CN219203062U - Intelligent air circuit breaker - Google Patents

Abstract

The utility model discloses an intelligent air circuit breaker, which comprises a module shell, an operating handle, an electromagnetic release, a moving contact group, a magnetic latching relay, a current detection module and a setting and indicating module for setting a protection current value. Compared with the traditional air circuit breaker adopting a bimetallic strip and a double-coil iron core as overload and leakage protection. The circuit is little affected by the ambient temperature, and meanwhile, fault protection and remote fault alarm of the circuit can be realized.

Description

Intelligent air circuit breaker

Technical Field

The utility model relates to the field of intelligent control of building electric power supply and distribution, in particular to an intelligent air circuit breaker.

Background

At present, a miniature air circuit breaker is adopted in a building to realize illumination of the building, a socket loop is opened and closed, a traditional circuit breaker is used for short-circuit protection, overload protection is realized by means of an electromagnetic release, overload protection is realized by means of bimetallic strips, different current protection values are realized by means of different characteristics of the bimetallic strips in the miniature air circuit breaker aiming at loads with different sizes, and common air switches are distinguished according to the protection current values in the market. Because the bimetallic strip is greatly influenced by temperature, the circuit breaker is not suitable for occasions with high ambient temperature and the like.

At present, the current miniature circuit breaker with the leakage protection is realized by detecting the difference between the inflow current and the outflow current of two loops on an electromagnetic coil, but the overload protection is realized by means of a bimetallic strip, so that the performance of the miniature circuit breaker is greatly affected by temperature.

In the circuit breaker, in the actual engineering, the fault protection and the remote fault alarm of the circuit cannot be realized in the environment with higher temperature or the environment with severe temperature change.

Disclosure of Invention

The utility model aims to provide an intelligent air circuit breaker which can realize overload protection and remote fault alarm of a circuit without being influenced by temperature.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an intelligent air circuit breaker, includes casing, the mechanical locking handle at casing top, inlet wire terminal, moving and static contact group, electromagnetic release, arc extinguishing device and the terminal of being qualified for the next round of competitions in the casing, still is provided with current detection module in the casing, magnetic latching relay and control module, the casing surface be equipped with and set up and instruct the module, two output feet of magnetic latching relay establish ties between inlet wire terminal and terminal of being qualified for the next round of competitions, control module be connected with magnetic latching relay's control foot, set up the setting and instruct the module of protecting current value and be connected to control module for will set up the current value and transmit for control module, load return circuit electric current and transmit for control module between current detection module detection inlet wire and the terminal of being qualified for the next round of competitions.

Preferably, the current detection module is a current transformer with a magnetic ring inside, the load loop is connected to the wire inlet terminal, penetrates through the center of a coil of the current transformer, passes through two output pins of the magnetic latching relay and then is connected to the wire outlet terminal, and the two coil pins of the current transformer are connected to the control module.

Preferably, the surface of the magnetic latching relay is provided with a manual deflector rod, and the module shell is provided with a manual operation hole corresponding to the position of the manual deflector rod.

Preferably, the setting and indicating module is arranged on the surface of the shell and comprises a digital dial switch, the digital dial switch is electrically connected with the control module and is used for setting a protection current value through dial codes, and the outer shell corresponds to the stay position of the dial switch and is marked with a numerical value.

Preferably, the control module comprises a communication unit and an instruction unit connected with the communication unit, wherein an external remote control signal is transmitted to the instruction unit through the communication unit, and a relay driving unit is connected with the instruction unit and is connected to a control pin of the magnetic latching relay.

Preferably, a two-position communication connection terminal and a programming button are arranged on the shell, an external remote control signal is connected to the communication unit through the communication connection terminal on the shell, the communication unit is provided with two direct current power supply output pins, one output pin outputs a first direct current power supply to supply power to the command unit, the other output pin outputs a second direct current power supply to supply power to the relay driving unit, the voltage of the second direct current power supply is higher than that of the first direct current power supply, and the programming button is connected to the command unit and used for downloading the application program of the control module.

Preferably, the surface of the housing is further provided with a test button and a test indicator light connected to the command unit, the button being used for starting the leakage test function, the indicator light being used for indicating the leakage state.

Preferably, the number of the wire inlet terminals in the shell is 2N, the number of the wire outlet terminals is 2N, the number of the current transformers is 2N, the number of the magnetic latching relays is N, two groups of output pins are arranged in the shell of the magnetic latching relay and are respectively connected into loops between two adjacent wire inlet terminals and wire outlet terminals, and the two groups of output pins are controlled by the same coil in the magnetic latching relay and are simultaneously opened and closed.

Because the bimetallic strip is canceled, a current transformer which is not affected by temperature is used as a detection means of an overload protection current value, the realization of an overload protection function is not affected by temperature any more, and meanwhile, because the shell is provided with the two-bit communication wiring terminals, when faults such as overload and the like occur on a circuit, remote fault alarm can be realized through a bus.

Drawings

FIG. 1 is a sectional view of an axial step shaft according to a first embodiment of the present utility model;

FIG. 2 is an isometric view of a first embodiment;

FIG. 3 is an internal schematic block diagram of the first embodiment;

FIG. 4 is a sectional view of a stepped shaft of the second embodiment;

FIG. 5 is a circuit diagram of a control module according to a second embodiment;

FIG. 6 is a top view of a second embodiment;

FIG. 7 is an internal schematic block diagram of the second embodiment;

FIG. 8 is a flow chart of a second embodiment of the present utility model;

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

Fig. 1, fig. 2 and fig. 3 are different views of a first embodiment of the present utility model.

The external remote control signal of the first embodiment is an EIB bus signal.

As can be seen from fig. 1, 2 and 3, the embodiment comprises a housing 1, a mechanical locking handle 2 at the top of the housing, an incoming line terminal 32, an outgoing line terminal 31, a moving and static contact group 211, an electromagnetic release 212, an arc extinguishing device 213, a current transformer 51 in the housing, a magnetic latching relay 4, a setting and indicating module 8, a programming button 9, a manual operation hole 7 and a communication connection terminal 6.

When the circuit breaker is used, the mechanical locking handle 2 is manually pulled to compress the internal elastic element for storing energy, meanwhile, the movable contact group 211 is closed, when the circuit is short-circuited, high current flows through the electromagnetic release 212, the electromagnetic release 212 is released by the instant magnetic field, the movable contact group 211 is disconnected in a loop, the mechanical locking handle 2 rotates back to the disconnected position under the action of the elastic element, and the arc extinguishing device 213 extinguishes the arc generated by the breaking circuit rapidly to play a role in protecting the circuit short-circuit.

As can be seen from fig. 1 and 3, the loop passes through the middle of the coil of the current transformer 51, when the circuit is overloaded, the coil of the current transformer 51 senses the loop current passing through the inside, the two coil feet of the current transformer 51 output the corresponding proportion of current signals, and the current signals are transmitted to the control module, and the control module is composed of a communication unit 611, an instruction unit 612 and a relay driving unit 613, wherein the instruction unit 612 receives the actual current value of the loop transmitted by the current transformer 51.

Meanwhile, as can be seen from fig. 2, the setting and indicating module 8 is composed of a digital dial switch 81, the digital dial switch 81 is connected with the instruction unit 612, different current values are set through different stay positions of the digital dial switch 81, a numerical value is identified on the housing 1 corresponding to the stay position of the dial switch, and the instruction unit 612 can read the set current value. The command unit 612 compares the set current value with the actual current value of the loop, if the actual current value is greater than the set current value, the command unit 612 outputs a pulse control signal to the relay driving unit 613 after operation, the relay driving unit 613 is provided with a power amplifying circuit, and the relay driving unit 613 drives the magnetic latching relay 4 to change the opening and closing state, so that the circuit between the wire inlet terminal 32 and the wire outlet terminal 31 is disconnected, the loop is disconnected, and the overload protection effect of the circuit is further achieved.

In actual use, in the case of identical hardware, the user can change the current protection value by setting and indicating the digital dial switch 81 of the module 8.

The above is an implementation manner of the line overload protection function of the present embodiment, and after overload protection is generated in the loop of the present embodiment, the remote alarm function is implemented as follows.

As can be seen from fig. 1, 2 and 3, in this embodiment, a two-bit communication terminal 6 is provided on the housing 1, and the two-bit communication terminal 6 is a red-black terminal of an international standard EIB bus.

The external bus signal is transmitted to the command unit 612 through the communication terminal 6 and the communication unit 611, the command unit 612 is connected to the relay driving unit 613, the two control pins of the magnetic latching relay 4 are connected to the relay driving unit 613, when overload protection occurs to the circuit, the command unit 612 sends a control signal to control the magnetic latching relay 4 to disconnect the loop, and meanwhile, the control signal is transmitted to the communication unit 611, and the communication unit 611 outputs a status signal to the external bus through the communication terminal 6, so that a remote device on the bus can know that the magnetic latching relay in the loop is in an off state and is in an overload protection state. Therefore, the remote fault alarming function is realized after the overload protection of the loop.

In addition to the communication decoding, the communication unit 611 of the first embodiment has two power output pins, in which the first dc power output pin 616 supplies power to the command unit 612, the second dc power output pin 615 supplies power to the relay driving unit 613, and the voltage of the second power output pin 615 is higher than that of the first power output pin 616. The communication unit 611 is internally provided with a multistage DC-DC power supply structure, so that communication decoding can be completed, different DC voltages can be provided, the internal structure is greatly simplified, and the reliability is improved.

In use, if the control bus fails, or in case of emergency, a manual control loop is needed to be opened and closed, see fig. 1 and 2, a manual operation hole 7 is formed in the shell 1, a manual deflector rod for controlling the opening and closing of the output pin of the relay is arranged on the shell of the magnetic latching relay 4, and in case of emergency, the manual deflector rod is operated to control the opening and closing of the relay through the manual operation hole 7 outside the shell, so that the requirement of being applicable in case of emergency is met.

As can be seen from fig. 1, a programming button 9 is provided on the housing 1 for starting the download control program, the programming button 9 being connected to the command unit 612. Touching programming button 9 can download an application program over the bus to internal instruction unit 612.

According to the embodiment, a bimetallic strip is eliminated, a current transformer is used for detecting the actual current of a loop, a protection current value set by a user through a setting and display module is read, after the two values are compared with each other, the loop is disconnected through the command unit for judging and controlling the magnetic latching relay, so that an overload protection function which is not affected by temperature is realized, meanwhile, a fault signal is transmitted to a bus, and a remote fault alarm function is realized.

Example two

FIG. 4 is a sectional view of a stepped shaft of the second embodiment;

FIG. 5 is a circuit diagram of a control module according to a second embodiment;

FIG. 6 is a top view of a second embodiment;

FIG. 7 is an internal schematic block diagram of the second embodiment;

fig. 8 is a schematic workflow diagram of a second embodiment of the present utility model.

The working principle of the embodiment is the same as that of the first embodiment, and the working principle of the embodiment is characterized in that: the surface of the shell is provided with a test button and a test indicator lamp, a plurality of wire inlet and outlet terminals, a plurality of current transformers and a magnetic latching relay are arranged in the shell, and a plurality of loop switching and protecting functions can be realized in one shell.

As can be seen from fig. 4, 6 and 7, the embodiment comprises a housing 1, a mechanical locking handle 2 at the top of the housing, 2 wire inlet terminals in the housing, a wire inlet terminal 320 of a circuit a and a wire inlet terminal 321 of a circuit B in the housing; the number of the outgoing terminals is 2, the number of the outgoing terminals 310 of the loop A and the number of the outgoing terminals 311 of the loop B are 2, the number of the current transformers is 510 of the loop A, and the number of the current transformers is 52 of the loop B; one of the magnetic latching relays, the magnetic latching relay 4, there is a manual deflector 41 on the magnetic latching relay 4, see fig. 5, the magnetic latching relay described in fig. 7 has two sets of output pins in the shell, the two sets of output pins are connected between the inlet wire and outlet wire terminals of the loop a and the loop a respectively, the two sets of output pins of the magnetic latching relay are controlled by the same coil in the magnetic latching relay, and are opened and closed at the same time.

The shell is also internally provided with a loop A moving and static contact group 214, a loop B moving and static contact group 215, an electromagnetic release 212, an arc extinguishing device 213, a setting and indicating module 8, a programming button 9, a manual operation hole 7, a communication wiring terminal 6, a test button 92 and a test indicator lamp 91.

As can be seen from fig. 6 and 7, two circuits are installed in one housing 1, wherein only circuit B is connected with an electromagnetic release 212, and the magnetic latching relay 4 is provided with two groups of output pins for respectively controlling the circuit a and the circuit B to be opened and closed simultaneously.

When the circuit is in short circuit, a large current flows through the electromagnetic release 212, the electromagnetic release 212 is released by an instantaneous magnetic field, the moving and static contact group 215 breaks the circuit, the mechanical locking handle 2 driven by the tripping mechanism rotates back to the breaking position under the action of the elastic element, meanwhile, the moving and static contact group 214 is driven to break the circuit, and an arc generated when the moving and static contact group 215 of the circuit B is broken is rapidly extinguished by the arc extinguishing device 213, so that the circuit short circuit protection function is realized.

As can be seen from fig. 4, 6 and 7, the loop a passes through the middle of the coil of the loop a current transformer 510, the loop B passes through the middle of the coil of the loop B current transformer 52, when the loop a line is overloaded, the coil of the loop a current transformer 510 senses the loop current passing through the inside, the two coil feet output feet of the loop a current transformer 510 output current signals with corresponding proportions, and the current signals are transmitted to the control module 620, the control module 620 is composed of the communication unit 611, the command unit 612 and the relay driving unit 613, and the command unit 612 receives the loop a current transformer 510 and the transmitted loop actual current value. Meanwhile, as can be seen from fig. 4, the setting and indicating module 8, which includes a digital dial switch, is connected to the control module 620, and sets different current values through different stay positions of the dial switch, and the instruction unit 612 can read the set current values. The command unit 612 compares the set current value with the actual current value of the loop, if the actual current value is greater than the set current value, the command unit 612 outputs signals to the relay driving unit 613 after operation, so as to drive the magnetic latching relay 4 and the two pairs of contacts of the magnetic latching relay 4, and the two loops of the loop A and the loop B are simultaneously opened under the action of the coil, thereby playing a role in protecting the overload of the loop.

When the circuit B is overloaded, the coil of the current transformer 52 senses the loop current passing through the inside, and outputs current signals with corresponding proportion to the two coil pin output pins of the current transformer 52, and transmits the current signals to the control module 620, and the control module 620 also reads the protection current value set by the setting and indicating module 8, and performs protection after comparison.

In addition to the communication decoding, the communication unit 611 of the second embodiment has two power output pins, in which the first dc power output pin 616 supplies power to the command unit 612, the second dc power output pin 615 supplies power to the relay driving unit 613, and the voltage of the second power output pin 615 is higher than that of the first power output pin 616.

In the magnetic latching relay 4 of embodiment 2, two groups of output pins are built in to operate simultaneously, the opening and closing of the loop A and the loop B are controlled respectively, the loop A current transformer 51 and the loop B current transformer 52 are connected to the instruction unit 612, the instruction unit 612 receives the current values transmitted by the loop A current transformer and the loop B current transformer, in use, two groups of incoming wires and outgoing terminals are connected to the live wire and the zero wire of the same electrical equipment respectively, besides the overload protection function of the loop is realized, meanwhile, the current difference values of the two loops are compared in real time, and when the current difference value of the two loops flowing through is detected to be larger than a certain value, for example, 30mA, the instruction unit 612 sends an instruction to drive the magnetic latching relay 4 to open the loop A and the loop B simultaneously through the relay driving unit 613, so that the leakage protection function is realized.

When the test button 91 is pressed, the test indicator 92 is turned on, and the command unit 612 performs a leakage simulation test to determine whether the magnetic latching relay 4 is normally turned off in the leakage condition.

In the second embodiment, the bimetal is eliminated, two current transformers are installed in the casing to detect the actual currents of the two loops, the set current value set by the setting module is read, after the set current value is compared with the actual current value of the loops, the instruction unit judges whether the loops are overloaded and controls the magnetic latching relay to disconnect the loops, so that the overload protection function which is not affected by temperature is realized.

The working principle can be seen from fig. 8, which is a schematic flow chart of a second embodiment of the present utility model.

SS01, setting the protection current value manually through the setting and indicating module;

SS02, obtaining a set protection current value control module through the setting module;

SS03, the control module calculates an overload protection current threshold value and action time according to the set protection current value and the preset load type, and stores the overload protection current threshold value and the action time;

SS04, taking real-time current values of the two loops through the transformer coil;

SS05, comparing the actual current value of the loop with the overload protection current threshold;

SS06, comparing the real-time current difference value of the two loops with the leakage threshold value;

SS07, starting timing beyond the threshold value, and comparing with the calculated action time;

SS08, after overrun, the control module controls the relay module to disconnect the load;

and SS09, after the fault is removed, a command is sent manually through a bus or a manual driving lever is manually operated to enable the relay to be closed.

The foregoing description is only a preferred embodiment of the present utility model, and it is not intended to limit the scope of the claims herein, so that the current transformer is replaced by a hall current transformer according to the equivalent changes of the claims herein; the remote control protocol is replaced by RS485, DALI, CAN BUS or is changed into wireless transmission such as graffiti, bluetooth and the like; modifications such as 4, 6, 8, multiple loops, etc. within a single housing are within the scope of the present utility model.

Claims (8)

1. An intelligent air circuit breaker, comprising: casing, mechanical locking handle at casing top, inlet wire terminal, sound contact group, electromagnetic release, arc extinguishing device and the terminal of being qualified for next round of competitions in the casing, its characterized in that: the magnetic latching relay is characterized in that a current detection module, a magnetic latching relay and a control module are further arranged in the shell, a setting and indicating module is arranged on the surface of the shell, two output pins of the magnetic latching relay are connected in series between the wire inlet terminal and the wire outlet terminal, the control module is connected with the control pin of the magnetic latching relay, a setting and indicating module for setting a protection current value is connected to the control module and used for transmitting the set current value to the control module, and the current detection module detects load loop current between the wire inlet terminal and the wire outlet terminal and transmits the load loop current to the control module.

2. The intelligent air circuit breaker according to claim 1, wherein: the current detection module is a current transformer with a magnetic ring inside, the load loop is connected to the incoming line terminal, penetrates through the center of a coil of the current transformer, passes through two output pins of the magnetic latching relay and then is connected to the outgoing line terminal, and the two coil pins of the current transformer are connected to the control module.

3. The intelligent air circuit breaker according to claim 2, wherein: the surface of the magnetic latching relay is provided with a manual deflector rod, and a manual operation hole is formed in the module shell corresponding to the position of the manual deflector rod.

4. The intelligent air circuit breaker according to claim 2, wherein: the setting and indicating module is arranged on the surface of the shell and comprises a digital dial switch, the digital dial switch is electrically connected with the control module and is used for setting a protection current value through dial, and the outer shell corresponds to the stay position of the dial switch and is marked with a numerical value.

5. The intelligent air circuit breaker according to claim 1, wherein: the control module comprises a communication unit and an instruction unit connected with the communication unit, wherein an external remote control signal is transmitted to the instruction unit through the communication unit, a relay driving unit is connected with the instruction unit, and the relay driving unit is connected to a control pin of the magnetic latching relay.

6. The intelligent air circuit breaker according to claim 5, wherein: the shell is provided with a two-position communication connecting terminal and a programming button, an external remote control signal is connected to the communication unit through the communication connecting terminal on the shell, the communication unit is provided with two direct current power supply output pins, one output pin outputs a first direct current power supply to supply power to the command unit, the other output pin outputs a second direct current power supply to supply power to the relay driving unit, the voltage of the second direct current power supply is higher than that of the first direct current power supply, and the programming button is connected to the command unit and is used for downloading the application program of the control module.

7. The intelligent air circuit breaker according to claim 2, wherein a test button and a test indicator lamp are further provided on a surface of the housing, the test button being connected to the command unit, the button being for activating the leakage test function, the indicator lamp being for indicating the leakage state.

8. The intelligent air circuit breaker according to claim 7, wherein: the number of the wire inlet terminals is 2N, the number of the wire outlet terminals is 2N, the number of the current transformers is 2N, the number of the magnetic latching relays is N, the shell of the magnetic latching relay is internally provided with output pins, two groups of output pins are respectively connected into loops between two adjacent wire inlet terminals and wire outlet terminals, and the two groups of output pins are controlled by the same coil in the magnetic latching relay and are simultaneously opened and closed.

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