting legs on four corners of plate, and connection cross bar is provided between four supporting legs；
Leader is fixedly installed in the front of the electric appliance box bracket；It is universal that one is respectively provided with below supporting leg described in each
Wheel；At the rear of the bracket, there are two " L " types to link up with for fixed setting.
2. differential circuit according to claim 1 detects voltage, power supply delivery casing, characterized in that the pressure regulator with
It connects in the connection line of the voltage-phase change-over switch overcurrent protection switch.
3. differential circuit according to claim 2 detects voltage, power supply delivery casing, characterized in that in each electricity
It connects on the conducting wire of the firewire input port of stream amplifier an overcurrent protection switch.
4. differential circuit according to claim 3 detects voltage, power supply delivery casing, characterized in that in the voltage output
One voltmeter is set between terminal, and the voltmeter is fixed on the upper top cover of the electric appliance box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236779.6A CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236779.6A CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105929300A CN105929300A (en) | 2016-09-07 |
| CN105929300B true CN105929300B (en) | 2019-01-04 |
Family
ID=56839308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610236779.6A Expired - Fee Related CN105929300B (en) | 2016-04-15 | 2016-04-15 | Differential circuit detects voltage, power supply delivery casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105929300B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| CN2248345Y (en) * | 1994-12-17 | 1997-02-26 | 胜利油田物资经济贸易集团公司 | Portable electric-control self-holding test instrument |
| CN201247298Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Automatic recognizing instrument for relay protection differential vector |
| CN102096003A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Automatic analytical device for checking wiring of conventional transformer |
| CN105206148A (en) * | 2015-10-08 | 2015-12-30 | 国网浙江临安市供电公司 | Electrician training device |
-
2016
- 2016-04-15 CN CN201610236779.6A patent/CN105929300B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| CN2248345Y (en) * | 1994-12-17 | 1997-02-26 | 胜利油田物资经济贸易集团公司 | Portable electric-control self-holding test instrument |
| CN201247298Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Automatic recognizing instrument for relay protection differential vector |
| CN102096003A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Automatic analytical device for checking wiring of conventional transformer |
| CN105206148A (en) * | 2015-10-08 | 2015-12-30 | 国网浙江临安市供电公司 | Electrician training device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105929300A (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103399184B (en) | Conveniently can adjust the combined connection box of phase sequence | |
| WO2021213211A1 (en) | Cable insulation impedance detection method and device | |
| CN102830287B (en) | Circuit power frequency parameter measuring device capable of eliminating power frequency interference | |
| CA2784338A1 (en) | Wiring tester of multifunctional electric energy metering device | |
| CN111596133A (en) | GIS loop resistance testing device and method | |
| CN110118885A (en) | Electrical energy measurement test connecting box, target meter replacing options and electric energy metering device | |
| JP5355433B2 (en) | Ground fault relay test device and ground fault relay test method | |
| CN109283421B (en) | Low-voltage power-on detection test method and device for railway traction substation | |
| CN105717426A (en) | Insulation monitoring device and method capable of preventing buses from misoperation | |
| CN202886592U (en) | Virtual load device of single-phase electric energy meter | |
| CN105738677B (en) | A kind of power network capacitive earth current detection method | |
| CN107785883A (en) | A kind of more level active compensation devices of three-phase four-arm and control method | |
| CN104124680A (en) | Arc harmonic elimination, line selection and overvoltage protection device | |
| CN106680614A (en) | Comprehensive test instrument for performance of electric leakage protection plugs | |
| CN105929300B (en) | Differential circuit detects voltage, power supply delivery casing | |
| CN203385774U (en) | Combined conjunction box capable of enabling phase sequence to be adjusted conveniently | |
| CN103163409A (en) | Method and device used for correcting inverse current wiring of field electric instrument | |
| CN111650926A (en) | Comprehensive test system for control box on cable | |
| CN202748409U (en) | Line power frequency parameter measuring apparatus capable of eliminating power frequency interference | |
| CN203191498U (en) | Undercurrent grounding line selecting device | |
| CN206270399U (en) | A kind of voltage circuit test circuit | |
| CN201666928U (en) | Matched test table of three-stage residual current operated protective device | |
| CN104183379A (en) | Connecting device for maintenance of secondary side of electric power current transformer | |
| CN108548983A (en) | A kind of test method of capacitance current, apparatus and system | |
| CN209280789U (en) | A kind of device measuring capacitance current by arc suppression coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20200415 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |