CN113257631A

CN113257631A - Circuit breaker

Info

Publication number: CN113257631A
Application number: CN202010088449.3A
Authority: CN
Inventors: 周长青; 雷广; 顾翔翼
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2021-08-13

Abstract

A circuit breaker comprises a residual current analysis comparison circuit and an execution mechanism, and comprises an electronic detection circuit, an electromagnetic residual current detection circuit and a drive circuit; the electronic detection circuit comprises a working power supply and a detection circuit, the detection circuit comprises an electronic residual current detection circuit, a processing circuit and a comparison circuit, the electronic residual current detection circuit collects fault signals and converts the fault signals into sampling output signals, the processing circuit amplifies the received sampling output signals to form preprocessing signals, the comparison circuit receives the preprocessing signals and compares the preprocessing signals with a set threshold value, and the comparison circuit outputs the fault signals and controls a driving circuit to enable an execution mechanism to operate a circuit breaker to trip; the electromagnetic residual current detection circuit is used for monitoring the circuit by the electromagnetic residual current fault monitor, and enables the actuating mechanism to operate the circuit breaker to trip. The circuit breaker of the invention has two detection circuits which can work together without mutual interference.

Description

Circuit breaker

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a circuit breaker.

Background

The residual current operated circuit breaker is an important electric appliance protection device, is mainly used for detecting residual current, compares the residual current value with a reference value, and when the residual current value exceeds the reference value, the mechanical switch electric appliance which enables a main circuit contact to be disconnected can rapidly cut off a fault power supply in a very short time when a human body gets an electric shock or the leakage current of a power grid exceeds a specified value, thereby protecting the safety of the human body and electric equipment, and simultaneously protecting the overload or short-circuit fault of a circuit.

The traditional residual current operated circuit breaker monitors the leakage current generated when the L/N lines are unbalanced through a current transformer, and is realized by arranging a zero sequence transformer which is large, so that the volume of the product is large. In particular, it comprises: the circuit breakers with a plurality of residual current protection types such as sine alternating current residual current, pulse direct current residual current, smooth direct current residual current, composite residual current, pulse direct current residual current superposition smooth direct current residual current, alternating current residual current superposition smooth direct current residual current, high-frequency sine alternating current residual current and the like have the advantages that the circuit principle is complex, the size of a circuit board is large, elements such as a differential current fault detector, an electromagnetic tripping relay, a tripping mechanism and the like are large, the volume of the integrated structure is large, the integrated structure is usually made into a residual current operated circuit breaker without over-current protection or a residual current operated protection module, and then the integrated protection mode can be formed by matching or assembling with the circuit breaker, so that the volume of the product is large, the wire loop is long, the power consumption is large, and the space utilization rate in the box body is low, resulting in higher production cost of the product and being not beneficial to the trend of miniaturization development of low-voltage electrical appliances.

There are circuit breakers designed with two or more current transformers in the existing product, but usually one of these two transformers is used for main loop current detection and metering for the current transformer, and the other transformer is used for residual current detection for the residual current transformer, and the current transformers in these circuit breakers are usually used for converting the large current in the alternating current circuit into the small current of a certain proportion for measurement and monitoring protection, and the actual current that the monitoring L line flows through is big or small, and the residual current transformer is used for monitoring the leakage current that produces when unbalance between the L/N lines, and usually, the zero sequence transformer is adopted to set up to realize, and the volume of this kind of product is also very big.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a circuit breaker with simple structure and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a circuit breaker comprises an actuating mechanism and a residual current analysis comparison circuit used for driving the actuating mechanism, wherein the residual current analysis comparison circuit comprises an electronic detection circuit, an electromagnetic residual current detection circuit and a driving circuit; the electronic detection circuit is used for monitoring the circuit by the electronic residual current fault monitor, the electronic detection circuit comprises a working power supply and a detection circuit powered by the working power supply, the detection circuit comprises an electronic residual current detection circuit, a processing circuit and a comparison circuit, the electronic residual current detection circuit collects fault signals and converts the fault signals into sampling output signals, the processing circuit amplifies the received sampling output signals to form preprocessing signals, the comparison circuit receives the preprocessing signals and compares the preprocessing signals with a set threshold value, and the comparison circuit outputs the fault signals and controls the driving circuit to enable the actuating mechanism to operate the circuit breaker to trip; the electromagnetic residual current detection circuit is used for monitoring the circuit by the electromagnetic residual current fault monitor, and the electromagnetic residual current detection circuit enables the actuating mechanism to operate the circuit breaker to trip through the output signal.

Further, the electromagnetic residual current fault monitor is used for monitoring residual current under the condition of no power supply voltage; under the condition that the product has mains voltage, electronic type residual current fault monitor is used for monitoring the residual current, and electromagnetic type residual current fault monitor is out of work this moment.

The circuit breaker further comprises an insulating shell, a partition plate is arranged in the insulating shell, the partition plate divides the space in the circuit breaker into a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are used for mounting a phase electrode or a neutral electrode of the circuit breaker, a residual current analysis driving module which is integrally formed with the insulating shell is arranged on one side of the insulating shell in parallel, a residual current detection circuit board is arranged in the residual current analysis driving module, and a residual current analysis comparison circuit is arranged on the residual current detection circuit board; the electronic residual current fault monitor and the electromagnetic residual current fault monitor are arranged in the residual current analysis driving module or the second mounting groove.

Further, the working power supply comprises a DC switch power supply, a voltage stabilizing circuit is connected between the DC switch power supply and the residual current analysis comparison circuit, the DC switch power supply further comprises a rectifier diode, a safety resistor and a filter circuit, one end of the rectifier diode is connected with the L pole of the power supply, the other end of the rectifier diode is connected with one end of the filter circuit, one end of the safety resistor is connected with the N pole of the power supply, the other end of the safety resistor is connected with the filter circuit, the output end of the filter circuit is connected with the DC switch power supply, a surge resistor is connected between the L pole of the power supply and the N pole of the power supply in parallel, the DC switch power supply comprises a DC/DC switch power supply chip, and the output end of the DC/DC switch power supply chip is connected with the voltage stabilizing circuit.

Further, the electromagnetic residual current detection circuit comprises a capacitor C21, a capacitor C22, a resistor R34, a resistor R36, a resistor R37, a diode D7, a diode D8, an N-MOS field effect transistor Q4 and a controller P1; one end of the resistor R36 is connected with a power supply positive pole VCC, the other end of the resistor R36 is connected with one end of a resistor R37 and a gate G of an N-MOS field effect transistor Q4, a drain D of the N-MOS field effect transistor Q4 is connected with one end of a resistor R35, a source S of the N-MOS field effect transistor Q4 is connected with the other end of the resistor R37 and the other end of the resistor R35, one end of the resistor R35 connected with the drain D of the N-MOS field effect transistor Q4 is connected with one secondary winding output end CT1 of the electromagnetic transformer of the electromagnetic residual current fault monitor, and one end of the resistor R35 connected with the source S of the N-MOS field effect transistor Q4 is connected with the other secondary winding output end CT2 of the electromagnetic transformer of the electromagnetic residual current fault monitor; the anode of the diode D7 and the cathode of the diode D8 are both connected to the anode of the capacitor C22, the cathode of the diode D7 and the anode of the diode D8 are both connected to the anode of the capacitor C21, the anode of the capacitor C22 is connected to the drain D of the N-MOS fet Q4, the anode of the capacitor C21 is connected to the source S of the N-MOS fet Q4 and to the ground GND, and the cathode of the capacitor C21 and the cathode of the capacitor C22 are connected to the actuator.

Further, the electronic residual current detection circuit comprises a TVS surge-impact-resistant protection absorption tube VR2, a triode Q1, a triode Q2, a capacitor C1, a capacitor C2, a capacitor C10, a capacitor C11, a resistor R2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R10, a resistor R11, a resistor R12, an operational amplifier U1A and an operational amplifier U1B; one end of a winding of the electronic residual current fault monitor is connected with one end of a TVS surge impact resistant protection absorption tube VR2, an emitter of a triode Q1 and an emitter of a triode Q2, the other end of the TVS surge impact resistant protection absorption tube VR2 and the other end of the winding of the electronic residual current fault monitor are connected with one end of a resistor R2, the other end of the resistor R2 is connected with the positive electrode of a capacitor C1, and the negative electrode of the capacitor C1 is connected with the negative electrode VSS of a power supply; the other winding of the electronic transformer of the electronic residual current fault monitor 41 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the TVS surge-impact-resistant protection absorbing tube VR2 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R2, one end of a resistor R1 is connected with the positive electrode of a capacitor C1, the other end of a resistor R1 is grounded to GND, one end of a resistor R3 is connected with a resistor R2, the other end of the resistor R3 is connected with the reverse input end of an operational amplifier U1A, the forward input end of the operational amplifier U1A is connected with one end of a resistor R4, the other end of a resistor R4 is grounded to GND, the output end of the operational amplifier U1A is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the base of a triode Q1 and the base of a triode Q2, the collector of the triode Q1 is connected with a power supply positive electrode VCC, and the collector of the triode Q2 is connected with a power supply negative electrode VSS; an inverting input end of the operational amplifier U1B is connected with an output end LD of the operational amplifier U1B, a forward input end of the operational amplifier U1B is connected with one ends of a resistor R12 and a capacitor C11, the other end of the capacitor C11 is grounded GND, the other end of the resistor R12 is connected with one ends of a resistor R11 and a capacitor C10, the other end of the capacitor C10 is respectively connected with the other ends of a resistor R10, a resistor R5 and a resistor R5, the other end of the resistor R10 is grounded GND through a resistor R4, the other end of the resistor R10 is grounded GND through a resistor R11, and two ends of a capacitor C2 are connected in parallel with two ends of a resistor R6.

Further, the processing circuit comprises an operational amplifier U2A, a capacitor C12, a capacitor C13, a resistor R13 and a resistor R14, wherein a forward input end of the operational amplifier U2A is connected with one end of a resistor R14 and one end of a capacitor C13, an output end Lw of the operational amplifier U2A and one end of a capacitor C12 are both connected with an inverting input end of the operational amplifier U2A, the other end of the resistor 14 and the other end of the capacitor C12 are both connected with one end of the resistor R13, the other end of the resistor R13 is connected with an output end of the electronic residual current detection circuit, and the other end of the capacitor C13 is grounded.

Further, the comparison circuit comprises an operational amplifier U3A, an operational amplifier U3B, a diode D1, a diode D2, a resistor R15, a resistor R16, a resistor R17, a resistor R18 and a resistor R19, wherein the forward input end of the operational amplifier U3A is grounded, the reverse input end of the operational amplifier U3A is connected with one end of the resistor R15 and the resistor R16 and the cathode of the diode D1, and the output end of the operational amplifier U3A is connected with the anode of the diode D1 and the cathode of the diode D2; the forward output end of the operational amplifier U3B is grounded GND, the reverse input end of the operational amplifier U3B is connected with one end of a resistor R17, a resistor R18 and a resistor R19, and the output end QL of the operational amplifier U3B is connected with the other end of a resistor R19; the anode of the diode D2 and the other end of the resistor R16 are connected to the other end of the resistor R18, and the other end of the resistor R15 and the other end of the resistor R17 are connected to the output terminal of the processing circuit.

Further, the driving circuit comprises an operational amplifier U4A, an operational amplifier U4B, a resistor R21, a resistor R27, a resistor R28, a resistor R28T, a resistor R29, a resistor R29T, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, an adjustable resistor VR1, a capacitor C20 and a triode Q3; the positive input end of the operational amplifier U4A is connected with one end of a capacitor C16 and one end of a resistor R21, the output end of the operational amplifier U4A is connected with the anode of a diode D5, and the other end of the resistor R21 is connected with the output end of a comparison circuit; one end of a resistor R29T and one end of a resistor R29 are connected with a power supply positive pole VCC, the other end of a resistor R29T is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28T, the other end of a resistor R29 is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28, the other ends of a resistor R28T and a resistor R28 are connected with a collector of a triode Q3, an emitter of the triode Q3 is connected with a power supply negative pole VSS, one end of the resistor R33 is connected with the power supply positive pole VCC, the other end of the resistor R33 is connected with a negative pole of an adjustable resistor VR1, the positive pole of the adjustable resistor VR1 is connected with one end of the resistor R34 and the base of the triode Q3, and the other end of the resistor R34 is connected with the power supply negative pole VSS; the inverting input terminal of the operational amplifier U4B is grounded GND, the output terminal of the operational amplifier U4B is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the actuator through the resistor R32, the forward input terminal of the operational amplifier U4B is connected to one end of the resistor R30, the other end of the resistor R30 is connected to one end of the resistor R27, the resistor R31 and the capacitor C20, the other end of the resistor R27 is connected to the cathode of the diode D5, and the other end of the resistor R31 and the other end of the capacitor C20 are connected to the cathode VSS of the power supply.

The processing circuit further comprises a voltage reference circuit which is used when power is supplied by a power grid voltage, and comprises an operational amplifier U2B, a resistor R7, a resistor R8, a capacitor C3 and a capacitor C4, wherein a forward input end of the operational amplifier U2B is connected with one ends of the resistor R8, the resistor R9 and the capacitor C4, an output end of the operational amplifier U2B and one end of the resistor R7 are connected with an inverted output end of the operational amplifier U2B, one end of the capacitor C3 is connected with the other end of the resistor R7 and grounded GND, the other end of the capacitor C3 is connected with a negative power supply electrode VSS, the other ends of the resistor R8 and the capacitor C4 are connected with a negative power supply electrode VSS, and the other end of the resistor R9 is connected with a positive power supply electrode VCC.

According to the circuit breaker, the residual current analysis comparison circuit arranged in the residual current analysis driving module comprises two residual current analysis detection circuits, namely an electronic residual current detection circuit and an electromagnetic residual current detection circuit, and the two residual current analysis detection circuits can work together and do not interfere with each other, so that the optimization and miniaturization design of a circuit board are facilitated.

In addition, the two residual current fault monitors are adopted to replace the existing residual current fault monitor with larger volume, so that the thickness of the residual current fault monitors is reduced, one of the residual current fault monitors is electromagnetic, and the other is electronic, and under the condition that a product has no power supply voltage, the electromagnetic residual current fault monitors are used for detecting sine alternating current residual current and pulse direct current residual current; under the product has mains voltage's the condition, electronic type residual current fault monitor is used for monitoring residual currents such as smooth direct current, high frequency sine alternating current residual current, compound residual current, and electromagnetic type residual current fault monitor is out of work this moment, not only compares current circuit breaker and has more perfect function of detecting the residual current, carries out different detection achievement moreover respectively, does benefit to the optimization of circuit board and reduces the cloth board design etc. do benefit to whole product and realizes miniaturized design.

Drawings

Fig. 1 is a schematic view of the structure of the circuit breaker of the present invention;

fig. 2 is a schematic view of a first construction of the circuit breaker of the present invention;

fig. 3 is a schematic diagram of a second construction of the circuit breaker of the present invention;

fig. 4 is a schematic diagram of a phase pole configuration for the circuit breaker of the present invention;

figure 5 is a schematic view of the neutral pole configuration of the circuit breaker of the present invention;

fig. 6 is a schematic diagram of a residual current analysis comparison circuit of the circuit breaker of the present invention;

FIG. 7 is a circuit diagram of the working power supply of the electronic detection circuit in the circuit breaker of the present invention;

fig. 8 is a circuit diagram of an electronic residual current detection circuit of the circuit detecting circuit in the circuit breaker of the present invention;

fig. 9 is a processing circuit (filtering process after sampling) of a detection circuit in the circuit breaker of the present invention;

figure 10 is a voltage reference circuit for the circuit breaker of the present invention;

fig. 11 is a comparison circuit of the detection circuit in the circuit breaker of the present invention;

fig. 12 is a driving circuit in the circuit breaker of the present invention;

fig. 13 is an electromagnetic residual current detection circuit of the circuit breaker of the present invention;

fig. 14 is a circuit diagram (controller) of an actuator in the circuit breaker of the present invention.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 14. The circuit breaker of the present invention is not limited to the description of the following embodiments.

The utility model provides a circuit breaker, includes insulating casing 1, be provided with the baffle in the insulating casing 1, the space of baffle in with the circuit breaker divides into first mounting groove and second mounting groove two parts, first mounting groove, second mounting groove are used for installing the looks utmost point or the neutral pole of circuit breaker, one side parallel of insulating casing 1 is equipped with the residual current analysis drive module 2 with insulating casing 1 integrated into one piece.

As shown in fig. 1 to 3, a circuit breaker includes an insulating case 1, a phase pole and a neutral pole of the circuit breaker are disposed in the insulating case 1, a partition board is arranged between the phase pole and the neutral pole, the partition board divides the interior of the insulating shell 1 into a polarity mounting groove and a neutral pole mounting groove, a residual current analysis driving module 2 which is integrally formed with the insulating shell 1 is arranged on one side in the insulating shell 1, the residual current analysis driving module 2, the phase pole of the circuit breaker and the neutral pole of the circuit breaker are arranged in parallel, the residual current analysis driving module 2 is positioned at one side close to the polarity mounting groove or one side close to the neutral pole mounting groove, FIGS. 1 and 2 show the residual current analyzing and driving module 2 disposed on a side adjacent to the neutral pole mounting groove, of course, the residual current analyzing driving module 2 may be disposed at a side adjacent to the phase electrode mounting groove as shown in fig. 2.

In order to save space, it is preferable that the phase electrode, the neutral electrode and the residual current analysis module occupy the same space of the insulating housing 1, as shown in fig. 1 to 3, the phase electrode, the neutral electrode and the residual current analysis module each occupy one third of the whole circuit breaker, and L in fig. 2 and 3 represents a width, so that the phase electrode, the neutral electrode and the residual current analysis module are respectively a module or are similar to a module, thereby facilitating standardized and modularized production. However, the thickness of the mutual inductor of the residual current fault monitor 4 of the existing circuit breaker is too thick, so that the phase pole, the neutral pole and the residual current analysis module can not respectively account for one third of the whole circuit breaker no matter the mutual inductor is installed on the neutral pole or the residual current analysis module.

One development of the invention is that the residual current fault monitor 4 comprises an electronic residual current fault monitor 41 and an electromagnetic residual current fault monitor 42, and the electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 are arranged in the residual current analysis driving module 2 or the second mounting groove serving as a neutral pole. The two residual current fault monitors are adopted to replace the existing residual current fault monitor with a larger volume, so that the thickness of the residual current fault monitor is reduced, and the residual current fault monitor is placed in the residual current analysis driving module 2 or the second mounting groove serving as the neutral pole, so that the residual current analysis driving module 2 can only occupy one third of the total width of the circuit breaker, the phase pole and the neutral pole can respectively occupy one third of the total width of the circuit breaker, the standardized and modularized production is facilitated, and the width of the first mounting groove and the second mounting groove in the insulating shell 1 of the circuit breaker and the width of the residual current analysis driving module 2 can be both a modulus or approximately a modulus.

The residual current fault monitor 4 comprises an electromagnetic residual current fault monitor 42 and an electronic residual current fault monitor 41, wherein one of the electromagnetic residual current fault monitor 42 and the other of the electromagnetic residual current fault monitor 41 is electromagnetic, and the other of the electromagnetic residual current fault monitor 42 and the electronic residual current fault monitor is electronic, and under the condition that a product has no power supply voltage, the electromagnetic residual current fault monitor 42 is used for detecting sinusoidal alternating current residual current and pulsating direct current residual current; under the condition that a product has power supply voltage (AC/DC 85-265V), the electronic residual current fault monitor 41 is used for monitoring residual currents such as smooth direct current, high-frequency sinusoidal alternating current residual current and composite residual current, and at the moment, the electromagnetic residual current fault monitor 42 does not work. The electromagnetic residual current fault monitor 42 and the electronic residual current fault monitor 41 are adopted to replace a large residual current fault detector, so that the electromagnetic residual current fault monitor can be integrated into a neutral electrode, namely a second mounting groove, or arranged in a residual current analysis driving module, different detection works are respectively executed, the optimization of a circuit board, the reduction of a board distribution design and the like are facilitated, the miniaturization design of the whole product is facilitated, the width of the whole product is reduced to 54mm, and the B-type 1PN or 2P RCB0 with smaller width is formed.

As shown in fig. 4 to 5, in the first embodiment of the circuit breaker according to the present invention, the first mounting groove and the second mounting groove are a polarity mounting groove and a neutral mounting groove for mounting a phase electrode and a neutral electrode of the circuit breaker, respectively, one side of the insulating housing 1 is provided with the residual current analysis driving module 2 integrally formed with the insulating housing 1, a residual current detection circuit board is disposed in the residual current analysis driving module 2, and the electromagnetic residual current fault monitor 42 and the electronic residual current fault monitor 41 are disposed in the neutral mounting groove of the neutral electrode. As a second embodiment of the circuit breaker of the present invention, the first mounting groove and the second mounting groove are respectively a polarity mounting groove and a neutral mounting groove for mounting a phase pole and a neutral pole of the circuit breaker, one side of the insulating housing 1 is provided with a residual current analysis driving module 2 integrally formed with the insulating housing 1, and the residual current analysis driving module 2 is provided with a residual current detection circuit board, an electromagnetic residual current fault monitor 42 and an electronic residual current fault monitor 41.

As a third embodiment of the circuit breaker of the present invention, the first mounting groove and the second mounting groove are both used for mounting a phase pole of the circuit breaker to form a two-pole circuit breaker, one side of the insulating housing 1 is provided with a residual current analysis driving module 2 integrally formed with the insulating housing 1, and a residual current detection circuit board, an electromagnetic residual current fault monitor 42, an electronic residual current fault monitor 41 and an electromagnetic relay 5 are arranged in the residual current analysis driving module 2.

As shown in fig. 4, in the first embodiment of the circuit breaker of the present invention, the phase pole of the circuit breaker includes a pair of phase terminals and a phase circuit structure electrically connected to the phase terminals; the pair of phase line terminals are respectively used as an upstream phase line terminal 31 and a downstream phase line terminal 32 and are oppositely arranged at two sides of the phase pole mounting groove, and a phase circuit structure is arranged in the phase pole mounting groove between the upstream phase line terminal 31 and the downstream phase line terminal 32; the phase circuit structure comprises a phase pole handle 33, a phase pole operating mechanism 34, a phase pole moving contact 35, an electromagnetic release 36, a thermal release 37 and an arc extinguish chamber 38; the phase pole handle 33 and the phase pole operating mechanism 34 are arranged at the upper part of the phase pole mounting groove, the phase pole handle 33 is connected with the phase pole operating mechanism 34 through a phase pole connecting rod, the phase pole moving contact 35 is connected with the lower part of the operating mechanism and is electrically connected with the thermal release 37 and the upstream phase line terminal 31, the electromagnetic release 36 is fixed at one side of the phase pole operating mechanism 34 and is positioned below the phase pole handle 33, and the phase pole fixed contact 39 matched with the phase pole moving contact 35 is fixed at one side of the electromagnetic release 36 close to the phase pole moving contact 35; a thermal trip 37 is disposed below the phase operating mechanism 34 and an arc chute 38 is disposed below the electromagnetic trip 36.

As shown in fig. 5, an electronic residual current fault monitor 41, an electromagnetic residual current fault monitor 42, an electromagnetic relay 5 and a tripping mechanism 6 which can be triggered by the electromagnetic relay 5 are also arranged in the neutral pole mounting groove; the neutral pole of the circuit breaker includes a pair of neutral terminals and a neutral circuit structure electrically connected to the neutral terminals; the pair of neutral line terminals are respectively used as an upstream neutral line terminal 71 and a downstream neutral line terminal 72 and are oppositely arranged at two sides of a neutral pole mounting groove, a neutral line circuit structure is arranged in the neutral pole mounting groove between the upstream neutral line terminal 71 and the downstream neutral line terminal 72, and the neutral line circuit structure comprises a neutral line handle 73, a neutral line moving contact assembly, an electromagnetic relay 5, an electronic residual current fault monitor 41 and an electromagnetic residual current fault monitor 42; the arc chute 38, the electromagnetic trip 36 and the thermal trip 37 are not provided in the neutral pole mounting groove. The neutral wire handle 73 and the tripping mechanism 6 are arranged at the upper part of the neutral pole mounting groove, the neutral wire handle 73 is coupled with the phase pole handle 33 and is connected with the tripping mechanism 6 through a neutral wire connecting rod, the tripping mechanism 6 is connected with the phase pole operating mechanism 34, the electromagnetic relay 5 is arranged at one side of the tripping mechanism 6 and is positioned below the neutral wire handle 73, and the phase pole operating mechanism 34 in the phase pole mounting groove is tripped through the tripping mechanism 6 when the electromagnetic relay 5 acts; an electronic type residual current fault monitor 41 and an electromagnetic type residual current fault monitor 42 are arranged below the electromagnetic relay 5 in parallel, and a neutral line static contact 76 matched with the neutral line moving contact component is arranged on one side, close to the neutral line moving contact component, of the electronic type residual current fault monitor 41 and the electromagnetic type residual current fault monitor 42.

The electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 each include a phase pole primary winding connected to the phase pole circuit, a neutral pole primary winding connected to the neutral pole circuit, and a secondary winding connected to the residual current detection circuit board. For example, the two ends of the primary winding of the phase pole of the electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 are respectively and electrically connected with the electromagnetic trip 36 and the downstream phase terminal 32 of the phase pole of the circuit breaker through the partition boards; the two ends of the neutral pole primary winding of the electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 are respectively and electrically connected with the neutral line static contact 76 and the downstream neutral line terminal 72.

The neutral moving contact assembly comprises a neutral moving contact 74, a driving arm 75, a bracket and a contact pressure spring 77; the neutral moving contact 74 and the bracket are coaxially arranged at the lower part of the driving arm 75, and the neutral moving contact 74 is electrically connected with the upstream neutral terminal 71; the driving arm 75 is mechanically coupled to the phase operating mechanism 34 through a hinge, the phase operating mechanism 34 drives the phase moving contact 35 and the neutral moving contact 74 to move, one end of the contact pressure spring 77 is fixed to a fixed shaft 78 in the insulating housing 1, and the other end of the contact pressure spring 77 is connected to the neutral moving contact 74.

Specifically, the neutral circuit structure further includes a residual current test circuit, where the residual current test circuit includes the downstream phase terminal 32, the spring 79, the resistor 8, the test button 9, the contact pressure spring 77 and the fixed shaft 78 thereof, and the contact pressure spring 77 and the fixed shaft 78 thereof are conductive elements of the residual current test circuit. A first end of spring 79 is electrically connected to downstream neutral terminal 72 through resistor 8, and a second end of spring 79 is detachably in contact with fixed shaft 78; the test button 9 is installed on the upper portion of the neutral pole mounting groove, and when the test button 9 is pressed down, the second end of the spring 79 is in contact with the fixed shaft 78, so that a residual circuit is generated to test whether the circuit breaker can be normally tripped.

As a second embodiment, it is needless to say that the electronic residual current fault monitor 41, the electromagnetic residual current fault monitor 42 and the electromagnetic relay 5 which are arranged in the neutral pole mounting groove may also be arranged in the residual current analysis driving module 2, and it is required to ensure that the electromagnetic relay 5 can be automatically reset when the electromagnetic relay 5 sends a tripping instruction; at the moment, a tripping mechanism 6 which can be triggered by the electromagnetic relay 5 and a neutral pole of the circuit breaker are arranged in the neutral pole mounting groove, and the neutral pole of the circuit breaker comprises a pair of neutral terminals and a neutral circuit structure which is electrically connected with the neutral terminals; the neutral circuit structure comprises a neutral handle 73, a neutral moving contact assembly and an electromagnetic relay 5; the neutral wire handle 73 and the tripping mechanism 6 are arranged at the upper part of the neutral pole mounting groove, the neutral wire handle 73 is connected with the tripping mechanism 6 through a neutral wire connecting rod, the neutral wire handle 73 is coupled with the phase pole handle 33 and is connected with the tripping mechanism 6 through the neutral wire connecting rod, the tripping mechanism 6 is connected with the phase pole operating mechanism 34, the neutral wire moving contact component is arranged at one side of the tripping mechanism 6, and a neutral wire fixed contact 76 matched with the neutral wire moving contact component is fixedly arranged in the neutral pole mounting groove.

The phase pole handle 33 is pushed, the phase pole operating mechanism 34 is driven to rotate clockwise through the phase pole connecting rod, the phase pole moving contact 35 moves towards the direction of the phase pole fixed contact 39, meanwhile, the phase pole operating mechanism 34 drives the driving arm 75 to drive the center line moving contact 74 to move towards the direction of the center line fixed contact 76 through the hinge shaft, and after the phase pole handle 33 is pushed to enable the phase pole moving contact 35 and the phase pole fixed contact 39, and the center line moving contact 74 and the center line fixed contact 76 to be in the closed positions, the tripping mechanism 6 can also complete energy storage and self-locking. When the phase pole moving contact 35 and the phase pole fixed contact 39, and the neutral line moving contact 74 and the neutral line fixed contact 76 are closed, if an overload or short-circuit fault occurs in the line, the thermal release 37 or the electromagnetic release 36 in the phase circuit structure automatically operates to release the phase pole operating mechanism 34, the phase pole moving contact 35 and the phase pole fixed contact 39, and the neutral line moving contact 74 and the neutral line fixed contact 76 are separated to break the fault current, and the release mechanism 6 cannot operate; if the residual current in the circuit reaches the threshold value or the test button 9 is pressed to push the second end of the spring 79 to contact with the fixed shaft 78 to form a test current, the electromagnetic relay 5 acts to unlock the tripping mechanism 6, the stored energy is released to drive the phase pole operating mechanism 34 to quickly unlock, and the phase pole moving contact 35 is separated from the phase pole fixed contact 39, and the neutral line moving contact 74 is separated from the neutral line fixed contact 76.

As another embodiment of the tripping mechanism 6, the tripping mechanism 6 may be a transmission rod acting on a latch of the phase pole operating mechanism 34, the transmission rod passes through the partition plate and is arranged corresponding to the latch of the phase pole operating mechanism 34, and the electromagnetic relay 5 is tripped by the phase pole operating mechanism 34 of the tripping mechanism 6 when operating.

Of course, as the third embodiment of the circuit breaker according to the present invention, the electronic residual current fault monitor 41, the electromagnetic residual current fault monitor 42, and the electromagnetic relay 5 are installed in the residual current analysis driving module 2, and the two-pole circuit breaker is formed by installing the phase poles of the circuit breaker in the second installation groove and the first installation groove, respectively. The phase poles of the circuit breaker respectively comprise a pair of phase line terminals and a phase circuit structure electrically connected with the phase line terminals; the pair of phase line terminals are respectively used as an upstream phase line terminal 31 and a downstream phase line terminal 32 and are oppositely arranged at two sides of the first mounting groove, and a phase circuit structure is arranged in the first mounting groove between the upstream phase line terminal 31 and the downstream phase line terminal 32; the phase circuit structure comprises a phase pole handle 33, a phase pole operating mechanism 34, a phase pole moving contact 35, an electromagnetic release 36, a thermal release 37 and an arc extinguish chamber 38; the phase pole handle 33 and the phase pole operating mechanism 34 are arranged at the upper part of the first mounting groove, the phase pole handle 33 is connected with the phase pole operating mechanism 34 through a phase pole connecting rod, the phase pole moving contact 35 is connected with the lower part of the operating mechanism and is electrically connected with the thermal release 37 and the upstream phase line terminal 31, the electromagnetic release 36 is fixed at one side of the phase pole operating mechanism 34 and is positioned below the phase pole handle 33, and the phase pole fixed contact 39 matched with the phase pole moving contact 35 is fixed at one side of the electromagnetic release 36 close to the phase pole moving contact 35; a thermal trip 37 is disposed below the phase operating mechanism 34 and an arc chute 38 is disposed below the electromagnetic trip 36. When the electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 are used as two-pole circuit breakers, neutral pole primary windings are not arranged any more, and the neutral pole primary windings are phase pole primary windings; the residual current fault monitor 4, the electromagnetic relay 5, the tripping mechanism 6 and the like and the residual current monitoring circuit board are all installed in the residual current analysis driving module 2.

The residual current fault monitor 4 comprises an electromagnetic residual current fault monitor 42 and an electronic residual current fault monitor 41, wherein the electromagnetic residual current fault monitor 42 and the electronic residual current fault monitor 41 are mutual inductors, a power supply loop of the circuit breaker penetrates through the mutual inductors of the electromagnetic residual current fault monitor 42 and the electronic residual current fault monitor 41, the electromagnetic residual current fault monitor 42 is an electromagnetic mutual inductor, the electronic residual current fault monitor 41 is an electronic mutual inductor, and the electromagnetic residual current fault monitor 42 is used for monitoring sine alternating current residual current and pulse direct current residual current under the condition that a product has no power supply voltage; under the condition that the product has mains voltage (AC/DC85 ~ 265V), electronic type residual current fault monitor 41 is used for monitoring residual currents such as smooth direct current residual current, high frequency sinusoidal alternating current residual current, compound residual current, and compound residual current includes that pulsating direct current residual current superposes smooth direct current residual current, the sinusoidal alternating current residual current in 1kHz superposes smooth direct current residual current, and electromagnetic type residual current fault monitor 42 is out of work this moment.

As shown in fig. 6, a residual current analyzing and comparing circuit is arranged in the residual current analyzing and driving module 2, the residual current analyzing and comparing circuit is used for driving the actuating mechanism to operate the circuit breaker to trip and power off, the residual current analyzing and comparing circuit includes an electronic detection circuit depending on the voltage of the power grid and an electromagnetic detection circuit independent of the voltage of the power grid, and the electronic detection circuit is used for detecting the circuit by the electronic residual current fault monitor 41 and mainly monitoring the ac fault residual current, the pulsating direct current residual current and the smooth direct current residual current below 1 kHz. The electronic detection circuit comprises a working power supply and a detection circuit powered by the working power supply, the detection circuit comprises an electronic residual current detection circuit, a processing circuit and a comparison circuit, the electronic residual current detection circuit collects fault signals and converts the fault signals into sampling output signals, the processing circuit amplifies the received sampling output signals to form preprocessing signals, the comparison circuit receives the preprocessing signals and compares the preprocessing signals with a set threshold value, and the comparison circuit outputs the fault signals and controls a driving circuit to enable an execution mechanism to operate a circuit breaker to trip; the electromagnetic residual current detection circuit is used for detecting power frequency alternating current residual current and pulsating direct current residual current, the electromagnetic residual current detection circuit is used for monitoring the circuit by the electromagnetic residual current fault monitor 42, and the electromagnetic residual current detection circuit outputs signals to enable the actuating mechanism driving circuit to operate the circuit breaker to be tripped.

According to the circuit breaker, the residual current analysis comparison circuit arranged in the residual current analysis driving module comprises an electronic detection circuit and an electromagnetic detection circuit, the electronic detection circuit and the electromagnetic detection circuit can work together, the electronic detection circuit and the electromagnetic detection circuit do not interfere with each other, and optimization and miniaturization design of a circuit board are facilitated.

Specifically, as shown in fig. 6, the residual current analysis driving module 2 includes a residual current analysis comparison circuit, the residual current analysis comparison circuit is used for driving the actuating mechanism to operate the circuit breaker to trip and power off, the residual current analysis comparison circuit includes an electronic detection circuit, an electromagnetic residual current detection circuit and a driving circuit, the electronic detection circuit operates the actuating mechanism through the driving circuit to enable the circuit breaker to trip and power off, and the electromagnetic detection circuit directly enables the circuit breaker to trip and power off through the actuating mechanism. The electronic detection circuit comprises an electronic residual current detection circuit, a processing circuit and a comparison circuit, the output end of the electronic residual current detection circuit is connected with the input end of the processing circuit, the output end of the processing circuit is connected with the input end of the comparison circuit, the output end of the comparison circuit is connected with the input end of the driving circuit, the electronic residual current detection circuit collects fault signals and converts the fault signals into sampling output signals, the processing circuit amplifies and/or filters the received sampling output signals to form preprocessing signals, the comparison circuit receives the preprocessing signals and compares the preprocessing signals with a set threshold value, the comparison circuit outputs the fault signals and controls the driving circuit to enable the actuating mechanism to operate the circuit breaker to trip and power off, certainly, the electronic residual current detection circuit can be connected with a diode and a voltage-dividing resistor to avoid the output signal from interfering with components in the electromagnetic residual current detection circuit. The output end of the electromagnetic residual current detection circuit is directly connected with the actuating mechanism to enable the circuit breaker to be tripped and powered off. The working power supply comprises a DC switching power supply, the DC switching power supply is used for reducing the voltage of a power grid and forming positive and negative bipolar power supply output through a self-feedback balancing circuit, and a voltage stabilizing circuit is preferably connected between the DC switching power supply and the residual current analysis and comparison circuit. The DC switching power supply forms a working power supply for DC power supply of the residual current analysis circuit under the action of the rectifier diode, the safety resistor and the filter circuit; one end of the rectifier diode is connected with the L pole of the power supply, the other end of the rectifier diode is connected with one end of the filter circuit, one end of the safety resistor is connected with the N pole of the power supply, the other end of the safety resistor is connected with the filter circuit, the output end of the filter circuit is connected with the DC switching power supply, and a surge resistor is connected between the L pole of the power supply and the N pole of the power supply in parallel; the DC switching power supply comprises a DC/DC switching power supply chip, the output end of the DC/DC switching power supply chip is connected with a voltage stabilizing circuit, and the model of the DC/DC switching power supply chip UP1 is LNK 304/306. In the detection circuit of the electronic detection circuit, namely from the electronic residual current detection circuit to the processing circuit, only four operational amplifiers are adopted to realize all functions, the cost is low, the loss is small, in fig. 8-12, the four operational amplifiers are respectively U1, U2, U3 and U4, wherein U1A and U1B belong to the same operational amplifier U1, similarly, U2A and U2B belong to the operational amplifier U2, U3A and U3B belong to the operational amplifier U3, and U4A and U4B belong to the operational amplifier U4.

The electronic detection circuit and the electromagnetic residual current detection circuit can work together without mutual interference, and a complex conversion circuit is not needed. When the voltage of the power grid exists, the electromagnetic residual current detection circuit and the electronic detection circuit work together, if the residual current is alternating current residual current or pulse direct current residual current of the power grid frequency, the electronic detection circuit can output a fault signal to the driving circuit to enable the execution mechanism to operate the circuit breaker or directly drive the execution mechanism to enable the circuit breaker to operate by the electromagnetic residual current detection circuit, and the two signals cannot interfere with each other; if the residual current is smooth direct current or high-frequency residual current, only the electronic detection circuit outputs a fault signal to the driving circuit, if the electronic detection circuit is connected with a diode and a divider resistor, the fault signal cannot influence the polarity capacitor in the electromagnetic residual current detection circuit after passing through a backward diode and the divider resistor, and meanwhile, the input signal of the detection circuit is weak, so that the normal work of the electronic detection circuit is not influenced, and the execution mechanism is not driven; if the voltage of the power grid does not exist, the electronic detection circuit does not work and does not interfere with the electromagnetic residual current detection circuit, and the electromagnetic residual current detection circuit detects the alternating current residual current and the pulse direct current residual current of the power grid frequency. It should be noted that the operation principle is consistent when detecting the type B residual current, and the present invention only lists several types of type B residual currents.

The working power supply for supplying power to the residual current analyzing and comparing circuit is shown in fig. 7, and maintains the stability of the output voltage by a method of losing a switching period. The working power supply comprises a DC switching power supply chip UP1, and the model of the DC/DC switching power supply chip UP1 is LNK 304/306; the diode DP3 and the diode DP4 are used as rectifier diodes, the RP4 is used as a safety resistor, the anode of the diode DP3 is connected with the pole L of a power supply and one end of a piezoresistor RV4, the cathode of the diode DP3 is connected with a filter circuit, the cathode of the diode DP4 is connected with the pole N of the power supply and the other end of the piezoresistor RV4, the anode of the diode DP4 is connected with one end of a safety resistor RP4, and the other end of the safety resistor RP4 is connected with the filter circuit. The filter circuit comprises a capacitor CP4, a capacitor CP5 and an inductor LP2, wherein the cathode of a diode DP3 is connected with the anode of the capacitor CP4 and one end of the inductor LP2, the other end of the inductor LP2 is connected with a drain terminal D of a DC switching power supply chip UP1, and the cathodes of the capacitor CP4 and the capacitor CP5 and the other end of a resistor RP4 are connected with the cathode VSS of a power supply. The voltage stabilizing circuit comprises a diode DP5, a diode DP6, a capacitor CP1, a capacitor CP2, a capacitor CP3, a resistor RP1, a resistor RP2, a resistor RP3 and an inductor LP1, wherein one end of the capacitor CP1 is connected with a side pole pin BP of a DC switching power supply chip UP1, the other end of the capacitor CP1 is connected with a plurality of source pole pins S of the DC switching power supply chip UP1, a feedback pin FB of the DC switching power supply chip UP1 is respectively connected with one ends of the resistor RP1 and the resistor RP2, the other end of the resistor RP1 is respectively connected with an anode of a capacitor CP3 and a cathode of a diode DP5, the other end of the resistor RP2 is connected with the other end of the capacitor CP1 and one end of an inductor LP1, a cathode of the capacitor CP3 and a cathode of the diode DP6 are simultaneously connected with one end of the inductor LP1, the other end of the inductor LP1 is connected with a positive pole of a power supply, a positive pole VCC of the diode DP5, a positive pole of the capacitor CP2 and a positive pole of the resistor CP 733 are simultaneously connected with a positive pole of the power supply 3, the anode of the diode DP6, the cathode of the capacitor CP2 and the other end of the resistor RP3 are all connected with the power supply cathode VSS. The voltage feedback pin FB of the DC switching power supply chip UP1 is respectively connected with a resistor RP1 and a resistor RP2, and the resistor RP1 and the resistor RP2 form a resistor voltage divider for detecting and stabilizing the voltage of the capacitor CP3, so that the voltage of the voltage feedback pin FB of the DC switching power supply chip UP1 is a standard value, and 24V working voltage is provided for the residual current analysis and comparison circuit.

As shown in fig. 8, the electronic residual current detection circuit of the electronic detection circuit includes a transformer connector JP1, an electronic residual current fault monitor 41, a TVS surge-resistant protection absorption tube VR2, a transistor Q1, a transistor Q2, a capacitor C1, a capacitor C2, a capacitor C10, a capacitor C11, a resistor R2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R10, a resistor R11, a resistor R12, an operational amplifier U1A and an operational amplifier U1B; the mutual inductor connector JP1 is connected on a detection line, the mutual inductor connector JP1 is used for connecting an electronic residual current fault monitor 41 and an electromagnetic residual current fault monitor 42, four connecting ends are arranged on the mutual inductor connector JP1, the first connecting end and the second connecting end of the mutual inductor connector JP1 are connected with the electromagnetic residual current fault monitor 42, the electromagnetic residual current fault monitor 42 is an electromagnetic mutual inductor, one secondary winding output end CT1 of the electromagnetic residual current fault detector 42 and the other secondary winding output end CT2 of the electromagnetic residual current fault detector 42 are connected with the first connecting end and the second connecting end of the mutual inductor connector JP1, the third connecting end and the fourth connecting end of the mutual inductor connector JP1 are used for connecting the electronic residual current fault monitor 41, and the electronic residual current fault monitor 41 is an electronic mutual inductor, the fourth connecting end of the transformer connector JP1, namely one end of the winding of the electronic residual current fault monitor 41, is connected with one end of a TVS anti-surge-shock protection absorbing tube VR2, the emitter of a triode Q1 and the emitter of a triode Q2, the other end of the TVS anti-surge-shock protection absorbing tube VR2 and the third connecting end of the transformer connector JP1, namely the other end of the winding of the electronic residual current fault monitor 41, are connected with one end of a resistor R2, the other end of the resistor R2 is connected with the positive electrode of a capacitor C1, and the negative electrode of the capacitor C1 is connected with the negative electrode VSS of the power supply; a third connecting end of the transformer connector JP1 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of a TVS surge-impact-resistant protection absorption tube VR2 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of a resistor R2 and one end of a resistor R1 are connected with a positive electrode of a capacitor C1, the other end of a resistor R1 is grounded GND, one end of the resistor R3 is connected with a resistor R2, the other end of the resistor R3 is connected with a reverse input end of an operational amplifier U1A, a forward input end of the operational amplifier U1A is connected with one end of the resistor R4, the other end of the resistor R4 is grounded GND, an output end of the operational amplifier U1A is connected with one end of a resistor R6, the other end of the resistor R6 is connected with a base of a triode Q1 and a base of a triode Q2, a collector of a triode Q1 is connected with a positive electrode of a power supply, and a collector of a Q2 is connected with a negative electrode VSS; the inverting input end of the operational amplifier U1B is connected with the output end LD of the operational amplifier U1B, the forward input end of the operational amplifier U1B is connected with one end of a resistor R12 and a capacitor C11, the other end of the capacitor C11 is grounded to GND, the other end of the resistor R12 is connected with one end of a resistor R11 and one end of a capacitor C10, the other end of a capacitor C10 is respectively connected with the other ends of a resistor R10, a resistor R5 and a resistor R5 to GND through a resistor R4, the other end of the resistor R10 is grounded to GND through a resistor R11, and the two ends of the capacitor C2 are connected to the two ends of the resistor R6 in parallel. In this embodiment, the electronic residual current fault monitor 41 and the electromagnetic residual current fault monitor 42 are connected to the detection line through the transformer connector JP1, which is convenient for the connection of the line, and certainly, the transformer connector JP1 may not be used.

As shown in fig. 9 and 10, the processing circuit is configured to filter a residual current signal monitored by the electronic residual current fault monitor 41, the processing circuit of fig. 9 includes an operational amplifier U2A, a capacitor C12, a capacitor C13, a resistor R13, and a resistor R14, a forward input end of the operational amplifier U2A is connected to one end of the resistor R14 and one end of the capacitor C13, an output end Lw of the operational amplifier U2A and one end of the capacitor C12 are both connected to an inverting input end of the operational amplifier U2A, the other end of the resistor 14 and the other end of the capacitor C12 are both connected to one end of the resistor R13, the other end of the resistor R13 is connected to an output end of the electronic residual current detection circuit, that is connected to the output end LD of the operational amplifier U1B, and the other end of the capacitor C13 is grounded; fig. 10 is a voltage reference circuit for providing a voltage reference to the circuits of fig. 8 and 12, wherein the circuits include VCC (+12V), GND (-12V), and VSS (0V), and are capable of providing a current with a stable output voltage when a process, a power supply voltage, and a temperature change occur, and the voltage reference circuit includes an operational amplifier U2B, a resistor R7, a resistor R8, a capacitor C3, and a capacitor C4, wherein a forward input terminal of the operational amplifier U2B is connected to one ends of the resistor R8, the resistor R9, and the capacitor C4, an output terminal of the operational amplifier U2B, and one ends of the resistor R7 are connected to an inverted output terminal of the operational amplifier U2B, one end of the capacitor C3 is connected to the other end of the resistor R7 and to GND, the other end of the capacitor C3 is connected to a negative power supply terminal VSS, the other ends of the resistor R8 and the capacitor C4 are connected to a negative power supply terminal VSS, and the other end of the resistor R9 is connected to a positive power supply terminal VCC.

As shown in fig. 11, the comparison circuit includes an operational amplifier U3A, an operational amplifier U3B, a diode D1, a diode D2, a resistor R15, a resistor R16, a resistor R17, a resistor R18 and a resistor R19, a forward input terminal of the operational amplifier U3A is grounded, a reverse input terminal of the operational amplifier U3A is connected to a resistor R15, one end of the resistor R16 and a cathode of the diode D1, and an output terminal of the operational amplifier U3A is connected to an anode of the diode D1 and a cathode of the diode D2; the forward output end of the operational amplifier U3B is grounded GND, the reverse input end of the operational amplifier U3B is connected with one end of a resistor R17, a resistor R18 and a resistor R19, and the output end QL of the operational amplifier U3B is connected with the other end of a resistor R19; the anode of the diode D2 and the other end of the resistor R16 are connected to the other end of the resistor R18, and the other end of the resistor R15 and the other end of the resistor R17 are connected to the output terminal of the processing circuit, that is, to the output terminal Lw of the operational amplifier U2A.

As shown in fig. 12, the driving circuit includes an operational amplifier U4A, an operational amplifier U4B, a resistor R21, a resistor R27, a resistor R28, a resistor R28T, a resistor R29, a resistor R29T, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, an adjustable resistor VR1, a capacitor C20, a transistor Q3, and a controller P1; the positive input end of the operational amplifier U4A is connected with one end of a capacitor C16 and one end of a resistor R21, the output end of the operational amplifier U4A is connected with the anode of a diode D5, and the other end of the resistor R21 is connected with the output end of a comparison circuit, namely, the output end QL of an operational amplifier U3B of the comparison circuit; one end of a resistor R29T and one end of a resistor R29 are connected with a power supply positive pole VCC, the other end of a resistor R29T is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28T, the other end of a resistor R29 is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28, the other ends of a resistor R28T and a resistor R28 are connected with a collector of a triode Q3, an emitter of the triode Q3 is connected with a power supply negative pole VSS, one end of the resistor R33 is connected with the power supply positive pole VCC, the other end of the resistor R33 is connected with a negative pole of an adjustable resistor VR1, the positive pole of the adjustable resistor VR1 is connected with one end of the resistor R34 and the base of the triode Q3, and the other end of the resistor R34 is connected with the power supply negative pole VSS; the reverse input end of the operational amplifier U4B is grounded GND, the output end of the operational amplifier U4B is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the controller P1 as an actuator through the resistor R32, that is, to the terminal QD of the controller P1, the forward input end of the operational amplifier U4B is connected to one end of the resistor R30, the other end of the resistor R30 is connected to one end of the resistor R27, the resistor R31 and the capacitor C20, the other end of the resistor R27 is connected to the cathode of the diode D5, and the other end of the resistor R31 and the other end of the capacitor C20 are connected to the cathode VSS of the power supply.

The electromagnetic residual current detection circuit is used for processing residual current signals monitored by the electromagnetic residual current fault monitor 42, the electromagnetic residual current detection circuit directly drives the actuating mechanism to trip and power off the circuit breaker after signal processing, and the electromagnetic residual current detection circuit is shown in fig. 13 and comprises a capacitor C21, a capacitor C22, a resistor R34, a resistor R36, a resistor R37, a diode D7, a diode D8, an N-MOS field effect transistor Q4 and a controller P1; one end of the resistor R36 is connected with a power supply positive pole VCC, the other end of the resistor R36 is connected with one end of a resistor R37 and a gate G of an N-MOS field effect transistor Q4, a drain D of the N-MOS field effect transistor Q4 is connected with one end of a resistor R35, a source S of the N-MOS field effect transistor Q4 is connected with the other end of the resistor R37 and the other end of the resistor R35, one end of the resistor R35 connected with the drain D of the N-MOS field effect transistor Q4 is connected with one secondary winding output end CT1 of the electromagnetic transformer of the electromagnetic residual current fault monitor 42, and one end of the resistor R35 connected with the source S of the N-MOS field effect transistor Q4 is connected with the other secondary winding output end CT2 of the electromagnetic transformer of the electromagnetic residual current fault monitor 42; the anode of the diode D7 and the cathode of the diode D8 are both connected to the anode of the capacitor C22, the cathode of the diode D7 and the anode of the diode D8 are both connected to the anode of the capacitor C21, the anode of the capacitor C22 is connected to the drain D of the N-MOS fet Q4, the anode of the capacitor C21 is connected to the source S of the N-MOS fet Q4 and to the ground GND, and the cathode of the capacitor C21 and the cathode of the capacitor C22 are connected to the actuator, that is, to the terminal QD of the controller P1 as the actuator.

As shown in fig. 14, the actuator includes a controller P1, a controller P1 is an EMR controller, EMR is the electromagnetic relay 5 in fig. 5, and the EMR controller includes a terminal QD and a terminal connected to ground GND. The electronic detection circuit enables the actuating mechanism to operate the circuit breaker to release and cut off the power through the driving circuit, and the electromagnetic residual current detection circuit directly outputs a fault signal to drive the actuating mechanism EMR to trigger the tripping action of the circuit breaker.

The residual current analyzing and comparing circuit arranged in the residual current analyzing and driving module 2 can be used for enabling the circuit breaker to be tripped and cut off when various residual currents such as sine alternating current residual current, pulsating direct current residual current, smooth direct current residual current, composite residual current, pulsating direct current residual current and smooth direct current residual current, alternating current residual current and smooth direct current residual current, high-frequency sine alternating current residual current and the like in a load circuit reach action threshold values.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A circuit breaker, includes actuating mechanism and residual current analysis comparison circuit who is used for driving actuating mechanism, its characterized in that: the residual current analysis comparison circuit comprises an electronic detection circuit, an electromagnetic residual current detection circuit and a drive circuit; the electronic detection circuit is used for monitoring the circuit by an electronic residual current fault monitor (41), the electronic detection circuit comprises a working power supply and a detection circuit powered by the working power supply, the detection circuit comprises an electronic residual current detection circuit, a processing circuit and a comparison circuit, the electronic residual current detection circuit collects fault signals and converts the fault signals into sampling output signals, the processing circuit amplifies the received sampling output signals to form preprocessing signals, the comparison circuit receives the preprocessing signals and compares the preprocessing signals with a set threshold value, and the comparison circuit outputs the fault signals and controls a driving circuit to enable an execution mechanism to operate a circuit breaker to trip; the electromagnetic residual current detection circuit is used for monitoring the circuit by an electromagnetic residual current fault monitor (42), and the electromagnetic residual current detection circuit enables an actuating mechanism to operate the circuit breaker to trip through an output signal.

2. The circuit breaker of claim 1, wherein: the electromagnetic residual current fault monitor (42) is used for monitoring residual current under the condition of no power supply voltage; under the condition that a product has a power supply voltage, the electronic residual current fault monitor (41) is used for monitoring residual current, and at the moment, the electromagnetic residual current fault monitor (42) does not work.

3. The circuit breaker of claim 1, wherein: the circuit breaker comprises an insulating shell (1), wherein a partition plate is arranged in the insulating shell (1), the partition plate divides the space in the circuit breaker into a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are used for mounting a phase electrode or a neutral electrode of the circuit breaker, a residual current analysis driving module (2) which is integrally formed with the insulating shell (1) is arranged on one side of the insulating shell (1) in parallel, a residual current detection circuit board is arranged in the residual current analysis driving module (2), and a residual current analysis comparison circuit is arranged on the residual current detection circuit board; the electronic residual current fault monitor (41) and the electromagnetic residual current fault monitor (42) are arranged in the residual current analysis driving module (2) or the second mounting groove.

4. The circuit breaker of claim 1, wherein: the working power supply comprises a DC switch power supply, a voltage stabilizing circuit is connected between the DC switch power supply and the residual current analysis comparison circuit, the DC switch power supply further comprises a rectifier diode, a safety resistor and a filter circuit, one end of the rectifier diode is connected with the L pole of the power supply, the other end of the rectifier diode is connected with one end of the filter circuit, one end of the safety resistor is connected with the N pole of the power supply, the other end of the safety resistor is connected with the filter circuit, the output end of the filter circuit is connected with the DC switch power supply, a surge resistor is connected between the L pole of the power supply and the N pole of the power supply in parallel, the DC switch power supply comprises a DC/DC switch power supply chip, and the output end of the DC/DC switch power supply chip is connected with the voltage stabilizing circuit.

5. The circuit breaker of claim 1, wherein: the electromagnetic residual current detection circuit comprises a capacitor C21, a capacitor C22, a resistor R34, a resistor R36, a resistor R37, a diode D7, a diode D8, an N-MOS field effect transistor Q4 and a controller P1; one end of the resistor R36 is connected with a power supply positive pole VCC, the other end of the resistor R36 is connected with one end of a resistor R37 and a gate G of an N-MOS field effect transistor Q4, a drain D of the N-MOS field effect transistor Q4 is connected with one end of a resistor R35, a source S of the N-MOS field effect transistor Q4 is connected with the other end of the resistor R37 and the other end of the resistor R35, one end of the resistor R35 connected with the drain D of the N-MOS field effect transistor Q4 is connected with one secondary winding output end CT1 of the electromagnetic transformer of the electromagnetic residual current fault monitor (42), and one end of the resistor R35 connected with the source S of the N-MOS field effect transistor Q4 is connected with the other secondary winding output end CT2 of the electromagnetic transformer of the electromagnetic residual current fault monitor (42); the anode of the diode D7 and the cathode of the diode D8 are both connected to the anode of the capacitor C22, the cathode of the diode D7 and the anode of the diode D8 are both connected to the anode of the capacitor C21, the anode of the capacitor C22 is connected to the drain D of the N-MOS fet Q4, the anode of the capacitor C21 is connected to the source S of the N-MOS fet Q4 and to the ground GND, and the cathode of the capacitor C21 and the cathode of the capacitor C22 are connected to the actuator.

6. The circuit breaker of claim 1, wherein: the electronic residual current detection circuit comprises a TVS anti-surge-shock protection absorption tube VR2, a triode Q1, a triode Q2, a capacitor C1, a capacitor C2, a capacitor C10, a capacitor C11, a resistor R2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R10, a resistor R11, a resistor R12, an operational amplifier U1A and an operational amplifier U1B; one end of a winding of the electronic residual current fault monitor (41) is connected with one end of a TVS anti-surge-shock protection absorption tube VR2, an emitter of a triode Q1 and an emitter of a triode Q2, the other end of the TVS anti-surge-shock protection absorption tube VR2 and the other end of the winding of the electronic residual current fault monitor (41) are connected with one end of a resistor R2, the other end of the resistor R2 is connected with the positive electrode of a capacitor C1, and the negative electrode of the capacitor C1 is connected with the negative electrode VSS of a power supply; the other winding of the electronic transformer of the electronic residual current fault monitor 41 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the TVS surge-impact-resistant protection absorbing tube VR2 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R2, one end of a resistor R1 is connected with the positive electrode of a capacitor C1, the other end of a resistor R1 is grounded to GND, one end of a resistor R3 is connected with a resistor R2, the other end of the resistor R3 is connected with the reverse input end of an operational amplifier U1A, the forward input end of the operational amplifier U1A is connected with one end of a resistor R4, the other end of a resistor R4 is grounded to GND, the output end of the operational amplifier U1A is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the base of a triode Q1 and the base of a triode Q2, the collector of the triode Q1 is connected with a power supply positive electrode VCC, and the collector of the triode Q2 is connected with; an inverting input terminal of the operational amplifier U1B is connected to the output terminal LD of the operational amplifier U1B, a forward input terminal of the operational amplifier U1B is connected to one end of the resistor R12 and the capacitor C11, the other end of the capacitor C11 is connected to GND, the other end of the resistor R12 is connected to one end of the resistor R11 and one end of the capacitor C10, the other end of the capacitor C10 is connected to the other end of the resistor R10, the other end of the resistor R5 and the other end of the resistor R5 are connected to GND through the resistor R4, the other end of the resistor R10 is connected to GND through the resistor R11, and both ends of the capacitor C2 are connected in parallel to both ends of the resistor R6.

7. The circuit breaker of claim 1, wherein: the processing circuit comprises an operational amplifier U2A, a capacitor C12, a capacitor C13, a resistor R13 and a resistor R14, wherein a forward input end of the operational amplifier U2A is connected with one end of a resistor R14 and one end of a capacitor C13, an output end Lw of the operational amplifier U2A and one end of a capacitor C12 are both connected with an inverted input end of the operational amplifier U2A, the other end of a resistor 14 and the other end of a capacitor C12 are both connected with one end of the resistor R13, the other end of the resistor R13 is connected with an output end of the electronic residual current detection circuit, and the other end of the capacitor C13 is grounded.

8. The circuit breaker of claim 1, wherein: the comparison circuit comprises an operational amplifier U3A, an operational amplifier U3B, a diode D1, a diode D2, a resistor R15, a resistor R16, a resistor R17, a resistor R18 and a resistor R19, wherein the positive input end of the operational amplifier U3A is grounded, the reverse input end of the operational amplifier U3A is connected with one end of the resistor R15 and one end of the resistor R16 and the negative electrode of the diode D1, and the output end of the operational amplifier U3A is connected with the positive electrode of the diode D1 and the negative electrode of the diode D2; the forward output end of the operational amplifier U3B is grounded GND, the reverse input end of the operational amplifier U3B is connected with one end of a resistor R17, a resistor R18 and a resistor R19, and the output end QL of the operational amplifier U3B is connected with the other end of a resistor R19; the anode of the diode D2 and the other end of the resistor R16 are connected to the other end of the resistor R18, and the other end of the resistor R15 and the other end of the resistor R17 are connected to the output terminal of the processing circuit.

9. The circuit breaker of claim 1, wherein: the driving circuit comprises an operational amplifier U4A, an operational amplifier U4B, a resistor R21, a resistor R27, a resistor R28, a resistor R28T, a resistor R29, a resistor R29T, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, an adjustable resistor VR1, a capacitor C20 and a triode Q3; the positive input end of the operational amplifier U4A is connected with one end of a capacitor C16 and one end of a resistor R21, the output end of the operational amplifier U4A is connected with the anode of a diode D5, and the other end of the resistor R21 is connected with the output end of a comparison circuit; one end of a resistor R29T and one end of a resistor R29 are connected with a power supply positive pole VCC, the other end of a resistor R29T is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28T, the other end of a resistor R29 is connected with a reverse input end of an operational amplifier U4A and one end of a resistor R28, the other ends of a resistor R28T and a resistor R28 are connected with a collector of a triode Q3, an emitter of the triode Q3 is connected with a power supply negative pole VSS, one end of the resistor R33 is connected with the power supply positive pole VCC, the other end of the resistor R33 is connected with a negative pole of an adjustable resistor VR1, the positive pole of the adjustable resistor VR1 is connected with one end of the resistor R34 and the base of the triode Q3, and the other end of the resistor R34 is connected with the power supply negative pole VSS; the inverting input terminal of the operational amplifier U4B is grounded GND, the output terminal of the operational amplifier U4B is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the actuator through the resistor R32, the forward input terminal of the operational amplifier U4B is connected to one end of the resistor R30, the other end of the resistor R30 is connected to one end of the resistor R27, the resistor R31 and the capacitor C20, the other end of the resistor R27 is connected to the cathode of the diode D5, and the other end of the resistor R31 and the other end of the capacitor C20 are connected to the cathode VSS of the power supply.

10. The circuit breaker of claim 7, wherein: the processing circuit further comprises a voltage reference circuit which is used when power is supplied by a power grid voltage and comprises an operational amplifier U2B, a resistor R7, a resistor R8, a capacitor C3 and a capacitor C4, wherein a forward input end of the operational amplifier U2B is connected with one end of the resistor R8, the resistor R9 and one end of the capacitor C4, an output end of the operational amplifier U2B and one end of the resistor R7 are connected with an inverted output end of the operational amplifier U2B, one end of the capacitor C3 is connected with the other end of the resistor R7 and grounded GND, the other end of the capacitor C3 is connected with a negative power supply electrode VSS, the other ends of the resistor R8 and the capacitor C4 are connected with a negative power supply electrode VSS, and the other end of the resistor R9 is.