AC / DC hybrid power supply surge protector device with alarm function

Abstract

The utility model discloses an alternating current and direct current hybrid power supply surge protector device with an alarm function. The alternating current and direct current hybrid power supply surge protector device comprises an alternating current surge protector, a direct current surge protector, a current relay and a power supply surge alarm relay, the input end of the alternating-current surge protector is connected with an alternating-current power supply and a zero line, the output end of the alternating-current surge protector is connected with the input end of the current relay, and the output end of the current relay is connected with a ground wire; the current relay is used for enabling the power supply surge alarm relay to act when the current passing through the alternating current surge protector is greater than a preset action value; the input end of the direct-current surge protector is connected with a direct-current power supply anode and a direct-current power supply cathode, the output end of the direct-current surge protector is connected with the input end of the current relay, and the output end of the current relay is connected with a ground wire; the current relay is used for enabling the power supply surge alarm relay to act when the current passing through the DC surge protector is greater than a preset action value, thereby achieving the centralized arrangement, and facilitating the maintenance of operation and maintenance personnel.

Description

Technical Field

[0001] This application relates to the field of lightning protection technology, specifically to an AC / DC hybrid power surge protector device with alarm function. Background Technology

[0002] A surge protector, also known as a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. It is suitable for AC power supply systems with a frequency of 50 Hz or 60 Hz and a rated voltage of 220V to 380V. Surge protectors protect against transient overvoltage surges caused by indirect lightning, direct lightning, or other causes. Specifically, when a sudden spike in current or voltage occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and divert the current in a very short time, thereby preventing damage to other equipment in the circuit and preventing electric shocks caused by energized secondary system equipment.

[0003] Power surge protectors are widely used in the secondary system cabinets of hydropower stations. However, they are all independent AC 380V power supply, AC 220V power supply, and DC 220V power supply circuits. Their distribution is relatively scattered, which makes maintenance inconvenient. Power surge protectors do not have alarm functions after they are activated, and they lack surge counting functions. As a result, maintenance personnel cannot detect power supply abnormalities in time, which is not conducive to improving the level of intelligence of the power station. Utility Model Content

[0004] To address the above issues, this application provides a hybrid AC / DC surge protector with alarm function, which can be connected to both AC and DC power supplies. This effectively enables centralized placement of surge protectors in the secondary cabinets of hydropower stations, making maintenance more convenient for operation and maintenance personnel.

[0005] This utility model is achieved through the following technical solution:

[0006] A hybrid AC / DC power surge protector with alarm function, characterized in that it comprises: an AC surge protector, a DC surge protector, a current relay, and a power surge alarm relay.

[0007] The AC surge protector has an input terminal connected to an AC power source and a neutral wire, and its output terminal is connected to the input terminal of the current relay. The output terminal of the current relay is connected to a ground wire. The current relay is used to activate the power surge alarm relay when the current passing through the AC surge protector exceeds a preset action value.

[0008] The DC surge protector has a DC power supply positive and negative input terminal connected to its input terminal, and a current relay output terminal connected to its input terminal. The current relay output terminal is connected to a ground wire. The current relay is used to activate the power surge alarm relay when the current passing through the DC surge protector exceeds a preset operating value.

[0009] In some embodiments, an AC / DC hybrid power surge protector with alarm function further includes: a reset button;

[0010] The reset button is used to reset the power surge alarm relay.

[0011] In some embodiments, an AC / DC hybrid power surge protector device with alarm function is provided, wherein the AC surge protector includes: an AC 380V surge protector;

[0012] The input terminal of the 380V AC surge protector is connected to a three-phase AC power supply and a neutral wire. The output terminal of the 380V AC surge protector is connected to the first coil of the current relay, and the second coil of the current relay is connected to a ground wire.

[0013] In some embodiments, an AC / DC hybrid power surge protector device with alarm function is provided, wherein the AC surge protector includes: an AC 220V surge protector;

[0014] The input terminal of the AC 220V surge protector is connected to an AC power supply and a neutral wire. The output terminal of the AC 220V surge protector is connected to the first coil of the current relay, and the second coil of the current relay is connected to a ground wire.

[0015] In some embodiments, an AC / DC hybrid power surge protector device with alarm function is provided, wherein the DC surge protector includes: a DC 220V surge protector;

[0016] The input terminal of the 220V DC surge protector is connected to the positive and negative terminals of a DC power supply. The output terminal of the 220V DC surge protector is connected to the first coil of the current relay, and the second coil of the current relay is connected to a ground wire.

[0017] In some embodiments, an AC / DC hybrid power surge protector with alarm function further includes: a monitoring device;

[0018] The monitoring device is used to detect the number of times the power surge alarm relay is activated.

[0019] In some embodiments, the AC surge protector includes an AC 380V surge protector and an AC 220V surge protector, and the DC surge protector includes a DC 220V surge protector, wherein the AC 380V surge protector, the AC 220V surge protector, and the DC 220V surge protector are connected in parallel.

[0020] In some embodiments, the three-phase AC power supply and the neutral wire are L1, L2, L3, and LN, respectively, used to connect to the input terminal of the 380V surge protector. The output terminal of the 380V surge protector is connected to the first coil of the current relays KC1, KC2, KC3, and KC4, respectively, and the second coil of the current relays KC1, KC2, KC3, and KC4 is connected to the ground wire.

[0021] In some embodiments, the AC power supply and the neutral wire are L and N, respectively, used to connect the input terminal of the AC 220V surge protector and the output terminal of the AC 220V surge protector, which are respectively connected to the first coils of the current relays KC5 and KC6, and the second coils of the current relays KC5 and KC6 are connected to the ground wire.

[0022] In some embodiments, the positive and negative terminals of the DC power supply are used to connect to the input terminal of the DC 220V surge protector, the output terminal of the DC 220V surge protector is connected to the first coil of the current relays KC7 and KC8 respectively, and the second coil of the current relays KC7 and KC8 is connected to the ground wire.

[0023] Compared with the prior art, this application has at least the following advantages or beneficial effects:

[0024] This application presents a hybrid AC / DC power surge protector with alarm function, which solves the problem that existing power surge protectors for secondary system cabinets in hydropower stations have independent AC 380V, AC 220V, and DC 220V power circuits, which are scattered and inconvenient to maintain.

[0025] After the surge protector is activated, it has timely alarm and surge counting functions, which send relevant abnormal signals to the operation and maintenance personnel as soon as possible, thereby reducing operating costs and enhancing fault location.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0027] The present application will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0028] Figure 1 This application illustrates an AC / DC hybrid power surge protector device with alarm function according to one embodiment of the present application.

[0029] Figure 2 This application illustrates another AC / DC hybrid power surge protector device with alarm function, as proposed in one embodiment of the present application. Detailed Implementation

[0030] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] In related technologies, surge protectors are widely used in the secondary system cabinets of hydropower stations. However, these circuits consist of independent AC 380V, AC 220V, and DC 220V power supply circuits, which are scattered and inconvenient to maintain. Furthermore, the surge protectors do not have alarm functions after tripping and lack surge counting functions. As a result, maintenance personnel cannot detect power supply abnormalities in a timely manner, which is also not conducive to improving the level of intelligence of the power station.

[0032] To address the aforementioned problems, this application provides an AC / DC hybrid power surge protector with alarm function. This effectively solves the problem of centralized deployment of the device in the secondary cabinets of hydropower stations, making maintenance more convenient for operation and maintenance personnel. After the surge protector activates, it provides timely alarm and surge counting functions, sending relevant abnormal signals to operation and maintenance personnel in a timely manner, thereby reducing operating costs and enhancing fault location capabilities.

[0033] Please see Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of an exemplary AC / DC hybrid power surge protector device with alarm function provided in this application example, wherein... Figure 1 For connection structure, Figure 2 The structure of the alarm section is shown.

[0034] A hybrid AC / DC power surge protector with alarm function is mainly composed of an AC 380V surge protector, an AC 220V surge protector, a DC 220V surge protector, a current relay, a reset button, and a power surge alarm relay.

[0035] The AC 380V surge protector has three-phase AC power and a neutral wire input, connected via L1, L2, L3, and LN. These are used to connect the input and output terminals of the 380V surge protector. The output terminals are connected to the first coils of current relays KC1, KC2, KC3, and KC4, respectively. The second coils of current relays KC1, KC2, KC3, and KC4 are connected to ground. The function of these current relays is to activate when the AC 380V surge protector experiences a current exceeding a certain value. This activates the KC current relays, causing the terminals of current relays KC1, KC2, KC3, and KC4 to conduct, thereby monitoring the AC 380V surge protector's current level. When one or more phases of L2, L3, and LN are broken down, the surge alarm relay KA1 is activated. Since the terminals of surge alarm relay KA1 are connected in parallel with the terminals of current relays KC1, KC2, KC3, and KC4, it achieves a self-holding function. When maintenance personnel press button SB1, surge alarm relay KA1 is reset. Simultaneously, the number of times the terminals of surge alarm relay KA1 have activated can be sent to the monitoring system to monitor the number of surge activations and achieve a counting purpose. Under normal circumstances, if the AC 380V surge protector is not broken down, no current will flow through current relays KC1, KC2, KC3, and KC4.

[0036] The AC 220V surge protector has its input connected to the AC power supply and neutral wire, designated L and N respectively. These are used to connect the input terminals of the AC 220V surge protector. The output terminals of the AC 220V surge protector are connected to the first coils of current relays KC5 and KC6 respectively. The second coils of current relays KC5 and KC6 are connected to the ground wire. The function of these current relays is that when the current through the AC 220V surge protector exceeds a certain value, the KC current relays activate, and the contacts of current relays KC5 and KC6 conduct, thereby monitoring whether the AC 220V surge protector is activated at L and N. When one or two phases are broken down, the surge alarm relay KA2 is activated. Because the terminals of the surge alarm relay KA2 are connected in parallel with the terminals of the current relays KC5 and KC6, it achieves a self-holding function. When the maintenance personnel press the button SB2, the surge alarm relay KA2 is reset. At the same time, the number of times the terminals of the surge alarm relay KA2 are activated can be sent to the monitoring system to monitor the number of surge activations and achieve the purpose of counting. Under normal circumstances, if the AC 220V surge protector is not broken down, no current will flow through the current relays KC5 and KC6.

[0037] The DC 220V surge protector has its input terminals connected to the positive and negative terminals of a DC power supply, designated "+" and "-" respectively. The output terminals are connected to the first coils of current relays KC7 and KC8. The second coils of current relays KC7 and KC8 are connected to ground. The function of these current relays is to activate when the current through the DC 220V surge protector exceeds a certain value. This activates the KC current relay, causing the contacts of current relays KC7 and KC8 to conduct, thereby monitoring whether the DC 220V surge protector is operating at a positive or negative value. When one or both poles of the "-" sign are broken down, the surge alarm relay KA3 is activated. Because the terminals of the surge alarm relay KA3 are connected in parallel with the terminals of the current relays KC7 and KC8, a self-holding function is achieved. When the maintenance personnel press the button SB3, the surge alarm relay KA3 is reset. At the same time, the number of times the terminals of the surge alarm relay KA3 are activated can be sent to the monitoring system to monitor the number of surge activations and achieve the purpose of counting. Under normal circumstances, if the DC 220V surge protector is not broken down, no current will flow through the current relays KC7 and KC8.

[0038] The first and second coils are common components. The relay has pins for the first and second coils, so they are not labeled in the attached diagram.

[0039] In summary, this application provides a hybrid AC / DC power surge protector with alarm function, offering a comprehensive solution that can be connected to AC 380V, AC 220V, and DC 220V power supplies. This effectively addresses the issue of centralized deployment of the power surge protector in secondary control panels of hydropower stations, making maintenance more convenient for operators. The surge protector provides timely alarms and surge counting functions after activation, sending relevant abnormal signals to maintenance personnel immediately, thereby reducing operating costs, enhancing fault location capabilities, and significantly improving the level of automated measurement.

[0040] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An AC / DC hybrid power surge protector device with alarm function, characterized in that, Comprise: AC surge protector, DC surge protector, current relay and power surge alarm relay; Wherein, the AC surge protector input end is connected with AC power and zero line, the AC surge protector output end is connected with the current relay input end, and the current relay output end is connected with ground wire; the current relay is used for power surge alarm relay action when the AC surge protector passing current is greater than preset action value; The DC surge protector input end is connected with DC power positive and DC power negative, the DC surge protector output end is connected with the current relay input end, and the current relay output end is connected with ground wire; the current relay is used for power surge alarm relay action when the DC surge protector passing current is greater than preset action value.

2. The AC / DC hybrid power surge protector device with alarm function according to claim 1, characterized in that, Also comprise: Reset button; The reset button is used for resetting the power surge alarm relay.

3. The AC / DC hybrid power surge protector device with alarm function according to claim 2, characterized in that, The AC surge protector comprises: AC 380V surge protector; The AC 380V surge protector input end is connected with three-phase AC power and zero line, the AC 380V surge protector output end is connected with the first coil of the current relay, and the second coil of the current relay is connected with ground wire.

4. The AC / DC hybrid power surge protector device with alarm function according to claim 2, characterized in that, The AC surge protector comprises: AC 220V surge protector; The AC 220V surge protector input end is connected with AC power and zero line, the AC 220V surge protector output end is connected with the first coil of the current relay, and the second coil of the current relay is connected with ground wire.

5. The AC / DC hybrid power surge protector device with alarm function according to claim 2, characterized in that, The DC surge protector comprises: DC 220V surge protector; The DC 220V surge protector input end is connected with DC power positive and DC power negative, the DC 220V surge protector output end is connected with the first coil of the current relay, and the second coil of the current relay is connected with ground wire.

6. The AC / DC hybrid power surge protector device with alarm function according to claim 1, characterized in that, Also comprise: Monitoring device; The monitoring device is used for detecting the number of times of the power surge alarm relay action.

7. The AC / DC hybrid power surge protector device with alarm function according to claim 3, characterized in that, The AC surge protector comprises: AC 380V surge protector and AC 220V surge protector, the DC surge protector comprises: DC 220V surge protector, and the AC 380V surge protector, AC 220V surge protector and DC 220V surge protector are arranged in parallel.

8. The AC / DC hybrid power surge protector device with alarm function according to claim 3, characterized in that, The three-phase AC power and zero line are respectively L1, L2, L3, LN, which are used for connecting 380V surge protector input end, and the 380V surge protector output end is connected with the first coil of the current relay KC1, KC2, KC3, KC4, respectively, and the second coil of the current relay KC1, KC2, KC3, KC4 is connected with ground wire.

9. The AC / DC hybrid power surge protector device with alarm function according to claim 4, wherein, The AC power and zero line are respectively L, N, which are used for connecting AC 220V surge protector input end and AC 220V surge protector output end, and the first coil of the current relay KC5, KC6 is connected with ground wire, respectively.

10. The AC / DC hybrid power surge protector device with alarm function according to claim 5, wherein, The direct current power supply positive pole and the direct current power supply negative pole are used for connecting the direct current 220V surge protector input end, the direct current 220V surge protector output end is connected with the first coil of the current relay KC7 and KC8 respectively, and the second coil of the current relay KC7 and KC8 is connected with the ground wire.

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