CN222506430U - Intelligent circuit breaker output power failure detection circuit and electronic equipment - Google Patents
Intelligent circuit breaker output power failure detection circuit and electronic equipment Download PDFInfo
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- CN222506430U CN222506430U CN202323503742.XU CN202323503742U CN222506430U CN 222506430 U CN222506430 U CN 222506430U CN 202323503742 U CN202323503742 U CN 202323503742U CN 222506430 U CN222506430 U CN 222506430U
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 238000001914 filtration Methods 0.000 claims abstract description 65
- 238000002955 isolation Methods 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 5
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Abstract
The utility model discloses an intelligent circuit breaker output power failure detection circuit and electronic equipment, wherein the circuit comprises a rectifying unit, a filtering and voltage reducing unit, an isolating unit and a detection signal generating unit, wherein the rectifying unit is used for being connected with an output side of a circuit breaker to rectify input voltage when any phase of the output side of the circuit breaker is electrified, the filtering and voltage reducing unit is connected with the rectifying unit and used for filtering and reducing the rectified input voltage, the isolating unit is connected with the filtering and voltage reducing unit, and the detection signal generating unit is connected with the isolating unit and used for being matched with the isolating unit to output a set level signal when any phase of the output side of the circuit breaker is electrified. The utility model has the advantages of simple circuit structure, low cost, high reliability and the like.
Description
Technical Field
The utility model relates to the technical field of intelligent circuit breakers, in particular to an intelligent circuit breaker output power failure detection circuit and electronic equipment.
Background
When the rear-stage circuit of the intelligent circuit breaker needs to be maintained, the circuit breaker needs to be controlled to break the gate first, at the moment, the output side of the circuit breaker is electroless under normal conditions, but when abnormal conditions such as ablation adhesion and the like occur on a contact of the circuit breaker, the contact can not be normally disconnected, so that the rear-stage circuit is electrified, the circuit breaker does not have the function of detecting whether the output side is electrified after breaking the gate, and therefore a special detection circuit is needed to detect whether the voltage condition exists on the output side of the circuit breaker after breaking the gate, and safety is ensured.
The existing detection circuit mainly comprises an isolated detection circuit. The isolation type detection circuit generally utilizes an isolation transformer and a linear optocoupler to sample analog signals by combining an ADC (analog to digital converter) sampling technology, and has the defects of higher implementation cost, more complex implementation technology and the like although voltage signals can be accurately acquired.
Disclosure of utility model
The utility model aims to solve the technical problem of providing an intelligent circuit breaker output power failure detection circuit and electronic equipment.
The technical scheme adopted by the utility model for solving the technical problems is that an intelligent circuit breaker output power failure detection circuit is constructed, and the intelligent circuit breaker output power failure detection circuit comprises:
A rectifying unit for connecting the output side of the circuit breaker to rectify an input voltage when any one phase of the output side of the circuit breaker is charged;
The filtering and voltage reducing unit is connected with the rectifying unit and used for filtering and reducing the rectified input voltage;
An isolation unit connected to the filtering and step-down unit, and
And the detection signal generation unit is connected with the isolation unit and is used for being matched with the isolation unit to output a set level signal when any phase on the output side of the circuit breaker is electrified.
Preferably, the rectifying unit comprises a plurality of sub-rectifying units, wherein the first ends of the sub-rectifying units are respectively connected with the output ends of the output sides of the circuit breaker in a one-to-one mode, the second ends of the sub-rectifying units are simultaneously connected with the first ends of the filtering and voltage reducing units, and the third ends of the sub-rectifying units are simultaneously connected with the second ends of the filtering and voltage reducing units.
Preferably, each of the sub rectification units includes a first diode D1 and a second diode D2;
The anode of the first diode D1 is connected with the cathode of the second diode D2 to serve as a first end of the sub-rectifying unit, the cathode of the first diode D1 serves as a second end of the sub-rectifying unit to be connected with the first end of the filtering and voltage reducing unit, and the anode of the second diode D2 serves as a third end of the sub-rectifying unit to be connected with the second end of the filtering and voltage reducing unit.
Preferably, the number of the sub rectifying units is 4.
Preferably, the filtering and step-down unit includes a first filtering unit for filtering the rectified input voltage and a step-down unit for step-down the rectified input voltage;
The first end of the first filtering unit is connected with the first end of the voltage reducing unit and then is used as the first end of the filtering and voltage reducing unit to be connected with the rectifying unit, the second end of the first filtering unit is used as the second end of the filtering and voltage reducing unit to be connected with the second input end of the rectifying unit and the isolating unit, and the second end of the voltage reducing unit is connected with the first input end of the isolating unit.
Preferably, the first filtering unit includes a first capacitor C1, and the step-down unit includes a first resistor R1.
Preferably, the isolation unit comprises an optical coupler U1, wherein the anode of the optical coupler U1 is used as a first input end of the isolation unit to be connected with a second end of the voltage reduction unit, the cathode of the optical coupler U1 is used as a second input end of the isolation unit to be connected with a second end of the first filtering unit, the collector of the optical coupler U1 is connected with the detection signal generation unit, and the emitter of the optical coupler U1 is grounded.
Preferably, the detection signal generating unit comprises a second resistor R2, wherein a first end of the second resistor R2 is connected with the first direct-current voltage, and a second end of the second resistor R2 is used as a signal output end with a set level and is connected with a collector electrode of the optical coupler U1.
Preferably, the intelligent breaker output power failure detection circuit further comprises a second filtering unit connected with the detection signal generation unit and used for filtering the set level signal;
The second filtering unit includes a second capacitor C2, and a second end of the second resistor R2 is connected to ground through the second capacitor C2.
The utility model also constructs an electronic device which comprises the intelligent breaker output power failure detection circuit.
The intelligent circuit breaker output power failure detection circuit has the advantages that when any phase of the circuit breaker output side is electrified, the input voltage is rectified through the rectifying unit, then the rectified input voltage is filtered and reduced through the filtering and voltage reducing unit, then the unit sum is generated by matching the isolating unit with the detection signal, so that the set level signal is output when any phase of the circuit breaker output side is electrified, and the intelligent circuit breaker output power failure detection circuit has the advantages of simple circuit structure, low cost, high reliability and the like.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic circuit diagram of an intelligent circuit breaker output outage detection circuit in some embodiments of the present utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1, a schematic circuit diagram of an intelligent circuit breaker output power failure detection circuit in some embodiments provided by the present utility model. The intelligent circuit breaker output power failure detection circuit can output a set level signal which can play a role in prompting when any phase line of the intelligent circuit breaker output side after the detection of the opening is electrified, so that a worker can be effectively prevented from checking under the condition that a rear-stage line of the intelligent circuit breaker is electrified. As shown in fig. 1, the circuit includes:
a rectifying unit 1 for connecting the output side of the circuit breaker to rectify an input voltage when any one of phases of the output side of the circuit breaker is charged;
a filtering and voltage reducing unit 2 connected with the rectifying unit 1 for filtering and reducing the rectified input voltage;
an isolation unit 3 connected to the filtering and step-down unit 2, and
And a detection signal generating unit 4 connected with the isolation unit 3 for cooperating with the isolation unit 3 to output a set level signal when any one of phases of the output side of the circuit breaker is electrified.
In this embodiment, when any phase of the output side of the circuit breaker is charged, the rectifying unit 1 rectifies the input voltage outputted by the charged phase line, then the filtering and step-down unit 2 filters the rectified input voltage to improve the stability of the rectified input voltage, the filtering and step-down unit 2 steps down the rectified input voltage to avoid the damage of the isolating unit 3 at the later stage due to overcurrent, and then the isolating unit 3 is matched with the detecting signal generating unit 4, so that a set level signal is outputted when any phase of the output side of the circuit breaker is charged, and the set level signal can be transmitted to an alarm circuit in the intelligent circuit breaker, so that the output side of the circuit breaker is informed of the charged state, thereby reducing the risk of electric shock.
In some embodiments, as shown in fig. 1, the rectifying unit 1 includes a plurality of sub-rectifying units 11, wherein a first end of each sub-rectifying unit 11 is respectively connected to each output end of the output side of the circuit breaker in a one-to-one manner, a second end of each sub-rectifying unit 11 is simultaneously connected to a first end of the filtering and voltage reducing unit 2, and a third end of each sub-rectifying unit 11 is simultaneously connected to a second end of the filtering and voltage reducing unit 2. Optionally, the number of the sub-rectifying units 11 is 4, and it can be understood that the number of the sub-rectifying units 11 is 4, so that the utility model can be applied to four-wire circuit breakers (such as three-phase four-wire circuit breakers, three-phase circuit breakers and two-phase circuit breakers) and below, specifically, for the three-phase four-wire circuit breakers, the first ends of the four sub-rectifying units 11 can be respectively connected with the three-phase line output ends and the neutral point output ends of the three-phase four-wire circuit breakers one by one, so that whether the output sides of the three-phase four-wire circuit breakers are electrified can be detected, and for the three-phase circuit breakers, detection work can be performed as long as the three-phase line output ends of the three-phase circuit breakers are connected with the three sub-rectifying units 11 one by one.
Further, as shown in fig. 1, each sub-rectification unit 11 may include a first diode D1 and a second diode D2, respectively. The anode of the first diode D1 and the cathode of the second diode D2 are connected and then serve as the first end of the sub-rectifying unit 11, the cathode of the first diode D1 serves as the second end of the sub-rectifying unit 11 and is connected with the first end of the filtering and voltage reducing unit 2, and the anode of the second diode D2 serves as the third end of the sub-rectifying unit 11 and is connected with the second end of the filtering and voltage reducing unit 2.
In some embodiments, as shown in fig. 1, the filtering and step-down unit 2 includes a first filtering unit 21 for filtering the rectified input voltage and a step-down unit 22 for step-down the rectified input voltage. The first end of the first filtering unit 21 is connected with the first end of the voltage reducing unit 22 and then is used as the first end of the filtering and voltage reducing unit 2 to be connected with the rectifying unit 1, the second end of the first filtering unit 21 is used as the second end of the filtering and voltage reducing unit 2 to be connected with the second input ends of the rectifying unit 1 and the isolating unit 3, and the second end of the voltage reducing unit 22 is connected with the first input end of the isolating unit 3.
Further, as shown in fig. 1, the first filtering unit 21 may include a first capacitor C1. In this embodiment, the first end and the second end of the first capacitor C1 are sequentially corresponding to the first end and the second end of the first filter unit 21. Alternatively, the first filtering unit 21 may be formed of a plurality of capacitors in series or parallel according to practical application requirements, so as to improve the filtering effect.
Further, as shown in fig. 1, the voltage decreasing unit 22 may include a first resistor R1. In this embodiment, the first end and the second end of the first resistor R1 correspond to the first end and the second end of the voltage reducing unit 22 in order. Alternatively, the voltage-reducing unit 22 may be formed by a plurality of resistors in series or parallel according to practical application requirements, so as to improve the voltage-withstanding performance of the voltage-reducing unit 22 and the threshold value of the passable current.
In some embodiments, as shown in fig. 1, the isolation unit 3 includes an optocoupler U1. The anode of the optical coupler U1 is used as a first input end of the isolation unit 3 to be connected with a second end of the voltage reduction unit 22, the cathode of the optical coupler U1 is used as a second input end of the isolation unit 3 to be connected with a second end of the first filter unit 21, the collector of the optical coupler U1 is connected with the detection signal generation unit 4, and the emitter of the optical coupler U1 is grounded. In this embodiment, the voltage reducing unit 22 can limit the current flowing through the anode and the cathode of the optocoupler U1, so as to effectively prevent the optocoupler U1 from being damaged due to overcurrent.
In some embodiments, as shown in fig. 1, the detection signal generation unit 4 includes a second resistor R2. The first end of the second resistor R2 is connected with the first direct-current voltage, and the second end of the second resistor R2 is used as a signal output end with a set level and is connected with the collector electrode of the optical coupler U1. In this embodiment, the first direct voltage may be provided by a power circuit comprised by the intelligent circuit breaker in connection with the power supply of its control circuit, so that the second resistor R2 acts as a pull-up.
Further, in some examples, as shown in fig. 1, the detection signal generating unit 4 further includes a second filtering unit 5 connected to the second end of the second resistor R2 for filtering the set level signal. The second filter unit 5 may include a second capacitor C2, and a second end of the second resistor R2 is connected to ground through the second capacitor C2. In this embodiment, the second filtering unit 5 filters the set level signal, so as to filter out abnormal jitter noise generated by the set level signal due to interference, thereby avoiding erroneous transmission of the set level signal to the error message.
Referring to fig. 1, the working principle of the intelligent circuit breaker output outage detection circuit is that assuming that the intelligent circuit breaker is a three-phase four-wire circuit breaker, after each sub-rectifying unit 11 is connected with 4 output ends of an output side of the intelligent circuit breaker in a one-to-one manner, if the output side is not electrified, the optocoupler U1 is turned off due to the fact that no power is supplied, under the pull-up action of the second resistor R2, the second end of the second resistor R2 is set to be at a high level, at this time, the low level signal can represent that the output side of the circuit breaker is not electrified, if any phase line exists in the output side, the relevant sub-rectifying unit 11 rectifies an input voltage, and after the voltage is reduced by the voltage reducing unit 22, the input voltage is input to the optocoupler U1, so that the optocoupler U1 is electrically conducted, the voltage of the second end of the second resistor R2 is pulled down to a low level, and a set level signal (namely the set level signal) can represent that the output side of the circuit breaker is electrified.
The utility model also provides electronic equipment, which comprises the intelligent circuit breaker output power failure detection circuit provided by the embodiment of the utility model.
It is understood that the foregoing examples merely illustrate preferred embodiments of the present utility model, and the description thereof is specific and detailed and not to be construed as limiting the utility model, and that it is understood that various changes and modifications can be made by one skilled in the art without departing from the spirit of the utility model, and that it is intended to cover all modifications and adaptations of the utility model as fall within the scope of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323503742.XU CN222506430U (en) | 2023-12-21 | 2023-12-21 | Intelligent circuit breaker output power failure detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323503742.XU CN222506430U (en) | 2023-12-21 | 2023-12-21 | Intelligent circuit breaker output power failure detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222506430U true CN222506430U (en) | 2025-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323503742.XU Active CN222506430U (en) | 2023-12-21 | 2023-12-21 | Intelligent circuit breaker output power failure detection circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN222506430U (en) |
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2023
- 2023-12-21 CN CN202323503742.XU patent/CN222506430U/en active Active
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