CN215870721U - Residual current circuit breaker - Google Patents
Residual current circuit breaker Download PDFInfo
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- CN215870721U CN215870721U CN202022938440.5U CN202022938440U CN215870721U CN 215870721 U CN215870721 U CN 215870721U CN 202022938440 U CN202022938440 U CN 202022938440U CN 215870721 U CN215870721 U CN 215870721U
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Abstract
A high-power supply unit and a quick start power supply unit are respectively connected with a power supply management unit, and the power supply management unit is respectively connected with a processor system unit, a residual current signal conditioning unit and a quick release unit for supplying power; the high-power supply unit is directly connected with the motor opening and closing unit for supplying power, or the high-power supply unit is connected with the motor opening and closing unit for supplying power through the power management unit; the residual current signal conditioning unit is connected with the processor system unit, and the processor system unit is respectively connected with the motor opening and closing unit and the quick tripping unit; the quick start power supply unit can be quickly started to supply power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit; the high-power supply unit is slower in starting speed than the quick-starting power supply unit and used for supplying power to the motor switching-on and switching-off unit, so that the requirement of a system on power is met, and the requirement of the system on residual current response time is met.
Description
Technical Field
The utility model belongs to the field of low-voltage electric appliances, and particularly relates to a residual current circuit breaker.
Background
In recent years, micro circuit breakers with functions of communication, remote control, reclosing and the like are continuously released, and meanwhile, partial products have a residual current protection function. The circuit breaker with the residual current protection function has strict requirements on the action time of protection due to the fact that personal safety is involved, and the products in the current market all adopt a residual current protection special chip (such as 54123) in the aspect of residual current protection, mainly in order to meet the requirements of national standards on protection time, and the residual current protection threshold value is fixed and cannot be adjusted after the products are installed, so that the requirements of partial customers on the residual current protection threshold value which can be set at any time cannot be met. Meanwhile, the product has a reclosing function which needs to be realized by a low-voltage direct-current motor, and due to the requirement of the power of the motor, a power supply part of the circuit breaker is realized by adopting a switching power supply scheme with a high-frequency transformer, and the establishment time of the power supply is generally more than tens of ms, so that the time requirement of protection when residual current exists during electrifying can not be met.
Based on the above problems, the existing products in the current market adopt the system architecture shown in fig. 1, adopt a high-power supply to supply power to the processor system unit, and judge whether to execute operations such as opening and closing through a reclosing motor by a processor of the processor system unit; in addition, a quick start power supply unit is provided, the quick start power supply unit only supplies power for the residual current protection unit, the residual current protection unit comprises a residual current detection circuit and a residual current special chip, and the residual current protection unit judges whether to execute tripping operation according to the situation of residual current. According to the scheme, the high-power supply and the quick-start power supply unit are mutually independent and respectively supply power for different units, the residual current protection threshold value cannot be adjusted, and the requirement that part of customers can set the residual current protection threshold value at any time cannot be met.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the residual current circuit breaker which has a simple structure, meets the requirements of a system on power and the response time of the system on residual current.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a residual current circuit breaker comprises a high-power supply unit, a quick start power supply unit, a processor system unit, a residual current signal conditioning unit, a quick release unit, a motor switching-on and switching-off unit and a power supply management unit, wherein the high-power supply unit and the quick start power supply unit are respectively connected with the power supply management unit which is respectively connected with the processor system unit, the residual current signal conditioning unit and the quick release unit for supplying power; the high-power supply unit is directly connected with the motor opening and closing unit for supplying power, or the high-power supply unit is connected with the motor opening and closing unit for supplying power through the power management unit;
the residual current signal conditioning unit is connected with the processor system unit, detects residual current and transmits conditioned residual current signals to the processor system unit, the processor system unit is respectively connected with the motor switching-on and switching-off unit and the quick tripping unit, the processor system unit judges whether residual current exists according to the residual current signals, and drives the circuit breaker to trip and open the brake through the quick tripping unit when the residual current exists;
the quick start power supply unit can be quickly started to supply power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit; the high-power supply unit is slower in starting speed than the quick-starting power supply unit, the output power of the high-power supply unit is larger than that of the quick-starting power supply unit, and the high-power supply unit is used for supplying power to the motor switching-on and switching-off unit and supplying power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit.
Preferably, the power management unit stops the power supply of the quick start power supply unit after the high-power supply unit is started, the high-power supply unit supplies power to the motor switching-on and switching-off unit, the processor system unit, the residual current signal conditioning unit and the quick release unit, or the quick start power supply unit continues to be kept supplying power, and the high-power supply unit only supplies power to the motor switching-on and switching-off unit.
Preferably, the start-up time of the quick start power supply unit is less than 10 ms.
Preferably, the processor system unit comprises a processor, and the processor is a microcontroller MCU or a single chip microcomputer.
Preferably, the high-power supply unit includes a transformer T1 and a switch chip U1, an input terminal of the high-power supply unit is connected to the transformer T1 through a switch chip U1, the switch chip U1 is connected to a primary side of the transformer T1, on/off of a primary side of the transformer T1 is controlled by the switch chip U1, and a secondary side of the transformer T1 outputs a transformed voltage.
Preferably, the positive input terminal L _ DC1 and the negative input terminal N1 of the high-power supply unit are connected to the primary side of the transformer T1 through the filter circuit and the switch chip control circuit; the filter circuit comprises an inductor L1, capacitors C4 and C5, two ends of the inductor L1 are respectively connected with anodes of the capacitors C4 and C5, one end of the inductor L1, which is connected with the capacitor C4, is connected with an anode input end L _ DC1, and cathodes of C4 and C5 are connected to a cathode input end N1;
the switch chip control circuit comprises a diode D3, a capacitor C2, a diode D5 and a switch chip U1, wherein the diode D3 and the capacitor C2 are connected in parallel and then connected in series with a diode D5, one end, connected in parallel, of a cathode of the diode D3 and the capacitor C2 is connected with a cathode of a diode D5, one end, connected in parallel, of an anode of the diode D3 and a capacitor C2 is connected with an inductor L1 and connected with one end of a primary side of a transformer T1, and an anode of the diode D5 is connected with the other end of the primary side of the transformer T1;
the positive voltage input end of the switch chip U1 is connected to the anode of a diode D5, the negative voltage output end is connected to a cathode input end N1, one end of the secondary side of the transformer T1 is connected with the cathode of the diode D2, the other end of the secondary side of the transformer T1 is connected with a cathode input end N1, a capacitor C1 is connected with a resistor R1 in series and then connected with the diode D2 in parallel, the anode of a diode D4 is connected with the cathode of the diode D2, the cathode of the diode D4 is connected with the resistor R2, the other end of the R2 is connected to a power supply end VDD of the switch chip U1, and meanwhile, the other end of the R2 is connected to the cathode input end N1 through a capacitor C6; one end of a resistor R3 is connected to the cathode of the diode D2, the other end of the resistor R3 is connected to the feedback end FB of the switch chip U1, the resistor R4 and the capacitor C7 are connected in parallel and then connected to the cathode input end N1, the connection position of a resistor R3 and the cathode of the diode D2 is controlled to be the output voltage VCC1, the anode of the capacitor C3 is connected to the output voltage VCC1, and the cathode of the capacitor C3 is connected to the cathode input end N1.
Preferably, the fast start power supply unit includes a switch chip U2, a D terminal of the switch chip U2 is connected to an anode input terminal L _ DC02 of the fast start power supply unit, one terminal of a capacitor C8 is connected to a BP terminal of the switch chip U2, the other terminal is connected to an S terminal of the switch chip U2, one terminal of a resistor R5 is connected to an S terminal of the switch chip U2, the other terminal is connected to an FB terminal of the switch chip U2 and is connected to one terminal of a resistor R6, the other terminal of the resistor R6 is connected to the resistor R5 through a capacitor C10, an inductor L3 is connected to an anode of a diode D8, an anode of the diode D8 is connected to a node of the capacitor C10 and the resistor R6, the other terminal of the inductor L3 is connected to an S terminal of the switch chip U2, and two terminals of the capacitors C9 and C11 are connected in parallel to a power supply output terminal VCC2 and a cathode input terminal AGND of the fast start power supply unit.
Preferably, the device further comprises a communication module, the processor system unit is connected with the communication module, the processor system unit can perform data interaction with the upper computer through the communication module, and receives a control signal of the upper computer to adjust the residual current protection threshold value.
Preferably, the circuit breaker further comprises a touch screen and/or a key unit, the processor system unit is connected with the touch screen and/or the key unit, and the residual current protection threshold value of the circuit breaker can be adjusted through the touch screen and/or the key unit.
Preferably, the power management unit comprises a diode D1 and a diode D6, the cathodes of D1 and D6 are connected to form an or gate circuit, and the anodes of D1 and D6 are connected to the output terminals of the high-power supply unit and the quick-start power supply unit, respectively.
The residual current circuit breaker uses the two power supply units, namely the high-power supply unit and the quick start power supply unit, so that the requirement of a system on power is met, the requirement of the system on the response time of residual current is also met, a residual current special chip is not needed, and a residual current protection threshold value is set through the processor system unit, so that the requirement of national standards on protection time is met, and the requirement of a user for adjusting the residual current protection threshold value is also met.
Drawings
Fig. 1 is a functional architecture diagram of a conventional residual current circuit breaker;
fig. 2 is a functional architecture diagram of a residual current circuit breaker according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of one embodiment of a high power supply unit of the present invention;
FIG. 4 is a circuit diagram of one embodiment of a fast start power supply unit of the present invention;
fig. 5 is a circuit diagram of one embodiment of a power management unit of the present invention.
Detailed Description
The following description will further describe a specific embodiment of the residual current circuit breaker according to the present invention with reference to the embodiments shown in fig. 2 to 4. The residual current circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in fig. 2, the residual current circuit breaker of the present embodiment includes a high-power supply unit, a fast start power supply unit, a power supply management unit, a processor system unit, a residual current signal conditioning unit, a fast trip unit, and a motor switching unit;
the high-power supply unit and the quick start power supply unit are respectively connected with a power supply management unit, and the power supply management unit is respectively connected with the processor system unit, the residual current signal conditioning unit and the quick release unit for supplying power; the high-power supply unit is directly connected with the motor opening and closing unit for supplying power, or the high-power supply unit is connected with the motor opening and closing unit for supplying power through the power management unit;
the residual current signal conditioning unit is connected with the processor system unit, detects residual current and transmits conditioned residual current signals to the processor system unit, the processor system unit is respectively connected with the motor switching-on and switching-off unit and the quick tripping unit, the processor system unit judges whether residual current exists according to the residual current signals, and drives the circuit breaker to trip and open the brake through the quick tripping unit when the residual current exists;
the quick start power supply unit can be quickly started to supply power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit; the high-power supply unit is slower in starting speed than the quick-starting power supply unit, the output power of the high-power supply unit is larger than that of the quick-starting power supply unit, and the high-power supply unit is used for supplying power to the motor switching-on and switching-off unit and supplying power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit.
The residual current circuit breaker of this embodiment adopts the mode of two kinds of power supplies, in order to satisfy the power consumption requirement of motor divide-shut brake unit, provides conventional high-power electrical unit, still increases the quick start power supply unit of the same kind in addition for satisfy the quick power supply of treater system unit, residual current signal conditioning unit and quick dropout unit. The power-on time of the quick-start power supply unit is several ms, and the time of the processor start, the residual current signal conditioning unit, the quick-release unit, the execution and the like of the processor system unit can meet the requirement of a product on the protection action time when the power supply is switched on and the residual current occurs simultaneously, and meanwhile, the detection and the protection of the residual current are completely realized by the processor system unit, so that the function of setting the residual current action threshold value at any time can be realized.
The high-power supply unit is used for meeting the requirement of the whole system on power supply power and providing enough energy for the whole system, and comprises a processor system unit, a residual current signal conditioning unit, a motor switching-on and switching-off unit and a quick tripping unit which are connected for power supply. The high-power supply unit usually includes a high-frequency transformer, which can provide enough power for the opening and closing operation of the motor.
The quick starting power supply unit is characterized by being capable of being quickly started to ensure that the processor can be quickly started, the starting time is less than 10ms, a power supply of the processor can be established within a few ms of the connection of a main loop, the residual current is timely detected, whether a breaking protection function needs to be executed or not is judged, and the quick starting power supply unit is used for supplying power to the connection of the processor system unit, the residual current signal conditioning unit and the quick tripping unit without supplying power to the motor switching-on and switching-off unit or supplying large power, and the power of the quick starting power supply unit is not enough to drive the switching-on operation of the motor. Preferably, the fast start power supply unit may adopt schemes such as BUCK voltage reduction, resistance-capacitance voltage reduction and the like.
The power management unit is used for energy distribution and use of the high-power supply unit and the quick-start power supply unit, and the power management unit stops power supply of the quick-start power supply unit or continues to maintain power supply of the quick-start power supply unit after the high-power supply unit is started, for example, after the high-power supply unit is started, whether the quick-start power supply unit is kept to continue power supply or only the high-power supply needs to continue operation can be determined. The high-power supply unit and the quick start power supply unit supply power to the processor system unit, the quick release unit and the residual current signal conditioning unit through the power management unit, and the high-power supply unit can directly supply power to the motor opening and closing unit or supply power to the motor opening and closing unit through the power management unit. The power management unit can be connected to the control end of the electronic switch element after being processed, the power supply management unit cuts off the power supply of the quick start power supply unit and conducts a power supply line started by the high power supply unit. In another embodiment, after the high-power supply unit is started, the quick-start power supply unit continuously supplies power to the processor system unit, the quick-release unit and the residual current signal conditioning unit, and the high-power supply unit supplies power to the motor opening and closing unit.
As shown in fig. 5, in an embodiment of the power management unit, the power management unit includes a diode D1 and a diode D6, the cathodes of D1 and D6 are connected to form an or gate, and the anodes of D1 and D6 are connected to the output terminals of the high-power supply unit and the fast-start power supply unit, respectively. The output voltage VIN of the power management unit is determined by the higher voltage of the output voltage VCC1 of the high-power supply unit and the output voltage VCC2 of the fast-start power supply unit, if VCC1 > VCC2, VIN is equal to VCC1 minus the forward voltage drop of the diode D1; if VCC2 > VCC1, then VIN is equal to VCC2 minus the forward voltage drop of diode D6.
The processor system unit comprises a processor which is a microcontroller MCU or a singlechip and is the core of the whole system, the power supply management unit supplies power, detects and processes signals (such as temperature, residual current, main loop voltage, current and the like) and receives communication signals, determines the opening and closing operations of products, outputs signals to drive the motor opening and closing unit and the quick tripping unit, and can perform data transmission with the outside and the like.
The quick tripping unit is used for driving the circuit breaker operating mechanism to execute quick opening operation, such as an electromagnetic tripping device.
The motor switching-on and switching-off unit is used for driving a circuit breaker operating mechanism, can perform switching-off and switching-on operations, and generally comprises a motor, a driving gear in transmission fit with the motor, and a switching-on driving part and a switching-off driving part in fit with the driving gear, wherein the switching-on driving part is coupled with a handle of the circuit breaker, and the switching-off driving part is matched with a lock catch of the circuit breaker.
And the residual current signal conditioning unit receives and processes residual current and transmits the conditioned residual signal to the processor system unit. The residual current signal conditioning unit is usually connected with the zero sequence transformer, receives the residual current induced by the zero sequence transformer, performs conditioning such as amplification and filtering, and transmits the conditioned residual current to the processor system unit, the processor system unit judges whether residual current exists according to the residual current signal, when the residual current exists, the quick tripping unit drives the circuit breaker to trip and open the brake, whether residual current exists and tripping protection are completely realized by the processor system unit, and the function of setting the residual current action threshold value at any time can be realized.
Preferably, the residual current circuit breaker further comprises a communication module, the processor system unit is connected with the communication module, the processor system unit can perform data interaction with the upper computer through the communication module, and receives a control signal of the upper computer to adjust the residual current protection threshold value.
Preferably, the residual current circuit breaker further comprises a touch screen and/or a key unit, the processor system unit is connected with the touch screen and/or the key unit, and the residual current protection threshold value of the circuit breaker can be adjusted through the touch screen and/or the key unit.
As shown in fig. 3, a preferred embodiment of the high power supply unit includes a transformer T1, a primary side of the transformer T1 is connected to a pulsating direct current after rectification of an alternating current, and a secondary side of the transformer T1 is connected to a voltage after voltage transformation, so as to meet the requirement of the whole system on power supply power. Preferably, the high power supply unit further includes a switch chip U1, the switch chip U1 is connected to the primary side of the transformer T1, the switch chip U1 controls the on/off of the primary side of the transformer T1, the secondary side of the transformer T1 outputs the transformed voltage, and outputs a feedback signal connected to the feedback terminal FB of the switch chip U1.
Specifically, as shown in fig. 3, L _ DC1 and N1(AGND) are pulsating DC input terminals after rectification of the ac power, where L _ DC1 is a positive input terminal and N1(AGND) is a negative input terminal. The positive input end L _ DC1 and the negative input end N1 of the high-power supply unit are connected with the primary side of a transformer T1 through a filter circuit and a switch chip control circuit; the filter circuit comprises an inductor L1, capacitors C4 and C5, two ends of the inductor L1 are respectively connected with anodes of the capacitors C4 and C5, one end of the inductor L1 connected with the capacitor C4 is connected with an anode input end L _ DC1, cathodes of the inductor C4 and the inductor C5 are connected to a cathode input end N1(AGND) to form the filter circuit, and therefore the filter circuit aims at smoothing pulsating direct current. The switch chip control circuit comprises a diode D3, a capacitor C2, a diode D5 and a switch chip U1, wherein the diode D3 and the capacitor C2 are connected in parallel and then connected in series with a diode D5, and then the whole is connected in parallel with the primary side of a transformer T1 and used for the follow current function of the primary side of the transformer T1, one end of a diode D3, which is connected in parallel with the capacitor C2, is connected with the cathode of a diode D5, one end of the anode of the diode D3, which is connected in parallel with the capacitor C2, is connected with an inductor L1 and is connected with one end of the primary side of the transformer T1, the anode of a diode D5 is connected with the other end of the primary side of the transformer T1, a positive voltage input end of the switch chip U1 is connected to the anode of a diode D5, a negative voltage output end is connected to a negative voltage input end N1(AGND), and the switch chip U1 controls the on and off of the primary side of the transformer T1. One end of a secondary side of the transformer T1 is connected with a cathode of the diode D2, the other end of the secondary side of the transformer T1 is connected with a cathode input end N1(AGND), the capacitor C1 is connected with the resistor R1 in series and then connected with the diode D2 in parallel to form a unidirectional conduction circuit, an anode of the diode D4 is connected with a cathode of the diode D2, a cathode of the diode D4 is connected with the resistor R2, and the other end of the R2 is connected with a power supply end VDD of the switch chip U1 and is connected to a cathode input end N1(AGND) through the capacitor C6. One end of the resistor R3 is connected to the cathode of the diode D2, the other end of the resistor R3 is connected to the feedback end FB of the switch chip U1, the resistor R4 and the capacitor C7 are connected in parallel and then connected with the cathode input end N1, and the output voltage VCC1 of the high-power supply unit is controlled at the connection position of the resistor R3 and the cathode of the diode D2 through the matching of the resistor R3 and the resistor R4. The capacitor C3 has a positive terminal connected to the output voltage VCC1 and a negative terminal connected to the negative input terminal N1(AGND) for smoothing the fluctuation of the negative input terminal VCC 1. The output voltage VCC1 of the high-power supply unit is connected with the diode D1 of the power management unit, the anode of the diode D1 is connected to the output voltage VCC1, the cathode is the output voltage VIN of the power management unit, and the output voltage VI supplies power for subsequent systems. Preferably, the switch chip U1 model of this implementation is PN 6360.
Referring to fig. 4, a preferred embodiment of the fast start power supply unit is shown in which L _ DC02 and AGND are rectified and filtered pulsating DC inputs, where L _ DC02 is a positive input and AGND is a negative input. Preferably, the positive input terminal L _ DC02 is connected to the filter circuit of fig. 3, and shares a power supply and filter circuit with the high power supply unit, and L _ DC02 is connected to the junction of the inductor L1 and the capacitor C5. Of course, the positive input terminal L _ DC02 may be provided with a filter circuit separately. The quick-start power supply unit comprises a switch chip U2, and a D end of the switch chip U2 is connected with a positive input end L _ DC02 of the quick-start power supply unit and serves as an input end of the quick-start power supply unit. One end of the capacitor C8 is connected to the BP terminal of the switch chip U2, and the other end is connected to the S terminal of the switch chip U2 for bypassing. One end of the resistor R5 is connected to the S end of the switch chip U2, the other end thereof is connected to the FB end of the switch chip U2, and is connected with one end of the resistor R6, and the other end of the resistor R6 is connected to the resistor R5 through the capacitor C10. The inductor L3 is connected with the anode of the diode D8, the anode of the diode D8 is connected to the node of the capacitor C10 and the resistor R6, and the other end of the inductor L3 is connected to the S end of the switch chip U2. After the capacitors C9 and C11 are connected in parallel, two ends of the capacitors are respectively connected to a power output end VCC2 and a negative input end AGND of the quick start power supply unit for energy storage and filtering, and a power output end VCC2 is used as an output end of the quick start power supply unit and is used for supplying power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit. The output voltage VCC1 of the high-power supply unit is connected with the diode D6 of the power management unit, the anode of the diode D6 is connected to the output voltage VCC2, the cathode is the output voltage VIN of the power management unit, and the output voltage VI supplies power for subsequent systems. Preferably, the switch chip U1 of this implementation is model number LNK 306.
The embodiment uses two power supply units, namely a high-power supply unit and a quick start power supply unit, so that the requirement of the system on power is met, the requirement of the system on the response time of residual current is met, a chip special for the residual current is not needed to be used, and the residual current protection threshold value can be set through a processor system unit. The present embodiment provides the circuits of the preferred embodiments of the high-power supply unit and the quick-start power supply unit, and of course, other circuits meeting the power requirement and the quick-start requirement may be adopted to implement the circuits according to the needs, and all belong to the protection scope of the present invention.
The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.
Claims (10)
1. The utility model provides a residual current circuit breaker, includes high-power electrical unit, quick start electrical unit, treater system unit, residual current signal conditioning unit, quick dropout unit and motor divide-shut brake unit, its characterized in that:
the high-power supply unit and the quick start power supply unit are respectively connected with the power supply management unit, and the power supply management unit is respectively connected with the processor system unit, the residual current signal conditioning unit and the quick release unit for supplying power; the high-power supply unit is directly connected with the motor opening and closing unit for supplying power, or the high-power supply unit is connected with the motor opening and closing unit for supplying power through the power management unit;
the residual current signal conditioning unit is connected with the processor system unit, detects residual current and transmits conditioned residual current signals to the processor system unit, the processor system unit is respectively connected with the motor switching-on and switching-off unit and the quick tripping unit, the processor system unit judges whether residual current exists according to the residual current signals, and drives the circuit breaker to trip and open the brake through the quick tripping unit when the residual current exists;
the quick start power supply unit can be quickly started to supply power to the processor system unit, the residual current signal conditioning unit and the quick tripping unit; the high-power supply unit is slower in starting speed than the quick-starting power supply unit, and the output power of the high-power supply unit is larger than that of the quick-starting power supply unit.
2. The residual current circuit breaker according to claim 1, characterized in that: the power management unit stops the power supply of the quick starting power supply unit after the high-power supply unit is started, the high-power supply unit supplies power to the motor switching-on and switching-off unit, the processor system unit, the residual current signal conditioning unit and the quick tripping unit, or the quick starting power supply unit continues to be kept supplying power, and the high-power supply unit only supplies power to the motor switching-on and switching-off unit.
3. The residual current circuit breaker according to claim 1, characterized in that: the start-up time of the quick start power supply unit is less than 10 ms.
4. The residual current circuit breaker according to claim 1, characterized in that: the processor system unit comprises a processor which is a microcontroller MCU or a singlechip.
5. The residual current circuit breaker according to claim 1, characterized in that: the high-power supply unit comprises a transformer T1 and a switch chip U1, the input end of the high-power supply unit is connected with a transformer T1 through a switch chip U1, the switch chip U1 is connected to the primary side of a transformer T1, the on-off of the primary side of the transformer T1 is controlled through a switch chip U1, and the secondary side of the transformer T1 outputs transformed voltage.
6. The residual current circuit breaker according to claim 5, characterized in that: the positive input end L _ DC1 and the negative input end N1 of the high-power supply unit are connected with the primary side of a transformer T1 through a filter circuit and a switch chip control circuit; the filter circuit comprises an inductor L1, capacitors C4 and C5, two ends of the inductor L1 are respectively connected with anodes of the capacitors C4 and C5, one end of the inductor L1, which is connected with the capacitor C4, is connected with an anode input end L _ DC1, and cathodes of C4 and C5 are connected to a cathode input end N1;
the switch chip control circuit comprises a diode D3, a capacitor C2, a diode D5 and a switch chip U1, wherein the diode D3 and the capacitor C2 are connected in parallel and then connected in series with a diode D5, one end, connected in parallel, of a cathode of the diode D3 and the capacitor C2 is connected with a cathode of a diode D5, one end, connected in parallel, of an anode of the diode D3 and a capacitor C2 is connected with an inductor L1 and connected with one end of a primary side of a transformer T1, and an anode of the diode D5 is connected with the other end of the primary side of the transformer T1;
the positive voltage input end of the switch chip U1 is connected to the anode of a diode D5, the negative voltage output end is connected to a cathode input end N1, one end of the secondary side of the transformer T1 is connected with the cathode of the diode D2, the other end of the secondary side of the transformer T1 is connected with a cathode input end N1, a capacitor C1 is connected with a resistor R1 in series and then connected with the diode D2 in parallel, the anode of a diode D4 is connected with the cathode of the diode D2, the cathode of the diode D4 is connected with the resistor R2, the other end of the R2 is connected to a power supply end VDD of the switch chip U1, and meanwhile, the other end of the R2 is connected to the cathode input end N1 through a capacitor C6; one end of a resistor R3 is connected to the cathode of the diode D2, the other end of the resistor R3 is connected to the feedback end FB of the switch chip U1, the resistor R4 and the capacitor C7 are connected in parallel and then connected to the cathode input end N1, the connection position of a resistor R3 and the cathode of the diode D2 is controlled to be the output voltage VCC1, the anode of the capacitor C3 is connected to the output voltage VCC1, and the cathode of the capacitor C3 is connected to the cathode input end N1.
7. The residual current circuit breaker according to claim 1, characterized in that: the quick-start power supply unit comprises a switch chip U2, a D end of a switch chip U2 is connected with an anode input end L _ DC02 of the quick-start power supply unit, one end of a capacitor C8 is connected with a BP end of the switch chip U2, the other end of the capacitor C8 is connected with an S end of a switch chip U2, one end of a resistor R5 is connected with an S end of the switch chip U2, the other end of the resistor R2 is connected with an FB end of the switch chip U2 and is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the resistor R5 through a capacitor C10, an inductor L3 is connected with an anode of a diode D8, an anode of the diode D8 is connected with a node of the capacitor C10 and the resistor R6, the other end of the inductor L3 is connected with the S end of the switch chip U2, and two ends of the capacitors C9 and C11 are respectively connected with a power supply output end VCC2 and a cathode input end AGND of the quick-start power supply unit after being connected in parallel.
8. The residual current circuit breaker according to claim 1, characterized in that: the device comprises a processor system unit, a communication module, a control signal receiving module, a residual current protection threshold value adjusting module and a control signal receiving module, wherein the processor system unit is connected with the communication module and can perform data interaction with an upper computer through the communication module, and the control signal receiving module receives the control signal from the upper computer and adjusts the residual current protection threshold value.
9. The residual current circuit breaker according to claim 1, characterized in that: the processor system unit is connected with the touch screen and/or the key unit, and the residual current protection threshold value of the circuit breaker can be adjusted through the touch screen and/or the key unit.
10. The residual current circuit breaker according to claim 1, characterized in that: the power management unit comprises a diode D1 and a diode D6, the cathodes of D1 and D6 are connected to form an OR gate circuit, and the anodes of D1 and D6 are respectively connected with the output ends of the high-power supply unit and the quick-start power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022938440.5U CN215870721U (en) | 2020-12-10 | 2020-12-10 | Residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022938440.5U CN215870721U (en) | 2020-12-10 | 2020-12-10 | Residual current circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN215870721U true CN215870721U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022938440.5U Active CN215870721U (en) | 2020-12-10 | 2020-12-10 | Residual current circuit breaker |
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| Country | Link |
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| CN (1) | CN215870721U (en) |
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