A delayed closing type fee control system

Abstract

The present invention provides a delayed closing type fee control system, comprising: a load management circuit, including a load management terminal FK1, which is electrically connected to a power vending controller and is used to receive arrears information and payment information and issue corresponding instructions; a tripping circuit, including an automatic tripping circuit, which is communicatively connected to the load management circuit; a closing circuit, including an automatic closing circuit, which is communicatively connected to the load management circuit; and a delay control circuit, which is communicatively connected to the load management circuit and the closing circuit, respectively. When the load management terminal receives the arrears information, it sends a tripping pulse signal, and the load management circuit controls the automatic tripping circuit to conduct, and simultaneously triggers the delay control circuit, which is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal. When the load management terminal receives the payment information, the automatic closing circuit conducts. The present invention realizes automatic buffer closing of fee control, improves power efficiency, and has high safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy fee control, and in particular relates to a time-delay closing type fee control system. Background Art

[0002] The electricity sales management device is a device specially developed to solve the problems of remote meter reading and remote control of electricity charging in the power department. It integrates power metering, remote communication, prepayment and anti-theft functions.

[0003] This device is suitable for large, medium, and small-sized packaged high-voltage power supply and high-metering users with an AC rated frequency of 50Hz, a rated voltage of 10kV, and a rated current of 1250A, or capacities of 315kVA or less. It covers currents ranging from 630A to 1250A and consists of a power sales controller, a three-phase energy meter, a pole-mounted vacuum circuit breaker, a control system, and a cabinet.

[0004] Currently, the ZKW32 integrated high-voltage prepaid systems operating in power grids typically feature a terminal control column with a vacuum circuit breaker for opening and closing, enabling fee control. However, in actual operation, after opening due to arrears, the circuit breaker must be manually closed again by pressing the closing button, preventing automatic closing for fee control. Customers must visit the power station to manually close the circuit breaker after each power outage and payment, restoring power. In the WSDY box-type low-voltage prepaid systems operating in power grids, the low-voltage switch is an electric operating mechanism installed on the molded case circuit breaker to achieve the opening and closing functions. However, in actual operation, even after opening the molded case circuit breaker, the circuit breaker must be closed again by pressing the closing button, which can easily lead to misoperation. The WSDY box-type low-voltage prepaid system typically incorporates an electric operating mechanism on top of the molded case circuit breaker, but this mechanism suffers from low mechanical reliability and is prone to electrical misoperation, impacting power supply efficiency.

[0005] Therefore, there is an urgent need for a delayed closing type fee control system that not only has the fee control automatic closing function, but also has the wrong opening and wrong closing protection function, which is safer and more reliable to use. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a delayed closing type fee control system, which has both a fee control automatic closing function and a mis-opening and mis-closing protection function, and is safer and more reliable to use.

[0007] In order to achieve the above-mentioned object, the present invention provides a delayed closing type fee control system, comprising:

[0008] The load management circuit includes a load management terminal FK1, which is electrically connected to the power vending controller, and the power vending controller is communicatively connected to the master station, and is used to receive arrears information and payment information and issue corresponding instructions;

[0009] A trip circuit, including an automatic trip circuit, wherein the automatic trip circuit is communicatively connected to the load management circuit and is connected in parallel with the load management circuit;

[0010] A closing circuit, including an automatic closing circuit and a manual closing circuit, wherein the closing circuit is communicatively connected to the load management circuit and is connected in parallel with the tripping circuit;

[0011] A time delay control circuit, the time delay control circuit being communicatively connected to the load management circuit and the closing circuit respectively;

[0012] The load management terminal that receives the arrears information sent by the master station sends a trip pulse signal. The load management circuit that receives the trip pulse signal controls the automatic trip circuit to be turned on, and at the same time triggers the delay control circuit. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; the load management terminal that receives the payment information no longer sends the trip pulse signal, and the automatic closing circuit is turned on.

[0013] As a further improvement of the above solution, the load management circuit further includes a first relay KA1 and a first time relay KT1. Under the action of the trip pulse signal, the load management terminal FK1 is periodically connected in series with the first relay KA1 or the first time relay KT1.

[0014] As a further improvement of the above scheme, the automatic tripping circuit includes a normally open contact KA2 and a tripping coil connected in series, and the normally open contact KA2 is communicatively connected with the first relay KA1. Specifically, when the coil of the first relay KA1 is energized, the normally open contact KA2 is closed, the automatic tripping circuit is turned on, and the neutral wire and the live wire are in a disconnected state, thereby achieving power outage due to arrears.

[0015] As a further improvement of the above scheme, the tripping circuit also includes a manual tripping circuit, which includes a second tripping button SBS2, which is connected in parallel with the normally open contact KA2, and the second tripping button SBS2 and the tripping coil are connected in series to form a manual tripping circuit.

[0016] As a further improvement of the above scheme, the tripping circuit also includes a normally open auxiliary switch, which is connected in series with the tripping coil, and the normally open auxiliary switch is respectively associated with the normally open contact KA2 and the second tripping button SBS2. Specifically, when the normally open contact KA2 or the second tripping button SBS2 is closed, the normally open auxiliary switch is closed; when the normally open contact KA2 or the second tripping button SBS2 is disconnected, the normally open auxiliary switch is disconnected.

[0017] As a further improvement of the above solution, the normally open auxiliary switch is communicatively connected to the electricity sales controller to transmit the state of the tripping circuit to avoid remote malfunction.

[0018] As a further improvement of the above scheme, the closing circuit includes remote and local knobs. When the knob is in the local state, the manual closing circuit is in the working state; when the knob is in the remote state, the automatic closing circuit is in the working state.

[0019] As a further improvement of the above scheme, the automatic closing circuit includes a normally closed third relay KA3, a normally closed first trip button SBS1, a normally open second time relay KT2 and a closing coil connected in series in sequence. The normally open second time relay KT2 is communicatively connected to the delay control circuit. Specifically, when the delay control circuit sends a delayed closing signal, the normally open second time relay KT2 is in a normally open state, and the automatic closing circuit is in a disconnected state. When the delay control circuit does not receive a delayed closing signal, the normally open second time relay is in a closed state, and the automatic closing circuit is in a conducting state.

[0020] As a further improvement of the above scheme, the manual closing circuit includes a normally open closing button SBC, which is connected in parallel with the third relay KA3. The normally open closing button SBC, the normally closed first tripping button SBS1, the normally open second time relay KT2 and the closing coil constitute a manual closing circuit.

[0021] As a further improvement of the above scheme, the closing circuit also includes a normally closed auxiliary switch, which is connected in series with the closing coil, and the normally closed auxiliary switch is associated with the normally open second time relay KT2. Specifically, when the normally open second time relay KT2 is in the disconnected state, the normally closed auxiliary switch is disconnected; when the normally open second time relay KT2 is in the closed state, the normally closed auxiliary switch is closed.

[0022] As a further improvement of the above solution, the normally open auxiliary switch is communicatively connected to the electricity sales controller to transmit the state of the tripping circuit to avoid remote malfunction.

[0023] As a further improvement of the above scheme, the delay control circuit includes a third time relay KT3, a second relay KA4 and a manual button signal contact SBS3 connected in parallel in sequence, the manual button signal contact SBS3 is a normally open contact, and the third time relay KT3 is used to receive the action information of the third time relay KT3 and the manual button signal contact SBS3 respectively and feed it back to the closing circuit to control the on and off of the closing circuit.

[0024] As a further improvement of the above scheme, the third time relay KT3 is communicatively connected to the normally open second time relay KT2, and is used to send a delay signal to the normally open second time relay KT2, and the delay time of the third time relay KT3 is greater than the cycle time of the arrears trip pulse signal.

[0025] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0026] 1. The present invention provides a time-delay closing type fee control system, comprising:

[0027] The load management circuit is arranged between the neutral line and the live line, and includes a load management terminal FK1, which is electrically connected to the power selling controller, and the power selling controller is connected to the main station for communication, and is used to receive arrears information and payment information and issue corresponding instructions; the tripping circuit includes an automatic tripping circuit, which is connected to the load management circuit in communication and in parallel with the load management circuit; the closing circuit includes an automatic closing circuit and a manual closing circuit, which is connected to the load management circuit in communication and in parallel with the tripping circuit; the delay control circuit includes a time delay circuit and a time delay circuit. The load management terminal receives the arrears information sent by the master station, and the load management terminal sends a trip pulse signal. The load management circuit that receives the trip pulse signal controls the automatic trip circuit to be turned on, and at the same time triggers the delay control circuit. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal. When the load management terminal receives the payment information sent by the master station, the load management terminal no longer sends the trip pulse signal, and the automatic closing circuit is turned on. The buffer closing type fee control system of the present invention communicates with the closing circuit and the load management circuit through the delay control circuit. When the load management terminal receives the arrears information sent by the main station, the load management terminal sends a tripping pulse signal, the load management circuit controls the automatic tripping circuit to be turned on, and at the same time triggers the delay control circuit. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; when the load management terminal receives the payment information from the main station, the load management terminal no longer sends the tripping pulse signal, the delay control circuit is not triggered, and the automatic closing circuit is turned on to achieve automatic closing. Such a setting realizes the automatic buffer closing function of fee control, greatly improves the power utilization efficiency, and does not require manual closing.

[0028] 2. The present invention provides a delayed closing type fee control system. In order to facilitate management in different situations, the closing circuit of the present invention includes remote and local knobs. When the knob is in the local state, the manual closing circuit is in the working state; when the knob is in the remote state, the automatic closing circuit is in the working state. The setting of the remote and local knobs enables the present invention to have the function of automatic closing while also being able to manually close, which is convenient for operators to choose manual closing according to some emergencies.

[0029] 3. The present invention provides a delayed closing type fee control system. When the load management terminal receives the overdue fee signal from the main station, the load management terminal sends a tripping pulse signal. At this time, the load management terminal is instantly connected in series with the first relay, the first relay coil is energized, and the second relay KA4 of the delay control loop is closed. After receiving the closing signal of the second relay KA4, the third time relay KT3 starts the delay, and the delay time of the third time relay KT3 is greater than the cycle time of the overdue fee tripping pulse signal. At this time, the second time relay KT2 is always in the delayed disconnection state, so that the closing circuit remains in the disconnected state. During this delay, the load management terminal is constantly sending trip pulse signals, and the delay control circuit is in the triggered state. This ensures that the second time relay KT2 is in the delayed disconnected state. Even if the local location malfunctions by sending a closing signal, that is, by malfunctioning and touching the normally open closing button SBC, the manual button signal contact SBS3 receives a closing signal, and the normally closed first trip button SBS1 opens. At the same time, because the second time relay KT2 is in the delayed disconnected state, the closing circuit is doubly cut off, causing the closing circuit to remain disconnected. Even if the remote location malfunctions by sending a closing signal, because the second time relay KT2 is in the delayed disconnected state, the normally closed third relay KA3 opens, doubly cutting off the closing circuit, causing the closing circuit to remain disconnected. Therefore, the delay control circuit setting not only ensures that the closing circuit buffers closing, but also prevents unforeseen risks and losses caused by malfunctions, making this buffered closing fee control system safer.

[0030] 4. The present invention provides a delayed closing type fee control system, wherein the tripping circuit also includes a normally open auxiliary switch, which is connected in series with the tripping coil, and the normally open auxiliary switch is respectively associated with the normally open contact KA2 and the second tripping button SBS2, and the normally open auxiliary switch is communicatively connected with the power selling controller for transmitting the state of the tripping circuit; the closing circuit also includes a normally closed auxiliary switch, which is connected in series with the closing coil, and the normally closed auxiliary switch is associated with the normally open second time relay KT2, and the normally open auxiliary switch is also communicatively connected with the power selling controller for transmitting the state of the tripping circuit; the present invention communicates with the power selling controller through the normally open auxiliary switch to transmit the state information of the tripping circuit, thereby avoiding the main station from sending a remote malfunction; similarly, the normally closed auxiliary switch is communicatively connected with the power selling controller to transmit the state information of the closing circuit, thereby avoiding the main station from sending a remote malfunction, thereby once again ensuring the safety of the present high-voltage prepaid system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0032] Figure 1 This is a control principle diagram of a ZKW32 high-voltage prepayment system that uses the buffer closing type fee control system of the present invention;

[0033] Figure 2 This is a control principle diagram of the delay control loop of the present invention;

[0034] Figure 3 This is a control principle diagram of a WSDY low-voltage prepayment system using the buffer closing type fee control system of the present invention;

[0035] Figure 4 This is a control flow chart of a ZKW32 high-voltage prepayment system that uses the buffer closing type fee control system of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention, such as first, second, up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] Example 1:

[0041] Reference Figure 1 and Figure 2 The present invention provides a ZKW32 high-voltage prepayment system using the buffer closing type fee control system, comprising:

[0042] The load management circuit includes a load management terminal FK1, which is electrically connected to the power vending controller, and the power vending controller is communicatively connected to the master station, and is used to receive arrears information and payment information and issue corresponding instructions;

[0043] A trip circuit, including an automatic trip circuit, wherein the automatic trip circuit is communicatively connected to the load management circuit and is connected in parallel with the load management circuit;

[0044] A closing circuit, including an automatic closing circuit and a manual closing circuit, wherein the closing circuit is communicatively connected to the load management circuit and is connected in parallel with the tripping circuit;

[0045] A time delay control circuit, the time delay control circuit being communicatively connected to the load management circuit and the closing circuit respectively;

[0046] The load management terminal that receives the arrears information sent by the master station sends a trip pulse signal. The load management circuit that receives the trip pulse signal controls the automatic trip circuit to be turned on and triggers the delay control circuit at the same time. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; the load management terminal that receives the payment information no longer sends the trip pulse signal, and the automatic closing circuit is turned on. The buffer closing type fee control system of the present invention communicates with the closing circuit and the load management circuit through the delay control circuit. When the load management terminal receives the arrears information sent by the master station, the load management terminal sends a trip pulse signal. The load management circuit controls the automatic trip circuit to be turned on and triggers the delay control circuit at the same time. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; when the load management terminal receives the payment information from the master station, the load management terminal no longer sends the trip pulse signal, the delay control circuit is not triggered, and the automatic closing circuit is turned on to achieve automatic closing. Such a setting realizes the automatic buffer closing function of fee control, greatly improves power efficiency, and does not require manual closing.

[0047] As a preferred embodiment, the load management circuit also includes a first relay KA1 and a first time relay KT1. Under the action of a tripping pulse signal, the load management terminal FK1 is connected in series with the first relay KA1 or the first time relay KT1. Specifically, after the load management terminal FK1 receives the arrears information, the normally open point is instantly connected and then disconnected 300 milliseconds later (pulse signal), and the coil of the first relay KA1 is energized.

[0048] In this embodiment, the buffer closing type fee control system adopts a pole-mounted vacuum circuit breaker as a medium for controlling the conduction of the neutral wire and the live wire. Specifically, a tripping coil TQ and a closing coil HQ are provided in the pole-mounted vacuum circuit breaker.

[0049] As a preferred embodiment, the normally open contact KA2 and the trip coil TQ in the pole-mounted vacuum circuit breaker are connected in series to form an automatic trip circuit; the second trip button SBS2 is connected in parallel with the normally open contact KA2, and the second trip button SBS2 and the trip coil TQ in the pole-mounted vacuum circuit breaker are connected in series to form a manual trip circuit; specifically, the normally open contact KA2 is communicatively connected with the first relay KA1, specifically, when the coil of the first relay KA1 is energized, the normally open contact KA2 is closed, the automatic trip circuit is connected, and the neutral wire and the live wire are in a disconnected state, thereby achieving a power outage due to unpaid bills; Since the second trip button SBS2 is connected in parallel with the normally open contact KA2, and the second trip button SBS2 is in the normally open state, when the second trip button SBS2 is manually pressed, the second trip button SBS2 is closed, the manual trip circuit is connected, and the neutral wire and the live wire are in the disconnected state, thereby realizing manual tripping in the event of a power outage due to arrears or an emergency. The setting of the two trip circuits of the present invention is convenient for making flexible choices according to actual conditions. Under normal circumstances, it switches to the automatic trip mode to realize the arrears trip function. In the event of a dangerous situation, the manual trip can be rotated to realize the emergency trip function.

[0050] As a preferred embodiment, the trip circuit also includes a normally open auxiliary switch DL, which is disposed within the pole-mounted vacuum circuit breaker and connected in series with the trip coil TQ. The normally open auxiliary switch DL is associated with the normally open contact KA2 and the second trip button SBS2, respectively. Specifically, when the normally open contact KA2 or the second trip button SBS2 is closed, the normally open auxiliary switch DL is closed; when the normally open contact KA2 or the second trip button SBS2 is opened, the normally open auxiliary switch DL is opened. Simultaneously, the normally open auxiliary switch DL is communicatively connected to the electricity vending controller to transmit the state of the trip circuit, preventing the master station from sending a remote malfunction message, thereby further ensuring the security of the high-voltage prepayment system.

[0051] As a preferred embodiment, the closing circuit includes remote and local knobs SA. When the knob is in the local state, the manual closing circuit is in the working state; when the knob is in the remote state, the automatic closing circuit is in the working state.

[0052] As a preferred embodiment, the normally closed third relay KA3, the normally closed first trip button SBS1, the normally open second time relay KT2 and the closing coil HQ in the pole-mounted vacuum circuit breaker are connected in series in sequence to form an automatic closing circuit, and the normally open second time relay KT2 is communicatively connected to the delay control circuit. Specifically, when the delay control circuit sends a delayed closing signal, the normally open second time relay KT2 is in a normally open state, and the automatic closing circuit is in a disconnected state. When the delayed closing signal is not received from the delay control circuit, the normally open second time relay is in a closed state, and the automatic closing circuit is in a conducting state. In this embodiment, the automatic closing circuit is connected in series with the contacts corresponding to the remote knob. Specifically, when the knobs of the remote and local knobs are in the remote state, the automatic closing circuit is in a working state, and manual closing cannot be performed at this time.

[0053] As a preferred embodiment, the normally open closing button SBC is connected in parallel with the third relay KA3, and the normally open closing button SBC, the normally closed first tripping button SBS1, the normally open second time relay KT2 and the closing coil HQ in the pole-mounted vacuum circuit breaker constitute a manual closing circuit; in this embodiment, the manual closing circuit is connected in series with the contacts corresponding to the local knob. Specifically, when the knobs of the remote and local knobs are in the local state, the manual closing circuit is in the working state, and automatic closing cannot be performed at this time.

[0054] As a preferred embodiment, the closing circuit also includes a normally closed auxiliary switch DL, which is arranged in the pole-mounted vacuum circuit breaker, and the normally closed auxiliary switch DL is connected in series with the closing coil HQ, and the normally closed auxiliary switch DL is associated with the normally open second time relay KT2. Specifically, when the normally open second time relay KT2 is in the disconnected state, the normally closed auxiliary switch DL is disconnected; when the normally open second time relay KT2 is in the closed state, the normally closed auxiliary switch DL is closed; and the normally open auxiliary switch DL is communicatively connected to the electricity sales controller for transmitting the state of the tripping circuit to avoid the main station sending a remote malfunction, thereby ensuring the safety of this high-voltage prepaid system again.

[0055] As a preferred embodiment, the delay control circuit includes a third time relay KT3, a second relay KA4 and a manual button signal contact SBS3 connected in parallel in sequence, the manual button signal contact SBS3 and the second relay KA4 are both normally open contacts, and the third time relay KT3 is used to receive the action information of the third time relay KT3 and the manual button signal contact SBS3 respectively and feed it back to the closing circuit to control the on and off of the closing circuit.

[0056] As a preferred embodiment, after the third time relay KT3 receives the clearing and reset signals, the second time relay KT2 normally opens the delay contact for delay.

[0057] The principle of the remote automatic tripping circuit of the buffer closing type fee control system of the present invention is as follows:

[0058] The electricity sales controller receives the arrears information, and the electricity sales control feeds back the arrears information to the main station, and then the main station sends the arrears information to the corresponding pipeline terminal FK1, and the load management terminal FK1 sends a trip pulse signal. The normally open contact is instantly connected and then disconnected after 300 milliseconds. The first relay KA1 coil is energized, the normally open contact KA2 is closed, the automatic tripping circuit is connected, and the pole vacuum circuit breaker realizes arrears tripping; at the same time, the third time relay KT3 energizes the delay signal point to receive the signal after the normally open point of the trip relay KA4 is closed, the second time relay KT2 actuates the normally open contact to remain in the normally open state, the pole vacuum circuit breaker closing circuit is not conductive, and remains in the tripped state.

[0059] The manual tripping circuit principle of the buffer closing type fee control system of the present invention is as follows:

[0060] Manually press the second trip button SBS2, the third time relay KT3 energizes the delay signal point to receive the signal after the normally open point of the manual trip button SBS3 is closed, the second time relay KT2 actuates the normally open contact to remain in the normally open state, so that the automatic closing circuit is in the disconnected state, the pole-mounted vacuum circuit breaker manual closing circuit is not conductive, and remains in the tripped state.

[0061] The principle of preventing mis-opening and mis-closing of the buffer closing type fee control system of the present invention is as follows:

[0062] When the load management terminal receives the overdue payment signal from the master station, the load management terminal sends a tripping pulse signal. At this time, the load management terminal is instantly connected in series with the first relay, the first relay coil is energized, and the second relay KA4 of the delay control circuit is closed. After receiving the closing signal of the second relay KA4, the third time relay KT3 starts the delay, and the delay time of the third time relay KT3 is greater than the cycle time of the overdue payment tripping pulse signal. At this time, the second time relay KT2 is always in the delayed disconnection state, so that the closing circuit remains in the disconnected state. During this delay, the load management terminal is constantly sending trip pulse signals, and the delay control circuit is in the triggered state. This ensures that the second time relay KT2 is in the delayed disconnected state. Even if the local location malfunctions by sending a closing signal, that is, by malfunctioning and touching the normally open closing button SBC, the manual button signal contact SBS3 receives a closing signal, and the normally closed first trip button SBS1 opens. At the same time, because the second time relay KT2 is in the delayed disconnected state, the closing circuit is doubly cut off, causing the closing circuit to remain disconnected. Even if the remote location malfunctions by sending a closing signal, because the second time relay KT2 is in the delayed disconnected state, the normally closed third relay KA3 opens, doubly cutting off the closing circuit, causing the closing circuit to remain disconnected. Therefore, the delay control circuit setting not only ensures that the closing circuit buffers closing, but also prevents unforeseen risks and losses caused by malfunctions, making this buffered closing fee control system safer.

[0063] Example 2:

[0064] Reference Figure 3 and Figure 2 The present invention provides a WSDY low-voltage prepayment system using the buffer closing type fee control system, comprising:

[0065] The load management circuit includes a load management terminal FK1, which is electrically connected to the power vending controller, and the power vending controller is communicatively connected to the master station, and is used to receive arrears information and payment information and issue corresponding instructions;

[0066] A trip circuit, including an automatic trip circuit, wherein the automatic trip circuit is communicatively connected to the load management circuit and is connected in parallel with the load management circuit;

[0067] A closing circuit, including an automatic closing circuit and a manual closing circuit, wherein the closing circuit is communicatively connected to the load management circuit and is connected in parallel with the tripping circuit;

[0068] A time delay control circuit, the time delay control circuit being communicatively connected to the load management circuit and the closing circuit respectively;

[0069] The load management terminal that receives the arrears information sent by the master station sends a trip pulse signal. The load management circuit that receives the trip pulse signal controls the automatic trip circuit to be turned on and triggers the delay control circuit at the same time. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; the load management terminal that receives the payment information no longer sends the trip pulse signal, and the automatic closing circuit is turned on. The buffer closing type fee control system of the present invention communicates with the closing circuit and the load management circuit through the delay control circuit. When the load management terminal receives the arrears information sent by the master station, the load management terminal sends a trip pulse signal. The load management circuit controls the automatic trip circuit to be turned on and triggers the delay control circuit at the same time. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; when the load management terminal receives the payment information from the master station, the load management terminal no longer sends the trip pulse signal, the delay control circuit is not triggered, and the automatic closing circuit is turned on to achieve automatic closing. Such a setting realizes the automatic buffer closing function of fee control, greatly improves power efficiency, and does not require manual closing.

[0070] As a preferred embodiment, the load management circuit also includes a first relay KA1 and a first time relay KT1. Under the action of a tripping pulse signal, the load management terminal FK1 is connected in series with the first relay KA1 or the first time relay KT1. Specifically, after the load management terminal FK1 receives the arrears information, the normally open point is instantly connected and then disconnected 300 milliseconds later (pulse signal), and the coil of the first relay KA1 is energized.

[0071] In this embodiment, the buffer closing type fee control system uses a molded case circuit breaker as a medium for controlling the conduction of the neutral wire and the live wire. Specifically, a tripping coil TQ and a closing coil HQ are provided in the molded case circuit breaker.

[0072] As a preferred embodiment, the normally open contact KA2 and the trip coil TQ in the molded case circuit breaker are connected in series to form an automatic trip circuit; the second trip button SBS2 is connected in parallel with the normally open contact KA2, and the second trip button SBS2 and the trip coil TQ in the molded case circuit breaker are connected in series to form a manual trip circuit; specifically, the normally open contact KA2 is connected to the first relay KA1 for communication, specifically, the first relay KA1 coil is energized, the normally open contact KA2 is closed, the automatic trip circuit is turned on, the neutral wire and the live wire are in a disconnected state, thereby realizing a power outage due to arrears; The second trip button SBS2 is connected in parallel with the normally open contact KA2, and the second trip button SBS2 is in the normally open state. When the second trip button SBS2 is manually pressed, the second trip button SBS2 is closed, the manual trip circuit is connected, and the neutral wire and the live wire are in the disconnected state, thereby realizing manual tripping in the event of a power outage due to arrears or emergencies. The setting of the two trip circuits of the present invention facilitates flexible selection according to actual conditions. Under normal circumstances, it switches to the automatic trip mode to realize the arrears trip function. In the event of a dangerous situation, the manual trip can be rotated to realize the emergency trip function.

[0073] As a preferred embodiment, the closing circuit includes remote and local knobs SA. When the knob is in the local state, the manual closing circuit is in the working state; when the knob is in the remote state, the automatic closing circuit is in the working state.

[0074] As a preferred embodiment, the normally closed third relay KA3, the normally closed first trip button SBS1, the normally open second time relay KT2 and the closing coil HQ in the molded case circuit breaker are connected in series in sequence to form an automatic closing circuit, and the normally open second time relay KT2 is communicatively connected with the delay control circuit. Specifically, when the delay control circuit sends a delayed closing signal, the normally open second time relay KT2 is in a normally open state, and the automatic closing circuit is in a disconnected state. When the delay control circuit does not receive a delayed closing signal, the normally open second time relay is in a closed state, and the automatic closing circuit is in a conducting state.

[0075] As a preferred embodiment, the normally open closing button SBC is connected in parallel with the third relay KA3, and the normally open closing button SBC, the normally closed first tripping button SBS1, the normally open second time relay KT2 and the closing coil HQ in the molded case circuit breaker constitute a manual closing circuit; in this embodiment, the manual closing circuit is connected in series with the contacts corresponding to the local knob. Specifically, when the knobs of the remote and local knobs are in the local state, the manual closing circuit is in the working state, and automatic closing cannot be performed at this time.

[0076] As a preferred embodiment, the delay control circuit includes a third time relay KT3, a second relay KA4 and a manual button signal contact SBS3 connected in parallel in sequence, the manual button signal contact SBS3 and the second relay KA4 are both normally open contacts, and the third time relay KT3 is used to receive the action information of the third time relay KT3 and the manual button signal contact SBS3 respectively and feed it back to the closing circuit to control the on and off of the closing circuit.

[0077] As a preferred embodiment, after the third time relay KT3 receives the clearing and reset signals, the second time relay KT2 normally opens the delay contact for delay.

[0078] It should be noted that, referring to Figure 4 The fee control system of the buffer closing type provided by the present invention is far as follows: the load management terminal FK is connected to the three-phase four-wire electricity meter PJ for communication, and the three-phase four-wire electricity meter PJ is used to measure the electricity at the user end; the load management terminal FK is also connected to the remote master station for communication, and the remote master station is used to measure the electricity, specifically, to calculate the user's remaining electricity and the relationship between the remaining electricity and the power outage threshold. If the remaining electricity is less than or equal to the power outage threshold, the remote master station sends a tripping command to the load management terminal FK, and the load management terminal FK transmits the tripping command to the load management terminal FK. The corresponding circuit breaker completes the tripping operation, and the load management terminal FK collects the corresponding auxiliary switch status and transmits it to the remote master station to prevent misoperation; when the remote master station receives the payment signal, it recalculates the remaining power and the relationship between the remaining power and the power outage threshold. If the remaining power is greater than the power outage threshold, the remote master station sends a closing command to the load management terminal FK, and the load management terminal FK transmits the tripping command to the corresponding circuit breaker to complete the closing operation. At the same time, the load management terminal FK collects the corresponding auxiliary switch status and transmits it to the remote master station to prevent misoperation.

[0079] The above is a detailed introduction to the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A delayed closing type fee control system, characterized in that: include: A load management circuit is provided between the neutral line and the live line, and includes a load management terminal FK1, a first relay KA1, and a first time relay KT1. The normally open contact of the load management terminal FK1 is connected to the first relay KA1, and the normally closed contact is connected to the first time relay KT1. Under the action of a trip pulse signal, the load management terminal FK1 is connected in series with the first relay KA1 or the first time relay KT1. The load management terminal is electrically connected to the power vending controller, and the power vending controller is communicatively connected to the master station, and is used to receive arrears information and payment information and issue corresponding instructions. A trip circuit, including an automatic trip circuit, wherein the automatic trip circuit is communicatively connected to the load management circuit and is connected in parallel with the load management circuit; The automatic tripping circuit includes a normally open contact KA2 and a tripping coil connected in series, and the normally open contact KA2 is in communication with the first relay KA1. Specifically, when the coil of the first relay KA1 is energized, the normally open contact KA2 is closed, the automatic tripping circuit is turned on, and the neutral wire and the live wire are in a disconnected state; The trip circuit also includes a normally open auxiliary switch, which is connected in series with the trip coil and is associated with the normally open contact KA2. Specifically, when the normally open contact KA2 is closed, the normally open auxiliary switch is closed; and the normally open auxiliary switch is communicatively connected to the power vending controller for transmitting the state of the trip circuit; The closing circuit includes a manual closing circuit and an automatic closing circuit, wherein the closing circuit is communicatively connected to the load management circuit and is connected in parallel with the tripping circuit; the manual closing circuit includes a normally open closing button SBC, which is connected in parallel with the third relay KA3; the normally open closing button SBC, the normally closed first tripping button SBS1, the normally open second time relay KT2, and the closing coil constitute the manual closing circuit; the automatic closing circuit includes a normally closed third relay KA3, a normally closed first tripping button SBS1, a normally open second time relay KT2, and a closing coil connected in series in sequence; the normally open second time relay KT2 is communicatively connected to the delay control circuit; specifically, when the delay control circuit issues a delayed closing signal, the normally open second time relay KT2 is in a normally open state, and the automatic closing circuit is in an open state; when the delay control circuit does not receive a delayed closing signal, the normally open second time relay is in a closed state, and the automatic closing circuit is in a conducting state; The closing circuit also includes a normally closed auxiliary switch, which is connected in series with the closing coil and is associated with the normally open second time relay KT2. Specifically, when the normally open second time relay KT2 is in the off state, the normally closed auxiliary switch is off; when the normally open second time relay KT2 is in the closed state, the normally closed auxiliary switch is closed; and the normally closed auxiliary switch is communicatively connected to the power vending controller for transmitting the state of the closing circuit; A delay control circuit, wherein the delay control circuit is communicatively connected to the load management circuit and the closing circuit respectively; the delay control circuit comprises a third time relay KT3, a second relay KA4, and a manual button signal contact SBS3 connected in parallel in sequence, wherein the manual button signal contact SBS3 is a normally open contact; the third time relay KT3 is used to receive action information from the second relay KA4 and the manual button signal contact SBS3 respectively and feed it back to the closing circuit to control the on and off of the closing circuit; the delay time of the third time relay KT3 is greater than the cycle time of the arrears trip pulse signal; after the third time relay KT3 receives the clear and reset signals, the normally open delay contact of the second time relay KT2 is delayed; The load management terminal that receives the arrears information sends a trip pulse signal. The load management circuit that receives the trip pulse signal controls the automatic trip circuit to be in the on state, and at the same time triggers the delay control circuit. The delay control circuit is used to control the closing delay of the closing circuit until the load management terminal receives the payment signal; the load management terminal that receives the payment signal no longer sends a trip pulse signal, and the automatic closing circuit is in the on state.

2. A delayed closing type fee control system according to claim 1, characterized in that: The closing circuit includes remote and local knobs. When the knob is in the local state, the manual closing circuit is in the working state; when the knob is in the remote state, the automatic closing circuit is in the working state.

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