CN215344084U - Drawer type switch cabinet monitoring device, drawer type switch cabinet and motor protection structure - Google Patents
Drawer type switch cabinet monitoring device, drawer type switch cabinet and motor protection structure Download PDFInfo
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- CN215344084U CN215344084U CN202120677937.8U CN202120677937U CN215344084U CN 215344084 U CN215344084 U CN 215344084U CN 202120677937 U CN202120677937 U CN 202120677937U CN 215344084 U CN215344084 U CN 215344084U
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Abstract
The application discloses drawer type switch cabinet monitoring devices, drawer type switch cabinet and motor protection architecture. The monitoring device includes: a display unit and a measurement assembly; the measuring component comprises a base meter module, a voltage and current sampling module, a temperature sampling module and a digital signal input and output module, wherein the base meter module is respectively connected with the display unit, the voltage and current sampling module, the temperature sampling module and the digital signal input and output module; the measuring assembly is connected with an incoming line and/or an outgoing line of the drawer type switch cabinet so as to directly measure the incoming line temperature and/or the outgoing line temperature through the temperature sampling module. The temperature sampling module in the monitoring device measuring component is connected with the inlet wire and/or the outlet wire of the drawer type switch cabinet, so that the temperature detection is more accurate, and meanwhile, the monitoring device is simple in structure, small in required installation space and low in hardware cost.
Description
Technical Field
The application relates to the field of electrical equipment, in particular to a drawer type switch cabinet monitoring device, a drawer type switch cabinet and a motor protection structure.
Background
The functional units of the drawer type switch cabinet are separated from the bus or the cable by a grounded metal plate or a functional plate made of plastic, so that three areas of the bus, the functional units and the cable are formed. The drawer type switch cabinet has higher reliability, safety and interchangeability, is a more advanced switch cabinet, and most of the switch cabinets produced at present are drawer type switch cabinets, and the drawer type switch cabinets are suitable for industrial and mining enterprises and high-rise buildings which require higher power supply reliability and serve as centralized control power distribution centers.
The drawer type switch cabinet is internally composed of a plurality of parts such as an incoming line connector, an outgoing line connector, a molded case circuit breaker, a digital display meter, a mutual inductor and a drawer, and the drawer type switch cabinet is commonly used in the following three monitoring modes, namely a first mode: the drawer type switch cabinet adopts a digital display instrument as monitoring components of voltage, current, power, frequency and the like in the drawer type switch cabinet, the external current transformer is required in the monitoring mode, the 5A-turn small current transformer is also required in the digital display instrument, the cost is increased, the occupied space is larger, and the miniaturization or the expansion of more components is not facilitated; incoming line and outgoing line temperatures cannot be accurately measured; the second method comprises the following steps: the drawer type switch cabinet adopts a mode of adding a digital display instrument and a wireless temperature measuring wrist strap, and the installation position of the wireless temperature measuring wrist strap is not easy to test the highest temperature point on a circuit in such a mode, and needs to occupy a certain position, so that the cost is increased; the third method comprises the following steps: the drawer type switch cabinet adopts a low-voltage power distribution solution, and the drawer type switch cabinet can only be arranged at an outlet wire or an inlet wire end of the molded case circuit breaker in such a way, and needs to be provided with a power supply independently, so that wiring is increased.
SUMMERY OF THE UTILITY MODEL
The application provides a drawer type switch cabinet monitoring devices, drawer type switch cabinet and motor protection architecture to drawer type switch cabinet monitoring devices structure is complicated among the solution prior art, and the circuit is complicated, and the hardware is with high costs, and the inside business turn over line temperature's of unable accurate monitoring drawer type switch cabinet technical problem.
In one aspect, the present application provides a drawer type switch cabinet monitoring devices, drawer type switch cabinet and motor protection architecture, monitoring devices includes:
a display unit and a measurement assembly;
the measuring assembly comprises a base meter module, a voltage and current sampling module, a temperature sampling module and a digital signal input and output module, wherein the base meter module is respectively in communication connection with the display unit, the voltage and current sampling module, the temperature sampling module and the digital signal input and output module;
the measuring assembly is connected with an incoming line and/or an outgoing line of the drawer type switch cabinet so as to directly measure the incoming line temperature and/or the outgoing line temperature through the temperature sampling module.
In some possible implementations, the base table module includes a first connector, a voltage sampling circuit, a current sampling circuit, a three-phase metering unit, an ac-dc converter, and a system-on-chip;
one end of the first connector is connected with the voltage and current sampling module, and the other end of the first connector is respectively connected with the voltage sampling circuit, the current sampling circuit and the alternating current-direct current converter;
the other ends of the voltage sampling circuit and the current sampling circuit are connected with the three-phase metering unit, and the voltage sampling circuit and the current sampling circuit are used for receiving a target voltage signal and a target current signal sent by the voltage and current sampling module and sending the target voltage signal and the target current signal to the three-phase metering unit;
the three-phase metering unit is arranged on the system-on-chip, a programmable gain amplifier and an analog-to-digital converter are arranged in the three-phase metering unit, and the three-phase metering unit is used for processing the target voltage signal and generating a voltage and current detection result.
In some possible implementation manners, the base meter module further includes a second connector, a first voltage stabilizer, a second voltage stabilizer, an incoming line temperature acquisition circuit, an RS485 circuit, and a display unit interface;
the alternating current-direct current converter is connected with an isolation circuit, wherein the first path of isolation circuit is supplied to the system-on-chip through the first voltage stabilizer, and the second path of isolation circuit is supplied to the RS485 circuit through the second voltage stabilizer;
one end of the second connector is connected with the temperature sampling module, the other end of the second connector is connected with the incoming line temperature acquisition circuit, and the second connector is used for receiving the temperature detection result sent by the temperature sampling module and sending the temperature detection result to the incoming line temperature acquisition circuit;
the display unit interface is connected with the system-on-chip and used for receiving the processing result of the system-on-chip and sending the processing result to the display unit.
In some possible implementations, the base table module includes an outgoing line temperature terminal and an outgoing line temperature acquisition circuit;
one end of the outgoing line temperature terminal is connected with an outgoing line of the drawer type switch cabinet, and the other end of the outgoing line temperature terminal is connected with the outgoing line temperature acquisition circuit;
and the outlet temperature terminal is used for receiving the outlet temperature acquired by the temperature sampling module, transmitting the outlet temperature to a system-on-chip in the base meter module through an outlet temperature acquisition circuit, and converting the outlet temperature into a temperature signal through calculation.
In some possible implementations, the voltage and current sampling module includes a conversion unit;
the voltage and current sampling module is connected with the base meter module through a first connector;
the voltage and current sampling module is used for collecting a target voltage signal and an initial current signal, and the conversion unit is used for converting the initial current signal into a target current signal;
the first connector is used for receiving a target voltage signal and a target current signal sent by a voltage and current sampling module and sending the target voltage signal and the target current signal to the base table module.
In some possible implementations, the temperature sampling module is connected to the second connector by a refractory wire;
the temperature sampling module is connected with the base meter module through the second connector.
In some possible implementations, the temperature sampling module includes a temperature sensor, and the temperature sensor is one or more of an NTC thermistor, a PTC100, a PTC1000, and a thermocouple.
In some possible implementation manners, the digital signal input/output module includes a digital signal input terminal, a semaphore acquisition circuit, an isolation device, a third connector, a relay driving circuit, a relay, and a digital signal output terminal, which are sequentially in communication connection;
and the digital signal input and output module is connected with the base meter module through a third connector.
In some possible implementation manners, the display unit includes a microprocessor unit, a real-time clock chip is disposed in the microprocessor unit, and the real-time clock chip is configured to transmit a clock to the base table module.
In some possible implementation manners, the display unit, a display unit interface of the display unit, is connected with the micro-processing unit through a third voltage stabilizer, and the third voltage stabilizer is connected with the power-on and power-off detection circuit in parallel; the micro-processing unit is connected with the battery module, the battery module is connected with the battery voltage detection module in parallel, the power supply voltage detected by the upper and lower electric detection circuits and the battery voltage detection module is compared, if the power supply voltage detected by the upper and lower electric detection circuits is high, the power is supplied to the micro-processing unit through the third voltage stabilizer, and if the power supply voltage detected by the battery voltage detection module is high, the power is supplied to the micro-processing unit through the battery module.
On the other hand, in some possible implementations, a withdrawable switchgear cabinet provided with a withdrawable switchgear cabinet monitoring device as described in any of the above;
the drawer type switch cabinet comprises a temperature sensing assembly and a circuit breaker;
the temperature sensing assembly is in communication connection with the circuit breaker and the monitoring device in sequence.
In some possible implementations, the drawer type switch cabinet includes an incoming line plug-in and an outgoing line plug-in, the temperature sensing assembly includes an incoming line temperature sensor assembly or an outgoing line temperature sensor assembly,
the incoming line plug-in is connected with one end of the monitoring device, the other end of the monitoring device is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the outgoing line temperature sensor assembly, and the other end of the outgoing line temperature sensor assembly is connected with the outgoing line plug-in; or the like, or, alternatively,
the incoming line plug-in is connected with one end of the outgoing line temperature sensor assembly, the other end of the outgoing line temperature sensor assembly is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the monitoring device, and the other end of the monitoring device is connected with the outgoing line plug-in.
On the other hand, in some possible implementation manners, the motor protection structure is provided with a drawer type switch cabinet monitoring device, or the drawer type switch cabinet is included in the motor protection structure, and the monitoring device in the motor protection structure is connected to the motor through an alternating current contactor.
In some possible implementation manners, the monitoring device in the motor protection structure is connected with a circuit breaker, the circuit breaker is connected with a leakage current transformer, and the leakage current transformer is connected with the alternating current contactor.
The application provides drawer type switch cabinet monitoring devices, drawer type switch cabinet and motor protection architecture, monitoring devices includes: a display unit and a measurement assembly; the measuring component comprises a base meter module, a voltage and current sampling module, a temperature sampling module and a digital signal input and output module, wherein the base meter module is respectively connected with the display unit, the voltage and current sampling module, the temperature sampling module and the digital signal input and output module; the measuring assembly is connected with an incoming line and/or an outgoing line of the drawer type switch cabinet so as to directly measure the incoming line temperature and/or the outgoing line temperature through the temperature sampling module. In the embodiment of the application, the measuring assembly of the monitoring device and the inlet wire and/or the outlet wire row of the drawer type switch cabinet form a whole, and the highest point of the internal temperature of the inlet wire and/or the outlet wire can be directly measured, so that the temperature detection is more accurate, the situation that the position of the monitoring assembly is limited by the installation position of the circuit breaker when the monitoring assembly is connected to the circuit breaker is avoided, and the installation position is flexible; meanwhile, the monitoring assembly is arranged inside the drawer type switch cabinet in the embodiment, a power supply module does not need to be additionally installed, the whole circuit of the monitoring device is simple, the size is small, and extra hardware cost is not needed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a base meter module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a voltage and current sampling module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a digital signal input/output module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a display unit in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure;
fig. 6 is a schematic view of a scene structure of a drawer type switch cabinet according to an embodiment of the present application;
fig. 7 is a schematic view of another scenario structure of the drawer-type switch cabinet according to an embodiment of the present application;
fig. 8 is a schematic view of a specific application scenario of the monitoring device applied to the motor protection structure according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a drawer type switch cabinet monitoring device provided in an embodiment of the present application.
The drawer type switch cabinet monitoring device in the embodiment of the application can be applied to a drawer type switch cabinet, and the structure of the drawer type switch cabinet is not limited.
The drawer type switch cabinet monitoring device comprises a display unit 100 and a measuring component 200;
the display unit 100 mainly performs functions such as measurement data display, parameter configuration, and key input, and the display unit 100 is also called a display or a monitor. The display unit 100 belongs to an input and output device, the display unit 100 is a screen for displaying electronic data converted by a specific device, and the display unit 100 is connected with the measuring component 200 and arranged on the shell of the drawer type switch cabinet.
The measurement assembly 200 comprises a base meter module 210, a voltage and current sampling module 220, a temperature sampling module 230, and a digital signal input/output module 240, wherein the base meter module 210 is respectively connected with the display unit 100, the voltage and current sampling module 220, the temperature sampling module 230, and the digital signal input/output module 240 in a communication manner; that is, the base table module 210 serves as a core device, a chip is disposed in the base table module 210, data sent by the voltage/current sampling module 220, the temperature sampling module 230, and the digital signal input/output module 240 are processed by a data processing program in the chip of the base table module 210, and the processed data are sent to the display unit 100 for display.
The measuring assembly 200 is connected with the incoming and/or outgoing line of the drawer type switchgear to directly measure the incoming and/or outgoing line temperature through the temperature sampling module 230 in the measuring assembly 200.
The monitoring device in this embodiment is composed of a display unit 100 and a measuring component 200. The measurement component 200 supports the drawer type switch cabinet to form a whole with the incoming line and/or the outgoing line, and the highest temperature point inside the incoming line and the outgoing line can be directly measured, so that the temperature detection is more accurate, and the situation that the position of the monitoring component 200 is limited by the installation position of the breaker when the monitoring component is connected to the breaker is avoided; meanwhile, in the embodiment, the monitoring component 200 is disposed inside the drawer-type switch cabinet, and a power module does not need to be additionally installed, so that the overall circuit of the monitoring device is simple, the size is small, and extra hardware cost is not needed.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a base meter module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure.
Further, in some embodiments of the present application, the base table module 210 includes a first connector 211(a), a voltage sampling circuit 212(a), a current sampling circuit 212(b), a three-phase metering unit 213, a second connector 211(b), a first voltage stabilizer 214(a), a second voltage stabilizer 214(b), an incoming line temperature acquisition circuit 215, an ac-dc converter 216, a system-on-chip 217, an RS485 circuit 218, and a display unit interface 219;
one end of the first connector 211(a) is connected to the voltage and current sampling module 220, and the other end of the first connector 211(a) is connected to the voltage sampling circuit 212(a), the current sampling circuit 212(b) and the ac-dc converter 216, respectively.
The other end of the voltage sampling circuit 212(a) and the other end of the current sampling circuit 212(b) are connected to the three-phase metering unit 213, and the voltage sampling circuit 212(a) and the current sampling circuit 212(b) are used for receiving a target voltage signal and a target current signal sent by the voltage and current sampling module 220 and sending the target voltage signal and the target current signal to the three-phase metering unit 213.
The three-phase metering unit 213 is disposed in the soc 217, a programmable gain amplifier (also called PGA) and an analog-to-digital converter are disposed in the three-phase metering unit 213, and the three-phase metering unit 213 is configured to process a target voltage signal and a target current signal and generate a voltage current detection result, specifically, the analog-to-digital converter in the three-phase metering unit 213 processes the target voltage signal and the target current signal and converts the target voltage signal and the target current signal to form electrical parameters such as active power, reactive power, apparent power, fundamental electric energy, harmonic electric energy, frequency, demand, and the like; in addition, the three-phase metering unit 213 provides fault detection functions such as a wrong wiring alarm function, short circuit and power failure detection, overvoltage and overcurrent detection, residual current detection, voltage sequence fault detection, voltage loss indication, voltage sag detection and the like.
The other end of the AC-DC converter 216 (also called three-phase AC/DC) is connected to the first voltage stabilizer 214(a) and the second voltage stabilizer 214(b), the other end of the first voltage stabilizer 214(a) is connected to the soc 217, the other end of the second voltage stabilizer 214(b) is connected to one end of the RS485 circuit 218, the other end of the RS485 circuit is connected to the soc, the AC-DC converter 216 is used for an output isolation circuit, the isolation circuit includes at least two paths, specifically:
the first isolation circuit is a circuit supplied to the soc 217 through the first regulator 214(a), wherein the soc 217 is also called System on Chip, and is an integrated circuit with a dedicated target, which includes a complete System and has all contents of embedded software; in the present embodiment, the system-on-chip 217 is an RN2026 chip including components such as a CPU and a three-phase metering unit. In addition, the first isolation circuit may be further connected to an EEPROM (Electrically Erasable and Programmable read only memory, chinese full name: Electrically Erasable and Programmable read only memory) through the first voltage regulator 214(a), the EEPROM is a memory chip with no data loss after power failure, the EEPROM may erase existing information on a computer or a dedicated device and be reprogrammed, and then the EEPROM is connected to the system level chip 217 to implement information recording.
The second path of isolation circuit is supplied to the RS485 circuit (218) through the second voltage stabilizer 214 (b); that is, one end of the second voltage stabilizer 214(b) is connected to the ac-dc converter 216, the other end of the second voltage stabilizer 214(b) is connected to one end of the RS485 circuit (218), and the other end of the RS485 circuit (218) is connected to one end of a UART (Universal Asynchronous Receiver/Transmitter, chinese); data to be transmitted is converted between serial communication and parallel communication by the UART, which is a chip that converts a parallel input signal into a serial output signal, and is usually integrated into a connection node of another communication interface, and the other end of the UART is connected to the system-on-chip 217.
One end of the second connector 211(b) is connected to the temperature sampling module 230, the other end of the second connector 211(b) is connected to the incoming line temperature acquisition circuit 215, and the second connector 212(b) is configured to receive the temperature detection result sent by the temperature sampling module 230 and send the temperature detection result to the incoming line temperature acquisition circuit 215;
the display unit interface 219 is connected to the soc 217, and the display unit interface 219 is configured to receive a processing result of the soc 217 and send the processing result to the display unit 100.
In this embodiment, the target voltage signal and the target current signal transmitted from the voltage/current sampling module 220 are transmitted to the three-phase metering unit 213 in the soc 217 through the voltage sampling circuit 212(a) and the current sampling circuit 212(b), respectively. The external leakage current transformer is connected to the leakage current transformer interface, and is connected to the current sampling circuit 212(b) through the leakage current transformer interface and transmitted to the three-phase metering unit 213 in the system-on-chip.
In addition, in this embodiment, the input voltage of the first voltage regulator 214(a) is divided by resistors and then supplied to the internal comparator of the soc for power-up and power-down detection. The A, B, C three-phase copper bar temperature signals of the second connector 211(b) and the temperature sampling module 230 are transmitted to the inside of the system-on-chip 217 through the incoming line temperature acquisition circuit 215 and are converted into temperature signals through calculation. The system-level chip 217 is responsible for communicating with the outside through the RS485 circuit 218, transmits data such as temperature, voltage, current, power, electric energy, frequency, demand and the like to the outside, and integrates more data devices in the base meter module 210 to realize comprehensive acquisition and processing of data.
Further, in some embodiments of the present application, the base table module 210 includes an outgoing line temperature terminal 311 and an outgoing line temperature acquisition circuit 312; one end of the outgoing line temperature terminal 311 is connected with the outgoing line of the drawer type switch cabinet, and the other end of the outgoing line temperature terminal 311 is connected with the outgoing line temperature acquisition circuit 312; and the outlet temperature terminal 311 is configured to receive the outlet temperature collected by the temperature sampling module 230, transmit the outlet temperature to the system-on-chip 217 in the base table module 210 through the outlet temperature collecting circuit 312, and convert the outlet temperature into a temperature signal through calculation.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a voltage and current sampling module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure.
Further, in some embodiments of the present application, the voltage-current sampling module 220 includes a converting unit; the voltage and current sampling module 220 is connected with the base meter module through a first connector;
the voltage and current sampling module 220 is configured to collect a target voltage signal and an initial current signal, and the conversion unit is configured to convert the initial current signal into a target current signal; the first connector 211(a) is configured to receive a target voltage signal and a target current signal sent by the voltage and current sampling module 211, and send the target voltage signal and the target current signal to the base table module 210.
In this embodiment, the voltage and current sampling module 220 is configured to process the collected voltage signal and current signal, so that the monitoring of the current and voltage in the drawer-type switch cabinet is more accurate.
Further, in some embodiments of the present application, the temperature sampling module 230 is connected to the second connector 211(b) by a refractory wire; the temperature sampling module 230 is connected to the base table module 210 via the second connector 211 (b). The temperature sampling module comprises a temperature measuring sensor, and the temperature measuring sensor is one or more of an NTC thermistor, a PTC100, a PTC1000 and a thermocouple.
That is, in the present embodiment, an NTC ceramic-insulated temperature measuring resistor is used as a temperature measuring sensor, connected to the second connector 211(b) through a high temperature resistant wire, and transferred to the base meter module 211. Wherein: ntc (negative Temperature coefficient) refers to a thermistor phenomenon and material having a negative Temperature coefficient, in which the resistance decreases exponentially with the Temperature rise. The material is a semiconductor ceramic which is prepared by fully mixing, molding, sintering and other processes of two or more than two metal oxides of manganese, copper, silicon, cobalt, iron, nickel, zinc and the like, and can be prepared into a thermistor with a Negative Temperature Coefficient (NTC). The resistivity and the material constant of the material change along with different material component ratios, sintering atmosphere, sintering temperature and structural states; non-oxide NTC thermistor materials typified by silicon carbide, tin selenide, tantalum nitride, and the like have been developed.
In this embodiment, the temperature sampling module 230 is directly disposed on the incoming line or the outgoing line, so as to directly collect the temperature, and the collected temperature is higher, and therefore, the temperature sampling module 230 is disposed to be connected to the second connector 211(b) through a high temperature resistant line, so as to ensure the accuracy and safety of temperature collection.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a digital signal input/output module in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure.
Further, in some embodiments of the present application, the digital signal input and output module 240 includes a digital signal input terminal 241, a semaphore acquisition circuit 242, an isolation device 243, a third connector 244, a relay driving circuit 245, a relay 246, and a digital signal output terminal 247, which are sequentially connected in a communication manner; the digital signal input output module is connected 240 to the base table module 210 via a third connector 244. In this embodiment, the digital signal input/output module 240 collects and processes incoming signals, so as to conveniently realize accurate data processing and ensure simple monitoring structure.
Further, in some embodiments of the present application, the display unit includes a micro-processing unit, and a real-time clock chip is disposed in the micro-processing unit, and the real-time clock chip is configured to transmit a clock to the base table module. That is to say, the microprocessor unit is internally provided with a real-time Clock chip (RTC, which is called as real time Clock), the RTC is an integrated circuit and is generally called as a Clock chip, the real-time Clock chip provides accurate real-time for people or provides accurate time reference for an electronic system, the real-time Clock chip has the capability of keeping the Clock normal when electricity is available and power is cut off, and can transmit the Clock to the base table module through the display unit interface, so that the base table module can perform some records related to time, such as day freezing, event recording and the like, and the function of recording data in real time is realized.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display unit in a drawer type switch cabinet monitoring device according to an embodiment of the present disclosure.
Further, in some embodiments of the present disclosure, the display Unit 100 is provided to a micro processing Unit (MCU) after competing with a battery power supply via a third voltage regulator, a diode, and a diode. The display unit interface has two functions of power supply and communication. After power supply competes with battery power supply through the diode and the third voltage stabilizer (high-voltage power supply) through the diode, the power is supplied to the microprocessing unit MCU. The third voltage stabilizer is connected with the micro-processing unit and is connected with the power-on and power-off detection circuit in parallel; the micro-processing unit is connected with the battery module, the battery module is connected with the battery voltage detection module in parallel, the power supply voltage detected by the upper and lower electric detection circuits and the battery voltage detection module is compared, if the power supply voltage detected by the upper and lower electric detection circuits is high, the power is supplied to the micro-processing unit through the third voltage stabilizer, and if the power supply voltage detected by the battery voltage detection module is high, the power is supplied to the micro-processing unit through the battery module.
In addition, the present embodiment may further include a power up/down detection circuit for detecting whether the power supplied by the display unit interface is normal. The battery voltage detection is used for detecting whether the battery is under-voltage. The MCU is internally provided with an RTC (real time clock), has the capability of keeping the clock normal when the electricity is available and the power is cut off, and can transmit the clock to the base meter module 211 through the display unit interface, so that the base meter module 211 can conveniently carry out some records related to the time, such as day freezing, event recording and the like. The display unit can comprehensively display the monitoring data in the embodiment, so that the user can conveniently check the monitoring data.
Referring to fig. 6 and 7, fig. 6 is a schematic view of a scene structure of a drawer type switch cabinet according to an embodiment of the present application; fig. 7 is a schematic view of another scenario structure of the drawer-type switch cabinet according to an embodiment of the present application.
Based on the drawer type switch cabinet monitoring device, an embodiment of the drawer type switch cabinet is provided, wherein the drawer type switch cabinet in the embodiment is provided with the drawer type switch cabinet monitoring device;
the drawer type switch cabinet comprises a temperature sensing assembly and a circuit breaker;
the temperature sensing assembly is in communication connection with the circuit breaker and the monitoring device in sequence.
In the embodiment, the drawer type switch cabinet comprises an incoming line plug-in and an outgoing line plug-in, and the temperature sensing assembly comprises an incoming line temperature sensor assembly or an outgoing line temperature sensor assembly;
when the monitoring device is installed at a wire inlet end of a drawer type switch cabinet, the wire inlet plug-in is connected with one end of the monitoring device, the other end of the monitoring device is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the wire outlet temperature sensor assembly, and the other end of the wire outlet temperature sensor assembly is connected with the wire outlet plug-in; or the like, or, alternatively,
when the monitoring device is installed at the wire outlet end of the drawer type switch cabinet, the wire inlet plug-in is connected with one end of the wire outlet temperature sensor assembly, the other end of the wire outlet temperature sensor assembly is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the monitoring device, and the other end of the monitoring device is connected with the wire outlet plug-in.
In addition, it can be understood by those skilled in the art that the temperature sensor assembly in the monitoring device may also be installed at the incoming line end or the outgoing line end of the circuit breaker, or may be installed inside other components, and in order to accurately measure the temperature of the incoming line end or the outgoing line end in the embodiment of the present application, the temperature sensor assembly is installed at the incoming line end or the outgoing line end of the drawer type switch cabinet, and if there is an electronic component with a higher temperature in the drawer type switch cabinet, a temperature sensing and detecting device may be installed around the electronic component, so as to achieve accurate temperature detection.
In this embodiment, the intelligent monitoring device for the drawer switch and the incoming line connector form a whole, and the whole is used for measuring data such as voltage, current, active power, reactive power, apparent power, frequency, accumulated electric energy, demand, incoming line temperature and appearance temperature. And alarm information such as overcurrent alarm, overtemperature alarm, overvoltage alarm, undervoltage alarm, power-on alarm, open-phase alarm, reverse phase sequence alarm, frequency overrun alarm, temperature measurement circuit abnormality alarm, voltage unbalance alarm, current unbalance alarm, leakage current overrun alarm and the like is generated, so that the drawer type switch cabinet has a simpler structure and lower cost.
Referring to fig. 8, fig. 8 is a schematic view of a specific application scenario of the monitoring device applied to the motor protection structure according to an embodiment of the present application.
The embodiment provides a motor protection structure, wherein the motor protection structure is provided with a drawer type switch cabinet monitoring device, or the motor protection structure comprises the drawer type switch cabinet in the embodiment, and the monitoring device in the motor protection structure is connected to a motor through an alternating current contactor.
In some embodiments of the present application, the monitoring device is connected to a circuit breaker in the motor protection structure, the circuit breaker is connected to a leakage current transformer, and the leakage current transformer is connected to the ac contactor. Specifically, the monitoring device in this embodiment is connected to a circuit breaker, wherein the type of the circuit breaker is not limited, for example, the circuit breaker may be a molded case circuit breaker, the leakage current transformer is connected to an ac contactor, the ac contactor includes an ac contactor 1 (forward direction) and an ac contactor 2 (reverse direction), the circuit breaker is connected to the leakage current transformer, and the circuit breaker, the leakage current transformer and the monitoring device perform a motor protection operation based on detected circuit information.
In this embodiment, the monitoring device in the above embodiment is disposed in the motor protection structure, or the drawer type switch cabinet in the motor protection structure is connected to the drawer type switch cabinet through the motor, so that the motor protection function can be supported, and the motor protection functions such as thermal overload protection, blocking protection, time protection, start timeout protection, single-phase ground protection (or called leakage protection), current open-phase protection, current unbalance protection, current reverse-phase sequence protection, underload protection, undervoltage protection, overvoltage protection, voltage unbalance protection, voltage reverse-phase sequence protection, voltage loss restart protection, external fault protection, contactor fault protection, and lock-rotor protection are supported.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
In a specific implementation, each component or structure may be implemented as an independent entity, or may be combined arbitrarily and implemented as one or several entities, and the specific implementation of each component or structure may refer to the foregoing embodiments, which are not described herein again.
The drawer type switch cabinet monitoring device, the drawer type switch cabinet and the motor protection structure provided by the embodiment of the application are introduced in detail, a specific example is applied in the description to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (13)
1. A drawer type switch cabinet monitoring device, characterized in that, monitoring device includes:
a display unit and a measurement assembly;
the measuring assembly comprises a base meter module, a voltage and current sampling module, a temperature sampling module and a digital signal input and output module, wherein the base meter module is in communication connection with the display unit, the voltage and current sampling module, the temperature sampling module and the digital signal input and output module;
the measuring assembly is connected with an incoming line and/or an outgoing line of the drawer type switch cabinet so as to directly measure the incoming line temperature and/or the outgoing line temperature through the temperature sampling module.
2. The withdrawable switchgear monitoring device according to claim 1, characterized in that, the base meter module comprises a first connector, a voltage sampling circuit, a current sampling circuit, a three-phase metering unit, an ac-dc converter and a system-on-chip;
one end of the first connector is connected with the voltage and current sampling module, and the other end of the first connector is respectively connected with the voltage sampling circuit, the current sampling circuit and the alternating current-direct current converter;
the other ends of the voltage sampling circuit and the current sampling circuit are connected with the three-phase metering unit, and the voltage sampling circuit and the current sampling circuit are used for receiving a target voltage signal and a target current signal sent by the voltage and current sampling module and sending the target voltage signal and the target current signal to the three-phase metering unit;
the three-phase metering unit is arranged on the system-on-chip, a programmable gain amplifier and an analog-to-digital converter are arranged in the three-phase metering unit, and the three-phase metering unit is used for processing the target voltage signal and generating a voltage and current detection result.
3. The drawer-type switchgear monitoring device of claim 2, wherein the base meter module further comprises a second connector, a first voltage regulator, a second voltage regulator, an incoming line temperature acquisition circuit, an RS485 circuit, and a display unit interface;
the alternating current-direct current converter is connected with an isolation circuit, wherein the first path of isolation circuit is supplied to the system-on-chip through the first voltage stabilizer, and the second path of isolation circuit is supplied to the RS485 circuit through the second voltage stabilizer;
one end of the second connector is connected with the temperature sampling module, the other end of the second connector is connected with the incoming line temperature acquisition circuit, and the second connector is used for receiving the temperature detection result sent by the temperature sampling module and sending the temperature detection result to the incoming line temperature acquisition circuit;
the display unit interface is connected with the system-on-chip and used for receiving the processing result of the system-on-chip and sending the processing result to the display unit.
4. The drawer switch cabinet monitoring device of claim 1, wherein the base meter module comprises an outgoing line temperature terminal and an outgoing line temperature acquisition circuit;
one end of the outgoing line temperature terminal is connected with an outgoing line of the drawer type switch cabinet, and the other end of the outgoing line temperature terminal is connected with the outgoing line temperature acquisition circuit;
and the outlet temperature terminal is used for receiving the outlet temperature acquired by the temperature sampling module, transmitting the outlet temperature to a system-on-chip in the base meter module through an outlet temperature acquisition circuit, and converting the outlet temperature into a temperature signal through calculation.
5. The drawer-type switchgear monitoring device of claim 1, wherein the voltage and current sampling module comprises a transforming unit;
the voltage and current sampling module is connected with the base meter module through a first connector;
the voltage and current sampling module is used for collecting a target voltage signal and an initial current signal, and the conversion unit is used for converting the initial current signal into a target current signal;
the first connector is used for receiving a target voltage signal and a target current signal sent by a voltage and current sampling module and sending the target voltage signal and the target current signal to the base table module.
6. The withdrawable switchgear monitoring device according to claim 1, wherein the temperature sampling module is connected with the base meter module through a second connector, the temperature sampling module comprises a temperature measuring sensor, the temperature measuring sensor is one or more of NTC thermistor, PTC100, PTC1000, thermocouple.
7. The drawer-type switch cabinet monitoring device as claimed in claim 1, wherein the digital signal input and output module comprises a digital signal input terminal, a semaphore acquisition circuit, an isolation device, a third connector, a relay driving circuit, a relay and a digital signal output terminal which are sequentially in communication connection; and the digital signal input and output module is connected with the base meter module through a third connector.
8. The drawer switch cabinet monitoring device of claim 1, wherein the display unit comprises a microprocessor unit, and wherein a real-time clock chip is disposed in the microprocessor unit, and wherein the real-time clock chip is configured to transmit a clock to the base meter module.
9. The drawer-type switchgear monitoring device of claim 1, wherein the display unit interface of the display unit is connected to the micro-processing unit via a third voltage regulator, the third voltage regulator being connected in parallel to the power-on/power-off detection circuit;
the micro-processing unit is connected with the battery module, the battery module is connected with the battery voltage detection module in parallel, the power supply voltage detected by the upper and lower electric detection circuits and the battery voltage detection module is compared, if the power supply voltage detected by the upper and lower electric detection circuits is high, the power is supplied to the micro-processing unit through the third voltage stabilizer, and if the power supply voltage detected by the battery voltage detection module is high, the power is supplied to the micro-processing unit through the battery module.
10. A drawer switchgear cabinet, characterized in that the drawer switchgear cabinet is provided with a drawer switchgear cabinet monitoring device according to any of the claims 1-9;
the drawer type switch cabinet comprises a temperature sensing assembly and a circuit breaker;
the temperature sensing assembly is in communication connection with the circuit breaker and the monitoring device in sequence.
11. The drawer switch cabinet of claim 10, wherein the drawer switch cabinet includes an incoming plug and an outgoing plug, the temperature sensing assembly includes an incoming temperature sensor assembly or an outgoing temperature sensor assembly,
the incoming line plug-in is connected with one end of the monitoring device, the other end of the monitoring device is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the outgoing line temperature sensor assembly, and the other end of the outgoing line temperature sensor assembly is connected with the outgoing line plug-in; or the like, or, alternatively,
the incoming line plug-in is connected with one end of the outgoing line temperature sensor assembly, the other end of the outgoing line temperature sensor assembly is connected with one end of the circuit breaker, the other end of the circuit breaker is connected with one end of the monitoring device, and the other end of the monitoring device is connected with the outgoing line plug-in.
12. A motor protection arrangement, characterized in that it is provided with a withdrawable switchgear monitoring device according to any of claims 1-9, or that it comprises a withdrawable switchgear according to claims 10-11, the monitoring device in the motor protection arrangement being connected to the motor via an ac contactor.
13. The motor protection structure of claim 12, wherein said monitoring device is connected to a circuit breaker, said circuit breaker being connected to a leakage current transformer, said leakage current transformer being connected to said ac contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120677937.8U CN215344084U (en) | 2021-04-01 | 2021-04-01 | Drawer type switch cabinet monitoring device, drawer type switch cabinet and motor protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120677937.8U CN215344084U (en) | 2021-04-01 | 2021-04-01 | Drawer type switch cabinet monitoring device, drawer type switch cabinet and motor protection structure |
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| Publication Number | Publication Date |
|---|---|
| CN215344084U true CN215344084U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120677937.8U Active CN215344084U (en) | 2021-04-01 | 2021-04-01 | Drawer type switch cabinet monitoring device, drawer type switch cabinet and motor protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215344084U (en) |
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2021
- 2021-04-01 CN CN202120677937.8U patent/CN215344084U/en active Active
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