CN217543296U - Switch cabinet monitoring device and switch cabinet with same - Google Patents
Switch cabinet monitoring device and switch cabinet with same Download PDFInfo
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- CN217543296U CN217543296U CN202221179893.7U CN202221179893U CN217543296U CN 217543296 U CN217543296 U CN 217543296U CN 202221179893 U CN202221179893 U CN 202221179893U CN 217543296 U CN217543296 U CN 217543296U
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Abstract
The application discloses cubical switchboard monitoring devices and have this monitoring devices's cubical switchboard. The switch cabinet monitoring device is used in cooperation with a charged sensor in a switch cabinet; the surface of the monitoring device is provided with an electricity testing nuclear phase unit, and the monitoring device is internally provided with a partial discharge sampling unit and a control unit; the charged sensor is connected with the inner side of the electricity-checking nuclear phase unit, and an electricity-checking nuclear phase hole communicated with the charged sensor is reserved on the outer side of the electricity-checking nuclear phase unit; the electrified sensor is connected with the partial discharge sampling unit, the partial discharge sampling unit collects pulse current signals in three-phase power and transmits the pulse current signals to the control unit, and the control unit calculates a partial discharge value according to the pulse current signals. This application is with the monitoring of cubical switchboard and demonstration, the outside of safety get the electric demand integration in cubical switchboard monitoring device of an organic whole to need to install a plurality of independent monitoring devices in order to satisfy the not enough and the not enough problem of electric security is got to the cubical switchboard of opening in order to overcome prior art.
Description
Technical Field
The application relates to the technical field of power switch equipment, in particular to a switch cabinet monitoring device and a switch cabinet with the same.
Background
The discharge that occurs only in a local area in the insulator, and does not penetrate between the conductors to which the voltage is applied, may occur in the vicinity of the conductors or elsewhere, and this phenomenon is called a partial discharge. Electrical equipment insulates discharges occurring in a local range under the action of a sufficiently strong electric field, which discharges are limited to causing only insulating local shorts (bridges) between conductors without the formation of conductive paths. Each time, the local discharge has some influence on an insulating medium, the slight local discharge has small influence on the insulation of power equipment, and the reduction of the insulation strength is slow; and strong partial discharge causes a rapid decrease in the dielectric strength. This is an important factor in the insulation damage of high-voltage switch cabinets. Therefore, the high-voltage switch cabinet in operation needs to be monitored intensively, and when partial discharge exceeds a certain degree, the equipment is required to be withdrawn from operation for maintenance or replacement. Besides, the temperature in the cabinet also needs to be known in real time, when the cabinet is operated at the periphery of the cabinet, the cabinet door is often required to be opened, electricity is taken in the cabinet, the operation has certain danger, and safety accidents caused by the operation are endless. At present, most products related to high-voltage switch cabinet monitoring or related operation in the market are independent and distributed, and products capable of integrating various requirements are lacked.
Disclosure of Invention
An object of this application provides one kind can get the electric demand integration in cubical switchboard monitoring devices of an organic whole with the monitoring of cubical switchboard and demonstration, safe outside to need to install a plurality of independent monitoring devices in order to satisfy the not enough and the not enough problem of the electric security of getting of cubical switchboard in overcoming prior art.
The utility model discloses a realize through following technical measure: the application discloses a switch cabinet monitoring device which is used in cooperation with a charged sensor in a switch cabinet; the surface of the monitoring device is provided with an electricity testing nuclear phase unit, and the monitoring device is internally provided with a partial discharge sampling unit and a control unit; the charged sensor is connected with the inner side of the electricity-testing nuclear phase unit, and an electricity-testing nuclear phase hole communicated with the charged sensor is reserved on the outer side of the electricity-testing nuclear phase unit; the electrified sensor is connected with the partial discharge sampling unit, the partial discharge sampling unit collects pulse current signals in three-phase power and transmits the pulse current signals to the control unit, and the control unit calculates a partial discharge value according to the pulse current signals.
Preferably, the device further comprises a display unit, the display unit is connected with the control unit, and the partial discharge value is displayed on the display unit.
Preferably, the control unit is connected with the temperature acquisition unit, receives the temperature signal in the cabinet and displays the temperature signal on the display unit.
Preferably, the control unit transmits the partial discharge value to a remote terminal in a wired or wireless manner.
Preferably, the surface of the monitoring device is provided with a USB interface for data transmission, and the USB interface is connected with a serial port of the control unit.
Preferably, a three-phase electrification indicating lamp for indicating a three-phase electrification state is arranged on the surface of the monitoring device.
Preferably, the device further comprises a power supply module, wherein the power supply module converts alternating current into a direct current 12V power supply, converts the 12V power supply into 5V and 3.3V power supplies, and supplies power to power utilization units in the device.
The application also discloses a switch cabinet with the monitoring device, which is suitable for the monitoring device, wherein a charged sensor and a temperature sensor are arranged in a cabinet body, and the charged sensor is sequentially connected with a partial discharge sampling unit and a control unit of the monitoring device; the charged sensor is also connected with an electricity checking nuclear phase unit; the temperature sensor is connected with the temperature acquisition unit and the control unit of the monitoring device in sequence; the control unit of the monitoring device is also connected with a door lock control circuit of the cabinet body, and when the switch cabinet is detected to be electrified, the door lock is in a locking state.
Preferably, the temperature sensor is wirelessly connected with a temperature acquisition unit of the monitoring device.
Preferably, the monitoring device is provided with a door lock state indicating lamp for displaying the state of the door lock.
The beneficial effect of this application: the monitoring and displaying of the switch cabinet and the safe external power taking requirement are integrated into a whole, a display unit and an electricity testing and phase checking unit are respectively arranged on the same monitoring device, the display unit is used for displaying the partial discharge value and the temperature in the switch cabinet, the electricity testing and phase checking unit is used for checking the phase of the three-phase power led out from the switch cabinet on one hand and indicating the phase checking result in the form of an indicator lamp on the other hand, and electricity testing and phase checking holes are reserved outside the switch cabinet on the other hand so as to meet the safe power taking requirement during the operation around the switch cabinet; the surface of the device is also provided with a USB interface, detection data (partial discharge value and/or temperature value) are transmitted through the USB interface, and the control unit can also realize the transmission of the detection data through other wireless or limited modes, such as Bluetooth transmission, RS485 transmission and the like.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the application and together with the description serve to explain the application and not limit the application.
In the drawings:
fig. 1 is a perspective view of a monitoring device.
Fig. 2 is a panel view of the upper case of fig. 1.
Fig. 3 is a control circuit of the monitoring device.
FIG. 4 is a USB interface connection diagram of the monitoring device.
Fig. 5 is a schematic diagram of the door lock control of the switch cabinet.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The first embodiment is as follows:
a switch cabinet monitoring device is used in cooperation with a charged sensor in a switch cabinet. The charged sensor can be used as a part of the monitoring device, and can also be used as a part independently arranged in the cabinet body to be matched with the monitoring device.
As shown in fig. 1 to 5, the monitoring device includes an upper casing 100 and a lower casing 200 connected to each other, and a display unit 110, an electricity-checking and phase-checking unit 140, an indicating unit 130, and a self-checking button 120 are provided on a surface of the upper casing. The lower shell is internally provided with a control unit 101, a partial discharge sampling unit 102, a temperature acquisition unit 103 and a three-phase electrification indicating unit 104, and the bottom surface of the lower shell is provided with a wiring terminal row for connecting each unit in the shell, a shell outer electrification sensor 310 and a temperature sensor 320.
Specifically, the charged sensor is connected to a connecting terminal A, B, C, on one hand, a connecting terminal A, B, C is connected with the inner side of the electricity-testing and phase-checking unit, an electricity-testing and phase-checking hole 142 communicated with the charged sensor is reserved on the outer side of the electricity-testing and phase-checking unit, and three-phase charged indicator lamps 141 are correspondingly arranged above the three electricity-testing and phase-checking holes. When the cabinet needs temporary power utilization outside, the cabinet door does not need to be opened, and the three-phase power can be acquired by connecting the power testing and phase checking holes.
In a second aspect, the connecting terminal A, B, C is connected with the three-phase electrified indicating lamp through the three-phase electrified indicating unit and used for indicating the state of three-phase electricity, and the three-phase electrified indicating unit converts the voltage of the electrified sensor into the voltage suitable for the three-phase electrified indicating lamp.
In a third aspect, the terminal A, B, C is connected to the local discharge sampling unit 102, when the cabinet body has partial discharge, the corresponding pulse current signal appears in the three-phase power, the pulse current signal in the three-phase power is monitored by the local discharge sampling unit, the pulse current signal is converted into a voltage signal which can be processed by the control unit and transmitted to the control unit, the control unit calculates a local discharge value according to the pulse current signal, and the local discharge value is displayed on the display unit 110 or transmitted to the outside in a wired or wireless manner. It should be noted that the pulse current method is one of the earlier studied partial discharge detection methods, and it is a detection method widely used in on-line and off-line monitoring, in which a signal is measured from a neutral point or a ground point of an electric power device through a rogowski coil, or a signal is measured through a detection impedance on a coupling capacitor side.
The temperature sensor 320 in the cabinet is connected with the control unit 101 through the temperature acquisition unit 103, and the control unit receives the temperature signal in the cabinet and displays the temperature signal on the display unit. The temperature sensor and the control unit can be connected in a wireless communication mode or in a wired connection mode.
The indicating unit of the upper case surface includes: power indicator, operation indicator, warning indicator and lock status indicator. The power indicator light, the operation indicator light, the alarm indicator light and the door lock state indicator light are all connected with the corresponding terminals of the control unit and used for indicating various states of the cabinet body.
The self-checking button on the surface of the upper shell is used for detecting whether the three-phase electrified indicating lamp works normally or not. Specifically, the self-checking button is connected with the three-phase electrified indicating lamp and the test power supply in series, when the test power supply is electrified, whether the three-phase electrified indicating lamp works normally is detected by controlling the self-checking button, and the self-checking button is generally used for detecting equipment before being used.
The monitoring device adopts an active power supply mode and comprises a power supply module, wherein the power supply module converts alternating current into a direct current 12V power supply and then converts the 12V power supply into 5V and 3.3V power supplies. Specifically, the power supply module includes: 1. inputting alternating current; 2. the ACDC conversion module is used for converting AC to DC; 3. a DCDC12V power management circuit; 4. converting 12V into 5V power supply management; 5. converting 12V into 3.3V power supply management; 6. an external synchronizing circuit. Alternating current is accessed through a power supply terminal and is converted into a direct current 12V power supply through an AC-DC alternating current to direct current module, an external synchronous circuit collects alternating sine waves and converts the alternating sine waves into square wave signals to provide zero point judgment for a control unit, namely an MCU (microprogrammed control unit), and meanwhile, the 12V power supply is converted into 5V and 3.3V through a DCDC circuit to provide stable power supplies for other power utilization units.
The surface of the upper shell is provided with a USB interface 150 which is connected with the control unit so as to read the detection data of the control unit in a wired mode. It should be noted that the existing wired or wireless transmission modes are various, such as bluetooth transmission, RS485 transmission, and the like, for example, the control unit may transmit the signals in the cabinet to the external terminal through the communication module, and the communication module may be one or more of a 433Mhz wireless module +433 antenna, a 2.4G wireless communication module +2.4G antenna, and a 470Mhz wireless module +470M antenna. The control unit sends the calculated data to the wireless module through a fixed message format and a TTL level, and then the data is transmitted to an external terminal through a corresponding antenna, so that wireless communication is achieved. The signal transmission mode is not limited in the present application, and similar products or structures using other transmission modes are also included in the protection scope of the present application.
Example two:
the switch cabinet with the monitoring device is characterized in that a charged sensor and a temperature sensor are arranged in the cabinet body, and the charged sensor is sequentially connected with a partial discharge sampling unit and a control unit of the monitoring device; the charged sensor is also connected with the electricity checking and nuclear phase unit, and the temperature sensor is sequentially connected with the temperature acquisition unit and the control unit of the monitoring device.
Monitoring devices's the control unit still with the lock control circuit connection of the cabinet body, when detecting that the cubical switchboard is electrified for the lock is in the locking state, opens the cabinet door in order to prevent someone, is equipped with the lock state pilot lamp that is used for showing the lock state on the monitoring devices. Specifically, a relay is connected in series in front of the door lock control circuit, and the control unit controls the on-off of the door lock control circuit by controlling the on-off of the relay. When the electrified sensor detects that the cabinet body is electrified, the control circuit controls the relay to be disconnected, the door lock control circuit is also disconnected, and the door lock is in a locking state.
The self-checking button on the surface of the upper shell can also be used for detecting whether the relay works normally, and the principle is similar to the detection mode of a three-phase electrified indicating lamp.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A switch cabinet monitoring device is characterized by being used in cooperation with a charged sensor in a switch cabinet; the surface of the monitoring device is provided with an electricity testing nuclear phase unit, a partial discharge sampling unit and a control unit are arranged in the monitoring device; the charged sensor is connected with the inner side of the electricity-checking nuclear phase unit, and an electricity-checking nuclear phase hole communicated with the charged sensor is reserved on the outer side of the electricity-checking nuclear phase unit; the charged sensor is connected with the partial discharge sampling unit, the partial discharge sampling unit collects pulse current signals in three-phase power and transmits the pulse current signals to the control unit, and the control unit calculates a partial discharge value according to the pulse current signals.
2. The switchgear monitoring device according to claim 1, further comprising a display unit, wherein the display unit is connected to the control unit, and the partial discharge value is displayed on the display unit.
3. The switch cabinet monitoring device according to claim 2, wherein the control unit is connected with the temperature acquisition unit, receives the temperature signal in the cabinet and displays the temperature signal on the display unit.
4. The switchgear monitoring device according to claim 1, wherein the control unit transmits the partial discharge value to a remote terminal by wire or wirelessly.
5. The switch cabinet monitoring device according to claim 1, wherein a USB interface for data transmission is arranged on the surface of the monitoring device, and the USB interface is connected with a serial port of the control unit.
6. The switch cabinet monitoring device according to claim 1, wherein the surface of the monitoring device is provided with a three-phase electrification indicating lamp for indicating a three-phase electrification state.
7. The switchgear monitoring device according to claim 1, further comprising a power module, wherein the power module converts ac power to dc12V power, and then converts the 12V power to 5V and 3.3V to supply power to power consuming units in the device.
8. The switch cabinet with the monitoring device is applicable to the monitoring device of any one of claims 1 to 7, and is characterized in that a charged sensor and a temperature sensor are arranged in the cabinet body, and the charged sensor is sequentially connected with a partial discharge sampling unit and a control unit of the monitoring device; the charged sensor is also connected with an electroscopy phase unit; the temperature sensor is connected with the temperature acquisition unit and the control unit of the monitoring device in sequence;
the control unit of the monitoring device is also connected with a door lock control circuit of the cabinet body, and when the switch cabinet is detected to be electrified, the door lock is in a locking state.
9. The switch cabinet with the monitoring device according to claim 8, wherein the temperature sensor is wirelessly connected with the temperature acquisition unit of the monitoring device.
10. The switch cabinet with the monitoring device according to claim 8, wherein the monitoring device is provided with a door lock state indicator lamp for displaying the door lock state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221179893.7U CN217543296U (en) | 2022-05-17 | 2022-05-17 | Switch cabinet monitoring device and switch cabinet with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221179893.7U CN217543296U (en) | 2022-05-17 | 2022-05-17 | Switch cabinet monitoring device and switch cabinet with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217543296U true CN217543296U (en) | 2022-10-04 |
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ID=83435937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221179893.7U Active CN217543296U (en) | 2022-05-17 | 2022-05-17 | Switch cabinet monitoring device and switch cabinet with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217543296U (en) |
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2022
- 2022-05-17 CN CN202221179893.7U patent/CN217543296U/en active Active
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