CN113394744A - Residual current protection circuit breaker - Google Patents
Residual current protection circuit breaker Download PDFInfo
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- CN113394744A CN113394744A CN202110900234.1A CN202110900234A CN113394744A CN 113394744 A CN113394744 A CN 113394744A CN 202110900234 A CN202110900234 A CN 202110900234A CN 113394744 A CN113394744 A CN 113394744A
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- circuit breaker
- resistor
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- diode
- tripping
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
- H02H3/335—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Breakers (AREA)
Abstract
The invention discloses a residual current protection circuit breaker, which relates to the technical field of circuit breakers and comprises a tripping module, a mechanical fault detection module, a tripping fault detection module, a test detection module, a residual current detection module, a main control module, an alarm module and a communication module; the tripping device comprises a tripping module, a mechanical fault detection module, a tripping coil, a test detection module, a main control module and a communication module, wherein the tripping module is used for controlling tripping and closing, the mechanical fault detection module is used for tripping, the tripping fault detection module is used for detecting a tripping coil, the test detection module is used for artificially controlling and sending a residual current signal, the residual current detection module is used for detecting the residual current in a circuit, the main control module is used for receiving and processing the signal, outputting a control signal and a data signal, and the communication module is used for communicating with a user terminal. The residual current protection circuit breaker is provided with the circuit breaker self-tripping and the tripping coil for detection, so that the safety of the circuit breaker is improved, and meanwhile, a worker can remotely control the circuit breaker to periodically perform self-detection, so that the reliability of the circuit breaker is ensured.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a residual current protection circuit breaker.
Background
With the rapid development of the smart grid and the energy internet, social progress is promoted, but a human body contact accident is always an important problem in power utilization safety, and the circuit breaker is an important protection device when equipment in the low-voltage grid leaks electricity and human body gets an electric shock, wherein, the residual current protection circuit breaker is an important low-voltage protection electric appliance, but at present, the traditional circuit breaker with the residual current protection function cannot detect the self residual current protection function, cannot know whether the residual current protection function of the circuit breaker is normal or not, so that safety hidden dangers are brought when the circuit breaker is used, and meanwhile, with the development of the intelligent information era, the intelligent information circuit breaker becomes a development trend, the intelligent circuit breaker can intelligently detect the residual current and control the circuit breaker, the safety and the reliability of the circuit breaker are improved, and the waste of human resources is greatly reduced, however, the loss of the circuit breaker in function detection at regular intervals also brings great potential safety hazard to the intelligent circuit breaker.
Disclosure of Invention
The embodiment of the invention provides a residual current protection circuit breaker, which aims to solve the problems in the background technology.
According to the embodiment of the invention, the residual current protection circuit breaker is provided, and comprises a tripping module, a mechanical fault detection module, a tripping fault detection module, a test detection module, a residual current detection module, a main control module, an alarm module and a communication module;
the tripping module is used for adjusting the voltage input into a tripping coil of the circuit breaker, and is used for disconnecting a switch of a power supply and outputting a voltage signal;
the mechanical fault detection module is used for detecting the voltage signal output by the tripping module and outputting a pulse signal, and is used for counting the pulse signal and outputting the voltage signal;
the tripping fault detection module is used for detecting the working condition of a tripping coil of the circuit breaker and outputting a voltage signal;
the test detection module is used for sending a residual current signal under artificial control;
the residual current detection module is used for detecting the residual current in the circuit protected by the circuit breaker;
the main control module is used for receiving and processing voltage signals output by the mechanical fault detection module and the tripping fault detection module and residual current signals output by the test detection module and outputting control signals and data signals;
the alarm module is used for receiving the control signal output by the main control module and sending an alarm;
and the communication module is used for receiving the data signal output by the main control module and communicating with the user terminal.
Compared with the prior art, the invention has the beneficial effects that: the residual current protection circuit breaker adopts residual current detection protection, and simultaneously, the self-provided circuit breaker self-tripping coil is used for detecting, the working condition of the circuit breaker is judged by detecting the tripping action of the circuit breaker and the quality of the opening of the circuit breaker, the safety performance of the circuit breaker is improved, meanwhile, a worker can remotely control the circuit breaker to periodically perform self-detection, the safety and the reliability of the circuit breaker are ensured to a great extent, and the waste of human resources is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a residual current circuit breaker according to an embodiment of the present invention.
Fig. 2 is a schematic connection block diagram of a mechanical fault detection module and a trip module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a residual current protection circuit breaker according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a trip fault detection module according to an embodiment of the invention.
Fig. 5 is a circuit diagram of a test detection module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a residual current protection circuit breaker, which includes a trip module 1, a mechanical fault detection module 2, a trip fault detection module 3, a test detection module 4, a residual current detection module 5, a main control module 6, an alarm module 7, and a communication module 8;
specifically, the trip module 1 is configured to adjust a voltage input to a trip coil of a circuit breaker, and is configured to disconnect a switch of a power supply and output a voltage signal; the first end of the tripping module 1 is connected with the first end of the mechanical fault detection module 2, the second end of the tripping module 1 is connected with the first end of the tripping fault detection module 3, and the third end of the tripping module 1 is connected with the first end of the test detection module 4;
the mechanical fault detection module 2 is used for detecting the voltage signal output by the tripping module 1 and outputting a pulse signal, and is used for counting the pulse signal and outputting the voltage signal; the second end of the mechanical fault detection module 2 is connected with the first end of the main control module 6;
the tripping fault detection module 3 is used for detecting the working condition of a tripping coil of the circuit breaker and outputting a voltage signal; the second end of the tripping fault detection module 3 is connected with the second end of the main control module 6;
the test detection module 4 is used for artificially controlling and sending a residual current signal; the second end of the test detection module is connected with the third end of the main control module 6;
the residual current detection module 5 is used for detecting residual current in a circuit protected by the circuit breaker; the second end of the residual current detection module 5 is connected with the fourth end of the main control module 6;
the main control module 6 is used for receiving and processing the voltage signals output by the mechanical fault detection module 2 and the tripping fault detection module 3 and the residual current signals output by the test detection module 4, and outputting control signals and data signals; the fifth end of the main control module 6 is connected with the fourth end of the tripping module 1;
the alarm module 7 is used for receiving the control signal output by the main control module 6 and sending an alarm; the alarm module 7 is connected with the sixth end of the main control module 6;
the communication module 8 is used for receiving the data signal output by the main control module 6 and communicating with a user terminal; the communication module 8 is connected with the seventh end of the main control module 6.
In a specific embodiment, the trip module 1 may change a voltage signal input to a trip coil of the circuit breaker by using a voltage converter; the mechanical fault detection module 2 can detect the voltage signal output by the tripping coil of the circuit breaker by adopting a voltage detection mode, count the times of the detected voltage signal by adopting a counting mode, and detect the tripping condition of the circuit breaker by matching with a set voltage signal detection threshold; the tripping fault detection module 3 can adopt a capacitor to monitor the voltage condition of the tripping coil of the circuit breaker, and transmit a detection signal to the main control module 6 by utilizing an optical coupler, or detect the voltage of the tripping coil of the circuit breaker by adopting a comparator mode, and directly transmit a voltage signal output by the comparator to the main control module 6; the test detection module 4 can adopt a mode of switching control of a triode or a mode of controlling a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and manually inputs a residual voltage signal source to the main control module 6 to prompt the residual current protection circuit breaker to carry out self-detection; the residual current detection module 5 detects residual current in a circuit protected by the circuit breaker through a current transformer, which is not described herein again; the main control module 6 can adopt a single chip microcomputer or a Central Processing Unit (CPU) to realize the functions of data acquisition, processing and transmission and the control of the circuit breaker; the alarm module 7 adopts an audible and visual alarm to perform audible and visual alarm, which is not described herein; the communication module 8 may implement wireless data interaction between the main control module 6 and the user terminal by using one of RS series communication, ZIGBEE (ZIGBEE) communication, GPRS (General packet radio service ) communication, Long Range (Long Range) communication, and NB-IoT (Narrow Band Internet of Things) communication.
Example 2: on the basis of embodiment 1, please refer to fig. 2 and fig. 3, in an embodiment of the residual current protection circuit breaker according to the present invention, the trip module 1 includes an AC/AC conversion unit 101 and a circuit breaker trip coil RL; the mechanical failure detection module 2 comprises a voltage detection unit 201, a signal processing unit 202 and a switch control unit 203;
specifically, an AC/AC conversion unit 101 for regulating a voltage input to a circuit breaker trip coil RL;
the circuit breaker trip coil RL is used for disconnecting a switch of a power supply and outputting a voltage signal;
a voltage detection unit 201, configured to detect a voltage signal output by the circuit breaker trip coil RL and output a pulse signal;
a signal processing unit 202, configured to receive the pulse signal output by the voltage detection unit 201, perform count processing on the pulse signal, and output a voltage signal;
a switch control unit 203 for controlling the voltage detection unit 201 and the signal processing unit 202 to perform voltage detection and pulse signal processing, respectively; the first end of the AC/AC conversion unit 101 is connected with a power supply, the second end of the AC/AC conversion unit 101 is connected with the first end of a tripping coil RL of the circuit breaker, the second end of the circuit breaker is connected with the first end of a voltage detection module, the second end of the voltage detection module is connected, the third end of the signal processing module is connected with the first end of the main control module 6, and the fourth end of the main control module 6 passes through the third end of the voltage detection unit 201 of the switch control unit 203.
Further, the AC/AC conversion unit 101 includes a first resistor R1, a second resistor R2, a first diode D1, a first capacitor C1, a first power supply +5V, a voltage regulator U2, a third resistor R3, and a second capacitor C2;
specifically, a first resistor R1 is connected to a live wire of a power supply, the other end of the first resistor R1 is connected to a first end of a circuit breaker trip coil RL, a second resistor R2 is connected to a zero wire of the power supply, the other end of the second resistor R2 is connected to a first end of a voltage regulator U2, a second end of the voltage regulator U2, a cathode of a first diode D1, and a first capacitor C1 are connected to +5V of the first power supply, a third end of the voltage regulator U2 is connected to a third end of the circuit breaker trip coil RL through a third resistor R3 and a second capacitor C2 in sequence, and a fourth end of the voltage regulator U2, an anode of the first diode D1, and the other end of the first capacitor C1 are grounded.
Further, the voltage detection unit 201 includes a fifth resistor R5, a fourth resistor R4, a third diode D3, a voltage detection chip U3, a sixth resistor R6 and a seventh resistor R7; the switch control unit 203 comprises a second diode D2 and a silicon controlled SCR;
specifically, the anode of the second diode D2 is connected to the second end of the circuit breaker trip coil RL, the cathode of the second diode D2 is connected to the anode of the silicon controlled rectifier SCR, the cathode of the silicon controlled rectifier SCR is connected to the cathodes of the fourth resistor R4 and the third diode D3 and is connected to the first end of the voltage detection chip U3 through the fifth resistor R5, the second end of the voltage detection chip U3 is connected to the first end of the seventh resistor R7 through the sixth resistor R6, the second end of the seventh resistor R7, the anode of the third diode D3, and the other end of the fourth resistor R4 are grounded, and the third end, the fourth end and the fifth end of the voltage detection chip U3 are also grounded.
Further, the signal processing unit 202 includes a counter U4, a control switch S1, a first logic chip J1, and a second logic chip J2;
specifically, a clock end of the counter U4 is connected to a first end of the seventh resistor R7, a data input end, a control end and a carry output end of the counter U4 are grounded, a counting control end, a power supply end and an addition and subtraction control end of the counter U4 are connected to +5V of a first power supply, a signal output end of the counter U4 is connected to an input end of the control switch S1, a first output end and a second output end of the control switch S1 are respectively connected to a first end and a second end of the first logic chip J1, and a third output end and a fourth output end of the control switch S1 are respectively connected to a first end and a second end of the second logic chip J2.
Further, the main control module 6 includes a first controller U1 and a twelfth resistor R12;
specifically, a first terminal of the first controller U1 is connected to the third terminal of the first logic chip J1, a second terminal of the first controller U1 is connected to the third terminal of the second logic chip J2, and the third terminal of the first controller U1 is connected to the control terminal of the SCR through a twelfth resistor R12.
In a specific embodiment, the first diode D1 and the third diode D3 are zener diodes, which ensure that the collected voltage cannot be too high, and avoid burning out the voltage regulator U2 and the voltage detector; the first controller U1 can adopt an STM32 series single chip microcomputer to receive and process the acquired signals, control the circuit breaker to work and alarm, and transmit data through wireless communication; the counter U4 can adopt a 16-system counter U4 of 74ALS169 to detect the generation times of residual current, and the counter U4 is matched with external components to form an addition counter; the control switch S1 can select a dial switch, and sets a threshold value of the number of the residual current detection times required by the dial; the first logic chip J1 and the second logic chip J2 can both receive the signal output by the control switch S1 in a logic and circuit control manner.
Example 3: based on embodiment 2, please refer to fig. 4 and 5, in an embodiment of the residual current protection circuit breaker according to the present invention, the trip fault detection module 3 includes a fourth diode D4, an eighth resistor R8, a fifth diode D5, a third capacitor C3, a ninth resistor R9, a first switch tube P1, a coupler U5, a tenth resistor R10, and an eleventh resistor R11;
specifically, the anode of the fourth diode D4 is connected to the second end of the circuit breaker trip coil RL, the cathode of the fourth diode D4 is connected to the cathode of the fifth diode D5, the third capacitor C3 and the ninth resistor R9 through the eighth resistor R8, the other end of the ninth resistor R9 is connected to the base of the first switching tube P1, the collector of the first switching tube P1, the other end of the third capacitor C3 and the anode of the fifth diode D5 are grounded, the emitter of the first switching tube P1 is connected to the second end of the coupler U5, the first end of the coupler U5 is connected to the first power supply +5V through the tenth resistor R10, the third end of the coupler U5 is connected to the first power supply +5V through the eleventh resistor R11, the third end of the coupler U5 is further connected to the fourth end of the first controller U1, and the fourth end of the coupler U5 is grounded.
Further, the test detection module 4 includes a sixth diode D6, a fourteenth resistor R14, a thirteenth resistor R13, a second switching tube M1, a seventh diode D7, a relay K, and a test residual current signal source V1;
specifically, cathodes of the fourteenth resistor R14 and the sixth diode D6 are connected to the fifth terminal of the first controller U1, an anode of the sixth diode D6 and the other end of the fourteenth resistor R14 are connected to the gates of the thirteenth resistor R13 and the second switch M1, the other end of the thirteenth resistor R13 and the source of the second switch M1 are grounded, a drain of the second switch M1 is connected to an anode of the seventh diode D7 and the relay K, the other end of the relay K and a cathode of the seventh diode D7 are connected to the first power supply +5V, and a contact of the relay K is connected in series between the test residual current signal source V1 and the fifth terminal of the first controller U1.
In a specific embodiment, the fifth diode D5 is a zener diode, and forms a simple regulated power supply with the fourth diode D4 to stabilize voltage, so as to prevent the first switching tube P1 from being burnt due to an excessively high base voltage of the first switching tube P1; the eighth resistor R8 is a limiting resistor for limiting the current passing through the trip coil RL of the circuit breaker; the first switch tube P1 can be a PNP transistor; the coupler U5 can be a 4N25 or 4N35 photocoupler U5 to realize signal transmission; the second switch tube M1 can select an N-channel enhancement type MOSFET, is driven by a first controller U1 to be switched on and controls a relay K to work, and the contact of the relay K is a normally open contact to control the input of a test residual current signal.
In the embodiment of the invention, the tripping condition of a circuit breaker in a tripping module 1 and the working condition of a tripping coil RL of the circuit breaker are respectively detected by a mechanical fault detection module 2 and a tripping fault detection module 3; the residual current in a circuit protected by the circuit breaker is detected and detected through the residual current detection module 5, the main control module 6 is responsible for receiving collected signals, analyzing and processing the signals through an internal software system, controlling the alarm module 7 to give an alarm, transmitting the detected signals to the user terminal through the communication module 8 for monitoring, and the user terminal can remotely send a test instruction to control the main control module 6 to control the test detection module 4 to output residual current signals and detect the circuit breaker regularly; in the mechanical fault detection module 2, when the circuit breaker is tripped normally, the module cannot work, when the circuit breaker is tripped abnormally, the voltage detection chip U3 inputs the detected voltages which are sequentially input to the clock end of the counter U4, the voltages are counted by the counter U4, the control switch S1 is used as a set threshold, and when the detected voltage times exceed the set threshold, an alarm is sent out and the user terminal is informed wirelessly; in the tripping fault detection module 3, the voltage value of the tripping coil RL of the circuit breaker is judged through the terminal voltage of the third capacitor C3, when the voltage of the third capacitor C3 is too high, the tripping coil RL of the circuit breaker is normal, and when the tripping coil RL of the circuit breaker is disconnected, the third capacitor C3 is reduced, so that the first switching tube P1 is conducted, and a signal is transmitted to the main control module 6 through the coupler U5 to alarm and communicate; the mechanical fault detection module 2 and the tripping fault detection module 3 are both used in the process of electric leakage; in the test detection module 4, the starting of the self-checking function of the circuit breaker is controlled through artificial input of residual current signals, and the circuit breaker is monitored at regular time.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A residual current protection circuit breaker, its characterized in that:
the residual current protection circuit breaker comprises a tripping module, a mechanical fault detection module, a tripping fault detection module, a test detection module, a residual current detection module, a main control module, an alarm module and a communication module;
the tripping module is used for adjusting the voltage input into a tripping coil of the circuit breaker, and is used for disconnecting a switch of a power supply and outputting a voltage signal;
the mechanical fault detection module is used for detecting the voltage signal output by the tripping module and outputting a pulse signal, and is used for counting the pulse signal and outputting the voltage signal;
the tripping fault detection module is used for detecting the working condition of a tripping coil of the circuit breaker and outputting a voltage signal;
the test detection module is used for sending a residual current signal under artificial control;
the residual current detection module is used for detecting the residual current in the circuit protected by the circuit breaker;
the main control module is used for receiving and processing voltage signals output by the mechanical fault detection module and the tripping fault detection module and residual current signals output by the test detection module and outputting control signals and data signals;
the alarm module is used for receiving the control signal output by the main control module and sending an alarm;
and the communication module is used for receiving the data signal output by the main control module and communicating with the user terminal.
2. The residual current protection circuit breaker according to claim 1, characterized in that said trip module comprises an AC/AC conversion unit and a circuit breaker trip coil; the mechanical fault detection module comprises a voltage detection unit, a signal processing unit and a switch control unit;
the AC/AC conversion unit is used for adjusting the voltage input into a tripping coil of the circuit breaker;
the circuit breaker trip coil is used for disconnecting a switch of a power supply and outputting a voltage signal;
the voltage detection unit is used for detecting a voltage signal output by the circuit breaker tripping coil and outputting a pulse signal;
the signal processing unit is used for receiving the pulse signals output by the voltage detection unit, counting the pulse signals and outputting voltage signals;
the switch control unit is used for controlling the voltage detection unit and the signal processing unit to respectively carry out voltage detection and pulse signal processing;
the first end of the AC/AC conversion unit is connected with a power supply, the second end of the AC/AC conversion unit is connected with the first end of a tripping coil of the circuit breaker, the second end of the circuit breaker is connected with the first end of the voltage detection module, the second end of the voltage detection module is connected, the third end of the signal processing module is connected with the first end of the main control module, and the fourth end of the main control module passes through the third end of the voltage detection unit of the switch control unit.
3. The residual current protection circuit breaker according to claim 2, characterized in that said AC/AC conversion unit comprises a first resistor, a second resistor, a first diode, a first capacitor, a first power supply, a voltage regulator, a third resistor and a second capacitor;
the live wire of power supply is connected to first resistance, the first end of circuit breaker trip coil is connected to the other end of first resistance, the zero line of power supply is connected to the second resistance, the first end of voltage regulator is connected to the other end of second resistance, the second end of voltage regulator, the first power is connected to the negative pole of first diode and first electric capacity, the third end of voltage regulator loops through the third resistance and the third end of second electric capacity connection circuit breaker trip coil, the fourth end of voltage regulator, the positive pole of first diode and the other end ground connection of first electric capacity.
4. The residual current protection circuit breaker according to claim 3, characterized in that, the voltage detection unit comprises a fifth resistor, a fourth resistor, a third diode, a voltage detection chip, a sixth resistor and a seventh resistor; the switch control unit comprises a second diode and a controllable silicon;
the positive pole of the second diode is connected with the second end of the tripping coil of the circuit breaker, the negative pole of the second diode is connected with the positive pole of the controlled silicon, the negative pole of the controlled silicon is connected with the negative poles of the fourth resistor and the third diode and is connected with the first end of the voltage detection chip through the fifth resistor, the second end of the voltage detection chip is connected with the first end of the seventh resistor through the sixth resistor, the second end of the seventh resistor, the positive pole of the third diode and the other end of the fourth resistor are grounded, and the third end, the fourth end and the fifth end of the voltage detection chip are grounded.
5. The residual current protection circuit breaker according to claim 4, characterized in that said signal processing unit comprises a counter, a control switch, a first logic chip and a second logic chip;
the clock end of the counter is connected with the first end of the seventh resistor, the data input end, the control end and the carry output end of the counter are grounded, the counting control end, the power end and the addition and subtraction control end of the counter are connected with the first power supply, the signal output end of the counter is connected with the input end of the control switch, the first output end and the second output end of the control switch are respectively connected with the first end and the second end of the first logic chip, and the third output end and the fourth output end of the control switch are respectively connected with the first end and the second end of the second logic chip.
6. The residual current protection circuit breaker according to claim 5, characterized in that said main control module comprises a first controller and a twelfth resistor;
the first end of the first controller is connected with the third end of the first logic chip, the second end of the first controller is connected with the third end of the second logic chip, and the third end of the first controller is connected with the control end of the controllable silicon through the twelfth resistor.
7. The residual current protection circuit breaker according to claim 6, wherein the tripping failure detection module comprises a fourth diode, an eighth resistor, a fifth diode, a third capacitor, a ninth resistor, a first switch tube, a coupler, a tenth resistor and an eleventh resistor;
the positive pole of the fourth diode is connected with the second end of the tripping coil of the circuit breaker, the negative pole of the fourth diode is connected with the negative pole of the fifth diode, the third capacitor and the ninth resistor through the eighth resistor, the other end of the ninth resistor is connected with the base of the first switch tube, the collector of the first switch tube, the other end of the third capacitor and the positive pole of the fifth diode are grounded, the emitter of the first switch tube is connected with the second end of the coupler, the first end of the coupler is connected with the first power source through the tenth resistor, the third end of the coupler is connected with the first power source through the eleventh resistor, the third end of the coupler is further connected with the fourth end of the first controller, and the fourth end of the coupler is grounded.
8. The residual current protection circuit breaker according to claim 6, wherein the test detection module comprises a sixth diode, a fourteenth resistor, a thirteenth resistor, a second switch tube, a seventh diode, a relay and a test residual current signal source;
the cathode of the fourteenth resistor and the cathode of the sixth diode are connected with the fifth end of the first controller, the anode of the sixth diode and the other end of the fourteenth resistor are connected with the thirteenth resistor and the grid electrode of the second switch tube, the other end of the thirteenth resistor and the source electrode of the second switch tube are grounded, the drain electrode of the second switch tube is connected with the anode of the seventh diode and the relay, the other end of the relay and the cathode of the seventh diode are connected with the first power supply, and the contact of the relay is connected between the test current signal source and the fifth end of the first controller in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110900234.1A CN113394744A (en) | 2021-08-06 | 2021-08-06 | Residual current protection circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110900234.1A CN113394744A (en) | 2021-08-06 | 2021-08-06 | Residual current protection circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN113394744A true CN113394744A (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110900234.1A Withdrawn CN113394744A (en) | 2021-08-06 | 2021-08-06 | Residual current protection circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992117A (en) * | 2021-11-01 | 2022-01-28 | 常州机电职业技术学院 | Motor control system for robot with temperature automatic compensation function |
-
2021
- 2021-08-06 CN CN202110900234.1A patent/CN113394744A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992117A (en) * | 2021-11-01 | 2022-01-28 | 常州机电职业技术学院 | Motor control system for robot with temperature automatic compensation function |
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Application publication date: 20210914 |
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