An anti-inrush device and power supply system
By using series normally open contacts and an independent controller to detect power fluctuations, the problem of high cost of energy storage power supply anti-power fluctuation devices is solved, and the stability and reliability of electrical power supply during power grid fluctuations are achieved, thereby reducing equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHENG ENG
- Filing Date
- 2025-05-26
- Publication Date
- 2026-07-14
Smart Images
Figure CN224502966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical technology, and in particular to an anti-sloshing device and a power supply system. Background Technology
[0002] In continuous production enterprises such as petrochemical or metallurgical plants, when power supply voltage drops or momentary losses occur due to short-circuit faults, momentary power grid fluctuations, dual-power supply switching, automatic transfer switch operation, or reclosing, the contactors in the motor circuits may release, causing unplanned production shutdowns, resulting in significant economic losses and safety hazards. To address these issues, existing technologies can incorporate energy storage power supply devices such as batteries or supercapacitors to counteract grid power supply during system voltage drops or losses.
[0003] However, the initial investment and operation and maintenance costs of energy storage power anti-power fluctuation devices are very high, and the devices themselves require a certain area, which further increases the investment cost. Utility Model Content
[0004] The purpose of this invention is to provide an anti-sloshing device and power supply system to at least partially solve the above-mentioned problems of the prior art.
[0005] To achieve the above objectives, this utility model provides an anti-power fluctuation device applied to the start-stop control circuit of an electrical power supply system. The start-stop control circuit controls the opening and closing of the power supply switch of the electrical appliance. The start-stop control circuit includes a contactor, which includes a contactor coil, a main contact serving as the power supply switch, and a zeroth normally open contact. When the zeroth normally open contact is closed, the contactor coil is energized, the main contact is closed, and the electrical appliance is energized. When the zeroth normally open contact is opened, the contactor coil is de-energized, the main contact is opened, and the electrical appliance is de-energized. The anti-power fluctuation device includes:
[0006] The first normally open contact and the second normally open contact are connected in series and then connected in parallel across the two ends of the zeroth normally open contact;
[0007] The first anti-sloshing controller is used to detect whether the zeroth normally open contact experiences a sloshing, and when a sloshing is detected, it controls the first normally open contact to close.
[0008] The second anti-slip controller is used to detect whether the zeroth normally open contact experiences slippage, and when slippage is detected, controls the second normally open contact to close.
[0009] Preferably, the anti-sloshing device further includes:
[0010] The first two normally open contacts and the second two normally open contacts are respectively connected to the online monitoring cabinet for anti-sloshing equipment;
[0011] The first anti-power fluctuation controller is also used to control the first two normally open contacts to close when a power fluctuation is detected.
[0012] The second anti-power fluctuation controller is also used to control the closure of the second normally open contact when a power fluctuation is detected;
[0013] The online monitoring cabinet for anti-sloshing equipment is used to issue a reminder signal when the first two normally open contacts are closed and / or the second two normally open contacts are closed.
[0014] Preferably, the anti-sloshing equipment online monitoring cabinet includes an online monitoring circuit, which includes a first circuit, a second circuit, and a third circuit connected in parallel. The first circuit includes a coil of a first relay and a first normally open contact connected in series. The second circuit includes a normally closed contact of the first relay and a first indicator light. The third circuit includes a normally open contact of the first relay and a second indicator light.
[0015] Preferably, the anti-sway equipment online monitoring cabinet includes an online monitoring circuit, which includes a first circuit, a second circuit, and a third circuit connected in parallel; in the first circuit, the first two normally open contacts and the second two normally open contacts are connected in parallel and then connected in series with the coil of the first relay; the second circuit includes the normally closed contact of the first relay and a first indicator light; the third circuit includes the normally open contact of the first relay and a second indicator light.
[0016] Preferably, when the second indicator light is constantly on, it indicates a fault in the anti-shake device.
[0017] Preferably, it also includes a communication screen connected to the online monitoring cabinet for anti-sway equipment. When the second indicator light is constantly on, the online monitoring cabinet for anti-sway equipment sends a notification signal to the communication screen.
[0018] The communication screen is used to send a fault alarm signal to the control room according to a preset path after receiving the notification signal.
[0019] Preferably, it further includes a remote control system DCS circuit, the DCS circuit including a second normally open contact of the contactor connected in series with the DCS controller, and a first third normally open contact and a second third normally open contact connected in series with the second normally open contact; the first anti-power fluctuation controller is further configured to control the first third normally open contact to close when a power fluctuation is detected; the second anti-power fluctuation controller is further configured to control the second third normally open contact to close when a power fluctuation is detected.
[0020] Preferably, the first anti-power fluctuation controller includes a first power fluctuation identification chip, and the second anti-power fluctuation controller includes a second power fluctuation identification chip. The first power fluctuation identification chip and the second power fluctuation identification chip are used to detect whether the zeroth normally open contact experiences power fluctuation, respectively.
[0021] In another aspect, this utility model provides a power supply system, including a power supply circuit for an electrical appliance and a start-stop control circuit. The start-stop control circuit is used to control the opening and closing of the power supply switch of the electrical appliance in the power supply circuit. The start-stop control circuit includes a contactor, which includes a contactor coil, a main contact serving as the power supply switch, and a zeroth normally open contact. When the zeroth normally open contact is closed, the contactor coil is energized, the main contact is closed, and the electrical appliance is energized. When the zeroth normally open contact is opened, the contactor coil is de-energized, the main contact is opened, and the electrical appliance is de-energized. The start-stop control circuit includes the anti-power-dampening device provided in the above aspect.
[0022] Preferably, the start-stop control circuit further includes: a manual start-stop circuit and a DCS start-stop circuit.
[0023] Compared with the prior art, the present invention has at least the following advantages:
[0024] By employing the anti-power fluctuation device provided in this embodiment, two independent anti-power fluctuation controllers are used to detect the occurrence of power fluctuations, and then the normally open contacts are closed to achieve the anti-power fluctuation function. This eliminates the need for an energy storage power supply-type anti-power fluctuation device, reducing equipment costs. Furthermore, with two independent anti-power fluctuation controllers, the probability of both controllers failing simultaneously is almost zero. Therefore, it is impossible for both normally open contacts to close at the same time, resulting in high robustness and reliability. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the electrical power supply system provided in an embodiment of the present utility model.
[0026] Figure 2 This is a schematic diagram of the structure of the online monitoring cabinet for anti-sloshing equipment provided in an embodiment of this utility model.
[0027] Figure 3 Another structural schematic diagram of the online monitoring cabinet for anti-sloshing equipment provided in this embodiment of the utility model.
[0028] Figure 4 This is a schematic diagram of the anti-sloshing device provided in an embodiment of the present invention. Detailed Implementation
[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate to understand the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a product or device comprising a series of units is not necessarily limited to those explicitly listed, but may include other units not explicitly listed or inherent to such product or device.
[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0035] Example 1
[0036] This embodiment provides an anti-power fluctuation device applied to the start-stop control circuit of an electrical power supply system. The start-stop control circuit is used to control the opening and closing of the power supply switch of the electrical appliance.
[0037] Figure 1 A schematic diagram of an electrical power supply system is shown. (Reference) Figure 1 As shown, the start / stop control circuit includes a contactor, which includes a contactor coil 10, a main contact 100 serving as the power supply switch, and a zeroth normally open contact 101. When the zeroth normally open contact 101 is closed, the contactor coil 10 is energized, the main contact 100 is closed, and the electrical appliance is energized. When the zeroth normally open contact 101 is open, the contactor coil 10 is de-energized, the main contact 100 is open, and the electrical appliance is de-energized.
[0038] The anti-sloshing device includes:
[0039] The first normally open contact 111 and the second normally open contact 121, which are connected in series, are connected in parallel across the two ends of the zeroth normally open contact 101;
[0040] The first anti-slip controller is used to detect whether the zeroth normally open contact 101 experiences a slip, and when a slip is detected, controls the first normally open contact 111 to close.
[0041] The second anti-slip controller is used to detect whether the first normally open contact 101 experiences a slippage, and when a slippage is detected, it controls the second normally open contact 121 to close.
[0042] With the anti-voltage fluctuation device provided in this embodiment, when a voltage fluctuation occurs, the normally open contacts 111 and 121 close, so that the contactor coil circuit continues to be energized, thereby ensuring the normal operation of the electrical appliance.
[0043] In one implementation, reference Figure 1 As shown, the anti-power fluctuation device provided in this embodiment may further include:
[0044] The first two normally open contacts 112 and the second two normally open contacts 122 are respectively connected to the online monitoring cabinet for anti-sloshing equipment;
[0045] The first anti-slip controller is also used to control the first two normally open contacts 112 to close when a slip occurs;
[0046] The second anti-power fluctuation controller is also used to control the second normally open contact 122 to close when a power fluctuation is detected.
[0047] The anti-sloshing equipment online monitoring cabinet is used to issue an alert signal when the first two normally open contacts 112 are closed and / or the second two normally open contacts 122 are closed.
[0048] In one implementation, reference Figure 2 The diagram shows the structure of an online monitoring cabinet for anti-sloshing equipment. The online monitoring cabinet includes an online monitoring circuit, which comprises a first circuit, a second circuit, and a third circuit connected in parallel. In the first circuit, the first two normally open contacts 112 and the second two normally open contacts 122 are connected in parallel and then connected in series with the coil KA1 of the first relay. The second circuit includes the normally closed contact KA11 of the first relay and a first indicator light HG1. The third circuit includes the normally open contact KA12 of the first relay and a second indicator light HR1. Figure 2 As shown, the online monitoring cabinet for anti-sway equipment can monitor multiple anti-sway devices simultaneously. Figure 2 KHD21 and KHD22 are another type of anti-power fluctuation device, which is used in conjunction with indicator lights HG2 and HR2, relay coil KA2 and its contacts KA21 and KA22.
[0049] For example, HG1 is a green indicator light and HR1 is a red indicator light. The indicator lights are all installed on the front of the monitoring cabinet. (1) When the grid voltage is normal, the anti-surge device does not operate. Contacts 112 and 122 are both open. The contacts of KA1 remain in their initial state. At this time, the HG1 circuit is connected and the HR1 circuit is disconnected. HG1 lights up, that is, the green indicator light is on, indicating that the grid voltage is normal at this time. (2) When the grid experiences a power fluctuation, the anti-surge device operates. Contacts 112 and 122 are both closed. The normally open contacts of KA1 are closed and the normally closed contacts are open. At this time, the HG1 circuit is disconnected and the HR1 circuit is connected. HR1 lights up, that is, the red indicator light is on. However, the power fluctuation time is very short. After the power fluctuation is completed, the grid voltage immediately returns to normal. At this time, the circuit returns to its initial state, that is, the green light is on and the red light is off. If someone observes the above state, that is, the red light briefly lights up and then goes out, it indicates that a power fluctuation has occurred. (3) When a controller of the anti-sloshing equipment malfunctions, the contacts controlled by that controller will activate, i.e., contacts 112 or 122 will change to a closed state, the normally open contacts of KA1 will close, and the normally closed contacts will open. At this time, the HG1 circuit will be disconnected, the HR1 circuit will be connected, and HR1 will light up, i.e., the red indicator light will be on. Unlike (2), when the anti-sloshing equipment malfunctions, it usually cannot recover on its own. Therefore, the red indicator light will remain on, while the green light will remain off. If the observer finds that the red indicator light is on, they can know that the anti-sloshing equipment has malfunctioned.
[0050] In another implementation, refer to Figure 3 The diagram shows the structure of an online monitoring cabinet for anti-sloshing equipment. The online monitoring cabinet includes an online monitoring circuit, which comprises a first circuit, a second circuit, and a third circuit connected in parallel. The first circuit includes a coil KA1 of a first relay and a first normally open contact 112 connected in series. The second circuit includes a normally closed contact KA11 of the first relay and a first indicator light HG1. The third circuit includes a normally open contact KA12 of the first relay and a second indicator light HR1. (Reference) Figure 3 As shown, the online monitoring circuit includes a fourth circuit, a fifth circuit, and a sixth circuit connected in parallel. The fourth circuit includes the coil KA2 of the second relay and the second normally open contact 122 connected in series. The fifth circuit includes the normally closed contact KA21 of the second relay and the third indicator light HG2. The sixth circuit includes the normally open contact KA22 of the second relay and the fourth indicator light HR2. Figure 3 The online monitoring cabinet for anti-sloshing equipment shown can also monitor multiple anti-sloshing devices simultaneously, that is, two sets of four indicator lights are used to monitor one anti-sloshing device.
[0051] At this time, the online monitoring cabinet for anti-sway equipment can also issue a fault indication by having a constantly lit red light, and... Figure 2 The difference is that since each red light corresponds to an anti-sloshing controller, it is possible to directly identify which anti-sloshing controller has malfunctioned.
[0052] In one embodiment, the anti-sloshing equipment also includes a communication screen connected to the online monitoring cabinet of the anti-sloshing equipment. When the HR indicator light is constantly on, the online monitoring cabinet of the anti-sloshing equipment sends a notification signal to the communication screen. After receiving the notification signal, the communication screen sends a fault alarm signal to the control room according to a preset path. Figure 4 The diagram shows the structure of the anti-slip device. KHD1 represents the first anti-slip device, KHD2 represents the second anti-slip device, and KHDN represents the Nth anti-slip device. The online monitoring cabinet for the anti-slip device includes a PLC (Programmable Logic Controller), and the communication panel may include a communication management unit, a switch, and a photoelectric converter, issuing alarms through sound, light, and electricity. The control room may be, for example, a pre-set manned substation, thus promptly issuing alarms to on-duty personnel.
[0053] In one embodiment, the anti-power fluctuation device further includes a remote control system DCS circuit, referenced. Figure 1As shown, the DCS circuit includes a second normally open contact 102 of the contactor connected in series with the DCS controller, and a first three normally open contact 113 and a second three normally open contact 123 connected in series with the second normally open contact 102 and then in parallel with the second normally open contact 102. The first anti-power fluctuation controller is further configured to control the first three normally open contact 113 to close when a power fluctuation is detected. The second anti-power fluctuation controller is further configured to control the second three normally open contact 123 to close when a power fluctuation is detected.
[0054] The first anti-power fluctuation controller includes a first power fluctuation identification chip, and the second anti-power fluctuation controller includes a second power fluctuation identification chip. The first power fluctuation identification chip and the second power fluctuation identification chip are used to detect whether the zeroth normally open contact experiences power fluctuation.
[0055] Voltage flicker detection chips are typically used to detect instantaneous voltage fluctuations in the power grid (such as voltage sags, swells, and interruptions) and respond quickly to protect sensitive equipment from damage. Their core working principle includes three stages: signal acquisition, analysis and judgment, and output control. By real-time monitoring parameters such as voltage amplitude (detecting voltage sags and swells), frequency (detecting power grid frequency fluctuations), phase angle (detecting phase jumps), and duration (judging the severity of the voltage flicker event), and comparing them with set thresholds, logical judgments are made to identify whether a voltage flicker has occurred. Voltage flicker detection chips are existing technology, and this patent will not elaborate on them.
[0056] It should be noted that as long as the circuit control function in this embodiment can be achieved, normally closed contacts can be used to replace normally open contacts in this embodiment, and this patent does not impose any restrictions on this.
[0057] By employing the anti-power fluctuation device provided in this embodiment, two independent anti-power fluctuation controllers are used to detect the occurrence of power fluctuations, and then the normally open contacts are closed to achieve the anti-power fluctuation function. This eliminates the need for an energy storage power supply-type anti-power fluctuation device, reducing equipment costs. Furthermore, with two independent anti-power fluctuation controllers, the probability of both controllers failing simultaneously is almost zero. Therefore, it is impossible for both normally open contacts to close at the same time, resulting in high robustness and reliability.
[0058] Example 2
[0059] This embodiment provides a power supply system, including a power supply circuit for an electrical appliance and a start-stop control circuit. The start-stop control circuit is used to control the opening and closing of the power supply switch of the electrical appliance in the power supply circuit. The start-stop control circuit includes a contactor, which includes a contactor coil, a main contact serving as the power supply switch, and a zeroth normally open contact. When the zeroth normally open contact is closed, the contactor coil is energized, the main contact is closed, and the electrical appliance is energized. When the zeroth normally open contact is opened, the contactor coil is de-energized, the main contact is opened, and the electrical appliance is de-energized. The start-stop control circuit includes the anti-power-dampening device described in Embodiment 1 and any of its embodiments.
[0060] Figure 1 A schematic diagram of the power supply system is shown. Figure 1 As shown, the components are described below:
[0061] FU: Fuse, used to provide short-circuit protection for circuits.
[0062] SA: Local / Remote selector switch, usually installed on the control column next to the machine, is used to switch between local and remote motor starting. When switched to the local position, the motor can only be started locally; when switched to the remote position, the motor can only be started remotely via the DCS.
[0063] SB1: Start button, installed on the control column next to the machine, to start the motor locally.
[0064] SB2: Stop button, installed on the control column next to the machine, to stop the motor locally.
[0065] R1: The normally open contact of the intermediate relay, installed in a remote DCS system to enable remote starting of the motor.
[0066] R2: The normally closed contact of the intermediate relay, installed in a remote DCS system, to enable remote stopping of the motor.
[0067] FR: Thermal relay, used to protect motors from overload. Its main body is connected in series in the motor's main circuit, and its normally closed contact is connected in series in the motor's control circuit. When the motor is overloaded, the normally closed contact of the thermal relay opens, cutting off the contactor circuit in the control circuit. The contactor coil is de-energized, the contactor's main contacts open, and the motor stops.
[0068] Contactor: Used to start and stop the motor. Its main contacts 100 are connected in series in the main circuit of the motor, and its coil 10 is connected in series in the control circuit of the motor. When the coil 10 is not energized, the main contacts 100 are open, and the motor is not energized and is in a stopped state; when the coil 10 is energized and attracts, the main contacts 100 turn to the closed state, and the motor starts after being energized. At the same time, one normally open contact 101 of the contactor is connected in parallel across the "local start button" and the "remote start normally open contact", serving as the contactor's self-holding contact. When the contactor coil 10 is energized, this self-holding contact 101 closes. Since the "local start button" and the "remote start normally open contact" will immediately open after closing, the contactor coil circuit can only be energized and held in the attracted state by the self-holding contact 101. The other normally open contact 102 of the contactor is connected to the remote DCS system. Through the state of this contact, the DCS can know the operating status of the motor.
[0069] KHD Anti-slip Device: The anti-slip device includes two anti-slip controllers ( Figure 1 (Not shown in the diagram) The first anti-voltage fluctuation controller controls switches 111, 112, and 113, and the second anti-voltage fluctuation controller controls switches 121, 122, and 123. Switches 111 and 121 are connected in parallel across the self-holding contact 101 of the contactor. When a voltage fluctuation occurs, the power supply voltage decreases or disappears, the contactor coil 10 is de-energized, and contact 101 opens. The anti-voltage fluctuation device can detect the voltage fluctuation in a very short time and close its normally open contacts 111 and 121, re-energizing the contactor coil 10. Because the contactor disconnection time is very short, the motor can remain running due to inertia. Switches 112 and 122 are respectively connected to the online monitoring cabinet of the anti-voltage fluctuation device, as described in Embodiment 1 above, for monitoring whether the anti-voltage fluctuation device has malfunctioned. Switches 113 and 123 are connected in parallel across the normally open contact 102 of the contactor. The signal after parallel connection is sent to the remote DCS system. The function of this contact is that when a power fluctuation occurs, the contactor will momentarily disconnect, and the normally open contact 102 of the contactor will open. At this time, the DCS will determine that the motor has stopped running and issue a command to start the standby motor. When the anti-power fluctuation device contacts 113 and 123 are connected in parallel, the DCS will always receive a closing command when a power fluctuation occurs, avoiding the DCS from mistakenly determining that the motor has stopped running and starting the standby motor.
[0070] By adopting the power supply system provided in this embodiment, the anti-power fluctuation function is achieved through an anti-power fluctuation device, eliminating the need for an energy storage power supply-type anti-power fluctuation device and reducing equipment costs. Moreover, the anti-power fluctuation device is controlled by two independent anti-power fluctuation controllers, and the probability of both controllers failing simultaneously is almost zero. Therefore, it is impossible for two normally open contacts to close at the same time, resulting in high robustness and reliability.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; these 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 utility model.
Claims
1. An anti-power fluctuation device, applied to the start-stop control circuit of an electrical power supply system, the start-stop control circuit being used to control the opening and closing of the power supply switch of the electrical appliance, the start-stop control circuit including a contactor, the contactor including a contactor coil, a main contact serving as the power supply switch, and a zeroth normally open contact, when the zeroth normally open contact is closed, the contactor coil is energized, the main contact is closed, and the electrical appliance is energized; When the zeroth normally open contact opens, the contactor coil is de-energized, the main contacts open, and the electrical appliance is de-energized; characterized in that, The anti-sloshing device includes: The first normally open contact and the second normally open contact are connected in series and then connected in parallel across the two ends of the zeroth normally open contact; The first anti-sloshing controller is used to detect whether the zeroth normally open contact experiences a sloshing, and when a sloshing is detected, it controls the first normally open contact to close. The second anti-slip controller is used to detect whether the zeroth normally open contact experiences slippage, and when slippage is detected, controls the second normally open contact to close.
2. The anti-sloshing device according to claim 1, characterized in that, The anti-sloshing device also includes: The first two normally open contacts and the second two normally open contacts are respectively connected to the online monitoring cabinet for anti-sloshing equipment; The first anti-power fluctuation controller is also used to control the first two normally open contacts to close when a power fluctuation is detected. The second anti-power fluctuation controller is also used to control the closure of the second normally open contact when a power fluctuation is detected; The online monitoring cabinet for anti-sloshing equipment is used to issue a reminder signal when the first two normally open contacts are closed and / or the second two normally open contacts are closed.
3. The anti-sloshing device according to claim 2, characterized in that, The anti-sloshing equipment online monitoring cabinet includes an online monitoring circuit, which includes a first circuit, a second circuit, and a third circuit connected in parallel. The first circuit includes a coil of a first relay and a first normally open contact connected in series. The second circuit includes a normally closed contact of the first relay and a first indicator light. The third circuit includes a normally open contact of the first relay and a second indicator light.
4. The anti-sloshing device according to claim 2, characterized in that, The anti-sloshing equipment online monitoring cabinet includes an online monitoring circuit, which includes a first circuit, a second circuit, and a third circuit connected in parallel. In the first circuit, the first two normally open contacts and the second two normally open contacts are connected in parallel and then connected in series with the coil of the first relay. The second circuit includes the normally closed contact of the first relay and a first indicator light. The third circuit includes the normally open contact of the first relay and a second indicator light.
5. The anti-sloshing device according to claim 3 or 4, characterized in that, When the second indicator light is constantly on, it indicates a malfunction in the anti-sloshing equipment.
6. The anti-sloshing device according to claim 5, characterized in that, It also includes a communication screen, which is connected to the online monitoring cabinet for anti-sway equipment. When the second indicator light is constantly on, the online monitoring cabinet for anti-sway equipment sends a notification signal to the communication screen. The communication screen is used to send a fault alarm signal to the control room according to a preset path after receiving the notification signal.
7. The anti-sloshing device according to any one of claims 1-4, characterized in that, It also includes a remote control system DCS circuit, wherein the DCS circuit includes a second normally open contact of the contactor connected in series with the DCS controller, and a first third normally open contact and a second third normally open contact connected in series with the second normally open contact and then in parallel with the second normally open contact; the first anti-power fluctuation controller is further configured to control the first third normally open contact to close when a power fluctuation is detected; the second anti-power fluctuation controller is further configured to control the second third normally open contact to close when a power fluctuation is detected.
8. The anti-sloshing device according to any one of claims 1-4, characterized in that, The first anti-power fluctuation controller includes a first power fluctuation identification chip, and the second anti-power fluctuation controller includes a second power fluctuation identification chip. The first power fluctuation identification chip and the second power fluctuation identification chip are used to detect whether the zeroth normally open contact experiences power fluctuation, respectively.
9. A power supply system comprising a power supply circuit for an electrical appliance and a start-stop control circuit, the start-stop control circuit being used to control the opening and closing of a power supply switch for the electrical appliance in the power supply circuit, the start-stop control circuit comprising a contactor, the contactor comprising a contactor coil, a main contact serving as the power supply switch, and a zeroth normally open contact; when the zeroth normally open contact is closed, the contactor coil is energized, the main contact is closed, and the electrical appliance is energized; when the zeroth normally open contact is opened, the contactor coil is de-energized, the main contact is opened, and the electrical appliance is de-energized; the start-stop control circuit comprises an anti-surge device according to any one of claims 1-8.
10. The power supply system according to claim 9, characterized in that, The start-stop control circuit also includes a manual start-stop circuit and a DCS start-stop circuit.