CN211859589U - Intelligent circuit breaker with parameter acquisition and temperature protection functions - Google Patents
Intelligent circuit breaker with parameter acquisition and temperature protection functions Download PDFInfo
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- CN211859589U CN211859589U CN202020281473.4U CN202020281473U CN211859589U CN 211859589 U CN211859589 U CN 211859589U CN 202020281473 U CN202020281473 U CN 202020281473U CN 211859589 U CN211859589 U CN 211859589U
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- 238000005070 sampling Methods 0.000 claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 18
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- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
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- 230000005540 biological transmission Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000013021 overheating Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of intelligent circuit breaker technique and specifically relates to an intelligent circuit breaker with parameter acquisition and temperature protect function, including the measurement chip, the signal output part of measurement chip is connected with communication unit, its characterized in that: the metering chip is connected with a signal input end of a temperature measuring unit, wherein the temperature measuring unit is respectively arranged in three paths of A, B and C of three-phase power, the temperature measuring unit comprises a temperature sensor and a resistor, the temperature sensor is connected with a port P of the metering chip, the resistor is connected in series between the temperature sensor and the metering chip, when the ambient temperature rises, the resistance value of the temperature sensor drops, the corresponding sampling voltage Heat drops, and then the AD sampling value drops, namely corresponding to each temperature value.
Description
Technical Field
The utility model belongs to the technical field of intelligent circuit breaker technique and specifically relates to an intelligent circuit breaker with parameter acquisition and temperature protect function.
Background
In modern society, industry, agriculture, transportation, national defense, commerce, people's life and other fields are all without electric energy, after electric power is generated, power distribution is an extremely important link in transmission and use of the electric power, electric appliances used by a power distribution system comprise a transformer and various high-low voltage electric equipment, a circuit breaker is an electric product with large use amount and wide range, and the production process of the existing circuit breaker is increasingly pure, but part of the existing circuit breaker is still not enough to be improved.
The prior art circuit breaker has the following problems:
at present, an intelligent circuit breaker on the market does not have a temperature protection function, and most of incoming and outgoing line terminals are designed to be groove structures, so that the installation positions of the incoming and outgoing lines are difficult to identify by naked eyes due to the structural design, connection looseness is easy to cause, contact resistance is increased, the time is slightly long, sparks can be blown out, and further interphase short circuit is caused; or the temperature is increased, so that fire disasters are caused, and certain potential safety hazards are caused. In addition, the circuit power parameters measured by the existing circuit breaker are single, are basically current data, have low precision and can only be used as simple protection data reference. Therefore, an intelligent circuit breaker which can effectively monitor the overheating conditions caused by poor contact of contacts, overlarge current and the like, can acquire more comprehensive parameters and remotely output the data is designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to remedy that current wall-hanging table case can't satisfy whole low pressure and fill electric pile project demands, provide a SMC multi-epitope batch meter that suitable type is extensive, console mode, security performance is high is with hanging metal frame.
The utility model adopts the technical proposal that:
the utility model provides an intelligent circuit breaker with parameter acquisition and temperature protect function, includes the measurement chip, the signal output part of measurement chip is connected with communication unit, its characterized in that: the metering chip is connected with a signal input end of a temperature measuring unit, wherein the temperature measuring unit is respectively installed in three paths of A, B and C of three-phase power, the temperature measuring unit comprises a temperature sensor and a resistor, the temperature sensor is connected with a port P of the metering chip, the resistor is connected in series between the temperature sensor and the metering chip, when the ambient temperature rises, the resistance value of the temperature sensor drops, the corresponding sampling voltage Heat drops, and then the AD sampling value drops, namely each pair corresponds to one temperature value.
Furthermore, a threshold value of an AD sampling value is set for the metering chip, and when the AD sampling value detected by the metering unit is lower than the threshold value, an alarm signal is output outwards through the communication unit.
Furthermore, the metering chip is connected with a signal input end of an information acquisition unit, and the information acquisition unit is respectively used for acquiring A, B, C electric energy of each phase.
Further, the information acquisition unit comprises a current transformer, a rectifier bridge, a resistor and an MOS (metal oxide semiconductor) tube; the current is converted into secondary end current through the current transformer and is accessed, the current signal forms a sampling signal of the metering chip through the control of the MOS tube, the other path of the current signal forms a sampling current signal through the voltage division of the resistor after passing through the rectifier bridge, and the sampling current signal is obtained by entering the metering chip in the conduction state of the MOS tube.
Further, the information acquisition unit performs sampling through an acquisition module, and the acquisition module is respectively used for A, B and C circuits of three-phase power; in the path A, a current signal IA _ P passes through the shunt and the voltage division of R1 and R4, and IA _ N passes through the shunt and the voltage division of R7 and R9 to form potential difference IaP and IaN, and is connected to a sampling port of a metering chip; in the path B, a current signal IB _ P passes through the shunting and voltage division of R11 and R13, and IB _ N passes through the shunting and voltage division of R16 and R17 to form potential difference IbP and IbN, and the potential difference is connected to a sampling port of the metering chip; the current signal IC _ P passes through the shunt and the voltage division of R19 and R21, and IC _ N passes through the shunt and the voltage division of R24 and R27 to form potential difference IcP and IcN, and the potential difference is accessed to a sampling port of the metering chip; the metering chip adopts a differential input mode.
The utility model has the advantages that:
the utility model discloses in, be connected the remote communication function that forms based on intelligent circuit breaker and communication module, monitor each way in to the three-phase electricity, gather the temperature of circuit breaker contact in real time, not only can discover the problem that is difficult to the discovery that appears in wiring or the technology, but also can be timely cut off the hidden danger that probably appears, make things convenient for the maintenance of circuit and guarantee the normal operating of circuit.
In the utility model, the information acquisition unit is adopted to convert the voltage signal in the circuit into the small voltage signal after the resistance voltage division, the small voltage signal is input into the special three-phase metering chip to obtain the high-precision voltage, the current signal is converted into the small voltage signal after passing through the current transformer, the sampling resistor and the operational amplifier, the small voltage signal is input into the singlechip and the effective value of the current is calculated, if the effective value is in the normal current operation range, the current is switched to the end of the metering chip to obtain the high-precision current value, the metering chip can calculate the active power, the reactive power, the power factor and other parameters of the circuit through the input voltage signal and the input current signal, simultaneously, the measurement of the active power and the reactive power can be carried out, the acquisition content of the data is greatly perfected, the measured electric parameters are rich, the precision is high, not only the fault analysis during the data monitoring, but also to meter the electrical energy.
Drawings
Fig. 1 is a schematic block diagram of the present invention;
FIG. 2 is a circuit diagram of a portion of the metering chip of FIG. 1;
FIG. 3 is a circuit diagram of a portion of the temperature sensing unit of FIG. 1;
FIG. 4 is a circuit diagram of a portion of the information acquisition unit of FIG. 1;
fig. 5 is a circuit diagram of a portion of the acquisition module of fig. 1.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The utility model provides an intelligent circuit breaker with parameter acquisition and temperature protect function, includes the measurement chip, the signal output part of measurement chip is connected with the communication unit, the utility model discloses an innovation lies in, the measurement chip is connected with a temperature cell's signal input part, and wherein the temperature cell is installed respectively in the A of three-phase electricity, B, C three routes, the temperature cell includes temperature sensor and resistance, and this temperature sensor is connected with the port P of measurement chip (like P1, P2, P3, P4), establishes ties between it resistance, when ambient temperature rises temperature sensor resistance descend, and the sampling voltage Heat that corresponds descends, and then the AD sampling value descends, every corresponding temperature value promptly.
In this embodiment, a threshold value of the AD sampling value is set for the metering chip, and when the AD sampling value detected by the metering unit is lower than the threshold value, an alarm signal is output through the communication unit.
In this embodiment, the metering chip is connected to a signal input terminal of an information acquisition unit, and the information acquisition unit is respectively configured to acquire A, B, C electric energy of each of three phases.
In this embodiment, the information acquisition unit includes a current transformer, a rectifier bridge, a resistor, and an MOS transistor; the current is converted into secondary end current through the current transformer and is accessed, the current signal forms a sampling signal of the metering chip through the control of the MOS tube, the other path of the current signal forms a sampling current signal through the voltage division of the resistor after passing through the rectifier bridge, and the sampling current signal is obtained by entering the metering chip in the conduction state of the MOS tube. The on and off of the MOS tube are controlled by a pin IC _ CTRL of the single chip microcomputer to be switched.
In this embodiment, the information acquisition unit performs sampling through an acquisition module, and the acquisition module is respectively used for A, B and C circuits of three-phase power; in the path A, a current signal IA _ P passes through the shunt and the voltage division of R1 and R4, and IA _ N passes through the shunt and the voltage division of R7 and R9 to form potential difference IaP and IaN, and is connected to a sampling port of a metering chip; in the path B, a current signal IB _ P passes through the shunting and voltage division of R11 and R13, and IB _ N passes through the shunting and voltage division of R16 and R17 to form potential difference IbP and IbN, and the potential difference is connected to a sampling port of the metering chip; the current signal IC _ P passes through the shunt and the voltage division of R19 and R21, and IC _ N passes through the shunt and the voltage division of R24 and R27 to form potential difference IcP and IcN, and the potential difference is accessed to a sampling port of the metering chip; the metering chip adopts a differential input mode, and after calculation, the information after calculation is transmitted to the metering chip through the SPI communication interface.
In this embodiment, the communication unit may adopt a wired communication mode or a wireless communication mode, wherein the wired communication mode may adopt 485 communication, and the main functions of the communication unit are information acquisition of the device and use during device debugging; the wireless communication mainly uses a carrier communication mode and the like to realize wireless transmission of data so as to control the equipment.
The utility model discloses a working process is:
when the utility model is used, when being installed, the upper box body and the lower box body are integrally manufactured, in addition, the back plates of the upper box body and the lower box body can also be integrally welded and fixed as the same reference plate, and then the upper box body and the lower box body are placed at the position to be fixed, are limited by pouring a cement foundation and are fixed by an anchorage device; then can will fix through table case embedded groove and suspension type table case to the equipment and the connection of complete corresponding circuit.
The utility model discloses in, because wall-hanging table case is the most commonly used structure at present, consequently, adopt vertical frame to carry out supporting. The upper box body and the lower box body which are separated from the vertical frame are divided according to the identity of a user while the functions are divided, the upper box body is used for daily use, and the lower box body is used for maintenance of operators. Because the installation position of the device is not fixed, such as different areas of a ground warehouse or the outdoors, the flexibility of the device can be well improved by matching the opening made at the bottom of the lower box body with a cement foundation poured in place, the requirements on the flatness and the foundation of the original bottom surface are low, structural members for fixing the device are reduced, and the occupied area is reduced. The setting of cardboard is used for carrying out an organic whole through ground tackle and cement foundation and fixes, prevents that vertical frame from empting, promotes its stability.
The utility model discloses in, the acid-resistant steel of stainless constitutes, compares the iron frame structure and has good corrosion resistance, and live time is long, and anti external damage performance is higher, is equipped with simultaneously and connects the electrical ring, ensures equipment security.
The utility model discloses in, the setting of breakwater can prevent effectively that rainwater infiltration from showing the case, and the end back-off prevents that the pointed end from colliding with.
The utility model discloses in, the clearance that forms between suspension type table case and the last box backplate is used for being connected and the guide of cable, and hoisting device's aesthetic property goes up the transparent panel that inlays the dress in the box, combines SMC suspension type table case characteristics can be surveyed its inside structure at a glance, effectively prevents to steal the emergence of electric problem.
Claims (5)
1. The utility model provides an intelligent circuit breaker with parameter acquisition and temperature protect function, includes the measurement chip, the signal output part of measurement chip is connected with communication unit, its characterized in that: the metering chip is connected with a signal input end of a temperature measuring unit, wherein the temperature measuring unit is respectively arranged in three paths of A, B and C of three-phase power, the temperature measuring unit comprises a temperature sensor and a resistor, the temperature sensor is connected with a port P of the metering chip, the resistor is connected in series between the temperature sensor and the metering chip, when the ambient temperature rises, the resistance value of the temperature sensor drops, the corresponding sampling voltage Heat drops, and then the AD sampling value drops, namely corresponding to each temperature value.
2. The intelligent circuit breaker with parameter collection and temperature protection functions of claim 1, wherein: and setting a threshold value of the AD sampling value for the metering chip, and outputting an alarm signal outwards through the communication unit when the AD sampling value detected by the metering unit is lower than the threshold value.
3. The intelligent circuit breaker with parameter acquisition and temperature protection functions according to claim 1 or 2, characterized in that: the metering chip is connected with a signal input end of an information acquisition unit, and the information acquisition unit is respectively used for acquiring A, B, C electric energy of each phase.
4. A smart circuit breaker with parameter acquisition and temperature protection functions as claimed in claim 3, characterized in that: the information acquisition unit comprises a current transformer, a rectifier bridge, a resistor and an MOS (metal oxide semiconductor) tube; the current is converted into secondary end current through the current transformer and is accessed, the current signal forms a sampling signal of the metering chip through the control of the MOS tube, the other path of the current signal forms a sampling current signal through the voltage division of the resistor after passing through the rectifier bridge, and the sampling current signal is obtained by entering the metering chip in the conduction state of the MOS tube.
5. The intelligent circuit breaker with parameter collection and temperature protection functions as claimed in claim 4, wherein: the information acquisition unit samples through an acquisition module, and the acquisition module is respectively adopted for A, B and C circuits of three-phase power; in the path A, a current signal IA _ P passes through the shunt and the voltage division of R1 and R4, and IA _ N passes through the shunt and the voltage division of R7 and R9 to form potential difference IaP and IaN, and is connected to a sampling port of a metering chip; in the path B, a current signal IB _ P passes through the shunting and voltage division of R11 and R13, and IB _ N passes through the shunting and voltage division of R16 and R17 to form potential difference IbP and IbN, and the potential difference is connected to a sampling port of the metering chip; the current signal IC _ P passes through the shunt and the voltage division of R19 and R21, and IC _ N passes through the shunt and the voltage division of R24 and R27 to form potential difference IcP and IcN, and the potential difference is accessed to a sampling port of the metering chip; the metering chip adopts a differential input mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281473.4U CN211859589U (en) | 2020-03-10 | 2020-03-10 | Intelligent circuit breaker with parameter acquisition and temperature protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281473.4U CN211859589U (en) | 2020-03-10 | 2020-03-10 | Intelligent circuit breaker with parameter acquisition and temperature protection functions |
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| Publication Number | Publication Date |
|---|---|
| CN211859589U true CN211859589U (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020281473.4U Active CN211859589U (en) | 2020-03-10 | 2020-03-10 | Intelligent circuit breaker with parameter acquisition and temperature protection functions |
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| Country | Link |
|---|---|
| CN (1) | CN211859589U (en) |
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2020
- 2020-03-10 CN CN202020281473.4U patent/CN211859589U/en active Active
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