Relay protection device

Abstract

The utility model provides a relay protection device, it includes: casing and power supply board, the power supply board is located casing, the relay protection device still includes: charging port, the one end of charging wire can insert charging port and then connect to power supply board, the other end of charging wire is used for connecting external portable power source. Through being provided with charging port for relay protection device, so as to be able to pass through charging wire and portable power source and supply power for the relay protection device, so do not need to supply power for switchgear to be able to obtain the data in relay protection device.

Description

Technical Field

[0001] This utility model relates to the field of power systems, and in particular to a relay protection device. Background Technology

[0002] Relay protection devices are important equipment in power systems. When a fault occurs in a power component (such as a generator or line) or the power system itself, endangering the safe operation of the power system, the relay protection device can promptly issue a warning signal to the operating personnel or directly issue a trip command to the controlled circuit breaker to stop these events from developing.

[0003] Relay protection devices are typically installed in switchgear and powered by the circuitry within the switchgear. If a fault occurs in the circuit system, the relay protection device triggers a circuit breaker to trip, resulting in a power outage on the current line, and the relay protection device will not be energized. This presents significant challenges in analyzing the data stored in the relay protection device to determine the cause of the circuit system fault. Utility Model Content

[0004] In view of this, the present invention proposes a relay protection device, comprising: a housing and a power supply board, wherein the power supply board is located within the housing, and the relay protection device further comprises:

[0005] The charging port allows one end of the charging cable to be inserted into the charging port and connected to the power supply board, while the other end of the charging cable is used to connect to an external power source.

[0006] By providing a charging port for the relay protection device, it is possible to power the device via a charging cable and a power bank, thus enabling the acquisition of data from the relay protection device without powering the switchgear.

[0007] Optionally, the mobile power supply is at least one of the following devices, according to the relay protection device described above:

[0008] cell phone;

[0009] power bank.

[0010] According to the relay protection device described above, optionally, the charging port is at least one of the following interfaces:

[0011] Type-C interface;

[0012] USB interface;

[0013] Lightning connector.

[0014] Optionally, the charging port is located on the front panel of the housing, as described above, according to the relay protection device. This facilitates operation by the operator.

[0015] Optionally, according to the relay protection device described above, the power supply circuit on the power supply board includes an internal power supply circuit and a connection circuit. The internal power supply circuit can be connected to a fixed power supply, and the connection circuit is connected to the internal power supply circuit. The internal power supply circuit can be connected to the charging cable through the connection circuit.

[0016] Optionally, according to the relay protection device described above, the connection circuit includes:

[0017] A circuit line that connects the charging port to the internal power supply circuit;

[0018] At least one inductor is connected in series with the circuit line.

[0019] Optionally, according to the relay protection device described above, the connection circuit further includes a rectifier diode connected in series on the circuit line and located between the charging port and the internal power supply circuit, with the anode of the rectifier diode facing the charging port. Providing a rectifier diode to this connection circuit prevents the power supplied by the switchgear from being transmitted to the external portable power supply through the internal power supply circuit, thereby avoiding damage to the external portable power supply.

[0020] Optionally, according to the relay protection device described above, the internal power supply circuit includes a filtering region, an electrostatic protection region, a power chip, and an output regulation region, wherein the filtering region is connected to the electrostatic protection region, both the electrostatic protection region and the output regulation region are connected to the power chip, and the electrostatic protection region is connected to the connection circuit.

[0021] Optionally, the internal power supply circuit is a 5V power supply circuit, according to the relay protection device described above. Attached Figure Description

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the connection between a relay protection device and a mobile phone according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the power supply board of a relay protection device according to an embodiment of the present invention.

[0025] The reference numerals in the attached figures are as follows:

[0026] 1-Shell

[0027] 11-Charging port

[0028] 12-Front Panel

[0029] 2-Power Supply Board

[0030] 21-Internal power supply circuit

[0031] 211-Filtering Region

[0032] 2111-First Capacitor

[0033] 212-Electrostatic Protection Area

[0034] 2121 - Second capacitor

[0035] 2122-Second Inductor

[0036] 2123 - Third Capacitor

[0037] 2124 - First Zener Diode

[0038] 213-Power Chip

[0039] 2131 - First Resistor

[0040] 214-Output Adjustment Area

[0041] 2141-Third Inductor

[0042] 2142 - Second Resistor

[0043] 2143 - Third Resistor

[0044] 2144 - Fourth Capacitor

[0045] 2145 - Second Zener Diode

[0046] 2146 - Fifth Capacitor

[0047] 22-Connection Circuit

[0048] 221-Circuit Line

[0049] 222-First Inductor

[0050] 223-Rectifier Diode

[0051] 2-Charging cable

[0052] 3-Mobile Phone

[0053] A-VIN pin

[0054] B-EN pin

[0055] C-GND pin

[0056] D-PG pin

[0057] E-SW pin

[0058] F-FB pin Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this utility model clearer, the following embodiments are provided to further illustrate this utility model in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.

[0060] In existing technology, if a power system fault occurs, the switchgear is de-energized, and the relay protection device is also de-energized. To access the data from the relay protection device, the switchgear needs to be powered on, thus supplying power to the device. This typically involves providing an additional generator, which can be inconvenient for staff.

[0061] The inventor devised a method to supply power to the relay protection device independently. Since the relay protection device generally uses a 5V power supply, it is possible to supply power to the relay protection device without the need for a large power supply equipment.

[0062] like Figure 1 The diagram shown is a structural schematic of the relay protection device according to this utility model. The relay protection device includes a housing 1 and a power supply board 2, with the power supply board 2 located inside the housing 1. The housing 1 includes an operation panel, also known as a front panel 12. After the relay protection device is installed in the switch cabinet, the front panel 12 protrudes from the opening at the top of the switch cabinet, allowing operators to operate the device conveniently.

[0063] The relay protection device also includes a charging port 11. One end of the charging cable 2 can be inserted into the charging port 11 and then connected to the power supply board 2, while the other end of the charging cable 2 is used to connect to an external mobile power source.

[0064] As an example, the power bank can be at least one of the following devices: mobile phone 3, or a power bank. Mobile phone 3 can be any mobile phone 3 with reverse charging functionality; there is no limitation on this. It can also be any power bank.

[0065] As an example, the charging port 11 can be at least one of the following interfaces: Type-C, USB, or Lightning. To improve the adaptability of the relay protection device, it can also have two or three of these interfaces simultaneously. To ensure that charging is only performed through one charging port 11 at a time, a baffle can be installed to ensure that only one charging port 11 is exposed when multiple charging ports 11 are present, or a button selection can be used to determine that only one charging port 11 is operational. There are various implementation methods, which will not be elaborated here. Of course, there can also be only one charging port 11. If the charging cable 2 has a different interface, an adapter cable can be used for connection. For example, such as... Figure 1As shown, the charging port 11 is a commonly used Type-C interface. This charging port 11 can be located on the front panel 12 of the housing 1, making it convenient for staff to insert the charging cable 2.

[0066] The relay protection device requires a relatively low power supply voltage, such as 5V, so a small portable power supply can be used.

[0067] According to this utility model, by providing a charging port 11 for the relay protection device, the relay protection device can be powered by a charging cable 2 and a mobile power supply, so that the data in the relay protection device can be obtained without powering the switch cabinet.

[0068] As an example, such as Figure 2 As shown, the power supply circuit on the power supply board 2 includes an internal power supply circuit 21 and a connection circuit 22. The internal power supply circuit 21 can be connected to a fixed power supply, and the connection circuit 22 is connected to the internal power supply circuit 21. The internal power supply circuit 21 can be connected to the charging cable 2 via the connection circuit 22. The internal power supply circuit 21 can be a circuit in a relay protection device used to obtain power from the switch cabinet. The connection circuit 22 is used to enable the internal power supply circuit 21 to obtain power from the mobile power supply.

[0069] As an example, the connection circuit 22 includes a circuit line 221 and at least one first inductor 222. The circuit line 221 is connected between the charging port 11 and the internal power supply circuit 21. The first inductor 222 is connected in series with the circuit line 221. Figure 2 The diagram shows two first inductors 222, whose function is to prevent static electricity. The specific number can be set according to actual needs. The values ​​of each first inductor 222 can be different, and can be selected according to actual needs.

[0070] As an example, the connection circuit 22 also includes a rectifier diode 223, which is connected in series with the circuit line 221 and located between the charging port 11 and the internal power supply circuit 21, with the anode of the rectifier diode 223 facing the charging port 11. In one scenario, the internal power supply circuit 21 receives power from both an external power bank and a switch cabinet. By providing the rectifier diode 223 to the connection circuit 22, the power supplied by the switch cabinet can be prevented from being transmitted to the external power bank through the internal power supply circuit 21, thus avoiding damage to the external power bank.

[0071] As an example, such as Figure 2As shown, the internal power supply circuit 21 includes: a filtering region 211, an electrostatic discharge (ESD) protection region 212, a power chip 213, and an output regulation region 214. The filtering region 211 is connected to the ESD protection region 212. Both the ESD protection region 212 and the output regulation region 214 are connected to the power chip 213. The ESD protection region 212 is connected to the connection circuit 22. For example, the power chip 213 has a VIN pin A, an EN pin B, a GND pin C, a PG pin D, a SW pin E, and an FB pin F. The filtering region 211 includes several parallel first capacitors 2111. One end of each first capacitor 2111 is grounded, and the other end is connected to the ESD protection region 212, for example, connected to the VIN pin A through the ESD protection region 212. Figure 2 The diagram shows four capacitors connected in parallel. The electrostatic discharge (ESD) protection area 212 includes two second capacitors 2121, a second inductor 2122, a third capacitor 2123, and a first Zener diode 2124 connected in parallel. One end of the second capacitor 2121, one end of the second inductor 2122, one end of the third capacitor 2123, and one end of the first Zener diode 2124 are connected together, and this end of the second capacitor 2121 is also connected to the connection circuit 22. The other ends of the second capacitor 2121, the third capacitor 2123, and the first Zener diode 2124 are all connected to the GND pin C. The other end of the second inductor 2122 is connected to the VIN pin A. Furthermore, for the power supply chip 213, a DNP (Do Not Populate) first resistor 2131 can be placed between the EN pin B and the PG pin D for detection purposes. The output regulation region 214 includes a third inductor 2141, a resistor circuit, a third resistor 2143, a second Zener diode 2145, and several fourth capacitors 2144 connected in parallel. The resistor circuit includes several second resistors 2142 connected in series, such as... Figure 2 As shown, there are two second resistors 2142. One end of the third inductor 2141 is connected to the SW pin E. One end of the resistor line, one end of the second Zener diode 2145, and one end of each of the fourth capacitors 2144 connected in parallel are all connected to the other end of the third inductor 2141. The other end of the resistor line is connected to the FB pin F. One end of the third resistor 2143 is connected to the FB pin F. The other ends of the third resistor 2143, the second Zener diode 2145, and each of the fourth capacitors 2144 connected in parallel are all grounded. The output regulation region 214 may also include a DNP fifth capacitor 2146, one end of which is connected between the third inductor 2141 and the resistor line, and the other end is connected to the FB pin F.

[0072] Although resistors, capacitors, or Zener diodes are represented by the same reference numerals, their values ​​can be set to be the same or different depending on the actual needs.

[0073] The power supply chip 213 here can be a DC-DC (Direct Current-Direct Current Converter) chip.

[0074] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Relay protection devices, including: The device comprises a housing (1) and a power supply board (2), wherein the power supply board (2) is located within the housing (1), characterized in that the relay protection device further comprises: The charging port (11) allows one end of the charging cable to be inserted into the charging port (11) and connected to the power supply board (2). The other end of the charging cable is used to connect to an external mobile power source.

2. The relay protection device according to claim 1, wherein the mobile power supply is at least one of the following devices: Mobile phone (3); power bank.

3. The relay protection device according to claim 1, characterized in that, The charging port (11) is at least one of the following interfaces: Type-C interface; USB interface; Lightning connector.

4. The relay protection device according to claim 1, characterized in that, The charging port (11) is located on the front panel (12) of the housing (1).

5. The relay protection device according to any one of claims 1-4, characterized in that, The power supply circuit on the power supply board (2) includes an internal power supply circuit (21) and a connection circuit (22). The internal power supply circuit (21) can be connected to a fixed power supply, and the connection circuit (22) is connected to the internal power supply circuit (21). The internal power supply circuit (21) can be connected to the charging cable through the connection circuit (22).

6. The relay protection device according to claim 5, characterized in that, The connection circuit (22) includes: A circuit line (221) is connected between the charging port (11) and the internal power supply circuit (21); At least one first inductor (222) is connected in series with the circuit line (221).

7. The relay protection device according to claim 6, characterized in that, The connection circuit (22) also includes: A rectifier diode (223) is connected in series with the circuit line (221) and located between the charging port (11) and the internal power supply circuit (21), with the anode of the rectifier diode (223) facing the charging port (11).

8. The relay protection device according to claim 5, characterized in that, The internal power supply circuit (21) includes a filtering area (211), an electrostatic protection area (212), a power chip (213), and an output adjustment area (214). The filtering area (211) is connected to the electrostatic protection area (212), and both the electrostatic protection area (212) and the output adjustment area (214) are connected to the power chip (213). The electrostatic protection area (212) is connected to the connection circuit (22).

9. The relay protection device according to any one of claims 1-8, characterized in that, The internal power supply circuit (21) is a 5V power supply circuit.

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