CN211123155U - Automatic closing circuit breaker detection device with residual current protection function - Google Patents
Automatic closing circuit breaker detection device with residual current protection function Download PDFInfo
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- CN211123155U CN211123155U CN201921247812.0U CN201921247812U CN211123155U CN 211123155 U CN211123155 U CN 211123155U CN 201921247812 U CN201921247812 U CN 201921247812U CN 211123155 U CN211123155 U CN 211123155U
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Abstract
The utility model discloses a take residual current protect function's automatic combined floodgate circuit breaker detection device, a serial communication port, select unit, tested article state detecting element including control and information processing unit, human-computer interaction unit, test current output unit, test circuit. The utility model has the advantages that: the utility model discloses a take residual current protect function's long-range combined floodgate circuit break testing arrangement for detect and the characteristic of record circuit breaker, including manual combined floodgate mode test, automatic combined floodgate circuit breaker functional test, automatic combined floodgate circuit breaker shutting functional test.
Description
Technical Field
The utility model relates to a detection apparatus for be used for detecting automatic combined floodgate circuit breaker who takes residual current protect function.
Background
For the earth leakage circuit breaker, there are many causes of malfunction, such as surge voltage caused by lightning in the circuit, higher harmonic caused by electronic equipment in the circuit, capacitance current of long conductor to ground, etc., and such malfunction of the circuit breaker brings high management and operation cost to daily fault detection evaluation and maintenance in some application fields (such as communication base station, tunnel system, photovoltaic field, building system, etc.), so that remote closing circuit breaker products are generally concerned.
Disclosure of Invention
The utility model aims at providing a detection device for detecting automatic combined floodgate circuit breaker who takes residual current protect function.
In order to achieve the above object, the technical scheme of the utility model a take residual current protect function's automatic combined floodgate circuit breaker detection device is provided, a serial communication port, including control and information processing unit, human-computer interaction unit, test current output unit, test circuit selection unit, tested article state detecting element, wherein:
the human-computer interaction unit is connected with the control and information processing unit; the control and information processing unit is connected with the test current output unit through an analog signal port, the control and information processing unit is connected with the test loop selection unit and the on/off-shaped test article state detection unit for detecting the test article through a digital signal port, and the test current output by the test current output unit is output to any one of A, B, C three phases in the automatic switch-on circuit breaker through the test loop;
the test current output unit comprises a filter circuit, an isolation circuit, a voltage-current conversion circuit and a current sampling feedback circuit, wherein: the input end of the filter circuit is connected with the analog voltage signal output port of the control and information processing unit, the output end of the filter circuit is connected with the input end of the voltage-current conversion circuit through the isolation circuit, the output end of the voltage-current conversion circuit is connected with the test loop selection unit, meanwhile, the output end of the voltage-current conversion circuit is connected with the current sampling feedback circuit in parallel, and the current sampling feedback circuit is connected with the control and information processing unit.
Preferably, the filter circuit comprises an operational amplifier U1A, a resistor R0, a resistor R1, a resistor R2 and a capacitor C0, wherein the non-inverting input terminal of the operational amplifier U1A is connected to the analog voltage signal output port of the control and information processing unit through a resistor R0, and meanwhile, the non-inverting input terminal of the operational amplifier U1A is grounded through a capacitor C0; the inverting input terminal of the operational amplifier U1A is connected to ground via a resistor R1; a resistor R2 is connected between the inverting input end and the output end of the operational amplifier U1A; the output end of the operational amplifier U1A is connected with the isolation circuit.
Preferably, the isolation circuit comprises an isolation operational amplifier U2, a resistor R3 and a zero setting network, wherein the non-inverting input end of the isolation operational amplifier U2 is connected with the output end of the operational amplifier U1A through the resistor R3; the reverse input end of the isolation operational amplifier U2 is in short circuit with the output end; the COM terminal, the VC terminal and the VS terminal of the isolation operational amplifier U2 are grounded through a zero setting network.
Preferably, the test circuit selection unit is composed of a multi-way selection switch, a control end of the multi-way selection switch is controlled by a control and information processing unit through a digital signal, an upper end of an A, B, C three-phase port in the automatic switch-on circuit breaker with the residual current protection function is connected with an output positive electrode of the test current output unit through one group of switches in the multi-way selection switch, a lower end of a A, B, C three-phase port in the automatic switch-on circuit breaker with the residual current protection function is connected with an output negative electrode of the test current output unit through the other group of switches in the multi-way selection switch, the control and information processing unit is closed through one switch in the group of switches and the corresponding switch in the other group of switches, so that the corresponding one phase of the A, B, C three phases in the automatic switch-on circuit breaker with the residual current protection function is conducted, or the control and information processing unit is turned off through one switch in the group of switches and and opening, so that a corresponding one of A, B, C three phases in the automatic closing circuit breaker with the residual current protection function is cut off.
The utility model has the advantages that: the utility model discloses a take residual current protect function's long-range combined floodgate circuit break testing arrangement for detect and the characteristic of record circuit breaker, including manual combined floodgate mode test, automatic combined floodgate circuit breaker functional test, automatic combined floodgate circuit breaker shutting functional test.
Drawings
Fig. 1 is a schematic structural diagram of an automatic closing circuit breaker testing device with a residual current protection function according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a test current output unit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a test loop selection unit according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating a connection mode between a test port of a test object and a test object state detection unit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of the state detection of the tested object according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
As shown in fig. 1, the testing apparatus of the remote closing circuit breaker with residual current protection according to the present disclosure includes a control and information processing unit 101, a human-computer interface 102, a test current output unit 103, a test loop selection unit 104, a test object state detection unit 105, and a test object testing port 106.
The human-machine interface 102 is connected to the control and information processing unit 101 through a half-duplex communication interface 107, and performs transmission and display of user setting data and real-time test data. The control and information processing unit 101 is connected with the test current output unit 103 through the analog signal port 108, and adjusts the magnitude of the test current by changing the amplitude of the analog voltage signal 110. The control and information processing unit 101 is connected to the test loop selection unit 104 through a digital signal port 109, and is configured to perform a test on any one pole of a test object. The control and information processing unit 101 is connected to the test object state detection unit 105 through the digital signal port 109, and receives the test object state signal 113 to determine the on/off state of the test object. The test current output unit 103 is directly connected with the test loop selection unit 104 through a wire. The test loop selection unit 104 is directly connected with the test port 106 of the tested object through a lead. The test port 106 of the tested object is directly connected with the test state detection unit 105 through a lead.
Taking the function test of the remote switch-on circuit breaker with residual current protection as an example, the specific working mode of the testing device is as follows: first, the human-machine interface 102 receives test data set by a user, displays the test data on the human-machine interface 102, and transmits the test data to the control and information processing unit 101 through the half-duplex communication interface 107, and the control and information processing unit 101 stores the test data in an internal memory. Then, when the user presses the start key, the control and information processing unit 101 first determines whether the tested object is in a closed state according to the tested object state signal 113 provided by the tested object state detection unit 105, and if the tested object is in an open state, displays and outputs a user closing text to prompt the user to close the tested object. When the tested object is in a closed state, the control and information processing unit 101 outputs an analog voltage signal 110 through the analog signal port 108 according to a set test current value to be transmitted to the test current output unit 103, and the test current output unit 103 generates a current under the control of the analog voltage signal 110, converts the current value into a voltage signal, and then forms a feedback signal 111 to be transmitted to the control and information processing unit 101. If the error of the output current value and the test current value set by the user exceeds 3%, the control and information processing unit 101 performs fine adjustment on the analog voltage signal 110 so that the error of the output current value and the test current value set by the user is within 3%. Then, the control and information processing unit 101 sends a digital signal 112 to the test loop selection unit 104 through the digital signal port 109 according to the test phase selection set by the user, and selects a test current loop, once the test loop is gated, the test current generated by the test current output unit 103 is loaded to the test port 106 of the tested object through the test loop selection unit 104, and the tested object in the closed state should trip and open under the action of the test current. Then, the control and information processing unit 101 determines whether the tested object is opened or not according to the tested object state signal 113 provided by the tested object state detection unit 105, and if the tested object is not opened for more than 500ms, the test is stopped, and the tested object is determined to be unqualified. If the tested object is opened and the opening time meets the standard requirement, the control and information processing unit 101 stops outputting the analog voltage signal 110, the test current output unit 103 stops outputting the current, the control and information processing unit 101 starts timing, and whether the tested object is remotely closed according to the tested object state signal 113 provided by the tested object state detection unit 105 is judged. If the tested article is not remotely closed after the time of the tested article exceeds 60s, the tested article is judged to be unqualified, if the tested article is remotely closed within 20s, the tested article is judged to be unqualified, and if the tested article is remotely closed within the time range of 20 s-60 s, the tested article is judged to be qualified, and the test is finished.
As shown in fig. 2, the test current output unit 103 disclosed in this embodiment includes a filter circuit 301, an isolation circuit 302, a voltage-to-current conversion circuit 303, and a current sampling feedback circuit 304. The filter circuit 301 performs low-pass filtering on the analog voltage signal sent by the control and information processing unit 101 to eliminate high-frequency interference coupled in the signal transmission process, and is composed of an operational amplifier U1A, a resistor R0/R1/R2 and a capacitor C0, wherein the cutoff frequency is set to 1kHz by the parameter combination of the resistor R0 and the capacitor C0, and the passband signal is amplified by 2 times by the parameter combination of the resistor R1 and the resistor R2. The isolation circuit 302 isolates input and output analog signals, the isolation voltage is greater than 2.5kV, the linear distortion degree is less than 0.05%, the isolation operational amplifier U2, the resistor R3/R4/R5/R6/R7 and the variable resistor VR form the isolation operational amplifier U2, the amplification error of the isolation operational amplifier U2 is about 2% generally, therefore, the isolation operational amplifier U2 only isolates the input and output signals and does not amplify the input and output signals, and the isolation operational amplifier U2 is powered by a single power supply (VCC and GND). The resistor R3 is used for limiting current and preventing the positive input end of the isolation operational amplifier U2 from being damaged by large current; the resistors R4/R5/R6/R7 and the adjustable resistor VR form a zero-setting network to ensure that when the input signal of the isolation operational amplifier U2 is 0, the output signal is also 0. The voltage-current conversion circuit 303 is composed of a current-limiting resistor R8, a power MOSFET Q1 and a load resistor R9, and the test current I flowing through the load resistor R9 changes in proportion to the base voltage of the power MOSFET Q1, so as to achieve the purpose of converting the analog voltage signal output by the isolation operational amplifier U2 into a current signal on the load. The current sampling feedback circuit 304 includes a resistor R9 and an isolation circuit, the resistor R9 is used as a resistor here, the voltage signal at the two ends of the resistor R9 reflects the test current I, and the isolation circuit has the same circuit structure as the isolation circuit 302.
As shown in fig. 3, the multi-path selection switch of the test loop selection unit 104 disclosed in this embodiment is composed of a decoder U3 and switches S0 to S7, and the digital input ports SI, SCK, and G of the decoder U3 receive serial digital signals input from the control and information processing unit, decode the serial digital signals into corresponding 8-bit control signals D0 to D7, and output the signals in parallel, thereby controlling the combination and division of the switches S0 to S7. One ends of the switches S0-S3 are connected together in parallel and connected with a test current negative end output by the test current output unit, and the other ends of the switches S0-S3 are respectively connected with the lower end of a test port of a tested article. One ends of the switches S4 to S7 are connected in parallel to each other and connected to a positive test current terminal output by the test current output unit, and the other ends of the switches S4 to S7 are connected to the upper end of a test port of the test object, for example, when D7 to D0 are 10001000, the test loop indicates that the phase a is selected.
As shown in FIG. 4, in this embodiment, the lower end N '/A'/B '/C' of the test port of the test object is connected to the test object state detection unit. As shown in fig. 5, the test object state detection unit 105 is composed of diodes D1-D4, resistors R10-R15, capacitors C1-C2, and an optical coupler U4, wherein the diodes D1-D4 rectify the N '/a'/B '/C' electrical signals at the lower end of the test object test port, and then filter the rectified electrical signals by a capacitor C1, the filtered voltage signals are divided by a current-limiting voltage-dividing resistor network composed of resistors R10-R14, and then the output pin of the optical coupler U4 is controlled to be turned on and off, accordingly, high and low level digital signals X0 are generated on the resistor-capacitor network composed of the capacitors C2 and the resistor R15, and X0 is transmitted to the control and information processing unit 101 as the test object state signals.
Claims (4)
1. The utility model provides a take automatic combined floodgate circuit breaker detection device of residual current protect function which characterized in that, includes control and information processing unit, human-computer interaction unit, test current output unit, test circuit selection unit, tested article state detecting element, wherein:
the human-computer interaction unit is connected with the control and information processing unit; the control and information processing unit is connected with the test current output unit through an analog signal port, the control and information processing unit is connected with the test loop selection unit and the on/off-shaped test article state detection unit for detecting the test article through a digital signal port, and the test current output by the test current output unit is output to any one of A, B, C three phases in the automatic switch-on circuit breaker through the test loop;
the test current output unit comprises a filter circuit, an isolation circuit, a voltage-current conversion circuit and a current sampling feedback circuit, wherein: the input end of the filter circuit is connected with the analog voltage signal output port of the control and information processing unit, the output end of the filter circuit is connected with the input end of the voltage-current conversion circuit through the isolation circuit, the output end of the voltage-current conversion circuit is connected with the test loop selection unit, meanwhile, the output end of the voltage-current conversion circuit is connected with the current sampling feedback circuit in parallel, and the current sampling feedback circuit is connected with the control and information processing unit.
2. The automatic closing circuit breaker detection device with the residual current protection function as claimed in claim 1, wherein the filter circuit comprises an operational amplifier U1A, a resistor R0, a resistor R1, a resistor R2 and a capacitor C0, a non-inverting input terminal of the operational amplifier U1A is connected to an analog voltage signal output port of the control and information processing unit through a resistor R0, and a non-inverting input terminal of the operational amplifier U1A is grounded through a capacitor C0; the inverting input terminal of the operational amplifier U1A is connected to ground via a resistor R1; a resistor R2 is connected between the inverting input end and the output end of the operational amplifier U1A; the output end of the operational amplifier U1A is connected with the isolation circuit.
3. The automatic closing circuit breaker detection device with the residual current protection function as claimed in claim 1, wherein the isolation circuit comprises an isolation operational amplifier U2, a resistor R3 and a zero setting network, and a non-inverting input terminal of the isolation operational amplifier U2 is connected with an output terminal of the operational amplifier U1A through a resistor R3; the reverse input end of the isolation operational amplifier U2 is in short circuit with the output end; the COM terminal, the VC terminal and the VS terminal of the isolation operational amplifier U2 are grounded through a zero setting network.
4. The detecting device for automatic closing circuit breaker with residual current protection as claimed in claim 1, wherein the testing circuit selecting unit is composed of multiple-way selecting switches, the control end of the multiple-way selecting switches is controlled by the control and information processing unit through digital signals, the upper end of A, B, C three-phase port in the automatic closing circuit breaker with residual current protection is connected to the output positive pole of the testing current output unit through one group of switches in the multiple-way selecting switches, the lower end of A, B, C three-phase port in the automatic closing circuit breaker with residual current protection is connected to the output negative pole of the testing current output unit through the other group of switches in the multiple-way selecting switches, the control and information processing unit is closed through one switch in one group of switches and the corresponding switch in the other group of switches, so that a, b, c and d in the automatic closing circuit breaker with residual current protection function are closed, B. And a corresponding one of the three phases C is conducted, or the control and information processing unit is disconnected through a certain switch in one group of switches and a corresponding switch in the other group of switches, so that a corresponding one of A, B, C three phases in the automatic switch-on circuit breaker with the residual current protection function is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921247812.0U CN211123155U (en) | 2019-08-02 | 2019-08-02 | Automatic closing circuit breaker detection device with residual current protection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921247812.0U CN211123155U (en) | 2019-08-02 | 2019-08-02 | Automatic closing circuit breaker detection device with residual current protection function |
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| CN211123155U true CN211123155U (en) | 2020-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456262A (en) * | 2019-08-02 | 2019-11-15 | 上海电器科学研究所（集团）有限公司 | Band residual current protecting function automatic closing detection device for circuit breaker and test method |
| CN114019872A (en) * | 2021-11-05 | 2022-02-08 | 中冶赛迪电气技术有限公司 | Circuit breaker opening and closing time sequence and fault judgment logic control system thereof |
-
2019
- 2019-08-02 CN CN201921247812.0U patent/CN211123155U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456262A (en) * | 2019-08-02 | 2019-11-15 | 上海电器科学研究所（集团）有限公司 | Band residual current protecting function automatic closing detection device for circuit breaker and test method |
| CN114019872A (en) * | 2021-11-05 | 2022-02-08 | 中冶赛迪电气技术有限公司 | Circuit breaker opening and closing time sequence and fault judgment logic control system thereof |
| CN114019872B (en) * | 2021-11-05 | 2023-11-14 | 中冶赛迪电气技术有限公司 | Circuit breaker opening and closing time sequence and fault judgment logic control system thereof |
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