CN101425431A - Circuit breaker with remote control function - Google Patents

Abstract

The present invention is a circuit breaker with a remote control function, which includes: a first circuit breaker unit for realizing the connection and disconnection of the load and the power line under normal conditions; a remote circuit breaker control unit for controlling the circuit breaker's circuit breaking action through a remote control signal; and a box body made of an insulating flame-retardant material, wherein the first circuit breaker unit and the remote circuit breaker control unit are arranged in the box body.

Description

Circuit breakers with remote control

technical field

The invention relates to a circuit breaker, in particular to a circuit breaker capable of realizing the breaking action of the circuit breaker through remote control.

Background technique

For the power department, the switch and breaker equipment is an essential equipment to ensure the safety of electricity use and to switch lines. The internal structure of the existing circuit breaker is shown in Figure 1, which includes: a box body 001, which uses insulation resistance It is made of combustible materials, and has the following structure inside:

A live wire access port 032 and a live wire output port 037 are used to connect to the power line; an action mechanism includes: a handle 021, which has an operating end arranged outside the box body 001 to perform circuit On-off control; a movable contact piece 024, with a movable contact 025 at its end; a linkage control block group 022, which is composed of a plurality of linkage parts, which are rotated by the shaft arranged in the box body 001, and the uppermost linkage One end of the piece 0221 is connected with the handle 021, and the end of the lowermost linkage piece 0222 is connected with the front end 023 of the moving contact piece; a static contact 031 is connected with the live wire input terminal 032 , when the handle 021 is turned to pull the linkage control block group 022, the moving contact piece 024 moves back and forth, realizing the contact and separation of the moving contact point 025 and the static contact point 031, and finally achieving the purpose of on-off of the power line. It also includes: an arc extinguishing mechanism and an overcurrent protection mechanism. The arc extinguishing mechanism is used to eliminate the damage of the arc to the circuit breaker. It includes a metal plate 033 and an arc extinguishing cover 035. The metal plate 033 It is connected with the static contact 031 and extends to the bottom of the box body 001 , and the arc extinguishing cover 035 corresponds to the static contact 031 . The overcurrent protection mechanism is an electromagnetic release 051, which is arranged at the lower part of the action mechanism, one end of which is connected to the upper end 023 of the moving contact piece, and the other end is connected to one end of a linkage 052 , the other end of the linkage 052 is connected to the linkage control block group 022, and when the power line overcurrent occurs, the moving and static contacts are separated, and the load is disconnected from the power line.

However, with the continuous improvement of people's requirements for power safety and control, it is difficult for existing circuit breakers to meet this requirement. After analysis, it still has the following defects:

First of all, with the continuous advancement of communication technology, the power sector urgently needs remote control methods for power management. How to cut off the power supply of designated users through remote control and implement remote supervision is also a feature that existing products do not have. When the circuit breaker is required to disconnect the load from the power line due to some reason (arrears, etc.), the staff must arrive at the power consumption site in person to handle it, which is very inefficient.

Secondly, after long-term use, there is adhesion between the internal moving contacts and static contacts of the circuit breaker, that is to say, even though the circuit breaker is disconnected in form, the internal power lines are still connected in essence. status, which poses a great security risk;

Thirdly, when the power supply of the user's electrical appliance is stopped, the user cannot determine whether it is a power outage problem or a circuit breaker failure. If repairs are made blindly, it will bring hidden dangers to safe use;

Finally, if the circuit breaker breaks down, the user cannot get a clear instruction, and the fault cannot be eliminated in time, which makes it difficult for the normal safe use of electricity. In view of the above-mentioned defects, the inventor of the present invention finally obtained This creation.

Contents of the invention

The object of the present invention is to provide a circuit breaker with remote control function to overcome the above-mentioned defects.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a circuit breaker with remote control function, which includes:

A first circuit breaking unit, used to realize the on-off of the load and the power line under normal conditions;

A remote circuit breaker control unit, which controls the breaking action of the circuit breaker through the remote control signal;

A box body, which is made of insulating and flame-retardant materials, and the first circuit breaker unit and the remote circuit breaker control unit are arranged in the box body.

Preferably, the first breaking unit includes:

An action mechanism to realize the on-off operation of the load and the power line by the user;

An arc extinguishing mechanism to eliminate the damage of the arc to the circuit breaker;

An over-current protection mechanism to prevent the circuit breaker from being burned due to excessive operating current;

A first phase wire connection terminal is used for connecting phase wires.

Preferably, the action mechanism includes:

A handle, which has an operating end arranged outside the box, for on-off control of the power circuit;

A first movable contact piece, the end of which has a first movable contact;

A linkage control block group, which is composed of a plurality of linkage control blocks connected in two through hinges, one end of a first linkage control block is connected to the handle, and one end of an end linkage control block is connected to the second linkage control block The front end of a moving contact piece is connected;

A first static contact, which is connected to the first phase line connection terminal.

Preferably, the overcurrent protection mechanism is an electromagnetic tripper, which is arranged at the lower part of the action mechanism, one end of which is connected to the first moving contact piece, and the other end is connected to one end of a linkage The other end of the linkage is connected to a supporting linkage in the linkage control block group, and when the power line is over-current, the moving and static contacts are separated, and the load is disconnected from the power line.

Preferably, the remote circuit breaker control unit includes:

A circuit breaking actuator, used to realize the action of cutting off the power line;

An execution control circuit, which is connected with the disconnection actuator and controls the action of the disconnection actuator.

Preferably, the circuit breaker actuator includes:

A first electromagnet and a first armature, the first armature is arranged at the lower end of the linkage member, and one end of the electromagnet corresponds to the position of the first armature.

Preferably, the execution control circuit includes:

A power supply circuit, which is connected with the first electromagnet coil of the circuit breaker to provide power for it;

A power supply control circuit controls the on-off of the power supply circuit, thereby controlling the execution of the action of the circuit breaker actuator.

Preferably, the power supply circuit is a rectifier circuit, the output end of which is connected to the input end of the electromagnetic coil of the first electromagnet, and the input end of the rectification circuit and the output end of the electromagnetic coil are respectively It is connected with the phase line terminal and neutral line terminal of the power line output terminal.

Preferably, the power control circuit includes:

A photoelectric receiving tube, which receives the optical signal transmitted from the remote control center through an optical fiber and a socket, and one output terminal thereof is grounded;

A thyristor, the control end of which is connected to the other output end of the photoelectric receiving tube, and the other two ends of the thyristor are connected to the positive and negative poles of the rectifier circuit to control the flow of the execution control circuit. broken.

Preferably, it also includes: a feedback monitoring circuit, which includes:

A photoelectric coupler, one end of which is connected to the positive pole of the rectifier circuit, and the other end is grounded. When the power line is connected, the output end of the photoelectric coupler outputs a switch signal to the corresponding remote control device .

Preferably, it also includes: a feedback monitoring circuit, which includes:

A light-emitting diode, one end of which is connected to the positive pole of the rectifier circuit, and the other end is grounded. When the power line is connected, the output end of the light-emitting diode outputs an optical signal, which is transmitted to the corresponding through the optical fiber and the socket. remote control device.

Preferably, it also includes:

A remote control signal receiving circuit for receiving external wireless control signals;

A decoding circuit, which is connected to the remote control signal receiving circuit to obtain a corresponding digital control signal;

A decoding circuit analyzes and converts the digital control signal into a voltage signal and outputs it to the power supply control circuit.

Preferably, it also includes a secondary protection circuit breaking unit. When the first circuit breaking unit fails to cut off the load and the power line, the load of the secondary protection circuit breaking unit is automatically disconnected from the power line. include:

A detection circuit, used to detect whether the first breaking unit fails when performing power line breaking operation;

A secondary disconnection actuator, when the detection circuit detects that the first disconnection unit fails to perform the disconnection operation of the power line, the load is automatically disconnected from the power line.

Preferably, the detection circuit includes:

A tact switch, which is arranged at the lower part of the handle, and one end of which is connected to a terminal on the first movable contact piece through a wire;

An electromagnet, which is arranged on a bracket in the box body, the electromagnetic coil input end of the electromagnet is connected with the above-mentioned wire, and its output end is connected with a zero line terminal line; when the handle of the first circuit breaking unit When turning to the disconnected position, the tact switch is closed, and if the phase line is not disconnected, a current flows into the coil of the electromagnet, causing the electromagnet to act.

Preferably, the secondary circuit breaker actuator includes:

A secondary breaking action mechanism, which includes:

An overturning frame, the overturning frame rotates around a twisted shaft, the ejection end of the iron core leans against one side of the overturning frame, and it also has an overlapping surface;

A turning plate, which rotates around the hinge shaft in the middle, and one end of the turning plate is overlapped on the overlapping surface;

A moving contact assembly, which is arranged in the bracket in the box body, the moving contact assembly includes: a T-shaped frame with a spring on it, and one end of the T-shaped frame has a conductive contact , the other end of the T-shaped frame leans against the other end of the flip plate;

A junction frame, which is provided with a second phase line connection terminal inside, the second phase line connection terminal is connected to the phase line, and it is connected to the phase line phase of the phase line extended from the first breaking unit through two static contacts. connect;

The conductive movable contact and the two static contacts are normally closed.

Preferably, it also includes a fault status indication circuit, which includes:

An indicator light is used to indicate whether the disconnecting function of the first circuit breaking unit is invalid.

Preferably, it also includes a power line status indicating circuit, which includes:

An indicator light, which is connected to the connection terminal of the neutral line and the first phase line, is used to indicate whether the power line has voltage.

Preferably, it also includes: a power conversion circuit, which transforms the power line voltage to provide power for the fault state indicating circuit and the power line state indicating circuit.

Preferably, it also includes an overvoltage protection unit, which is used to output a control signal to automatically disconnect the load from the power line when an overvoltage occurs in the power line;

It includes: a voltage signal sampling circuit, which is connected to the anode of the rectification circuit to obtain the voltage value of the power line;

An overvoltage judgment circuit, which includes a comparator, the output terminal of the voltage signal sampling circuit is connected to the non-inverting input terminal of the comparator, and a reference voltage is set at the inverting input terminal of the comparator, so The output terminal of the comparator is connected with the control terminal of the thyristor. When the comparator outputs a control signal due to excessive voltage at the non-inverting input terminal, the circuit breaker actuator is activated, and the load is automatically connected to the power line circuit. disconnect.

Preferably, it also includes: an overvoltage adjustment circuit, used to adjust the maximum allowable voltage.

Preferably, the overvoltage adjustment circuit is a sliding rheostat, which is set between the non-inverting input terminal of the comparator and ground;

Or a sliding rheostat is provided between the inverting input terminal of the comparator and the ground.

Preferably, the overvoltage judging circuit includes: an analog/digital converter and a processor, the anode of the rectification circuit is connected to the input terminal of the analog/digital converter, and the analog/digital converter The output terminal of the digital converter is connected with the input phase of the processor, the processor is set with a threshold, and the processor controls the conduction of the thyristor.

Preferably, the entire box body is made of transparent insulating and flame-retardant materials.

Preferably, the upper part of the box corresponding to the position of the static contact is made of transparent insulating flame-retardant material.

Preferably, both the first movable contact and the first static contact are provided with a fluorescent coating.

Compared with the prior art, the present invention has another effect:

First of all, remote control is set up, so that the power department can remotely supply and cut off the power consumption of power users, which reduces manpower consumption and reduces the cost of power consumption management. At the same time, the method of photoelectric isolation is adopted to ensure the safety of life;

Secondly, due to the addition of the secondary protection breaking unit, even if there is adhesion between the internal moving contact and the static contact of the circuit breaker, the power line will be cut off by the secondary protection breaking unit, which increases safety;

Thirdly, the power line indicator light is added. When the power user has no power supply, it can clearly determine whether it is a power failure or no power supply caused by the circuit breaker itself, avoiding untargeted maintenance;

Finally, a circuit breaker fault indicator light is added, which can indicate in time when the breaker function of the circuit breaker fails, reducing potential safety hazards.

Description of drawings

FIG. 1 is a schematic diagram of the internal structure of a circuit breaker in the prior art;

Fig. 2 is a schematic diagram of the internal structure of Embodiment 1 of the circuit breaker with remote control function of the present invention;

Fig. 3 is a schematic diagram of the internal structure of Embodiment 2 of the circuit breaker with remote control function of the present invention;

Fig. 4 is the circuit diagram 1 of embodiment 3 of the circuit breaker with remote control function according to the present invention;

Fig. 5 is the circuit diagram 2 of the third embodiment of the circuit breaker with remote control function according to the present invention;

Fig. 6 is the third circuit diagram of the third embodiment of the circuit breaker with remote control function according to the present invention.

Detailed ways

The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

Please refer to Figure 2, which is a schematic diagram of an internal structure of a circuit breaker with a remote control function according to the present invention, which is described for a single chip (only one action mechanism, responsible for the on-off of one phase line), for In terms of three phases, it can be realized by using them in combination, which includes: a box body 001, made of insulating and flame-retardant materials, with the following structure inside:

The first circuit breaking unit is used to realize the on-off of the phase wire circuit in the normal state. The first circuit breaking unit includes: an action mechanism to realize the user’s on-off operation of the load and the power line; an arc extinguishing mechanism for To eliminate arc damage to the circuit breaker; an overcurrent protection mechanism to prevent the circuit breaker from being burned due to excessive operating current; a first phase line connection terminal 032, which is used to connect the phase line 042;

The action mechanism includes: a handle 021, which has an operating end arranged outside the box body 001, and performs on-off switching of the power circuit through rotation; a first movable contact piece 024, whose end has a first A moving contact 025; a linkage control block group 022, which is composed of a plurality of linkages, which are rotated through the shaft arranged in the box body 001, and one end of the uppermost linkage is connected with the handle, and the last The end of the linkage below is connected with the front end of the first moving contact piece 024; a first static contact 031 is connected with the first phase connection terminal 032; when the handle is turned to pull the The action of the linkage control block group causes the first moving contact piece 024 to move back and forth, realizes the contact and separation of the first moving contact 025 and the first static contact 031, and finally achieves the purpose of connecting and disconnecting the load and the power line;

It should be noted that in order to increase the reliability of the circuit breaker, so that users can clearly see the opening and closing actions of the first movable contact 025 and the first static contact 031, the upper part of the box body 001 and the first static contact The position corresponding to the contact 031 is made of transparent insulating flame-retardant material, and the first movable contact 025 and the first static contact 031 are provided with a fluorescent coating, so that the user can observe the movable and static contacts contact situation.

The over-current protection mechanism is an electromagnetic tripper 051, which is arranged at the lower part of the action mechanism, one end of which is connected to the first moving contact piece 024, and the other end of which leans against a link 052. At the end, the other end of the linkage 052 is overlapped with one of the supporting linkages 0224 of the linkage control block group 022. When an overcurrent occurs in the power line, the front end of the electromagnetic release 051 will The first movable contact piece 024 is pulled back, and the front end of the electromagnetic tripper 051 pushes the linkage piece 052 to rotate around an axis, causing the support linkage piece 024 in the linkage control block group to connect with the linkage piece 052. The linkage is separated, causing the circuit breaker to separate the first moving contact 025 and the first static contact 031, and the load is disconnected from the power line;

The arc extinguishing mechanism is used to eliminate arc damage to the circuit breaker, which includes a metal plate 033 and an arc extinguishing cover 035, the metal plate 033 is connected with the first static contact 031 and extends to The bottom of the box body 001, the arc extinguishing cover 035 corresponds to the first static contact 031;

This embodiment also has the function of disconnecting the circuit breaker by remote control, that is, the circuit breaker generates a circuit breaker action through a remote signal, thereby realizing the action of cutting off the load and the power line; only when the circuit breaker signal is canceled at the remote control center can the circuit breaker Closed, for this reason a remote circuit breaker control unit is provided in the described box body (please combine the circuit diagram shown in Figure 4), which includes:

A circuit breaker, used to realize the action of cutting off the power line, which includes: a first electromagnet 080, which is arranged on a bracket in the box body 001, and is located below the electromagnetic tripper 051. There is an iron core, and one end of the iron core abuts against the lower end of the linkage 052;

An execution control circuit, which is connected with the circuit breaker actuator, and controls the action of the circuit breaker actuator; it includes: a power supply circuit, which is connected with the circuit breaker actuator, and provides power for it;

A power supply control circuit, which controls the on-off of the power supply circuit, thereby controlling the action execution of the circuit breaker actuator; wherein, the power supply circuit is a rectifier circuit D1-D4, and its output terminal and the first electromagnet The input end of the electromagnetic coil of 080 (TQ2) is connected, the output end of the electromagnetic coil of the first electromagnet 080 (TQ2) is connected to the neutral line terminal, and the input end of the rectifier circuit D1-D4 is connected to the The phase lines mentioned above are connected;

The power control circuit includes: a first photocoupler IC2, used to transmit control signals, one output end of which is connected to the anodes of the rectification circuits D1-D4; a thyristor SCR, whose control end is connected to the anode of the rectification circuit The other output terminal of the first optocoupler IC2 is connected, and the other two ends of the thyristor SCR are connected with the positive and negative poles of the rectifier circuit D1-D4 to control the on-off of the execution control circuit;

Its working process is: the control signal is continuously applied to the signal input end of the first photocoupler IC2, and a high potential is generated at the output end of the first photocoupler IC2, thereby turning on the thyristor SCR, Thus, the electromagnetic coil of the first electromagnet 080 (TQ2) has a current flowing through it, and then the first electromagnet 080 (TQ2) is activated to push the linkage 052 so that it goes around an axis The rotation causes the support linkage 0224 in the linkage control block group 022 to separate from the linkage 052, causing the circuit breaker to separate the first moving contact 025 from the first static contact 031, and the power line is disconnected ; Due to the existence of the return spring 026, this disconnected state can be restored, but only if there is no signal input at the signal input terminal of the first photocoupler IC2, can it be closed.

In order to realize effective monitoring to the result of remote control, the present invention also provides a feedback circuit, transmits the on-off information of power line to the remote control center, and described feedback circuit comprises: a second photocoupler IC3, one end of which is connected to The anodes of the rectifier circuits D1-D4 are connected to each other, and the other end is grounded. When the power line is not disconnected and there is still a voltage, a signal is output at the output end of the second photocoupler IC3, which is passed through the signal line 041 , Signal socket 044 to the corresponding remote control control center.

In order to adapt to the above-mentioned remote control, there should also be a remote control signal receiving circuit for receiving external wireless control signals; a decoding circuit, which is connected with the remote control signal receiving circuit to obtain the corresponding digital control signal ; A decoding circuit, which analyzes and converts the digital control signal into a voltage signal and outputs it to the power supply control circuit.

In order to adapt to the above-mentioned remote control, there should also be a remote control signal receiving circuit for receiving external wireless control signals; a decoding circuit, which is connected with the remote control signal receiving circuit to obtain the corresponding digital control signal ; A decoding circuit, which analyzes and converts the digital control signal into a voltage signal and outputs it to the power supply control circuit.

Please refer to Figure 3, which is a schematic diagram of the internal structure of the second embodiment of the circuit breaker with remote control function of the present invention. function, that is to say, when the breaking function of the first breaking unit breaks down, the secondary protective breaking unit of the present invention acts to immediately disconnect the load from the power line, wherein the secondary protective breaking unit is connected to the The first circuit breaking unit is located on the same side of the box body 001, of course, it can also be on the opposite side (two pieces). This embodiment takes the open side as an example. , the secondary protective circuit breaker located on the same side of the box body 001 automatically disconnects the load from the power line; the secondary protective circuit breaker includes: a detection circuit and a secondary circuit breaker actuator, wherein ,

The detection circuit is used to detect whether the first breaking unit fails when performing power line breaking operation; it includes:

A tact switch 072, which is arranged on the lower part of the handle 021, and one end of which is connected to the first movable contact piece through a wire (not shown in the figure);

An electromagnet 066, which is arranged on a bracket 011 in the box body, the electromagnetic coil input end of the electromagnet is connected with the above-mentioned wire, and its output end is connected with a neutral line terminal line; when the first circuit breaking unit When the handle 021 of the handle 021 is rotated to the disconnection position, the tact switch 072 is closed, and if the phase line is not disconnected, a current enters the coil of the electromagnet 066 through the first movable contact piece 024 , causing the action of the electromagnet 066;

The secondary circuit breaking actuator, when the detection circuit detects that the first circuit breaking unit fails to perform the power line circuit breaking operation, automatically disconnects the load from the power line; it includes:

An overturning frame 065, the overturning frame 065 rotates around a twisted shaft, the ejection end of the iron core leans against one side of the overturning frame 065, and the overturning frame 065 also has an overlapping surface;

A turning plate 064, which rotates around the middle hinged shaft, and one end of the turning plate 064 is overlapped on the overlapping surface;

A moving contact assembly is arranged in the bracket 062 in the box body. The moving contact assembly has a T-shaped frame 061 with a spring 063 on it. One end of the T-shaped frame 061 has a conductive Contact, the other end of the T-shaped frame 061 leans against the other end of the flip plate 064, and the normal spring 063 is in a compressed state;

A junction frame, inside of which is a second phase line connection terminal 037, the second phase line connection terminal 037 is connected to the phase line 043, which is extended from the first breaking unit through two static contacts The phase lines are connected;

The conduction movable contact and the two static contacts are normally closed; when the detection circuit detects that the power-off processing of the first breaking unit of the circuit is not successful (the first movable contact point 025 and the first static contact 031 are not separated), the coil of the electromagnet 066 of the detection circuit has a current flowing through it, thereby causing the core to move, the reversing frame 065 is pressed by the core, and then the The overturning frame 065 rotates around the axis, causing one end of the overturning plate 064 to separate from the overlapping surface of the overturning frame 065, so that the T-shaped frame 061 in the moving contact assembly is moved up under the action of the spring 063 Move, so that the conduction contact is separated from the two static contacts, and the phase line 042 is disconnected from the phase line 043. The disconnection action of this secondary protection is mandatory and cannot be restored.

In order to enable the user to clearly know the fault situation when the disconnection processing of the first circuit breaking unit fails, a fault state indication circuit (please combine the circuit diagram shown in Figure 4 or Figure 5) is added, which includes:

A first indicator light 071 (LED2), used to indicate whether the disconnection function of the first circuit breaking unit is invalid;

In order to indicate whether the user's power supply stop is caused by the failure of the circuit breaker itself or the power failure, a power line status indicating circuit is added, which includes a second indicator light 032 (LED1), which is connected to the neutral line and the first phase line Connect terminal 042 (phase line access end), of course, if you use the same indicator light as a neon bulb, you can install it directly without voltage transformation. If the bulb has requirements on the voltage level; Transforming the power line voltage to provide power for the fault state indicating circuit and the power line state indicating circuit is a relatively simple circuit for those skilled in the art, and will not be repeated here.

Please refer to Figure 4, which is the circuit diagram 1 of the third embodiment of the circuit breaker with remote control function of the present invention. Compared with the above-mentioned embodiment, an overvoltage protection unit is added to prevent excessive When the voltage is low, the control signal is output, and the load is disconnected from the power line;

It includes: a voltage signal sampling circuit, which is connected to the anodes of the rectification circuit D1-D4 to obtain the voltage value of the power line, which includes two series connected resistors R5 and R6, and the voltage sampling point is The middle of the two resistors R5 and R6;

An overvoltage judgment circuit, which includes a comparator IC1, the output terminal of the voltage signal sampling circuit is connected to the non-inverting input terminal of the comparator IC1, and a reference is set at the inverting input terminal of the comparator IC1 Voltage, the reference voltage is obtained from the anode of the rectifier circuit D1-D4 by the voltage stabilizing circuit, the voltage stabilizing circuit includes: a voltage stabilizing diode WD and a capacitor C1 connected in parallel with it, which is the The comparator IC1 described above provides a stable working voltage, and the output terminal of the comparator IC1 is connected to the control terminal of the thyristor SCR. In order to prevent the reverse current from damaging the comparator IC1, between the two A diode D6 is added, and when the voltage at the non-inverting input terminal of the comparator IC1 is too large, it outputs a high potential signal, thereby turning on the thyristor SCR and making the first electromagnet TQ2 The electromagnetic coil of (080) has electric current flowing through, thereby makes described first electromagnet TQ2 (080) action, pushes described linkage 052, makes it rotate around the axis, causes described linkage control block group 022 The middle support linkage 0224 is separated from the linkage 052, so that the circuit breaker separates the first moving contact 025 from the first static contact 031, and the load is disconnected from the power line. Due to the existence of the return spring 026, This open circuit state can be restored, but only if there is no overvoltage problem in the power line, it can be restored to closure.

Of course, the protection of the overvoltage phenomenon depends on the ability of the electric equipment to withstand the high voltage. In order to allow the user to set the overvoltage limit and adapt to the actual needs of the power consumption situation, this embodiment also includes an overvoltage adjustment circuit. It is used to adjust the maximum allowable voltage; the overvoltage adjustment circuit is a sliding rheostat W1, which is set between the non-inverting input terminal of the comparator IC1 and the ground; Between the inverting input terminal of the above-mentioned comparator IC1 and the ground (not shown in the figure), the voltage value entering the positive-phase and inverting input terminals of the comparator IC1 is adjusted by adjusting the resistance value to adjust the comparator When IC1 outputs a high potential, finally adjust the overvoltage value;

Of course, in order to meet the needs of remote control in the future, there may also be other overvoltage judging circuit modes (not shown in the figure), and an embodiment is given below, which includes: an analog/digital converter and a processor, the described The anodes of the rectification circuits D1-D4 are connected to the input end of the analog/digital converter, the output end of the analog/digital converter is connected to the input end of the processor, and the processor internal A threshold is preset. When an overvoltage phenomenon occurs in the power line, the processor controls the conduction of the thyristor SCR to complete the processing action of cutting off the power line. Of course, there is no need for an overvoltage adjustment circuit. By setting the threshold in the processor Voltage can achieve this adjustment.

Please refer to Figure 5, which is the circuit diagram 2 of the third embodiment of the circuit breaker with remote control function according to the present invention. The difference between it and the circuit diagram 1 lies in the circuit settings of the power control circuit and the feedback circuit of the remote circuit breaker control unit. The purpose of such setting is to prevent the circuit device described in the present invention from being maliciously damaged by the external control signal input terminal during use, so that the remote control of the circuit breaker cannot be disconnected. The power supply of the remote circuit breaker control unit control circuit, which includes:

A first optocoupler 1IC2, used to transmit control signals, one output end of which is connected to a capacitor 1C2; a thyristor 1SCR, whose control end is connected to the other output end of the first optocoupler 1IC2, for To prevent reverse current from damaging the first photocoupler 1IC2, a diode 1D5 is added, and the other two ends of the thyristor 1SCR are connected to the positive and negative poles of the rectifier circuit 1D1-1D4 to control On-off of the execution control circuit;

Its working process is: when the control signal is continuously set at the signal input terminal of the first photocoupler 1IC2, its output terminal 4 is always at low potential, then no remote disconnection control is generated at this time, when the control terminal If there is no signal input from C, the output terminal 4 is at a high potential, and the thyristor 1SCR is turned on, so that the electromagnetic coil of the first electromagnet 1TQ2 (080) has a current flowing through it, so that its internal iron core Action, pushing the linkage 052 to make it rotate around the axis, causing the support linkage 0224 in the linkage control block group 022 to separate from the linkage 052, causing the circuit breaker to separate the dynamic and static The contacts are separated to complete the disconnection of the load from the power line. Due to the existence of the return spring 026, this disconnection state can be restored, but the premise is that the signal input terminal of the first photocoupler 1IC2 continues to have a continuous signal input. able to close it. If someone destroys the input terminal of the remote control, the signal input terminal of the first photocoupler 1IC2 has no continuous voltage input, and the natural circuit breaker acts to cut off the circuit;

Correspondingly, a delay circuit is added on the basis of circuit diagram 1, which is connected to pin 1 of the second photocoupler 1IC3 by setting a resistor 1R7, and its other end is connected to the first photoelectric coupler 1IC3. The 4 pins of the coupler 1IC2 are connected and connected in series with the capacitor 1C2 to produce a delay effect, so as to avoid the problem of malfunction before the remote control signal arrives under normal conditions.

Please refer to Fig. 6, which is the circuit diagram 3 of the third embodiment of the circuit breaker with remote control function according to the present invention. The difference between it and the embodiment shown in Fig. 5 is that the power control circuit and the feedback signal are different. Wherein, the power control circuit includes:

A photoelectric receiving tube 2Q1, which receives the optical signal transmitted from the remote control center through an optical fiber and socket, and one output terminal thereof is grounded;

A thyristor 2SCR, the control end of which is connected to the other output end of the photoelectric receiving transistor 2Q1, and the other two ends of the thyristor 2SCR are connected to the positive and negative poles of the rectifier circuit 2D1-2D4 to control the Describe the on-off of the executive control circuit.

The feedback monitoring circuit, which includes:

A light-emitting diode 2LED, one end of which is connected to the anode of the rectifier circuit 2D1-2D2, and its other end is grounded. When the power line is connected, the output end of the light-emitting diode 2LED outputs a light signal, which is passed through the optical fiber and The sockets are transmitted to the corresponding remote control. Of course, it still includes a delay circuit by setting a resistor 2R7, one end of which is connected to one end of the light-emitting diode 2LED, the other end is connected to the other end of the photoelectric receiving tube 2Q1, and is connected to the capacitor 2C2 The series connection produces a delay effect, which avoids the problem of malfunction before the remote control signal arrives under normal circumstances.

The circuit breaker with remote control function of the present invention has the advantages that:

First of all, the remote control is set up, so that the power department can remotely supply and cut off the power consumption of the power users, which reduces manpower consumption and reduces the cost of power management. At the same time, the method of photoelectric isolation is adopted to avoid interference and make the action more efficient precise;

Secondly, due to the addition of the secondary protection breaking unit, even if there is adhesion between the internal moving contact and the static contact of the circuit breaker, the load will be disconnected from the power line by the secondary protection breaking unit, increasing the security;

Thirdly, the power line indicator light is added. When the power user has no power supply, it can clearly determine whether it is a power failure or no power supply caused by the circuit breaker itself, avoiding untargeted maintenance;

Finally, a circuit breaker fault indicator light is added, which can indicate in time when the breaker function of the circuit breaker fails, reducing potential safety hazards.

The above descriptions are only preferred embodiments of the present invention, and are only illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims (27)

1. A circuit breaker with remote control function, characterized in that it includes: A first circuit breaking unit, used to realize the on-off of the load and the power line under normal conditions; A remote circuit breaker control unit, which controls the breaking action of the circuit breaker through the remote control signal; A box body, which is made of insulating and flame-retardant materials, and the first circuit breaker unit and the remote circuit breaker control unit are arranged in the box body. 2. The circuit breaker with remote control function according to claim 1, wherein the first circuit breaking unit comprises: An action mechanism to realize the on-off operation of the load and the power line by the user; An arc extinguishing mechanism to eliminate the damage of the arc to the circuit breaker; An over-current protection mechanism to prevent the circuit breaker from being burned due to excessive operating current; A first phase wire connection terminal is used for connecting phase wires. 3. The circuit breaker with remote control function according to claim 2, characterized in that, the action mechanism includes: A handle, which has an operating end arranged outside the box, for on-off control of the power circuit; A first movable contact piece, the end of which has a first movable contact; A linkage control block group, which is composed of a plurality of linkage control blocks connected in two through hinges, one end of a first linkage control block is connected to the handle, and one end of an end linkage control block is connected to the second linkage control block The front end of a moving contact piece is connected; A first static contact, which is connected to the first phase line connection terminal. 4. The circuit breaker with remote control function according to claim 2, characterized in that, the overcurrent protection mechanism is an electromagnetic tripper, which is arranged at the lower part of the action mechanism, and one end thereof is connected to the The first moving contact piece is connected, the other end of which is connected to one end of a linkage, and the other end of the linkage is connected to a supporting linkage in the linkage control block group, and the overcurrent occurs in the power line At this time, the moving and static contacts are separated, and the load is disconnected from the power line. 5. The circuit breaker with remote control function according to claim 1, wherein the remote circuit breaker control unit comprises: A circuit breaking actuator, used to realize the action of disconnecting the load from the power line; An execution control circuit, which is connected with the disconnection actuator and controls the action of the disconnection actuator. 6. The circuit breaker with remote control function according to claim 5, characterized in that, the circuit breaking actuator comprises: A first electromagnet and a first armature, the first armature is arranged at the lower end of the linkage member, and one end of the electromagnet corresponds to the position of the first armature. 7. The circuit breaker with remote control function according to claim 5, characterized in that, the execution control circuit comprises: A power supply circuit, which is connected with the first electromagnet coil of the circuit breaker to provide power for it; A power supply control circuit controls the on-off of the power supply circuit, thereby controlling the execution of the action of the circuit breaker actuator. 8. The circuit breaker with remote control function according to claim 7, characterized in that, the power supply circuit is a rectifier circuit, the output end of which is connected to the input end of the electromagnetic coil of the first electromagnet , the input end of the rectifier circuit and the output end of the electromagnetic coil are respectively connected to the phase line terminal and the neutral line terminal of the power line output terminal. 9. The circuit breaker with remote control function according to claim 7, wherein the power control circuit comprises: An optocoupler, used to transmit control signals, one output end of which is connected to the positive pole of the rectification circuit; A thyristor, the control end of which is connected to the other output end of the photocoupler, and the other two ends of the thyristor are connected to the positive and negative poles of the rectifier circuit to control the flow of the execution control circuit. broken. 10. The circuit breaker with remote control function according to claim 7, wherein the power control circuit comprises: An optocoupler, used to transmit control signals, one output end of which is grounded; A thyristor, the control terminal of which is connected to the other output terminal of the photocoupler, the other output terminal of the photocoupler is connected to a capacitor, the other end of the capacitor is grounded, and the other two terminals of the thyristor The terminals are connected with the positive and negative poles of the rectification circuit to control the on-off of the execution control circuit. 11. The circuit breaker with remote control function according to claim 7, wherein the power control circuit comprises: A photoelectric receiving tube, which receives the optical signal transmitted from the remote control center through an optical fiber and a socket, and one output terminal thereof is grounded; A thyristor, the control end of which is connected to the other output end of the photodiode, and the other two ends of the thyristor are connected to the positive and negative poles of the rectification circuit to control the on-off of the execution control circuit . 12. The circuit breaker with remote control function according to claim 5, further comprising: a feedback monitoring circuit comprising: A photoelectric coupler, one end of which is connected to the positive pole of the rectifier circuit, and the other end is grounded. When the power line is connected, the output end of the photoelectric coupler outputs a switch signal to the corresponding remote control device . 13. The circuit breaker with remote control function according to claim 5, further comprising: a feedback monitoring circuit comprising: A light-emitting diode, one end of which is connected to the positive pole of the rectifier circuit, and the other end is grounded. When the power line is connected, the output end of the light-emitting diode outputs an optical signal, which is transmitted to the corresponding through the optical fiber and the socket. remote control device. 14. The circuit breaker with remote control function according to claim 5, further comprising: A remote control signal receiving circuit for receiving external wireless control signals; A decoding circuit, which is connected to the remote control signal receiving circuit to obtain a corresponding digital control signal; A decoding circuit analyzes and converts the digital control signal into a voltage signal and outputs it to the power supply control circuit. 15. The circuit breaker with remote control function according to claim 1, further comprising a secondary protection circuit breaker, when the first circuit breaker fails when cutting off the power line, the The secondary protection breaking unit automatically disconnects the load from the power line, which includes: A detection circuit, used to detect whether the first breaking unit fails when performing a breaking operation; A secondary circuit breaking actuator, when the detection circuit detects that the first circuit breaking unit fails to perform the circuit breaking operation, the load is automatically disconnected from the power line. 16. The circuit breaker with remote control function according to claim 15, wherein the detection circuit comprises: A tact switch, which is arranged at the lower part of the handle, and one end of which is connected to a terminal on the first movable contact piece through a wire; An electromagnet, which is arranged on a bracket in the box body, the electromagnetic coil input end of the electromagnet is connected with the above-mentioned wire, and its output end is connected with a zero line terminal line; when the handle of the first circuit breaking unit When turning to the disconnected position, the tact switch is closed, and if the phase line is not disconnected, a current flows into the coil of the electromagnet, causing the electromagnet to act. 17. The circuit breaker with remote control function according to claim 15, characterized in that, the secondary circuit breaker actuator comprises: A secondary breaking action mechanism, which includes: An overturning frame, the overturning frame rotates around a twisted shaft, the ejection end of the iron core leans against one side of the overturning frame, and it also has an overlapping surface; A turning plate, which rotates around the hinge shaft in the middle, and one end of the turning plate is overlapped on the overlapping surface; A moving contact assembly, which is arranged in the bracket in the box body, the moving contact assembly includes: a T-shaped frame with a spring on it, and one end of the T-shaped frame has a conductive contact , the other end of the T-shaped frame leans against the other end of the flip plate; A junction frame, which is provided with a second phase line connection terminal inside, the second phase line connection terminal is connected to the phase line, and it is connected to the phase line phase of the phase line extended from the first breaking unit through two static contacts. connect; The conductive movable contact and the two static contacts are normally closed. 18. The circuit breaker with remote control function according to claim 15, further comprising a fault state indicating circuit, which includes: An indicator light is used to indicate whether the disconnecting function of the first circuit breaking unit is invalid. 19. The circuit breaker with remote control function according to claim 16, further comprising a power line status indicating circuit, which includes: An indicator light, which is connected to the connection terminal of the neutral line and the first phase line, is used to indicate whether the power line has voltage. 20. The circuit breaker with remote control function according to claim 18 or 19, characterized in that it further comprises: a power conversion circuit, which transforms the voltage of the power line, and provides the fault state indication circuit and power line The status indication circuit provides power. 21. The circuit breaker with remote control function according to claim 1, further comprising an overvoltage protection unit, which is used to output a control signal to disconnect the circuit breaker when an overvoltage occurs in the power line ; It includes: a voltage signal sampling circuit, which is connected to the anode of the rectification circuit to obtain the voltage value of the power line; An overvoltage judgment circuit, which includes a comparator, the output terminal of the voltage signal sampling circuit is connected to the non-inverting input terminal of the comparator, and a reference voltage is set at the inverting input terminal of the comparator, so The output terminal of the comparator is connected to the control terminal of the thyristor. When the comparator outputs a control signal due to the excessive voltage of the non-inverting input terminal, the circuit breaking actuator is activated, and the load is automatically disconnected from the power line. open. 22. The circuit breaker with remote control function according to claim 21, further comprising: an overvoltage adjustment circuit for adjusting the maximum allowable voltage. 23. The circuit breaker with remote control function according to claim 22, characterized in that the overvoltage adjustment circuit is a sliding rheostat, which is arranged between the non-inverting input terminal of the comparator and the ground; Or a sliding rheostat is provided between the inverting input terminal of the comparator and the ground. 24. The circuit breaker with remote control function according to claim 21, characterized in that, the overvoltage judging circuit comprises: an analog/digital converter and a processor, and the positive pole of the rectifying circuit is connected to the The input end of the analog/digital converter is connected, the output end of the analog/digital converter is connected with the input of the processor, the processor is set with a threshold, and the processor controls the conduction of the thyristor. 25. The circuit breaker with remote control function according to claim 1, characterized in that, the entire box body is made of transparent insulating and flame-retardant materials. 26. The circuit breaker with remote control function according to claim 1, characterized in that, the upper part of the box corresponding to the position of the static contact is made of transparent insulating flame-retardant material. 27. The circuit breaker with remote control function according to claim 3, characterized in that both the first movable contact and the first static contact are provided with a fluorescent coating.

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