CN215219063U - Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker - Google Patents
Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker Download PDFInfo
- Publication number
- CN215219063U CN215219063U CN202120144755.4U CN202120144755U CN215219063U CN 215219063 U CN215219063 U CN 215219063U CN 202120144755 U CN202120144755 U CN 202120144755U CN 215219063 U CN215219063 U CN 215219063U
- Authority
- CN
- China
- Prior art keywords
- module
- digital isolation
- circuit breaker
- voltage stabilizing
- rear end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model relates to a circuit breaker divide-shut brake monitoring circuit and circuit breaker based on digital isolation, include: the device comprises a rectification module, a voltage stabilizing module, a digital isolation module and an MCU control module; the rectification module is connected with a live wire at the rear end of the circuit breaker; the zero line at the rear end of the circuit breaker is connected with the common ground; the voltage stabilizing module is respectively connected with the rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to an input pin at the front end of the digital isolation module; the output pin at the rear end of the digital isolation module is connected with the MCU control module, and the MCU control module monitors the switching-on and switching-off state of the circuit breaker and/or the charged state of the live wire according to a level signal output by the output pin at the rear end of the digital isolation module. The utility model discloses can avoid mechanical switch wearing and tearing, electromagnetic interference and opto-coupler to keep apart the defect that needs the multi-component, effectively, reliably and realize the circuit breaker and close the monitoring of separating brake state and live wire electrified state steadily.
Description
Technical Field
The utility model relates to a circuit breaker technical field, especially a circuit breaker divide-shut brake monitoring circuit and circuit breaker based on digital isolation.
Background
The circuit breaker, especially intelligent circuit breaker, is used more and more extensively as the protection device of consumer front end, and its intelligent degree and security problem also are more and more receiving people's attention. However, the existing intelligent circuit breakers in the market generally have some technical defects, which are mainly reflected in that the opening and closing state monitoring of the intelligent circuit breaker is generally realized by adopting modes such as a microswitch or a hall sensor. Because the micro-gap switch is a mechanical switch, the micro-gap switch is worn or stuck due to frequent use, and the state of the circuit breaker cannot be accurately monitored. Although the hall sensor mode is adopted, the defect of a mechanical switch can be overcome, the hall sensor is an electromagnetic element, so that the hall sensor is easily influenced by a surrounding magnetic field to generate misoperation, and in addition, the hall sensor is required, and a magnetic element for generating the magnetic field is also required to be added, so that the element cost and the deployment cost are increased. Adopt the opto-coupler isolation mode, need monitor three routes phase line state to three-phase four-wire system circuit breaker, consequently need use three opto-coupler device at least, the cost is higher, is unfavorable for batch production.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a circuit breaker divide-shut brake monitoring circuit and circuit breaker based on digital isolation, can avoid mechanical switch wearing and tearing, electromagnetic interference and opto-coupler to keep apart the defect that needs the multi-element, effectively, reliably and realize the monitoring of circuit breaker on-off state steadily.
The utility model adopts the following technical scheme:
on the one hand, a circuit breaker divide-shut brake monitoring circuit based on digital isolation includes: the device comprises a rectification module, a voltage stabilizing module, a digital isolation module and an MCU control module; the rectification module is connected with a live wire at the rear end of the circuit breaker; the zero line at the rear end of the circuit breaker is connected with the common ground; the voltage stabilizing module is respectively connected with the rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to an input pin at the front end of the digital isolation module; the output pin at the rear end of the digital isolation module is connected with the MCU control module, and the MCU control module monitors the switching-on and switching-off state of the circuit breaker and/or the charged state of the live wire according to a level signal output by the output pin at the rear end of the digital isolation module.
Preferably, the firing line comprises one; the rectifying module comprises one; the voltage stabilizing module comprises one; and the output end of the voltage stabilizing module is connected with a power pin at the front end of the digital isolation module.
Preferably, the circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: a voltage dividing resistor; and a live wire at the rear end of the circuit breaker is connected with the voltage stabilizing module through a rectifying module and a divider resistor which are connected in series.
Preferably, the digital isolation module comprises a single-channel digital isolation chip or a multi-channel digital isolation chip.
Preferably, the live wire comprises three; the number of the rectifying modules is three; the voltage stabilizing modules comprise three modules; the front end of the digital isolation module comprises three input pins, the rear end of the digital isolation module comprises three output pins, and each output pin corresponds to one input pin; each rectification module is connected with a live wire at the rear end of one circuit breaker respectively; each voltage stabilizing module is respectively connected with one rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to one input pin at the front end of the digital isolation module; each output pin at the rear end of the digital isolation module is connected with one I/O port of the MCU control module, and the MCU control module monitors the opening and closing state of the circuit breaker and/or the charged state of each live wire according to level signals output by each output pin at the rear end of the digital isolation module.
Preferably, the circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: three divider resistors and three unidirectional diodes; one end of each divider resistor is connected with the output end of one rectifier module, the other end of each divider resistor is connected with the anode of one-way diode, and the cathodes of the three one-way diodes are connected with a power pin at the front end of the digital isolation module.
Preferably, the digital isolation module comprises a three-channel digital isolation chip or a digital isolation chip larger than three channels.
Preferably, the rectifying module comprises a rectifying diode; the anode of the rectifier diode is connected with a live wire at the rear end of the circuit breaker; and the cathode of the rectifier diode is connected with the voltage stabilizing module.
Preferably, the voltage stabilizing module comprises a voltage stabilizing diode; the cathode of the voltage stabilizing diode is respectively connected with the power pins at the front ends of the rectifying module and the digital isolation module; the anode of the voltage stabilizing diode is connected with the common ground.
Preferably, the circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: the front-end filtering module is used for filtering the power supply input to the power pin at the front end of the digital isolation module; the front-end filtering module comprises a capacitor, or two or more capacitors connected in parallel.
In another aspect, the circuit breaker comprises the circuit breaker opening and closing monitoring circuit based on digital isolation.
Compared with the prior art, the beneficial effects of the utility model are as follows:
(1) the utility model discloses can monitor the divide-shut brake state of single-phase or three-phase four-wire system circuit breaker and the electrified state of phase line; when the opening and closing state of the single-phase circuit breaker and the electrified state of the phase line are monitored, a single-channel digital isolation chip (or a multi-channel digital isolation chip) and a peripheral circuit are used; when the opening and closing state of the three-phase four-wire system circuit breaker and the electrified state of the phase line are monitored, a three-channel digital isolation chip (or a digital isolation chip larger than three channels) and a peripheral circuit are used; the utility model has the advantages of effective, stable and reliable monitoring circuit and low cost, and can effectively isolate high and low voltage rooms and protect the rear-end equipment;
(2) the digital isolation chip of the utility model can play an isolation role, so that when the breaker is opened, the front and rear circuit can be completely disconnected to protect the rear equipment;
(3) use the circuit breaker monitoring time of three-phase four-wire system, the utility model discloses an it simultaneously gets the power foot of giving digital isolation chip front end to follow the three-phase respectively to three one-way diode, consequently, if certain looks in the three-phase does not have the electric time (when lacking the looks promptly), can not influence the normal work of digital isolation chip.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention can be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following description lists the embodiments of the present invention.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a circuit diagram of a first embodiment of the present invention;
fig. 2 is a circuit diagram of a second embodiment of the present invention.
Detailed Description
In order to make the technical solution and advantages of the present invention more clearly understood, the following description is given with reference to the accompanying drawings and embodiments,
the present invention will be described in further detail. It should be understood that the embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.
For simplicity and clarity of description, the aspects of the present invention are described below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It is clear, however, that the solution according to the invention can be implemented without being limited to these details. Some embodiments are not described in detail, but rather only to give a framework, in order to avoid unnecessarily obscuring aspects of the present invention. Hereinafter, "including" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.
Example one
Referring to fig. 1, on the one hand, the utility model relates to a circuit breaker divide-shut brake monitoring circuit based on digital isolation, include: the device comprises a rectification module, a voltage stabilizing module, a digital isolation module and an MCU control module; the rectification module is connected with a live wire L at the rear end of the circuit breaker; a zero line N at the rear end of the circuit breaker is connected with a common ground; the voltage stabilizing module is respectively connected with the rectifying module and the digital isolation module so as to stabilize the rectified power and input the stabilized power to an input pin VIN (2) at the front end of the digital isolation module; and an output pin VOUT (6) at the rear end of the digital isolation module is connected with the MCU control module, and the MCU control module monitors the switching-on and switching-off state of the circuit breaker and/or the charged state of the live wire L according to a level signal output by the output pin at the rear end of the digital isolation module.
In this embodiment, the number of the live lines L includes one; the rectifying module comprises one; the voltage stabilizing module comprises one; the output end of the voltage stabilizing module is connected with a power pin VDD1(1) at the front end of the digital isolation module.
In this embodiment, the circuit breaker divide-shut brake monitoring circuit based on digital isolation be applied to single-phase circuit breaker.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: a voltage dividing resistor R1; and a live wire L at the rear end of the circuit breaker is connected with the voltage stabilizing module through a rectifying module and a voltage dividing resistor R1 which are connected in series.
In this embodiment, the digital isolation module includes a single channel digital isolation chip U1, such as a pi 110xxx series digital isolation chip U1, for default low level output of three sets of surge. In other embodiments, there may be more than one channel of multi-channel digital isolation chip U1, such as the pi 130xxx series digital isolation chip U1, output by default at low level in three channels of forward voltage, but using only one of the input pins and output pin, the use of multi-channel digital isolation chip U1 may result in waste of resources.
Specifically, the rectifying module comprises a rectifying diode D1; the anode of the rectifier diode D1 is connected with a live wire L at the rear end of the circuit breaker; the cathode of the rectifying diode D1 is connected with the voltage stabilizing module.
The voltage stabilizing module comprises a voltage stabilizing diode D4; the cathode of the voltage stabilizing diode D4 is respectively connected with a power pin VDD1(1) at the front ends of the rectifying module and the digital isolation module; the anode of the zener diode D4 is connected to the common ground.
The voltage dividing resistor R1 is arranged between the rectifier diode D1 and the voltage stabilizing diode D4, one end of the voltage dividing resistor R1 is connected with the negative electrode of the voltage stabilizing diode D4, and the other end of the voltage dividing resistor R1 is connected with the negative electrode of the voltage stabilizing diode D4.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: a front-end filtering module for filtering the power input to the power pin VDD1(1) at the front end of the digital isolation module; the front-end filtering module comprises a capacitor, or two or more capacitors connected in parallel.
In this embodiment, the front-end filter module includes a first capacitor C1 and a second capacitor C2, and the first capacitor C1 and the second capacitor C2 are connected in parallel.
A power pin VDD2(8) at the rear end of the digital isolation module is connected with a direct current power supply VCC; the direct current power supply VCC is also connected with the MCU control module to supply power.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: a rear-end filtering module for filtering the direct-current power supply VCC; the end filtering module comprises a capacitor, or two or more capacitors connected in parallel; one end of the rear-end filtering module is connected with the direct-current power supply VCC, and the other end of the rear-end filtering module is connected with a grounding pin at the rear end of the digital isolation module.
In this embodiment, the back-end filtering module includes a third capacitor C3.
The monitoring method of the embodiment is as follows:
in this embodiment, the live line L at the rear end of the circuit breaker first goes through the unidirectional rectification of the rectifying diode D1 and the voltage division of the voltage dividing resistor R1, and then reaches the 5V zener diode D4, so as to generate a high-level power signal +5V, and the +5V power is connected to the input pin VIN (2) at the front end of the digital isolation chip U1 on the one hand, and is connected to the power pin VDD1(1) at the front end of the digital isolation chip U1 on the other hand. When the circuit breaker closed a floodgate and live wire L end had the electricity, MCU control module's I/O input detected output pin VOUT (6) output high level signal of digital isolation chip U1 rear end, represent circuit breaker closed a floodgate and live wire L has the electricity, when circuit breaker separating brake or closed a floodgate but live wire L does not have the electricity, output pin VOUT (6) the default output of digital isolation chip U1 rear end is the low level, MCU control module's I/O input detects for low, represent circuit breaker separating brake or live wire L do not have the electricity.
In another aspect, the circuit breaker comprises the circuit breaker opening and closing monitoring circuit based on digital isolation.
Example two
On the one hand, a circuit breaker divide-shut brake monitoring circuit based on digital isolation includes: the device comprises a rectification module, a voltage stabilizing module, a digital isolation module and an MCU control module; the rectification module is connected with a live wire at the rear end of the circuit breaker; the zero line at the rear end of the circuit breaker is connected with the common ground; the voltage stabilizing module is respectively connected with the rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to an input pin at the front end of the digital isolation module; the output pin at the rear end of the digital isolation module is connected with the MCU control module, and the MCU control module monitors the switching-on and switching-off state of the circuit breaker and/or the charged state of the live wire according to a level signal output by the output pin at the rear end of the digital isolation module.
In this embodiment, the number of live wires includes three; the number of the rectifying modules is three; the voltage stabilizing modules comprise three modules; the front end of the digital isolation module comprises three input pins, the rear end of the digital isolation module comprises three output pins, and each output pin corresponds to one input pin; each rectification module is connected with a live wire at the rear end of one circuit breaker respectively; each voltage stabilizing module is respectively connected with one rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to one input pin at the front end of the digital isolation module; each output pin at the rear end of the digital isolation module is connected with one I/O port of the MCU control module, and the MCU control module monitors the opening and closing state of the circuit breaker and/or the charged state of each live wire according to level signals output by each output pin at the rear end of the digital isolation module.
In this embodiment, the circuit breaker opening and closing monitoring circuit based on digital isolation is applied to a three-phase four-wire system circuit breaker. The three phases comprise an A phase, a B phase and a C phase, namely three live wires are respectively an A phase line, a B phase line and a C phase line.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: three voltage dividing resistors (R1, R2 and R3) and three one-way diodes (D7, D8 and D9); one end of each divider resistor is connected with the output end of one rectifier module, the other end of each divider resistor is connected with the anode of one-way diode, and the cathodes of the three one-way diodes are connected with a power pin at the front end of the digital isolation module.
In this embodiment, the digital isolation module includes a three-channel digital isolation chip U1, such as a pi 130xxx series digital isolation chip for default low level output of three channels of voltage. In other embodiments, a digital isolation chip larger than three channels can be included, but only three of the input pins and the output pins are used, and the use of the multi-channel digital isolation chip can cause waste of resources.
In particular, the rectifier module comprises rectifier diodes (D1, D2, D3); the anode of the rectifier diode is connected with a live wire (A, B, C) at the rear end of the circuit breaker; and the cathode of the rectifier diode is connected with the voltage stabilizing module.
Specifically, the voltage stabilizing module comprises a voltage stabilizing diode (D4, D5, D6); the cathode of the voltage stabilizing diode is respectively connected with the power pins at the front ends of the rectifying module and the digital isolation module; the anode of the voltage stabilizing diode is connected with the common ground.
Each voltage dividing resistor is arranged between each rectifier diode and each voltage stabilizing diode, one end of each voltage dividing resistor is connected with the negative electrode of each voltage stabilizing diode, and the other end of each voltage dividing resistor is connected with the negative electrode of each voltage stabilizing diode.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: the front-end filtering module is used for filtering the power supply input to the power pin at the front end of the digital isolation module; the front-end filtering module comprises a capacitor, or two or more capacitors connected in parallel.
In this embodiment, the front-end filtering module includes a first capacitor C1 and a second capacitor C2, and the first capacitor and the second capacitor are connected in parallel.
The power pin at the rear end of the digital isolation module is connected with a direct current power supply; the direct current power supply is also connected with the MCU control module to supply power.
Circuit breaker divide-shut brake monitoring circuit based on digital isolation still include: the rear-end filtering module is used for filtering the direct-current power supply; the end filtering module comprises a capacitor, or two or more capacitors connected in parallel; one end of the rear-end filtering module is connected with the direct-current power supply, and the other end of the rear-end filtering module is connected with a grounding pin at the rear end of the digital isolation module.
In this embodiment, the back-end filtering module includes a third capacitor C3.
The monitoring method for each phase in this embodiment is as follows:
phase line A firstly passes through the unidirectional rectification of a rectifying diode D1 and voltage division of a voltage division resistor R1 and then reaches a 5V voltage stabilizing diode D4 to generate a square wave signal +5V with a period of high level and a period of low level, wherein the +5V is connected to an input pin VIA (3) at the front end of a digital isolation chip U1 on one hand and is connected to a unidirectional diode D7 on the other hand to generate a +5V power supply to supply power to a power pin VDD1(1) at the front end of a digital isolation chip U1. When the circuit breaker is switched on and the A phase is electrified, the I/O input end of the MCU control module detects that an output pin VOA (14) at the rear end of the digital isolation chip U1 outputs a high-level square wave signal to represent switching-on and electrification of the A phase, when the circuit breaker is switched off or switched on but the A phase is electroless, the output pin VOA (14) at the rear end of the digital isolation chip U1 defaults to output a low level, and the I/O input end of the MCU control module detects a low level to represent switching-off or electroless of the circuit breaker.
Phase line B firstly passes through the unidirectional rectification of the rectifier diode D2 and the voltage division of the voltage division resistor R2 and then reaches the 5V voltage stabilizing diode D5, generates a square wave signal +5V with a period of high level and a period of low level, and the +5V square wave signal is connected to the input pin VIB (4) at the front end of the digital isolation chip U1 on one hand and is connected to the unidirectional diode D8 on the other hand, and generates a +5V power supply to supply power to the power pin VDD1(1) at the front end of the digital isolation chip U1. When the circuit breaker is switched on and the B phase is electrified, the I/O input end of the MCU control module detects that an output pin VOA (13) at the rear end of the digital isolation chip U1 outputs a high-level square wave signal to represent that the B phase is switched on and electrified, when the circuit breaker is switched off or switched on but the B phase is not electrified, the output pin VOB (13) at the rear end of the digital isolation chip U1 defaults to output a low level, and the I/O input end of the MCU control module detects a low level to represent that the circuit breaker is switched off or the B phase is electrified.
The phase line C firstly passes through the unidirectional rectification of the rectifier diode D3 and the voltage division of the voltage division resistor R3 and then reaches the 5V voltage stabilizing diode D6, generates a square wave signal with a period of high level and a period of low level, wherein the +5V signal is connected to the input pin VIC (5) at the front end of the digital isolation chip U1 on one hand, and is connected to the unidirectional diode D9 on the other hand, and generates a +5V power supply to supply power to the power pin VDD1(1) at the front end of the digital isolation chip U1. When the circuit breaker is switched on and the C phase is electrified, the I/O input end of the MCU control module detects that an output pin VOA (12) at the rear end of the digital isolation chip U1 outputs a square wave signal with the high level of VCC, which represents that the C phase is switched on and electrified, when the circuit breaker is switched off or switched on and the C phase is not electrified, the output pin VOC (12) at the rear end of the digital isolation chip U1 defaults to output low level, and the I/O input end of the MCU control module detects low level, which represents that the circuit breaker is switched off or the C phase is electrified.
In this embodiment, the front-end voltage-dividing resistors R1, R2, and R3 are to select the adaptive model (power) according to the voltage reduction amplitude, the capacitors C1 and C2 are used for filtering the front-end power supply +5V of the digital isolation chip U1, the capacitor C3 is used for filtering the rear-end power supply VCC of the digital isolation chip U1, and the rear-end power supply VCC is to be the same system power supply as the power supply of the MCU control module.
In addition, if one of the phases (phase a, phase B, and phase C) is not in the absence of power (i.e., phase loss), the normal operation of the digital isolation chip is not affected, because the present embodiment takes power from three phases at the same time instead of one phase. Namely, each phase in the above-mentioned system makes the power pin VDD1(1) at the front end of the digital isolation chip U1 powered by the +5V power generated by the corresponding diode (D7, D8, D9).
In another aspect, the circuit breaker comprises the circuit breaker opening and closing monitoring circuit based on digital isolation.
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (11)
1. The utility model provides a circuit breaker divide-shut brake monitoring circuit based on digital isolation which characterized in that includes: the device comprises a rectification module, a voltage stabilizing module, a digital isolation module and an MCU control module; the rectification module is connected with a live wire at the rear end of the circuit breaker; the zero line at the rear end of the circuit breaker is connected with the common ground; the voltage stabilizing module is respectively connected with the rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to an input pin at the front end of the digital isolation module; the output pin at the rear end of the digital isolation module is connected with the MCU control module, and the MCU control module monitors the switching-on and switching-off state of the circuit breaker and/or the charged state of the live wire according to a level signal output by the output pin at the rear end of the digital isolation module.
2. The digital isolation based circuit breaker opening and closing monitoring circuit according to claim 1, wherein the live line comprises one; the rectifying module comprises one; the voltage stabilizing module comprises one; and the output end of the voltage stabilizing module is connected with a power pin at the front end of the digital isolation module.
3. The circuit breaker divide-shut brake monitoring circuit based on digital isolation of claim 2, further comprising: a voltage dividing resistor; and a live wire at the rear end of the circuit breaker is connected with the voltage stabilizing module through a rectifying module and a divider resistor which are connected in series.
4. The circuit breaker opening and closing monitoring circuit based on digital isolation according to claim 2, wherein the digital isolation module comprises a single-channel digital isolation chip or a multi-channel digital isolation chip.
5. The digital isolation based circuit breaker opening and closing monitoring circuit according to claim 1, wherein the live line comprises three; the number of the rectifying modules is three; the voltage stabilizing modules comprise three modules; the front end of the digital isolation module comprises three input pins, the rear end of the digital isolation module comprises three output pins, and each output pin corresponds to one input pin; each rectification module is connected with a live wire at the rear end of one circuit breaker respectively; each voltage stabilizing module is respectively connected with one rectifying module and the digital isolation module so as to stabilize the rectified power supply and input the stabilized power supply to one input pin at the front end of the digital isolation module; each output pin at the rear end of the digital isolation module is connected with one I/O port of the MCU control module, and the MCU control module monitors the opening and closing state of the circuit breaker and/or the charged state of each live wire according to level signals output by each output pin at the rear end of the digital isolation module.
6. The circuit breaker divide-shut brake monitoring circuit based on digital isolation of claim 5, further comprising: three divider resistors and three unidirectional diodes; one end of each divider resistor is connected with the output end of one rectifier module, the other end of each divider resistor is connected with the anode of one-way diode, and the cathodes of the three one-way diodes are connected with a power pin at the front end of the digital isolation module.
7. The circuit breaker opening and closing monitoring circuit based on digital isolation according to claim 5, wherein the digital isolation module comprises a three-channel digital isolation chip or a digital isolation chip larger than three channels.
8. The digital isolation based circuit breaker opening and closing monitoring circuit according to claim 1, wherein the rectifying module comprises a rectifying diode; the anode of the rectifier diode is connected with a live wire at the rear end of the circuit breaker; and the cathode of the rectifier diode is connected with the voltage stabilizing module.
9. The circuit breaker opening and closing monitoring circuit based on digital isolation according to claim 1, wherein the voltage stabilizing module comprises a voltage stabilizing diode; the cathode of the voltage stabilizing diode is respectively connected with the power pins at the front ends of the rectifying module and the digital isolation module; the anode of the voltage stabilizing diode is connected with the common ground.
10. The circuit breaker divide-shut brake monitoring circuit based on digital isolation of claim 1, further comprising: the front-end filtering module is used for filtering the power supply input to the power pin at the front end of the digital isolation module; the front-end filtering module comprises a capacitor, or two or more capacitors connected in parallel.
11. A circuit breaker comprising a circuit breaker opening and closing monitoring circuit based on digital isolation according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120144755.4U CN215219063U (en) | 2021-01-19 | 2021-01-19 | Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120144755.4U CN215219063U (en) | 2021-01-19 | 2021-01-19 | Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215219063U true CN215219063U (en) | 2021-12-17 |
Family
ID=79437828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120144755.4U Active CN215219063U (en) | 2021-01-19 | 2021-01-19 | Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215219063U (en) |
-
2021
- 2021-01-19 CN CN202120144755.4U patent/CN215219063U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170338740A1 (en) | Igbt/fet-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation | |
| CN116094143B (en) | Power voltage detecting system | |
| CN108206517A (en) | A kind of low cost inputs anti-overvoltage crowbar | |
| US9300220B2 (en) | Uninterruptible power supply system | |
| CN102148529B (en) | Control device and control method thereof for intelligently supplying power to circuit breaker control unit | |
| CN201994717U (en) | Control device for supplying power to breaker control units | |
| CN105391320B (en) | Polyphase source circuit | |
| CN215219063U (en) | Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker | |
| CN111884324A (en) | Power supply switching system | |
| CN208352968U (en) | A kind of PFC overvoltage crowbar and device | |
| CN113009326A (en) | Circuit breaker switching-on and switching-off monitoring circuit based on digital isolation and circuit breaker | |
| CN205453078U (en) | Current foldback circuit and constant voltage power supply | |
| US9654022B2 (en) | Power conversion device and control method thereof | |
| CN210380651U (en) | Power supply protection circuit and alternating current-direct current power supply conversion circuit | |
| CN210629083U (en) | Electric leakage protection device and electric equipment | |
| CN111786354B (en) | Thyristor short-circuit protection circuit and device | |
| CN221010003U (en) | AC/DC power supply circuit and AC/DC power supply equipment | |
| CN211741424U (en) | Cascaded converter unit input phase loss detection circuit | |
| CN114079281A (en) | Low-voltage direct current system and power supply system | |
| CN210985644U (en) | Motor overvoltage protection circuit and motor | |
| CN110460031B (en) | Alternating current access protection circuit of direct current power supply interface | |
| CN112821745B (en) | Power supply conversion system applied to commercial vehicle | |
| CN213960368U (en) | Control circuit and lighting apparatus | |
| CN211046465U (en) | Motor overvoltage protection circuit and motor | |
| CN211958854U (en) | Power supply switching circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |