An integrated residual current operated circuit breaker

Abstract

The present invention is applicable to the electrical field, and provides an integrated residual current operated circuit breaker, including a circuit breaker body; a residual current control component electrically connected to the circuit breaker body; an overvoltage and undervoltage control component electrically connected to the circuit breaker body; and an action mechanism mechanically connected to the circuit breaker body, the residual current control component, and the overvoltage and undervoltage control component, respectively; the circuit breaker body, the overvoltage and undervoltage control component, the residual current control component, and the action mechanism are integrated. The present invention integrates leakage protection, circuit breaker, and self-recovery overvoltage and undervoltage protection into one product, with a high degree of integration, low cost, small space occupied in the distribution box, and easy installation.

Description

Technical Field

[0001] The invention belongs to the electrical field, and in particular relates to an integrated residual current operated circuit breaker with self-recovery over- and under-voltage functions. Background Art

[0002] According to the requirements of the electrical installation specifications for residential buildings, each household needs to install a residual current circuit breaker (RCBO) and a resettable over- and under-voltage protector (OUPA). Among them, the residual current circuit breaker has the functions of circuit breaker and leakage protection, and disconnects the main circuit when leakage or insulation failure occurs in the main circuit. The resettable over- and under-voltage protector can automatically detect the line voltage, automatically cut off the power when the overvoltage and undervoltage in the line exceed the specified value, and automatically close the circuit when the voltage in the line returns to normal. Figure 1 As shown, the current method of using two independent products, the leakage protection circuit breaker and the self-recovery over-voltage and under-voltage protector, is combined and used. They are connected by wires and work independently without coordination, resulting in poor integration, high cost, and inconvenient installation. In addition, in this way of use, the leakage protection circuit breaker occupies 3 positions, the self-recovery over-voltage and under-voltage protector occupies 2 positions, and a total of 5 positions, which takes up too much space in the distribution box and affects the number of other branch circuits in the distribution box. Summary of the invention

[0003] The embodiment of the present invention provides an integrated residual current operated circuit breaker, which aims to solve the problem that the existing residential leakage protection circuit breaker and the self-recovery over-undervoltage protector are two products that are installed and used independently, have poor integration, high cost, and occupy too much space in the distribution box.

[0004] The embodiment of the present invention is implemented as follows: an integrated residual current operated circuit breaker includes:

[0005] Circuit breaker body;

[0006] A residual current control component electrically connected to the circuit breaker body, and sending a residual current tripping drive signal when detecting that the residual current value flowing through the circuit breaker body is greater than the tripping threshold current value;

[0007] An over-voltage or under-voltage control component electrically connected to the circuit breaker body, which sends an over-voltage or under-voltage tripping drive signal when an over-voltage or under-voltage fault is detected in the voltage of the circuit breaker body, and sends a reclosing signal when the voltage returns to normal; and

[0008] The action mechanism is mechanically connected to the circuit breaker body, the residual current control component and the over-voltage and under-voltage control component respectively, and triggers the circuit breaker body to trip when receiving the corresponding tripping drive signal, and triggers the circuit breaker body to close when receiving the reclosing signal;

[0009] The circuit breaker body, the overvoltage and undervoltage control component, the residual current control component and the action mechanism are integrated.

[0010] Furthermore, the residual current control component comprises:

[0011] A residual current detection unit electrically connected to the circuit breaker body, detecting a current vector sum flowing through the circuit breaker body, and outputting a residual current signal;

[0012] A residual current action control unit electrically connected to the residual current detection unit, which outputs a tripping control signal when it is determined that the current value of the residual current signal is greater than a tripping threshold current value; and

[0013] The residual current tripping drive unit is electrically connected to the residual current action control unit and mechanically connected to the action mechanism. When receiving the tripping control signal, the residual current tripping drive unit sends a tripping drive signal to the action mechanism to trigger the circuit breaker body to trip.

[0014] Furthermore, the over-voltage and under-voltage control component comprises:

[0015] An over-voltage and under-voltage detection unit electrically connected to the circuit breaker body and detecting the voltage of the circuit breaker body;

[0016] an over-voltage or under-voltage tripping driving unit electrically connected to the over-voltage or under-voltage detection unit, and sending an over-voltage or under-voltage tripping driving signal to the action mechanism when an over-voltage or under-voltage fault occurs to the voltage; and

[0017] A reclosing unit electrically connected to the over-voltage and under-voltage detection unit, mechanically connected to the action mechanism, and sending a reclosing signal to the action mechanism when the voltage returns to normal.

[0018] Furthermore, the reclosing unit is driven by a motor.

[0019] Furthermore, the reclosing unit comprises:

[0020] Motors; and

[0021] A reduction gear set matched with the motor.

[0022] Furthermore, the residual current control component and the over-voltage and under-voltage control component are integrated on a circuit board.

[0023] Furthermore, the tripping drive signal is an overcurrent tripping drive signal;

[0024] The overcurrent release driving signal is controlled by a dual-metal component, and the thermal deformation of the dual-metal component drives the action mechanism to release.

[0025] Furthermore, the tripping drive signal is a short-circuit current tripping drive signal;

[0026] The short-circuit current tripping driving signal is controlled by an electromagnetic system, and the action mechanism is driven to trip by the action of the ejector rod in the electromagnetic system.

[0027] The embodiment of the present invention integrates and integrates the functions of the leakage protection circuit breaker and the self-recovery over-voltage and under-voltage protector, removes the redundant parts, and organically integrates the leakage protection, circuit breaker, and self-recovery over-voltage and under-voltage protection into one product with a high degree of integration, which only occupies 3 positions, thereby saving 2 positions in the distribution box for users to install more branch circuits. At the same time, the integrated product has a lower cost, reducing the user's purchase expenditure. In addition, the product is more convenient to install, repair or replace in the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the installation of leakage protection circuit breaker and self-recovery over-voltage and under-voltage protection device in the prior art;

[0029] Figure 2 A structural schematic diagram of an integrated residual current operated circuit breaker provided in Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic structural diagram of an integrated residual current operated circuit breaker provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The embodiment of the present invention organically integrates and integrates the functions of the traditional independently configured leakage protection circuit breaker and the self-recovery over- and under-voltage protection device, removes redundant parts, and integrates the leakage protection, circuit breaker, and self-recovery over- and under-voltage protection into one product with a high degree of integration, low cost, small space occupied in the distribution box, and easy installation.

[0033] Embodiment 1

[0034] Figure 1 The structural principle of the residual current operated circuit breaker provided by the embodiment of the present invention is shown. For the convenience of explanation, only the parts related to the embodiment of the present invention are shown.

[0035] The integrated residual current operated circuit breaker can be installed in a residential distribution box, and includes a circuit breaker body 11, a residual current control component 13 and an overvoltage and undervoltage control component 14 electrically connected to the circuit breaker body 11, and an actuating mechanism 12 mechanically connected to the circuit breaker body 11, the residual current control component 13 and the overvoltage and undervoltage control component 14.

[0036] When the residual current control component 13 detects that the residual current value flowing through the circuit breaker body 11 is greater than the tripping threshold current value, it sends a residual current tripping driving signal.

[0037] When the overvoltage or undervoltage fault is detected in the voltage of the circuit breaker body 11, the overvoltage or undervoltage control component 14 sends out an overvoltage or undervoltage tripping driving signal; when the voltage returns to normal, it sends out a reclosing signal.

[0038] The action mechanism 12 triggers the circuit breaker body 11 to trip when receiving the corresponding tripping drive signal, and triggers the circuit breaker body 11 to close when receiving the reclosing signal sent by the over-voltage and under-voltage control component 14.

[0039] In the embodiment of the present invention, the circuit breaker body 11, the overvoltage and undervoltage control component 14, the residual current control component 13 and the action mechanism 12 are integrated.

[0040] In the embodiment of the present invention, the tripping drive signal received by the action mechanism 12 may be a residual current tripping drive signal, an overcurrent tripping drive signal, or a short-circuit current tripping drive signal issued by the residual current control component 13, or may be an overvoltage or undervoltage tripping drive signal issued by the overvoltage or undervoltage control component 14.

[0041] The embodiment of the present invention integrates and integrates the functions of the leakage protection circuit breaker and the self-recovery over-voltage and under-voltage protector, removes the redundant parts, and organically integrates the leakage protection, circuit breaker, and self-recovery over-voltage and under-voltage protection into one product with a high degree of integration, which only occupies 3 positions, thereby saving 2 positions in the distribution box for users to install more branch circuits. At the same time, the integrated product has a lower cost, reducing the user's purchase expenditure. In addition, the product is more convenient to install, repair or replace in the distribution box.

[0042] Embodiment 2

[0043] In the embodiment of the present invention, the circuit breaker body 11 realizes the functions of overload protection and short circuit protection for the circuit. Among them, the circuit breaker body 11 can realize overcurrent protection by using a dual-metal component system, also known as a thermal trip system; short circuit protection can be realized by using an electromagnetic system. When the circuit is overloaded or short-circuited, the lock of the action mechanism 12 is pulled by the dual-metal component system or the electromagnetic system, so that the action of the action mechanism 12 drives the circuit breaker body 11 to trip.

[0044] Embodiment 3

[0045] As an embodiment of the present invention, see Figure 1 , the residual current control component 13 comprises:

[0046] The residual current detection unit 131 is electrically connected to the circuit breaker body 11, detects the current vector sum flowing through the circuit breaker body 11, and outputs a residual current signal.

[0047] The residual current action control unit 132 is electrically connected to the residual current detection unit 131 , and outputs a trip control signal when it is determined that the current value of the residual current signal is greater than the trip threshold current value.

[0048] The residual current tripping driving unit 133 is electrically connected to the residual current action control unit 132 , and sends a tripping driving signal to the action mechanism 12 upon receiving a tripping control signal, thereby triggering the circuit breaker body 11 to trip through the action mechanism 12 .

[0049] Embodiment 4

[0050] As a preferred embodiment of the present invention, the residual current control component 13 also includes a test circuit 134, which allows the user to regularly test the protective function of the residual current action.

[0051] Embodiment 5

[0052] As an embodiment of the present invention, see Figure 1 , the undervoltage action control component 14 includes:

[0053] The over-voltage and under-voltage detection unit 141 is electrically connected to the circuit breaker body 11 to detect the voltage of the circuit breaker body 11 .

[0054] The over-voltage or under-voltage tripping driving unit 142 is electrically connected to the over-voltage or under-voltage detecting unit 141 , and sends an over-voltage or under-voltage tripping driving signal to the action mechanism 12 when an over-voltage or under-voltage fault occurs, thereby triggering the circuit breaker body 11 to trip through the action mechanism 12 .

[0055] The reclosing unit 143 is connected to the over-voltage and under-voltage detection unit 141. When the over-voltage and under-voltage detection unit 141 detects that the voltage returns to normal, the reclosing unit 143 sends a reclosing signal to the action mechanism 12, and the action mechanism 12 triggers the circuit breaker body 11 to close.

[0056] Embodiment 6

[0057] As a preferred embodiment of the present invention, the reclosing unit 143 is driven by a motor so that the product has a higher degree of integration and occupies less space.

[0058] Embodiment 7

[0059] As an embodiment of the present invention, the reclosing unit 143 includes a motor and a reduction gear set (not shown in the figure) matched with the motor.

[0060] Embodiment 8

[0061] As a preferred embodiment of the present invention, the residual current control component 13 and the over-voltage and under-voltage control component 14 are integrated on a circuit board, which further increases the integration of the product and makes the product occupy less space.

[0062] Embodiment 9

[0063] The following is a detailed description of the specific implementation of the residual current operated circuit breaker using an implementation example.

[0064] See also Figure 2 The circuit breaker body 11 includes a breakable contact 111 , a thermal release 112 and a magnetic release 113 .

[0065] Two breakable contacts 111 are respectively arranged on the neutral line N and the live line L, and are used to disconnect or connect the circuit to the mains.

[0066] The thermal release 112 is connected in series with the live wire L, and is used to push the breakable contact 111 to disconnect after the overload current reaches a preset time.

[0067] The magnetic release 113 is connected in series with the live wire L, and is used to push the breakable contact 111 to disconnect when the instantaneous current multiple reaches a preset value.

[0068] The residual current detection unit 131 is implemented by a zero-sequence current transformer, and is used to detect the magnitude of the residual current and output the residual current signal to the residual current action control unit 132 .

[0069] When the residual current action control unit 132 determines that the current value of the residual current is greater than the tripping threshold current, such as an overcurrent or a short-circuit current, a tripping control signal is sent to the residual current tripping driving unit 133 .

[0070] The push rod in the residual current tripping drive unit 133 generates mechanical movement, acting on the action mechanism 12, and the action mechanism 12 is tripped, causing the circuit breaker body 11 to trip, and the contact 111 can be disconnected, thereby realizing the residual current protection function.

[0071] The over-voltage and under-voltage control assembly 14 is respectively connected to the incoming terminals of the neutral line N and the live line L. The over-voltage and under-voltage detection unit 141 can obtain the voltage of the neutral line N and the voltage of the live line L, and then obtain the power supply voltage. When the power supply voltage is lower than the preset minimum value or higher than the preset maximum value, the over-voltage and under-voltage tripping driving unit 142 sends an under-voltage tripping driving signal to the action mechanism 12, so that the circuit breaker body 11 trips and the breakable contact 111 is disconnected.

[0072] When the over-voltage and under-voltage detection unit 141 detects that the power supply voltage is restored to the preset normal range, the reclosing unit 143 sends a reclosing signal to the action mechanism 12. When the action mechanism 12 receives the reclosing signal, it drives the circuit breaker body 11 to close.

[0073] In the embodiment of the present invention, the residual current tripping drive unit 133 , the overvoltage and undervoltage tripping drive unit 142 , and the reclosing unit 143 are all mechanically connected to the circuit breaker body 11 through the action mechanism 12 .

[0074] Specifically, when the residual current tripping drive unit 133 receives the tripping control signal sent by the residual current action control unit 132, the internal tripping coil is energized, and the magnetic field pushes the push rod to move along a preset trajectory. The moving push rod pushes the action mechanism 12 to release, triggering the disconnectable contact 111 of the circuit breaker body 11 to disconnect.

[0075] When the reclosing unit 143 receives the reclosing action signal, the motor drives the turbine and the worm shaft to move, thereby generating a rotational torque, which in turn drives the action mechanism 12 to release, triggering the operating handle on the circuit breaker body 11 to close the circuit.

[0076] In addition, in the embodiment of the present invention, the electromagnet and the coil are used in combination to protect the line, which can further reduce the volume of the integrated residual current operated circuit breaker.

[0077] It can be seen from the schematic structure of the above-mentioned integrated residual current operated circuit breaker that the embodiment of the present invention integrates and integrates the functions of the leakage protection circuit breaker and the self-recovery over- and under-voltage protector, removes the redundant parts, and organically integrates the leakage protection, circuit breaker, and self-recovery over- and under-voltage protection into one product with a high degree of integration, occupying only 3 positions, thereby saving 2 positions in the distribution box for users to install more branch circuits. At the same time, the integrated product has a lower cost, reducing the user's purchase expenditure. In addition, the product is more convenient to install, repair or replace in the distribution box.

[0078] Embodiment 10

[0079] In the embodiment of the present invention, the over-voltage and under-voltage control component 14, the residual current control component 13 and the action mechanism 12 are integrated with the circuit breaker body 11, which reduces the volume of the residual current operated circuit breaker. When installing the integrated residual current operated circuit breaker, it only needs to be connected to the neutral line N and the live line L, which reduces the assembly time of each functional module in the case of non-integration.

[0080] Embodiment 11

[0081] In the embodiment of the present invention, after the circuit breaker body 11 is unfastened and the connection between the breakable contacts 111 is disconnected, the over-voltage and under-voltage detection unit 141 still detects the voltage of the neutral line N and the live line L, and sends a reclosing signal when the power supply voltage returns to the preset normal range. When receiving the reclosing signal, the reclosing unit 143 drives the handle of the circuit breaker body 11 to close through the action mechanism 12, driving the breakable outlet 111 to close. This series of actions allows the breakable contacts 111 of the circuit breaker body 11 to be automatically closed through mechanical connection without manual closure, achieving a self-recovery effect.

[0082] Embodiment 12

[0083] In the embodiment of the present invention, the test circuit 134 provides the user with a protection function of periodically testing the residual current action.

[0084] The test circuit 134 includes a test button T 1341 and a zero-sequence test resistor 1342 .

[0085] The test button T 1341 and the zero-sequence test resistor 1342 are connected between the live wire L and the neutral wire N, and across the zero-sequence current transformer.

[0086] When the disconnectable contact 111 is closed, the test button T 1341 is pressed to connect the zero-sequence test resistor 1342 to the neutral line N, and the zero-sequence current transformer generates a residual current to detect whether the leakage tripping function is normal. When the product is tripped, it is normal, and when the product is not tripped, it is abnormal. When the disconnectable contact 111 is disconnected, the test button T 1341 is pressed, and the load circuit cannot be powered at this time.

[0087] When the test circuit 134 is tested, the zero-sequence current transformer serving as the residual current detection unit 131 detects the residual current signal and outputs the residual current signal to the residual current action control unit 132. The residual current action control unit 132 sends a tripping control signal to the residual current tripping drive unit 133. The push rod of the residual current tripping drive unit 133 outputs mechanical motion and hits the lock of the action mechanism 12, thereby disconnecting the contact 111 of the circuit breaker body 11, thereby achieving the effect of detecting the residual current action characteristics.

[0088] Embodiment 13

[0089] As an embodiment of the present invention, the reclosing unit 143 includes a motor and a reduction gear set (not shown in the figure) matched with the motor.

[0090] When receiving the reclosing signal, the reclosing unit 143 controls the motor to rotate, and the reduction gear set meshing with the motor at one end is driven by the motor to start rotating. The rotating reduction gear set drives the turbine and worm shaft connected to the other end to move, generating a rotational torque, and then drives the operating handle on the circuit breaker body 11 to close the circuit through the action mechanism 12.

[0091] Embodiment 14

[0092] In the embodiment of the present invention, the input end of the residual current detection unit 131 and the input end of the over-voltage and under-voltage detection unit 141 need to obtain the power supply voltage from the neutral line N and the live line L. The output end of the residual current tripping drive unit 133 and the output end of the over-voltage and under-voltage tripping drive unit 142 are both connected to the action mechanism 12. Therefore, the connection positions of the residual current control component 13 and the over-voltage and under-voltage control component 14 are close, and the residual current control component 13 and the over-voltage and under-voltage control component 14 can be integrated on a circuit board, which can reduce the size of the product while ensuring the normal use of the functional modules.

[0093] Embodiment 15

[0094] As an embodiment of the present invention, the overcurrent tripping driving signal issued by the residual current control component 13 is controlled by the bimetal component in the residual current tripping driving unit 133, and the thermal deformation of the bimetal component drives the tripping of the action mechanism 12.

[0095] Embodiment 16

[0096] As an embodiment of the present invention, the short-circuit current tripping driving signal issued by the residual current control component 13 is controlled by the electromagnetic system in the residual current tripping driving unit 133, and the action mechanism 12 is driven to trip by the action of the top rod in the electromagnetic system.

[0097] The embodiment of the present invention integrates and integrates the functions of the leakage protection circuit breaker and the self-recovery over-voltage and under-voltage protector, removes the redundant parts, and organically integrates the leakage protection, circuit breaker, and self-recovery over-voltage and under-voltage protection into one product with a high degree of integration, which only occupies 3 positions, thereby saving 2 positions in the distribution box for users to install more branch circuits. At the same time, the integrated product has a lower cost, which reduces the user's purchase expenditure. In addition, the product is more convenient to install, repair or replace in the distribution box.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated residual current operated circuit breaker, characterized in that: The circuit breaker comprises: Circuit breaker body; A residual current control component electrically connected to the circuit breaker body, and sending a residual current tripping drive signal when detecting that the residual current value flowing through the circuit breaker body is greater than the tripping threshold current value; An over-voltage or under-voltage control component electrically connected to the circuit breaker body, which sends an over-voltage or under-voltage tripping drive signal when an over-voltage or under-voltage fault is detected in the voltage of the circuit breaker body, and sends a reclosing signal when the voltage returns to normal; and The action mechanism is mechanically connected to the circuit breaker body, the residual current control component and the over-voltage and under-voltage control component respectively, and triggers the circuit breaker body to trip when receiving the corresponding tripping drive signal, and triggers the circuit breaker body to close when receiving the reclosing signal; The circuit breaker body, overvoltage and undervoltage control component, residual current control component and action mechanism are integrated, and the residual current control component and the overvoltage and undervoltage control component are integrated on a circuit board; Wherein, the residual current control component comprises: A residual current detection unit electrically connected to the circuit breaker body, detecting a current vector sum flowing through the circuit breaker body, and outputting a residual current signal; A residual current action control unit electrically connected to the residual current detection unit, which outputs a tripping control signal when it is determined that the current value of the residual current signal is greater than a tripping threshold current value; and A residual current tripping drive unit electrically connected to the residual current action control unit and mechanically connected to the action mechanism, and sending a tripping drive signal to the action mechanism upon receiving the tripping control signal to trigger the circuit breaker body to trip; The residual current control assembly further comprises: a test circuit for providing a protection function of periodically self-testing residual current action; The over-voltage and under-voltage control component comprises: An over-voltage and under-voltage detection unit electrically connected to the circuit breaker body and detecting the voltage of the circuit breaker body; an over-voltage or under-voltage tripping driving unit electrically connected to the over-voltage or under-voltage detection unit, and sending an over-voltage or under-voltage tripping driving signal to the action mechanism when an over-voltage or under-voltage fault occurs to the voltage; and A reclosing unit electrically connected to the over-voltage and under-voltage detection unit, mechanically connected to the action mechanism, and sending a reclosing signal to the action mechanism when the voltage returns to normal; The circuit breaker body includes a breakable contact, a thermal release and a magnetic release: Two breakable contacts are respectively arranged on the neutral line N and the live line L, for disconnecting or connecting the circuit to the mains; The thermal release is connected in series with the live wire L, and is used to push the breakable contact to disconnect after the overload current reaches a preset time; The magnetic release is connected in series with the live wire L and is used to push the breakable contacts to disconnect when the instantaneous current multiple reaches a preset value.

2. The integrated residual current operated circuit breaker according to claim 1, characterized in that: The reclosing unit is driven by a motor.

3. The integrated residual current operated circuit breaker according to claim 2, characterized in that: The reclosing unit comprises: Motors; and A reduction gear set matched with the motor.

4. The integrated residual current operated circuit breaker according to claim 1, characterized in that: The tripping drive signal is an overcurrent tripping drive signal; The overcurrent release driving signal is controlled by a dual-metal component, and the thermal deformation of the dual-metal component drives the action mechanism to release.

5. The integrated residual current operated circuit breaker according to claim 1, characterized in that: The tripping drive signal is a short-circuit current tripping drive signal; The short-circuit current tripping driving signal is controlled by an electromagnetic system, and the action mechanism is driven to trip by the action of the ejector rod in the electromagnetic system.

Images