CN112615349A - Low-voltage power distribution cabinet phase-loss protection device - Google Patents
Low-voltage power distribution cabinet phase-loss protection device Download PDFInfo
- Publication number
- CN112615349A CN112615349A CN202011421657.7A CN202011421657A CN112615349A CN 112615349 A CN112615349 A CN 112615349A CN 202011421657 A CN202011421657 A CN 202011421657A CN 112615349 A CN112615349 A CN 112615349A
- Authority
- CN
- China
- Prior art keywords
- phase
- signal
- voltage
- circuit
- current
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load
- H02H3/13—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load for multiphase applications, e.g. phase interruption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a phase-lack protection device of a low-voltage power distribution cabinet, which comprises a current measurement circuit, a voltage measurement circuit, a phase-lack control circuit and a data transmission module, wherein when the circuit has phase lack, three-phase power supply is unbalanced, a breaker QF trips, a main contact of the breaker is disconnected, a coil of a relay loses power at the moment, a normally closed relay contact switch ZJ1 is opened, a normally open relay contact switch ZJ2 is closed, and a signal generator is connected with a power supply because the normally open relay contact switch ZJ2 is closed, receives a current signal of the current circuit and a voltage signal in the voltage circuit for processing, transmits a phase-lack signal to phase-lack signal receiving equipment, reminds a worker of circuit failure, and restarts the circuit or the checking equipment in time. The invention has simple design, low application cost, convenient popularization and high applicability.
Description
Technical Field
The invention relates to a power device, in particular to a phase-loss protection device for a low-voltage power distribution cabinet.
Background
With the continuous development of economic society, the production safety of electric power has great influence on the production and life of people, and especially the three-phase electric power production of high-risk customers and mining and underground mining operations is more important. According to the existing three-phase power standard low-voltage power distribution cabinet, a three-phase under-voltage protection device is not additionally arranged on most of equipment in the cabinet, and only any two-phase 380V voltage on a power supply side can be sampled and connected into an action coil. The phase voltage which is not sampled and accessed can cause phase failure and undervoltage at any time due to factors such as power supply system failure or disasters such as mine, rain, strong wind and the like. When the three-phase motor runs in the condition of voltage shortage of any phase of a power supply system, three-phase electrical equipment can be damaged, and serious property loss and personal casualty accidents are caused. The phase-lack protection device is additionally arranged on the conventional power distribution cabinet, so that the three-phase electrical equipment in operation can be effectively and timely shut down when the power supply system runs in a phase-lack voltage state, and the damage of the three-phase electrical equipment is avoided, and the serious personal and property loss is caused.
Disclosure of Invention
The invention aims to provide a phase-lack protection device of a low-voltage power distribution cabinet, which is additionally provided with a three-phase voltage-lack protection device to ensure the safe operation of three-phase electrical equipment and is provided with a data transmission module, so that a worker can timely receive phase-lack information of the equipment, and the working efficiency is improved.
The invention is realized by the following technical scheme:
a phase-defect protection device of a low-voltage power distribution cabinet comprises a current measurement loop, a voltage measurement loop and a phase-defect control loop, wherein the current measurement loop comprises a loop consisting of a current transformer LH1 connected with U, an ammeter A1 and a zero line, a loop consisting of a current transformer LH2 connected with V, an ammeter A2 and a zero line, and a loop consisting of a current transformer LH3 connected with W, an ammeter A3 and a zero line;
the voltage measurement circuit comprises a circuit formed by connecting U, V, W three phases of fuses connected with each other with two terminals at one end of a control switch SAV respectively, and connecting the other end of the control switch SAV with a voltmeter, and also comprises a relay coil ZJ, wherein one end of the relay coil ZJ is connected with any phase line, and the other end of the relay coil ZJ is grounded;
the open-phase control circuit comprises a circuit breaker coil, a circuit breaker main contact and a relay normally closed contact switch ZJ1, wherein the circuit breaker main contact is connected with three phase lines in series respectively, one end of the circuit breaker coil is connected with a zero line, the other end of the circuit breaker coil is connected with one end of the relay normally closed contact switch ZJ1, and the other end of the relay normally closed contact switch ZJ1 is connected with any phase line of the three phase lines.
Further, low voltage electricity switch board lacks looks protection device still includes the data transmission module, the data transmission module includes signal generator, relay normally open contact switch ZJ2, it has power supply battery to connect between signal generator's the power port, relay normally open contact switch ZJ2 with power supply battery establishes ties, signal generator's signal receiving terminal is connected with the ammeter of each looks of current circuit and voltage circuit's voltmeter respectively, receives the signal in current measurement return circuit and voltage measurement return circuit, signal generator's signal transmission after will handling goes out.
Further, the relay is an alternating current relay.
Furthermore, the breaker coil and the breaker main contact form a breaker QF, and the breaker QF is a DW15-630 universal breaker.
In addition, the present invention provides a phase-lacking signal receiving apparatus, the apparatus including a display; a memory; one or more processors; and one or more modules stored in the memory and configured to be executed by the one or more processors, the one or more modules including a data receiving module to receive the current signal and the voltage signal, a first display module to prompt for phase loss information while receiving the current signal and the voltage signal, and a second display module to display the received current signal and voltage signal.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a phase-lack protection device of a low-voltage power distribution cabinet, which is characterized in that a three-phase voltage-lack protection device is additionally arranged on the distribution cabinet, and a common alternating-current relay is additionally arranged, so that a power supply system can effectively and timely shut down three-phase electrical equipment in operation when running in any phase voltage-lack state, and further, the serious personal and property loss caused by the damage of the three-phase electrical equipment is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of the circuit structure of the present invention;
fig. 2 is a schematic view of a display interface of a phase-lacking signal receiving device according to the present invention.
Reference numbers and corresponding part names:
LH1, LH2 and LH3 are current transformers, A1, A2 and A3 are ammeters, FU1, FU2 and Fu3 are fuses, SAV is a control switch, ZJ is a relay coil, QF is a breaker, ZJ1 is a normally closed contact switch, and ZJ2 is a normally open contact switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.
Detailed description of the preferred embodiments
As shown in fig. 1, a phase-defect protection device for a low-voltage power distribution cabinet comprises a current measurement circuit, a voltage measurement circuit and a phase-defect control circuit, wherein the current measurement circuit comprises a circuit consisting of a current transformer LH1 connected with U, an ammeter a1 and a zero line, a circuit consisting of a current transformer LH2 connected with V, an ammeter a2 and a zero line, and a circuit consisting of a current transformer LH3 connected with W, an ammeter A3 and a zero line;
the voltage measurement circuit comprises a circuit formed by connecting U, V, W three phases of fuses connected with each other with two terminals at one end of a control switch SAV respectively, and connecting the other end of the control switch SAV with a voltmeter, and also comprises a relay coil ZJ, wherein one end of the relay coil ZJ is connected with any phase line, and the other end of the relay coil ZJ is grounded;
the open-phase control circuit comprises a circuit breaker coil, a circuit breaker main contact and a relay normally closed contact switch ZJ1, wherein the circuit breaker main contact is connected with three phase lines in series respectively, one end of the circuit breaker coil is connected with a zero line, the other end of the circuit breaker coil is connected with one end of the relay normally closed contact switch ZJ1, and the other end of the relay normally closed contact switch ZJ1 is connected with any phase line of the three phase lines.
In addition, low voltage electricity switch board lacks looks protection device still includes the data transmission module, the data transmission module includes signal generator, relay normally open contact switch ZJ2, it has the power supply battery to connect between signal generator's the power port, relay normally open contact switch ZJ2 with the power supply battery is established ties, signal generator's signal receiving terminal is connected with the ampere meter of each looks of current circuit and voltage circuit respectively, receives the signal in current measurement return circuit and voltage measurement return circuit, signal generator's signal transmission after will handling goes out.
In order to meet the voltage of a circuit, the relay is an alternating current relay, a breaker QF is formed by a breaker coil and a breaker main contact, and the breaker QF is a DW15-630 universal breaker.
When the three-phase load circuit breaker is applied specifically, a breaker QF is switched on, a breaker main contact is closed, three-phase load equipment is electrified and conducted, the equipment works normally, a relay normally-closed switch ZJ1 connected with a breaker coil is closed at the moment, a current loop and a voltage loop run normally, a signal generator is powered by an external power supply, but the relay normally-open contact switch ZJ2 is opened at the moment, and the signal generator does not have a power supply and does not work; when the circuit appears lacking the looks, cause three-phase power supply unbalance, circuit breaker QF trip, circuit breaker QF main contact disconnection, relay coil ZJ loses the electricity this moment, relay normally closed contact switch ZJ1 is opened, relay normally open contact switch ZJ2 is closed, the great current of numerical value less secondary current is converted into to the current transformer in the current circuit in with the return circuit, the ampere meter is measured the electric current after the conversion, data transmission module is because relay normally open contact switch ZJ2 is closed this moment, signal generator switch-on, the voltage signal in the current signal and the voltage circuit who receives the current circuit handles, and go out signal transmission through wireless transmission function. When a short circuit occurs in a circuit, short-circuit current can trip the breaker QF through the breaker QF, the main contact of the breaker is disconnected, the power supply is directly cut off, the three-phase load equipment end stops working, and short-circuit protection of the equipment is realized. When the overload condition appears in the circuit, the current increases the heat element in messenger relay ZJ and produces the heat, the thermal relay normally closed contact switch ZJ1 disconnection of being connected with circuit breaker QF, open phase protection return circuit outage, the disconnection of circuit breaker main contact, three-phase load equipment loses the power stop work this moment, the realization is to equipment overload protection, data transmission module this moment is because relay normally open contact switch ZJ2 is closed, signal generator switch-on power, the current signal of receiving the current return circuit and the voltage signal in the voltage return circuit handle, and go out signal transmission through wireless transmission function.
In addition, as shown in fig. 2, the present invention provides a phase-lacking signal receiving apparatus including a display; a memory; one or more processors; and one or more modules stored in the memory and configured to be executed by the one or more processors, the one or more modules including a data receiving module to receive the current signal and the voltage signal, a first display module to prompt for phase loss information while receiving the current signal and the voltage signal, and a second display module to display the received current signal and voltage signal. When the circuit normally works, the signal generator does not have a power supply and does not send a signal, the open-phase receiving equipment does not have a receivable signal at the moment and is in a no-signal state, when the circuit is in an open-phase fault, the relay normally-open contact switch ZJ2 is closed, the signal generator works and transmits a current signal and a voltage signal to the open-phase signal receiving equipment, the open-phase signal receiving equipment processes the received current signal and the received voltage signal and converts the current signal and the received voltage signal into a current signal and a voltage signal of a visual image, the current signal and the voltage signal are finally displayed on the display, and after the displayed current signal and voltage signal states are stable, a text box for prompting the open-phase is displayed to remind a worker of circuit fault, and the worker can restart the circuit or check the equipment in time to ensure the safe operation of.
The invention can ensure that the running three-phase electrical equipment can be effectively and automatically shut down in time when the power supply system runs in any phase under voltage, thereby avoiding serious personal and property loss caused by damage of the three-phase electrical equipment.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The open-phase protection device of the low-voltage power distribution cabinet is characterized by comprising a current measurement loop, a voltage measurement loop and an open-phase control loop, wherein the current measurement loop comprises a loop consisting of a current transformer LH1 connected with U, an ammeter A1 and a zero line, a loop consisting of a current transformer LH2 connected with V, an ammeter A2 and a zero line, and a loop consisting of a current transformer LH3 connected with W, an ammeter A3 and a zero line;
the voltage measurement circuit comprises a circuit formed by connecting U, V, W three phases of fuses connected with each other with two terminals at one end of a control switch SAV respectively, and connecting the other end of the control switch SAV with a voltmeter, and also comprises a relay coil ZJ, wherein one end of the relay coil ZJ is connected with any phase line, and the other end of the relay coil ZJ is grounded;
the open-phase control circuit comprises a circuit breaker coil, a circuit breaker main contact and a relay normally closed contact switch ZJ1, wherein the circuit breaker main contact is connected with three phase lines in series respectively, one end of the circuit breaker coil is connected with a zero line, the other end of the circuit breaker coil is connected with one end of the relay normally closed contact switch ZJ1, and the other end of the relay normally closed contact switch ZJ1 is connected with any phase line of the three phase lines.
2. The open-phase protection device of a low-voltage power distribution cabinet according to claim 1, further comprising a data transmission module, wherein the data transmission module comprises a signal generator and a relay normally-open contact switch ZJ2, a power supply battery is connected between power ports of the signal generator, the relay normally-open contact switch ZJ2 is connected in series with the power supply battery, a signal receiving end of the signal generator is respectively connected with a current meter and a voltage meter of a voltage loop of each phase of the current loop, and receives signals of the current measurement loop and the voltage measurement loop, and a signal sending end of the signal generator transmits processed signals.
3. The apparatus according to claim 1, wherein said relay is an ac relay.
4. The apparatus of claim 1, wherein the circuit breaker QF is a DW15-630 universal circuit breaker.
5. A phase-loss signal receiving apparatus, characterized in that the apparatus comprises a display; a memory; one or more processors; and one or more modules stored in the memory and configured to be executed by the one or more processors, the one or more modules including a data receiving module to receive the current signal and the voltage signal, a first display module to prompt for phase loss information while receiving the current signal and the voltage signal, and a second display module to display the received current signal and voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011421657.7A CN112615349A (en) | 2020-12-08 | 2020-12-08 | Low-voltage power distribution cabinet phase-loss protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011421657.7A CN112615349A (en) | 2020-12-08 | 2020-12-08 | Low-voltage power distribution cabinet phase-loss protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112615349A true CN112615349A (en) | 2021-04-06 |
Family
ID=75229572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011421657.7A Pending CN112615349A (en) | 2020-12-08 | 2020-12-08 | Low-voltage power distribution cabinet phase-loss protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112615349A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203387153U (en) * | 2013-08-16 | 2014-01-08 | 湛江开关有限公司 | Automatic power-off protection device for phase loss and zero-line deficiency |
| CN203734275U (en) * | 2014-02-13 | 2014-07-23 | 河北建工集团装饰工程公司 | Remote control electric power switch |
| CN106645860A (en) * | 2017-01-11 | 2017-05-10 | 国家电网公司 | Transformer station grounding device characteristic parameter detection verification system |
| CN107394747A (en) * | 2017-08-30 | 2017-11-24 | 广西电网有限责任公司贵港供电局 | Box type transformer auto recloser |
| CN206759031U (en) * | 2017-07-03 | 2017-12-15 | 深圳市广前电力有限公司 | A kind of improved power plant's low-voltage power supply system ground protection warning device |
| CN206775238U (en) * | 2017-06-09 | 2017-12-19 | 国网山东省电力公司五莲县供电公司 | Low tension switch tripping operation, excess temperature active alarm device |
| CN207938553U (en) * | 2017-12-14 | 2018-10-02 | 国网宁夏电力有限公司吴忠供电公司 | DW15 type universal circuit breaker automatic switching-on devices |
| CN209216904U (en) * | 2019-01-24 | 2019-08-06 | 深圳市粤通达电气科技集团有限公司 | DW15 Series Air Circuit Breaker automatic closing control circuit |
-
2020
- 2020-12-08 CN CN202011421657.7A patent/CN112615349A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203387153U (en) * | 2013-08-16 | 2014-01-08 | 湛江开关有限公司 | Automatic power-off protection device for phase loss and zero-line deficiency |
| CN203734275U (en) * | 2014-02-13 | 2014-07-23 | 河北建工集团装饰工程公司 | Remote control electric power switch |
| CN106645860A (en) * | 2017-01-11 | 2017-05-10 | 国家电网公司 | Transformer station grounding device characteristic parameter detection verification system |
| CN206775238U (en) * | 2017-06-09 | 2017-12-19 | 国网山东省电力公司五莲县供电公司 | Low tension switch tripping operation, excess temperature active alarm device |
| CN206759031U (en) * | 2017-07-03 | 2017-12-15 | 深圳市广前电力有限公司 | A kind of improved power plant's low-voltage power supply system ground protection warning device |
| CN107394747A (en) * | 2017-08-30 | 2017-11-24 | 广西电网有限责任公司贵港供电局 | Box type transformer auto recloser |
| CN207938553U (en) * | 2017-12-14 | 2018-10-02 | 国网宁夏电力有限公司吴忠供电公司 | DW15 type universal circuit breaker automatic switching-on devices |
| CN209216904U (en) * | 2019-01-24 | 2019-08-06 | 深圳市粤通达电气科技集团有限公司 | DW15 Series Air Circuit Breaker automatic closing control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103004047A (en) | Systems and methods for providing arc fault and/or ground fault protection for distributed generation sources | |
| CN103777077A (en) | Wireless pincerlike phase detection device | |
| CN106856332A (en) | A kind of distributed photovoltaic power generation grid-connected system | |
| CN101614795A (en) | A kind of default-phase signal detection circuit for three-phase power | |
| CN2867561Y (en) | Mine flame-proof vacuum feed switch | |
| CN102749553A (en) | Automatic positioning device for grounding failure of power transmission line | |
| CN112615349A (en) | Low-voltage power distribution cabinet phase-loss protection device | |
| CN202041612U (en) | Automatic locating device for earth faults of electricity transmission lines | |
| CN207638333U (en) | Alternating current filter cuts off circuit automatically after a kind of last line tripping | |
| CN202221434U (en) | Measurement auxiliary operating platform with insulation megger | |
| CN201386894Y (en) | Startup circuit for emergency DC oil pump in lubricant station | |
| CN203772958U (en) | Wireless clamp-shaped phase detection device | |
| CN204992527U (en) | Circuit breaker and system that opens circuit with disconnected zero -sum open -phase protection | |
| CN103018631A (en) | System for 10kV fault line detection | |
| CN209389768U (en) | Simple type emergency power supply Quick access device | |
| CN201805212U (en) | Incoming line open-phase protection device of traction substation | |
| CN106257782B (en) | Ac leakage drives protector | |
| CN202929158U (en) | 10KV grounding line selection system | |
| CN110426595A (en) | One secondary circuit failure detection device of ring-main unit | |
| CN213521411U (en) | Intelligent removing system for faults of electrified railway contact network section | |
| CN218678408U (en) | Protection device for low-current grounding line selection of alternating current power supply and distribution system | |
| CN214590762U (en) | Power supply control device for vehicle-mounted water purifying equipment | |
| CN218449605U (en) | Small-size direct current portable power source of transformer substation | |
| CN109358294A (en) | Cell batteries open circuit online monitoring system | |
| CN213903767U (en) | Direct current fuse breaks away from generating line comprehensive monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |
|
| RJ01 | Rejection of invention patent application after publication |