CN209044774U - A kind of prepaid low-voltage broken circuit control device - Google Patents

Abstract

The utility model discloses a kind of prepaid low-voltage broken circuit control devices, including breaker, intelligent control circuit board and pre-paying kilowatt-hour meter；Shunt release is set in the breaker, manual switch is set on the shunt release, the shunt release is connect with the relay switch in intelligent control circuit board；The intelligent control circuit board includes single-chip microcontroller, relay switch, pre-paying kilowatt-hour meter port, and single-chip microcontroller is connect by pre-paying kilowatt-hour meter port with pre-paying kilowatt-hour meter, and single-chip microcontroller controls the opening and closing of relay switch.The shunt release of breaker is connect by the utility model with intelligent control circuit board, is realized under the control of pre-paying kilowatt-hour meter signal and is automatically cut off the power the function of stopping power supply.

Description

A low-voltage prepaid circuit breaker control device

technical field

The utility model relates to a circuit breaking control device, in particular to a low-voltage prepaid circuit breaking control device.

Background technique

Prepaid electricity meters are also called quantitative electricity meters and IC card electricity meters. In addition to the metering function of ordinary electricity meters, in particular, the user buys electricity first, and can use electricity after buying electricity. If the electricity is used up, the user does not continue to buy electricity. , it will automatically cut off the power supply and stop the power supply.

A low-voltage circuit breaker (formerly called an automatic switch) is a switching appliance that can not only make and break normal load current and overload current, but also make and break short-circuit current. In addition to the control function in the circuit, the low-voltage circuit breaker also has certain protection functions, such as overload, short circuit, undervoltage and leakage protection. Low-voltage circuit breakers are generally composed of a sensing part and an execution part. The sensing part receives the external input signal, and through conversion, amplification and judgment, makes a regular response, makes the execution part act, and outputs the corresponding command to achieve the purpose of control. The sensing part is an electromagnetic mechanism, and the execution part is a contact system. The role of the electromagnetic mechanism is to convert electromagnetic energy into mechanical energy, thereby driving the execution of part of the contact action.

The Chinese patent document with the authorization announcement number CN 206877941 U discloses a small circuit breaker, including a circuit breaker and a shunt release, the shunt release is spliced on one side of the circuit breaker and becomes a single level, The operating mechanism arranged in the shunt release is linked with the operating mechanism arranged in the circuit breaker through the connecting shaft. The shunt release is provided with a terminal for receiving the sunset F control signal and a shunt release device. The shunt tripping device is electrically connected to the terminal for instantaneous tripping after receiving the sunset signal. The utility model adopts the assembled miniature circuit breaker, the electromagnetic release for magnetic protection and the shunt release device for remote control are respectively placed in different poles of the miniature circuit breaker, and no electronic circuit board is arranged. , The instantaneous shunt tripping structure in which the terminal is directly electrically connected to the shunt tripping device is adopted, thereby avoiding electromagnetic interference on the shunt tripping device through the electronic circuit board. But this circuit breaker cannot be used for prepaid control and cannot meet the demand.

The Chinese patent document with the authorization announcement number CN 203881827 U discloses a single-phase prepaid watt-hour meter. The multi-function single-phase prepaid watt-hour meter includes a single-phase prepaid watt-hour meter and a circuit breaker. The live line inlet, neutral line inlet and outlet ends of the single-phase prepaid watt-hour meter are respectively connected by wires corresponding to the live line of the circuit breaker. The outlet end and the neutral wire outlet end are connected, and the live wire inlet end and the neutral wire inlet end of the circuit breaker are connected to the power supply; it is characterized in that the shunt release is fixed with the circuit breaker, and the lever of the shunt release is inserted into the circuit breaker. In the switch toggle socket; the trip signal input end of the shunt release is connected to the trip signal output end of the single-phase prepaid watt-hour meter by a wire, and the live wire inlet and neutral wire inlet of the shunt release are respectively Correspondingly, the wires are connected to the live wire outlet end, the neutral wire inlet and outlet ends of the single-phase prepaid watt-hour meter. The watt-hour meter not only has the function of the original single-phase prepaid watt-hour meter, but also has the functions of remote power supply and power off. However, the utility model lacks protection functions such as overload, short circuit, undervoltage and leakage protection.

Utility model content

In view of this, the purpose of this utility model is to provide a low-voltage prepaid circuit breaker control device for the deficiencies of the prior art, which connects the shunt release of the circuit breaker with the intelligent control circuit board, and under the control of the prepaid meter signal Realize the function of automatically cutting off the power supply and stopping the power supply.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a low-voltage prepaid circuit breaker control device, comprising a circuit breaker, an intelligent control circuit board and a prepaid electricity meter; a shunt release is arranged in the circuit breaker, and the A manual switch is arranged on the excitation release, and the shunt release is connected to the relay switch on the intelligent control circuit board; the intelligent control circuit board includes a single-chip microcomputer, a relay switch, and a prepaid meter port, and the single-chip microcomputer passes through the prepaid meter port. It is connected with the prepaid electricity meter, and the single-chip microcomputer controls the opening and closing of the relay switch.

As a further improvement of the present invention, an overcurrent release is arranged in the circuit breaker.

As a further improvement of the present invention, the circuit breaker is provided with an overheat release

As a further improvement of the present invention, an undervoltage release is arranged in the circuit breaker.

As a further improvement of the present invention, an electric operating mechanism is arranged in the circuit breaker, and the electric operating mechanism drives the handle of the circuit breaker to rotate through the inner shaft to realize opening and closing. The electric operating mechanism and the control port on the intelligent control circuit board connect.

The beneficial effects of the present utility model are:

1. The utility model has the functions of overload, short circuit and overvoltage and undervoltage protection, and also has a prepaid control function. It is small in size and full in functions. It can utilize the existing prepaid electricity meter to realize remote control of power failure and power transmission and safe electricity consumption protection. , strong practicability.

2. When overvoltage or undervoltage occurs, the microcontroller can detect the voltage fault through voltage sampling, and at the same time issue a tripping command to trip the circuit breaker.

3. When the protected line is overloaded or short-circuited, the main circuit switch contacts in the circuit breaker can automatically trip and cut off the power supply, thus playing the role of overload or short-circuit protection.

4. Control the opening and closing operation of the circuit breaker by controlling the change of the level of the signal line. When tripping, the electric operating mechanism drives the handle to rotate to achieve rapid tripping; during the closing operation, the motor rotates through the inner shaft to drive the handle to rotate to realize closing.

5. The charge control function of the circuit breaker is realized through the prepayment control function of the electric meter, and there is no need to configure additional prepayment modules, making full use of existing resources.

6. The control terminal of the prepaid meter outputs a high level of 220V in the normal state and a low level of 0V in the arrears state. The output terminal of the electric meter is connected to the intelligent control circuit board. When the intelligent control circuit board receives the signal that the output of the electric meter is at a high level, the single-chip microcomputer outputs a disconnection signal to the relay switch, the relay remains disconnected, the shunt release does not work, and the circuit is open. The device is in the closed state and the power supply is normal. When the meter is in arrears, it outputs a low-level control signal to the intelligent control circuit board, and the single-chip microcomputer continuously outputs a pulse closing signal to the relay switch. Under the control of the signal, it is closed and disconnected intermittently until the user pays the bill. When the meter is in a normal state and outputs a 220V high-level signal, the single-chip microcomputer controls the relay switch to keep the open state. During the arrears process of the meter, because the single-chip microcomputer continues to output the pulse closing signal to the relay switch, even if the user forcibly closes the circuit breaker, the circuit breaker will automatically open again to prevent electricity theft.

Description of drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention.

Reference numerals: 1-circuit breaker, 2-intelligent control circuit board, 3-electricity meter, 4-shunt release, 5-manual switch, 6-microcomputer, 7-relay switch, 8-current release, 9 - Overheat release, 10-undervoltage release.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

As shown in Figure 1, a low-voltage prepaid circuit breaker control device includes a circuit breaker 1, an intelligent control circuit board 2 and a prepaid electricity meter 3; the circuit breaker 1 is vertically installed in a distribution box using a TH35-7.5 steel mounting rail , a shunt release 4 is arranged in the circuit breaker 1, a manual switch 5 is arranged on the shunt release 4, and the shunt release 4 is connected with the relay switch 7 on the intelligent control circuit board 2; the The intelligent control circuit board 2 includes a single-chip microcomputer 6, a relay switch 7, and a 3 port of a prepaid electricity meter. The single-chip microcomputer 6 is connected to the prepaid electricity meter 3 through the 3 port of the prepaid electricity meter.

The charge control function of the circuit breaker 1 is realized by the prepayment control function of the electric meter 3, and there is no need to configure additional prepayment modules, and the existing resources are fully utilized. The control terminal of the prepaid electricity meter 3 outputs a high level of 220V in a normal state, and a low level of 0V in arrears state. The output terminal of the electric meter 3 is connected to the intelligent control circuit board 2, and the intelligent control circuit board 2 receives the signal that the electric meter 3 outputs a signal at a high level, then the single-chip microcomputer 6 outputs a disconnection signal to the relay switch 7, and the relay remains disconnected. The excitation release 4 does not work, the circuit breaker 1 is in the closed state, and the power supply is normal. When the electricity meter 3 is in arrears and outputs a low-level control signal to the intelligent control circuit board 2, the single-chip microcomputer 6 continuously outputs a pulse closing signal to the relay switch 7, the relay is closed, the shunt release 4 is turned on, and the circuit breaker 1 instantly disconnects the circuit , the relay switch 7 is closed and disconnected intermittently under the control of the pulse closing signal, until the user pays the bill, and when the meter 3 is in a normal state and outputs a 220V high-level signal, the single-chip microcomputer 6 controls the relay switch 7 to keep the open state. During the arrears process of the electricity meter 3, because the single-chip microcomputer 6 continues to output a pulse closing signal to the relay switch 7, even if the user forcibly closes the circuit breaker 1, the circuit breaker 1 will automatically open again to prevent electricity theft.

The circuit breaker 1 is provided with an overcurrent release 8 , an overheat release 9 and an undervoltage release 10 . Overcurrent protection is a common protection applied to the secondary circuit. It uses the secondary induced current of the current transformer to achieve the protection of the line, motor, transformer, etc. through the relay. The overheat release instantly cuts off the circuit when a short circuit occurs, protecting the circuit and electrical equipment from further damage. The under-voltage release works when its terminal voltage drops to 70% to 35% of the rated working voltage, and the under-voltage release operates to avoid damage to electrical appliances due to excessive voltage fluctuations. When the power supply voltage is equal to 35% of the rated working voltage of the release, the undervoltage release can prevent the circuit breaker from closing completely; when the supply voltage is equal to or greater than 85% of the rated working voltage of the undervoltage release, under thermal conditions , to ensure the reliable closing of the circuit breaker.

The utility model has the functions of overload, short circuit and overvoltage and undervoltage protection, and also has the function of prepayment control, with small size and complete functions, and can utilize the existing prepaid electricity meter 3 to realize remote control of power failure and power transmission and safe power consumption protection. Strong practicality.

When overvoltage or undervoltage occurs, the microcontroller can detect the voltage fault through voltage sampling, and at the same time issue a trip command to trip the circuit breaker 1. When the protected line is overloaded or short-circuited, the main circuit in the circuit breaker 1 will trip. The switch contacts can automatically trip and cut off the power supply, so as to protect against overload or short circuit.

Embodiment 2

The structure of this embodiment is basically the same as that of the first embodiment, the difference is that an electric operating mechanism is arranged in the circuit breaker 1, and the electric operating mechanism drives the handle of the circuit breaker 1 to rotate through the inner shaft to realize opening and closing. Control port connection on Smart Control Board 2.

The electric operating mechanism includes a motor and a transmission rod linked with the motor shaft, a shaft hole is arranged inside the handle, one end of the transmission rod is fixed in the shaft hole inside the handle, and the transmission rod rotates synchronously with the handle.

The single chip microcomputer on the intelligent control circuit board receives the opening and closing instruction transmitted by the prepaid meter through the change of the control signal line level. During tripping, the electric operating mechanism drives the handle to rotate to achieve rapid tripping; during closing operation, the motor rotates through the inner shaft to drive the handle to rotate to realize closing.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention are not departing from the technical solutions of the present invention. The spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. A low-voltage prepaid circuit breaker control device, characterized in that: comprising a circuit breaker, an intelligent control circuit board and a prepaid electricity meter; A shunt release is arranged in the circuit breaker, a manual switch is arranged on the shunt release, and the shunt release is connected to a relay switch on an intelligent control circuit board; The intelligent control circuit board includes a single-chip microcomputer, a relay switch, and a prepaid electricity meter port. The single-chip microcomputer is connected to the prepaid electricity meter through the prepaid electricity meter port, and the single-chip microcomputer controls the opening and closing of the relay switch. The intelligent control circuit board is arranged inside the circuit breaker housing. . 2 . The low-voltage prepaid circuit breaker control device according to claim 1 , wherein an overcurrent release is arranged in the circuit breaker. 3 . 3 . The low-voltage prepaid circuit breaker control device according to claim 1 , wherein an overheat release is arranged in the circuit breaker. 4 . 4 . The low-voltage prepaid circuit breaker control device according to claim 1 , wherein an undervoltage release is arranged in the circuit breaker. 5 . 5 . The low-voltage prepaid circuit breaker control device according to claim 1 , wherein an electric operating mechanism is arranged in the circuit breaker, and the electric operating mechanism drives the handle of the circuit breaker to rotate through the inner shaft to realize opening and closing. 6 . The electric operating mechanism is connected with the control port on the intelligent control circuit board.