CN217362554U

CN217362554U - Intelligent circuit breaker

Info

Publication number: CN217362554U
Application number: CN202220889967.XU
Authority: CN
Inventors: 阳林; 王勇; 王浩宇; 赵旭东
Original assignee: Chongqing Ruidun Technology Development Co ltd
Current assignee: Chongqing Ruidun Technology Development Co ltd
Priority date: 2022-04-15
Filing date: 2022-04-18
Publication date: 2022-09-02
Anticipated expiration: 2032-04-18

Abstract

The utility model belongs to the technical field of the circuit breaker, specifically disclose an intelligent circuit breaker, it includes the casing, be provided with circuit breaker mechanical operation part and intelligent operation part in the accommodation space of casing, intelligent operation part includes the magnetic latching relay, the power supply line of circuit breaker mechanical operation part establishes ties with the power supply line of magnetic latching relay, intelligent operation part still includes electric current/voltage sampling unit, electric current/voltage signal on the power supply line of magnetic latching relay is gathered to electric current/voltage sampling unit and is transmitted for the control unit, the control unit's output is connected with the control end of magnetic latching relay. By adopting the technical scheme, the intelligent control of the circuit breaker is realized by utilizing the intelligent operation part, the circuit can be automatically cut off when the circuit is in fault, the reliable protection is carried out, and meanwhile, the control unit can transmit information to the control center, so that the monitoring, the checking and the control of a user are facilitated.

Description

Intelligent circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker, concretely relates to intelligent circuit breaker.

Background

The circuit breaker can close, bear and break the current under the normal loop condition, and can close, bear and break the current under the abnormal loop condition within the specified time. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur.

As one of the circuit breakers, an air circuit breaker has been widely used, which is a low-voltage switch having an arc extinguishing device, which is manually or electrically closed by using an insulating medium as air, is kept at a closing position by a latch, is tripped by a trip mechanism, and is widely used in an ac or dc device of 500V or less, and is used to make, break and carry a rated operating current, and a fault current such as a short circuit or an overload in a circuit. When overload, short circuit, voltage reduction or disappearance occur in the circuit, the circuit can be automatically cut off, and reliable protection is performed.

The existing circuit breaker adopts a mechanical structure to control opening and closing, is inconvenient for remote control and query, needs to be checked and maintained regularly, and is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligent circuit breaker can realize the intelligent control to the circuit breaker.

In order to achieve the above object, the basic scheme of the utility model is: an intelligent circuit breaker comprises a shell, wherein a mechanical operation part and an intelligent operation part of the circuit breaker are arranged in an accommodating space of the shell;

the intelligent operation part comprises a magnetic latching relay, and a power supply line of the mechanical operation part of the circuit breaker is connected with a power supply line of the magnetic latching relay in series;

the intelligent operation part also comprises a current/voltage sampling unit, the current/voltage sampling unit collects current/voltage signals on a power supply line of the magnetic latching relay and transmits the current/voltage signals to the control unit, and the output end of the control unit is connected with the control end of the magnetic latching relay.

The working principle and the beneficial effects of the basic scheme are as follows: the current/voltage sampling unit is used for collecting required current or voltage signals, and the control signal can judge whether the circuit has a fault according to the collected current or voltage signals, so that whether the magnetic latching relay is switched off is controlled, the intelligent control of power-on and power-off of the circuit is realized, the circuit can be automatically cut off when the circuit has a fault, and reliable protection is carried out.

And the input end of the metering unit is connected with the output end of the current/voltage sampling unit, and the metering unit is used for recording the electric quantity output by the magnetic latching relay and transmitting the electric quantity to the control unit.

And the metering unit is utilized to collect electric quantity information, so that subsequent checking or analysis is facilitated.

And the power supply end of the internal power supply module is respectively connected with the current/voltage sampling unit, the metering unit and the control unit.

The internal power supply module can supply power to the corresponding units, and normal work of the equipment is guaranteed.

Further, the magnetic latching relay comprises at least one switch channel, the switch channel comprises an input terminal and an output terminal, the input terminal is connected with a direct current or alternating current power supply, and the output terminal is externally connected with a direct current or alternating current load;

the contact of the relay is connected in series in a connecting passage of the input terminal and the output terminal;

when the direct current power supply is connected, arc extinguishing devices are connected in parallel at two ends of the contact.

The power-on and power-off of the external direct current load are realized through the control switch channel, the damage of electric arcs generated when the power is on and off to the relay contact is reduced through the arc extinguishing device, the size is small, the cost is low, and the power-on and power-off control can be met.

Further, the power supply circuit further comprises a driving circuit, the driving circuit is arranged in a power supply loop of the relay coil, a power supply end of the driving circuit is connected with the internal power supply module, an output end of the driving circuit is connected with a power supply end of the coil, and a control end of the driving circuit is connected with an output end of the control unit.

Therefore, the power-on or power-off of the driving circuit to the external direct current load can be effectively and safely controlled through weak current signals.

Further, the current/voltage sampling unit is a current sensor or a voltage sensor.

The current sensor and the voltage sensor have simple structures and are beneficial to use.

Furthermore, the intelligent operation part is divided into at least two parts, at least one part of the intelligent operation part is overlapped with the mechanical operation part of the circuit breaker, and the other parts are positioned on the side surface of the mechanical operation part of the circuit breaker.

With the magnetic latching relay of intelligent operation part, arc control device, electric current/voltage sampling unit, the measurement unit, the control unit can be split into several parts with inside power module, and at least partly overlaps with circuit breaker mechanical operation part and arranges, and other parts are located circuit breaker mechanical operation part side, and the dispersion installation of being convenient for avoids taking great installation space, guarantees that intelligent circuit breaker's casing thickness is unchangeable.

Furthermore, the metering unit, the control unit and the internal power supply module are positioned on a first intelligent circuit board, and the first intelligent circuit board and the mechanical operation part of the circuit breaker are arranged in an overlapping mode;

the magnetic latching relay, the arc extinguishing device and the current/voltage sampling unit are installed on a second intelligent circuit board, and the second intelligent circuit board is arranged on the side face of the mechanical operation part of the circuit breaker.

Each device is installed on the intelligent circuit board that corresponds, is convenient for arrange the wiring and integrated installation, and first intelligent circuit board overlaps the installation with circuit breaker mechanical operation part, need not to increase casing thickness like this, does benefit to the installation use of casing, and circuit breaker mechanical operation part side is arranged in to second intelligent circuit board, and the installation of being convenient for is rationally utilized casing inner space.

Furthermore, the intelligent operation part is integrally arranged on an intelligent circuit board, the intelligent circuit board is overlapped with the mechanical operation part of the circuit breaker, or the intelligent circuit board is positioned on the side surface of the mechanical operation part of the circuit breaker.

The intelligent operation part is integrally installed on the intelligent circuit board, so that the intelligent circuit board is convenient to integrate and install.

Further, the control unit is connected with the control center through a communication port.

Simple structure and easy use. And the control unit can transmit the information to the control center, so that the monitoring, the checking and the control of a user are facilitated.

Drawings

Fig. 1 is a schematic structural diagram of the intelligent circuit breaker of the present invention;

fig. 2 is a schematic structural diagram of the housing of the intelligent circuit breaker of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and 2, the utility model discloses an intelligent circuit breaker, it includes the casing, is provided with circuit breaker mechanical operation part and intelligent operation part in the accommodation space of this casing, and circuit breaker mechanical operation part can adopt current arbitrary low voltage circuit breaker's mechanical structure. The input end of the mechanical operation part of the circuit breaker is electrically connected with the input end of the main power supply.

The intelligent operation part comprises a magnetic latching relay, a power supply line of the mechanical operation part of the circuit breaker is connected with the power supply line of the magnetic latching relay in series, and the output end of the magnetic latching relay is electrically connected with the output end of the main power supply. Preferably, the magnetic latching relay comprises at least one switch channel, the switch channel comprises an input terminal and an output terminal, the input terminal is electrically connected with a direct current or alternating current power supply, and the output terminal is externally connected with a direct current or alternating current load. The input terminal and the output terminal can be selected from the existing electric connection base capable of bearing large current, such as the current bearing is more than 40A, and the current can reach 50A, 120A or even more. The contacts of the relay are connected in series in the connection path of the input terminal and the output terminal, and arc extinguishing devices are connected in parallel at both ends of the contacts when a direct current power supply is connected. The arc extinguishing device is preferably, but not limited to, an existing arc extinguishing product, such as a DM-2 type direct current arc extinguisher manufactured by great company of electronic technology, and a composite PTC thermistor manufactured by Huaju technology, or an RC arc extinguishing circuit is selected, and is connected in series through a resistor and a capacitor, and the series circuit is connected in parallel at two ends of a relay.

The intelligent operation part also comprises a current/voltage sampling unit, the current/voltage sampling unit collects current/voltage signals on a power supply line of the magnetic latching relay and transmits the current/voltage signals to the control unit, and the output end of the control unit is electrically connected with the control end of the magnetic latching relay. Preferably, the current/voltage sampling Unit is a current sensor (such as a hall-type current sensor and a current transformer of SZ 1K-50) or a voltage sensor (such as an MIK-DZV single-phase direct-current voltage sensor), the control Unit may employ an MCU (micro controller Unit), the control Unit controls the relay coil to be powered on or powered off through an electric control end, so as to realize the on/off of the switch, and the electric control end may be a control end of a driving device connected in series in a power-on loop of the relay coil, such as a gate of an MOS transistor, or a base of a triode.

In this embodiment, the control unit includes a first comparator (e.g., LM324, LM339, etc.), a first input of the first comparator is electrically connected to an output of the current sampling unit, and the current sampling unit collects a current signal on a power supply line of the magnetic latching relay and transmits the current signal to the control unit. The second input end of the first comparator is connected with a current threshold value memory, the threshold value stored in the current threshold value memory is smaller than the current threshold value when the mechanical operation part of the circuit breaker trips (the tripper trips), and if the current threshold value when the mechanical operation part of the circuit breaker trips is 1.2 times of the rated current of normal equipment operation, the current threshold value stored in the threshold value memory can be 1.19 times of the rated current of the normal equipment operation.

In this embodiment, the control unit includes a second comparator (e.g., LM324, LM339, etc.), a first input end of the second comparator is electrically connected to an output end of the voltage sampling unit, and the voltage sampling unit collects a voltage signal on a power supply line of the magnetic latching relay and transmits the voltage signal to the control unit. And a second input end of the second comparator is connected with a voltage threshold value memory, and the threshold value stored in the voltage threshold value memory is smaller than the voltage threshold value when the mechanical operation part of the circuit breaker trips, and if the voltage threshold value when the mechanical operation part of the circuit breaker trips is 1.15 times of the rated voltage of normal equipment operation, the threshold value stored in the threshold value memory can be 1.14 times of the rated voltage of normal equipment operation.

The output ends of the first comparator and the second comparator are electrically connected with the control end of the magnetic latching relay through an OR gate, and when the signal value acquired by the current/voltage sampling unit is greater than or equal to the threshold value stored in the threshold value storage, the comparator outputs a control signal to the control end of the magnetic latching relay to control the magnetic latching relay to be switched off. The utility model discloses an intelligence operation part moves in preference to mechanical operation part, is convenient for carry out intelligent monitoring and remote control, and simultaneously, circuit breaker mechanical operation part also protects as supplementary mode, has improved the security.

More preferably, the control unit includes a signal receiving unit, and the signal receiving unit is an optical signal receiving unit, or a triggering unit for receiving an output signal of the external sensor, or a wireless communication signal receiving module, or a wired communication signal receiving module. The signal receiving unit is used for receiving the collected current signals or voltage signals, and the output end of the signal receiving unit is electrically connected with the electric control end of the relay. When the signal receiving unit is an optical signal receiving unit, the signal receiving unit is preferably, but not limited to, a photoelectric switch, and the photoelectric switch receives an external optical signal and outputs a high-level signal to an electric control end of a relay connected with the photoelectric switch, so that the relay is closed, an external direct-current load is powered on, and when the external optical signal cannot be received, a low level signal is output to the electric control end of the relay connected with the photoelectric switch, so that the switch is disconnected, and the external direct-current load is powered off.

The utility model discloses an among the preferred scheme, intelligent circuit breaker still includes the metering unit, and the input of metering unit and the output electric connection of electric current/voltage sampling unit for record the electric quantity of magnetic latching relay output, and transmit to the control unit, the metering unit can adopt voltmeter, ampere meter etc.. The control unit is electrically connected with the control center through a communication port, and the communication port can adopt a 485 port and a 232 port or utilize wireless transmission modules such as WiFi and Bluetooth to communicate. The control unit further comprises a processor, the processor is preferably but not limited to a single chip microcomputer (STM 32051C8T6 in model number), the processor is connected and communicated with the 485 serial port communication module through a UART serial port, and the 485 serial port communication module is electrically connected with a 485 interface of the remote control center through a serial port line. The processor is electrically connected with the current/voltage sampling unit and the output end of the metering unit through the ADC pin respectively.

The utility model discloses an among the preferred scheme, intelligent circuit breaker still includes internal power module, internal power module's feeder ear respectively with electric current/voltage sampling unit, measurement unit and the control unit electric connection, internal power module can adopt 48V's DC power supply. The internal power supply module can supply power to the corresponding units, and normal work of the equipment is guaranteed.

The utility model discloses an among the preferred scheme, intelligent circuit breaker still includes drive circuit, and drive circuit sets up in relay coil's power supply loop. The power supply end of the driving circuit is electrically connected with the internal power supply module, the output end of the driving circuit is electrically connected with the power supply end of the coil, and the control end of the driving circuit is electrically connected with the output end of the control unit. The driving circuit is preferably but not limited to a transistor driving circuit or an MOS transistor driving circuit, for example, the driving circuit includes a transistor and a first resistor, a first end of a coil of the relay is electrically connected to the power supply terminal, a second end of the coil is electrically connected to a collector of the transistor, an emitter of the transistor is connected to ground, a base of the transistor is connected to the first end of the first resistor, a second end of the first resistor is electrically connected to an output terminal of the control unit or an output terminal of the signal receiving unit or a first output terminal of the processor, and a contact of the relay is connected in series in a connection path of the input terminal and the output terminal.

The intelligent operation part is divided into at least two parts, when the intelligent circuit breaker is installed, at least one part of the intelligent operation part is overlapped with the mechanical operation part of the circuit breaker, if at least one part of the intelligent operation part is located below the mechanical operation part of the circuit breaker, and the other part of the intelligent operation part is located on the side face of the mechanical operation part of the circuit breaker. The width and the thickness of the shell of the intelligent circuit breaker are unchanged, and the length can be increased appropriately according to needs.

The utility model discloses an among the preferred scheme, measurement unit, the control unit and internal power module are located first intelligent circuit board, and first intelligent circuit board overlaps with circuit breaker mechanical operation part and arranges. The magnetic latching relay, the arc extinguishing device and the current/voltage sampling unit are installed on a second intelligent circuit board, and the second intelligent circuit board is arranged on the side face of the mechanical operation part of the circuit breaker.

The orientation of the basis of the utility model is explained as follows: taking the top view 2 as an example, the operating handle is located above the intelligent circuit breaker, the power input terminal is located on the left side of the intelligent circuit breaker, and the direction facing the paper is the front. The first intelligent circuit board can be positioned above, below, in front of or behind the mechanical operation part of the circuit breaker (the first intelligent circuit board is positioned below the mechanical operation part of the circuit breaker as shown in fig. 2), and the second intelligent circuit board can be positioned on the left side or the right side of the mechanical operation part of the circuit breaker (the second intelligent circuit board is positioned on the right side of the mechanical operation part of the circuit breaker as shown in fig. 2).

The utility model discloses an among another kind of preferred scheme, intelligence operation part is whole to be set up on an intelligent circuit board, and during the installation of intelligent circuit breaker, intelligent circuit board overlaps with circuit breaker mechanical operation part and arranges (be located circuit breaker mechanical operation part's top promptly, or below, or the place ahead, or rear), perhaps intelligent circuit board is located circuit breaker mechanical operation part's side. The intelligent operation part is integrally installed on the intelligent circuit board, so that the intelligent circuit board is convenient to integrate and install.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The intelligent circuit breaker is characterized by comprising a shell, wherein a mechanical operation part and an intelligent operation part of the circuit breaker are arranged in an accommodating space of the shell;

2. The intelligent circuit breaker according to claim 1, further comprising a metering unit, wherein an input end of the metering unit is connected with an output end of the current/voltage sampling unit, and is used for recording the electric quantity output by the magnetic latching relay and transmitting the electric quantity to the control unit.

3. The smart circuit breaker according to claim 1, further comprising an internal power module, wherein the power supply terminals of the internal power module are respectively connected with the current/voltage sampling unit, the metering unit and the control unit.

4. The smart circuit breaker of claim 1 wherein said magnetic latching relay comprises at least one switch channel, said switch channel comprising an input terminal and an output terminal, said input terminal being connected to a dc or ac power source and said output terminal being externally connected to a dc or ac load;

5. The intelligent circuit breaker according to claim 1 or 4, further comprising a driving circuit, wherein the driving circuit is disposed in the power supply loop of the relay coil, the power supply terminal of the driving circuit is connected to the internal power module, the output terminal of the driving circuit is connected to the power supply terminal of the coil, and the control terminal of the driving circuit is connected to the output terminal of the control unit.

6. The smart circuit breaker of claim 1 wherein the current/voltage sampling unit is a current sensor or a voltage sensor.

7. The smart circuit breaker of claim 1 wherein the smart run section is divided into at least two sections, at least one section of the smart run section being disposed in overlapping relation with the mechanical run section of the circuit breaker, the other section being located on a side of the mechanical run section of the circuit breaker.

8. The smart circuit breaker of claim 7 wherein the metering unit, the control unit, and the internal power module are located on a first smart circuit board, the first smart circuit board being disposed in overlapping relation with the mechanical operating portion of the circuit breaker;

9. The smart circuit breaker of claim 1, wherein the smart operation part is integrally provided on a smart circuit board disposed to overlap with the mechanical operation part of the circuit breaker, or the smart circuit board is located at a side of the mechanical operation part of the circuit breaker.

10. The smart circuit breaker of claim 1 wherein the control unit is connected to a control center through a communication port.