CN111812495A - Electric quantity monitoring accessory for direct current molded case circuit breaker - Google Patents
Electric quantity monitoring accessory for direct current molded case circuit breaker Download PDFInfo
- Publication number
- CN111812495A CN111812495A CN202010578906.7A CN202010578906A CN111812495A CN 111812495 A CN111812495 A CN 111812495A CN 202010578906 A CN202010578906 A CN 202010578906A CN 111812495 A CN111812495 A CN 111812495A
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- circuit breaker
- pcb
- direct 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
- 238000012544 monitoring process Methods 0.000 title claims abstract description 52
- 238000004891 communication Methods 0.000 claims description 14
- 230000003750 conditioning effect Effects 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 230000006870 function Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
Abstract
The invention relates to an electric quantity monitoring accessory for a direct current plastic shell circuit breaker, and belongs to the technical field of ship low-voltage direct current power. Comprises a housing base, an embedded fixing piece, a PCB A, PCB circuit board B and a housing cover; the outer shell base is connected with the outer shell cover, and an embedded fixing piece, a PCB (printed circuit board) A and a PCB B are arranged on the outer shell base between the outer shell base and the outer shell cover; the PCB circuit board A is connected with the PCB circuit board B. The electric quantity monitoring accessory is embedded in the base of the direct-current molded case circuit breaker, and the functions of collecting and uploading electric parameters such as line voltage, current, power, the on-off state of the circuit breaker and the like are realized in a ship environment; the accessory adopts the disconnect-type design, and convenience of customers maintains and changes the electric quantity accessory. On overall dimension, reduced the volume of the inside electrical parameter monitoring unit of panel and the quantity of module, retrencied internal connection line scheduling problem, be favorable to the miniaturization of panel.
Description
Technical Field
The invention relates to a power consumption monitoring accessory of a direct current molded case circuit breaker, and belongs to the technical field of ship low-voltage direct current power.
Background
Along with the continuous improvement of the intelligent manufacturing level in the field of ships, new requirements are provided for the functions of the molded case circuit breaker, the functions of detecting the voltage, the current and other electrical parameters of the circuit where the circuit breaker is located are required besides the traditional protection of overload, inrush current and the like, the monitoring of the opening and closing states of the circuit breaker is realized, all monitoring quantities are uploaded to an upper computer to realize communication monitoring, and a user can conveniently inspect the state of the circuit. The traditional electrical parameter monitoring technology for the direct current power distribution system mainly adopts a programmable logic controller (PLC for short) and utilizes conventional various sensors, data acquisition units and other modes to complete corresponding functions. Because traditional sensor and acquisition unit's volume is great, can't imbed inside the circuit breaker but install inside the block terminal, occupied more block terminal space, increase distribution equipment's volume. The other technical scheme is that the measurement of the electrical parameters is realized by directly adopting an electronic release of the circuit breaker. However, the main function of the electronic trip unit is to achieve protection of the circuit breaker, and it is generally not recommended to integrate the measurement unit with the protection unit based on safety considerations. Meanwhile, the direct current molded case circuit breaker widely used at present is small in size and is not provided with an electronic release generally, so that the purpose of monitoring electrical parameters cannot be achieved by utilizing the electronic release. Therefore, there is a need in the art for a dedicated electrical quantity monitoring accessory for a marine dc molded case circuit breaker, which implements the electrical quantity monitoring function for the voltage, current, etc. of the line in which it is located.
Disclosure of Invention
The invention aims to solve the technical problems of accurately, conveniently and effectively monitoring the voltage, the current and the power of a line in which a molded case circuit breaker is positioned in a direct current distribution system on a ship and the breaker states of opening and closing of the circuit breaker and the like, transmitting related monitoring quantities to a host computer in a centralized control room, reducing the volume and the space of the circuit breaker and a distribution board as much as possible and simplifying the installation and the disassembly of a functional unit.
In order to achieve the purpose of solving the problems, the technical scheme adopted by the invention is to provide a power consumption monitoring accessory of a direct current molded case circuit breaker, which comprises a shell base, an embedded fixing piece, a Printed Circuit Board (PCB) A, a PCB B and a shell cover, wherein the shell base is provided with a plurality of embedded fixing pieces; the outer shell base is connected with the outer shell cover, and the embedded fixing piece, the PCB circuit board A and the PCB circuit board B are arranged on the outer shell base between the outer shell base and the outer shell cover; the PCB circuit board A is connected with the PCB circuit board B.
Preferably, the PCB circuit board A comprises a microcontroller, a voltage signal input circuit, a current signal input circuit, a switch state acquisition circuit, a 24V/5V power circuit, a charged erasable programmable read-only memory EEPROM circuit, a communication module and a peripheral reset circuit; the voltage signal input circuit, the current signal input circuit, the switch state acquisition circuit, the 24V/5V power circuit, the EEPROM circuit and the peripheral reset circuit are respectively connected with the microcontroller; the microcontroller is connected with the upper computer through the communication module.
Preferably, the PCB circuit board B includes a voltage acquisition module and a current acquisition module; the voltage acquisition module and the current acquisition module are connected with the microcontroller.
Preferably, the voltage acquisition module comprises a 350-640V busbar direct-current voltage circuit, a divider resistor and a voltage signal conditioning circuit; the 350V-640V busbar direct current voltage circuit is connected with a divider resistor, and the divider resistor is connected with the microcontroller through a voltage signal conditioning circuit.
Preferably, the current acquisition module comprises a current sensor, a signal isolator and a current signal conditioning circuit; the current sensor is connected with the signal isolator, and the signal isolator is connected with the microcontroller through the current signal conditioning circuit.
Preferably, the current sensor is set as a hall current sensor or a shunt; and an input signal of the current acquisition module is set as a standard mV signal.
A direct current molded case circuit breaker applying the electricity consumption monitoring accessory of the direct current molded case circuit breaker is characterized in that a direct current molded case circuit breaker base is connected with a circuit breaker body; the direct current moulded case circuit breaker base is inside to be equipped with embedded electric quantity monitoring annex, be equipped with the apron between electric quantity monitoring annex and the circuit breaker body.
According to the electric quantity monitoring accessory for the direct-current molded case circuit breaker, disclosed by the invention, the electric quantity monitoring accessory is embedded in the direct-current molded case circuit breaker mounting table, and the functions of collecting and uploading electric parameters such as line voltage, current, power, the on-off state of the circuit breaker and the like can be realized in a ship environment. Meanwhile, in order to facilitate the maintenance and replacement of the electric quantity accessory for a user, the accessory adopts a separated design, and the detachment and replacement of accessory equipment are facilitated. On overall dimension, reduced the volume of the inside electrical parameter monitoring unit of panel and the quantity of module, retrencied internal connection line scheduling problem, be favorable to the miniaturization of panel.
Compared with the prior art, the invention has the following beneficial effects:
1. the direct-current molded case circuit breaker has an electric quantity monitoring function, and the voltage, current and power on-off state monitoring of the circuit breaker is realized;
2. the direct-current molded case circuit breaker is miniaturized, and the overall external dimension of the circuit breaker is not increased by embedding the electric quantity monitoring accessory in the circuit breaker mounting table with limited space;
3. make electric quantity monitoring annex modularization, embedded installation makes things convenient for electric quantity monitoring annex installation and dismantlement in the circuit breaker base.
Drawings
FIG. 1 is a schematic structural diagram of a DC power monitoring accessory according to the present invention;
wherein, a is a side view; b is a top view; c is a sectional view taken along line A-A of the drawing b;
FIG. 2 is a three-dimensional design diagram of the DC power monitoring accessory of the present invention;
FIG. 3 is an electrical schematic diagram of the DC power monitoring accessory circuit board A of the present invention;
FIG. 4 is an electrical schematic diagram of the DC power monitoring accessory circuit board B of the present invention;
FIG. 5 is a schematic view of the installation of the DC circuit breaker base and the power monitoring accessory of the present invention;
FIG. 6 is a schematic view of the installation of the DC circuit breaker body and the base of the present invention;
reference numerals: 1. a housing base; 2. embedding a fixing piece; 3. a long rod screw; 4, PCB circuit board A; 5, PCB circuit board B; 6. a housing cover; 7. a DC breaker base; 8. an electric quantity monitoring accessory; 9. a flow divider; 10. a circuit breaker body; 11. and (7) a cover plate.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1 to 6, the present invention provides a power consumption monitoring accessory for a dc molded case circuit breaker, which includes a case base 1, an embedded type fixing member 2, a PCB circuit board a4, a PCB circuit board B5, and a case cover 6; the outer shell base 1 is connected with the outer shell cover 6, and the embedded fixing piece 2, the PCB A4 and the PCB B5 are arranged on the outer shell base 1 between the outer shell base 1 and the outer shell cover 6; PCB A4 and PCB B5 are connected. The PCB A4 comprises a microcontroller, a voltage signal input circuit, a current signal input circuit, a switch state acquisition circuit, a 24V/5V power circuit, an EEPROM circuit, a communication module and a peripheral reset circuit; the voltage signal input circuit, the current signal input circuit, the switch state acquisition circuit, the 24V/5V power supply circuit, the EEPROM circuit and the peripheral reset circuit are respectively connected with the microcontroller; the microcontroller is connected with the upper computer through the communication module. The PCB circuit board B5 comprises a voltage acquisition module and a current acquisition module; the voltage acquisition module and the current acquisition module are connected with the microcontroller. The voltage acquisition module comprises a 350-640V busbar direct-current voltage circuit, a divider resistor and a voltage signal conditioning circuit; the 350V-640V busbar direct current voltage circuit is connected with a divider resistor, and the divider resistor is connected with the microcontroller through a voltage signal conditioning circuit. The current acquisition module comprises a current sensor, a signal isolator and a current signal conditioning circuit; the current sensor is connected with the signal isolator, and the signal isolator is connected with the microcontroller through the current signal conditioning circuit. The current sensor is a Hall current sensor or a current divider 9; and an input signal of the current acquisition module is set as a standard mV signal. The direct current molded case circuit breaker base 7 is connected with the circuit breaker body 10; the direct current moulded case circuit breaker base 7 is inside to be equipped with embedded electric quantity monitoring annex 8, is equipped with apron 11 between electric quantity monitoring annex 8 and the circuit breaker body 10.
As shown in fig. 1 to 6, the electricity quantity monitoring accessory 8 is composed of a housing base 1, an embedded fixing member 2, a long rod screw 3, a circuit board (PCB circuit board a4, PCB circuit board B5), a housing cover 6 and the like. As shown in figure 1. The dimensions of the attachment can be made very small, in one implementation, reduced to 40mm by 73mm by 30.5mm, with a three-dimensional model of the configuration shown in fig. 2.
The direct current electric quantity accessory circuit board comprises two circuit boards: PCB panel a4 and PCB panel B5. The electrical schematic block diagram of PCB panel a4 is shown in fig. 3. The device mainly comprises a microcontroller, a voltage and current signal input circuit, a switch state acquisition circuit, a 24V/5V power supply circuit, a charged erasable programmable read-only memory EEPROM circuit, a communication circuit, a peripheral reset circuit and the like. The 24V/5V power supply circuit converts 24V direct current voltage into 5V direct current which can supply power for modules such as a microcontroller, a communication circuit and the like, and normal power supply for each module is ensured. The microcontroller receives the direct current voltage signal and the direct current signal, converts the direct current voltage signal and the direct current signal into digital quantity through analog-to-digital conversion and operation, and uploads related monitoring data to an upper computer through a program control communication circuit. Meanwhile, the electric quantity monitoring accessory is provided with an EEPROM module, and related setting parameters can be configured on line and stored in the EEPROM module. The communication circuit CAN adopt CAN communication, 485 communication, RS232 communication, DeviceNet, Ethernet and other modes.
The electrical schematic of PCB panel B5 is shown in fig. 4. The device comprises a voltage acquisition module and a current acquisition module. The voltage acquisition module is responsible for acquiring external 350-640V busbar direct-current voltage and transmitting a voltage acquisition signal to the microcontroller through the signal conditioning circuit. The current collection module is responsible for collecting millivolt signals on a current sensor (a Hall current sensor or a current divider 9) to be supplied to the microcontroller to calculate the line current.
The input signal provided by the current acquisition module is a standard mV signal, and the signal input of the shunt of 0-100mV can be accepted. The sensor signals may include direct current hall current sensor signals and their converted signals, shunt signals, and the like.
The current of the main circuit of the circuit breaker passes through a Hall current sensor or a current divider 9 and then is converted into a mV signal to enter a circuit board, and the magnitude of the current is calculated through conditioning and operation. For the requirements of different rated currents, different specification current parameters are adopted for matching, and different current specification measurement requirements can be met. For example, a circuit breaker rated for 100A current corresponds to a 100A/50mV sensor transformation ratio, and a circuit breaker rated for 200A current corresponds to a 200A/50mV sensor transformation ratio.
The direct current electric quantity monitoring accessory 8 and the direct current breaker body 10 are embedded. The dc power accessory 8 is mounted on the dc breaker base 7, and the mounting schematic is shown in fig. 5. This is done to do without increasing the overall circuit breaker physical size or switchboard level extra size.
The electric quantity monitoring accessory 8 is installed and fixed between the direct current breaker base 7 and the direct current breaker body 10, and the installation is as shown in a schematic diagram 6. When the direct current breaker is installed, the electric quantity monitoring accessory 8 is placed on an installation position of the direct current breaker base 7, after the direct current breaker base 7 is fixed through screws, the cover plate 11 is covered and then fixed, and finally the breaker body 10 is fixed on the breaker base 7; when the circuit breaker is disassembled, the circuit breaker body 10 is separated from the circuit breaker base 7, and after the cover plate 11 is disassembled, the electric quantity monitoring accessory 8 can be removed after the screws are loosened.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a direct current moulded case circuit breaker power consumption monitoring annex which characterized in that: comprises a housing base, an embedded fixing piece, a PCB A, PCB circuit board B and a housing cover; the outer shell base is connected with the outer shell cover, and the embedded fixing piece, the PCB circuit board A and the PCB circuit board B are arranged on the outer shell base between the outer shell base and the outer shell cover; the PCB circuit board A is connected with the PCB circuit board B.
2. The electric quantity monitoring accessory for the direct current molded case circuit breaker as claimed in claim 1, wherein: the PCB circuit board A comprises a microcontroller, a voltage signal input circuit, a current signal input circuit, a switch state acquisition circuit, a 24V/5V power circuit, an EEPROM circuit, a communication module and a peripheral reset circuit; the voltage signal input circuit, the current signal input circuit, the switch state acquisition circuit, the 24V/5V power circuit, the EEPROM circuit and the peripheral reset circuit are respectively connected with the microcontroller; the microcontroller is connected with the upper computer through the communication module.
3. The electricity consumption monitoring accessory for the direct current molded case circuit breaker as claimed in claim 2, wherein: the PCB circuit board B comprises a voltage acquisition module and a current acquisition module; the voltage acquisition module and the current acquisition module are connected with the microcontroller.
4. The electric quantity monitoring accessory for the direct current molded case circuit breaker as claimed in claim 3, wherein: the voltage acquisition module comprises a 350-640V busbar direct-current voltage circuit, a divider resistor and a voltage signal conditioning circuit; the 350V-640V busbar direct current voltage circuit is connected with a divider resistor, and the divider resistor is connected with the microcontroller through a voltage signal conditioning circuit.
5. The electric quantity monitoring accessory for the direct current molded case circuit breaker as claimed in claim 4, wherein: the current acquisition module comprises a current sensor, a signal isolator and a current signal conditioning circuit; the current sensor is connected with the signal isolator, and the signal isolator is connected with the microcontroller through the current signal conditioning circuit.
6. The electric quantity monitoring accessory for the direct current molded case circuit breaker as claimed in claim 4, wherein: the current sensor is a Hall current sensor or a current divider; and an input signal of the current acquisition module is set as a standard mV signal.
7. A dc molded case circuit breaker to which the electricity consumption monitoring accessory for a dc molded case circuit breaker according to any one of claims 1 to 6 is applied, characterized in that: the direct current molded case circuit breaker base is connected with the circuit breaker body; the direct current moulded case circuit breaker base is inside to be equipped with embedded electric quantity monitoring annex, be equipped with the apron between electric quantity monitoring annex and the circuit breaker body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010578906.7A CN111812495A (en) | 2020-06-23 | 2020-06-23 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010578906.7A CN111812495A (en) | 2020-06-23 | 2020-06-23 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111812495A true CN111812495A (en) | 2020-10-23 |
Family
ID=72845571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010578906.7A Pending CN111812495A (en) | 2020-06-23 | 2020-06-23 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111812495A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006059384A1 (en) * | 2006-12-15 | 2008-06-26 | Siemens Ag | Electrical device for measuring current flowing through conductor, comprises housing with input and output electrical connections for connecting respective ends of conductor and current transformer, which is provided for measuring current |
| CN102693882A (en) * | 2011-03-22 | 2012-09-26 | 上海市电力公司 | A universal circuit breaker with a hot-pluggable controller |
| CN104135071A (en) * | 2014-07-16 | 2014-11-05 | 南京捷泰电力设备有限公司 | Multi-functional low-voltage intelligent switch |
| CN204903675U (en) * | 2015-08-05 | 2015-12-23 | 南京捷泰电力设备有限公司 | Low -voltage moulded case circuit breaker with electric energy quality monitoring function |
| CN206250743U (en) * | 2016-12-23 | 2017-06-13 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker of plastic casing |
| CN208401624U (en) * | 2018-03-22 | 2019-01-18 | 中通服节能技术服务有限公司 | A kind of intelligent DC distribution monitoring system |
| CN109859994A (en) * | 2018-12-04 | 2019-06-07 | 上海电器科学研究所（集团）有限公司 | A kind of electric quantity monitoring attachment and its application method exchanging breaker of plastic casing |
| CN110297176A (en) * | 2019-07-25 | 2019-10-01 | 安徽美通电力科技有限公司 | A kind of data transmission control system of breaker |
| CN110729730A (en) * | 2019-11-19 | 2020-01-24 | 中国舰船研究设计中心 | Built-in isolated voltage-taking protection device and power-taking method |
-
2020
- 2020-06-23 CN CN202010578906.7A patent/CN111812495A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006059384A1 (en) * | 2006-12-15 | 2008-06-26 | Siemens Ag | Electrical device for measuring current flowing through conductor, comprises housing with input and output electrical connections for connecting respective ends of conductor and current transformer, which is provided for measuring current |
| CN102693882A (en) * | 2011-03-22 | 2012-09-26 | 上海市电力公司 | A universal circuit breaker with a hot-pluggable controller |
| CN104135071A (en) * | 2014-07-16 | 2014-11-05 | 南京捷泰电力设备有限公司 | Multi-functional low-voltage intelligent switch |
| CN204903675U (en) * | 2015-08-05 | 2015-12-23 | 南京捷泰电力设备有限公司 | Low -voltage moulded case circuit breaker with electric energy quality monitoring function |
| CN206250743U (en) * | 2016-12-23 | 2017-06-13 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker of plastic casing |
| CN208401624U (en) * | 2018-03-22 | 2019-01-18 | 中通服节能技术服务有限公司 | A kind of intelligent DC distribution monitoring system |
| CN109859994A (en) * | 2018-12-04 | 2019-06-07 | 上海电器科学研究所（集团）有限公司 | A kind of electric quantity monitoring attachment and its application method exchanging breaker of plastic casing |
| CN110297176A (en) * | 2019-07-25 | 2019-10-01 | 安徽美通电力科技有限公司 | A kind of data transmission control system of breaker |
| CN110729730A (en) * | 2019-11-19 | 2020-01-24 | 中国舰船研究设计中心 | Built-in isolated voltage-taking protection device and power-taking method |
Non-Patent Citations (1)
| Title |
|---|
| 杨小强等: "虚拟仪器系统集成与工程应用", 北京：冶金工业出版社, pages: 154 - 155 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111812495A (en) | Electric quantity monitoring accessory for direct current molded case circuit breaker | |
| CN206890663U (en) | A kind of switching mode room thermostat with dual control function | |
| CN108562791A (en) | A kind of data acquisition device | |
| CN202737589U (en) | Low-voltage intelligent comprehensive distribution box | |
| CN208922087U (en) | Intelligent temperature, pressure controller | |
| WO2011077104A1 (en) | Electricity supply and control apparatus | |
| CN216354000U (en) | Intelligent molded case circuit breaker with metering and communication functions | |
| CN203645406U (en) | Intelligent distribution monitoring cabinet | |
| CN112053917A (en) | Thing allies oneself with surplus current operated circuit breaker | |
| CN210803625U (en) | Prepackage type intelligence electric thing networking sensor | |
| RU164951U1 (en) | INTELLIGENT CONTROL UNIT FOR SWITCHING ELECTRIC NETWORK WITH REVERSE POWER SUPPLY | |
| CN211790398U (en) | Power supply and CPS measurement and control device | |
| CN104682554A (en) | Intelligent power distribution monitoring cabinet | |
| CN107611793A (en) | A kind of Intelligent lower voltage switch cabinet | |
| CN208094283U (en) | A kind of ring main unit distribution power automation terminal of voltage-time type protection | |
| CN202522946U (en) | Fixed temperature and humidity controller | |
| CN111487449A (en) | Wireless intelligent low-voltage measuring terminal | |
| CN216595327U (en) | Intelligent digital quantity detection device and detection circuit | |
| CN218566576U (en) | Multi-multiplexing sensor board based on lora | |
| CN206272213U (en) | A kind of electronic trip unit of twin coil sample strip electric quantity monitoring function | |
| CN109859994A (en) | A kind of electric quantity monitoring attachment and its application method exchanging breaker of plastic casing | |
| CN2667768Y (en) | Intelligent motor controller | |
| CN216774381U (en) | Intelligent power distribution unit | |
| CN219874504U (en) | Safe electricity utilization household electric box based on PLC communication | |
| CN218003593U (en) | Comprehensive state analyzer |
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 |