CN113406487A - Lithium battery powered high-voltage circuit breaker testing equipment - Google Patents
Lithium battery powered high-voltage circuit breaker testing equipment Download PDFInfo
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- CN113406487A CN113406487A CN202110594118.1A CN202110594118A CN113406487A CN 113406487 A CN113406487 A CN 113406487A CN 202110594118 A CN202110594118 A CN 202110594118A CN 113406487 A CN113406487 A CN 113406487A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 74
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 37
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000005669 field effect Effects 0.000 claims description 22
- 239000013078 crystal Substances 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 14
- YLYPIBBGWLKELC-RMKNXTFCSA-N 2-[2-[(e)-2-[4-(dimethylamino)phenyl]ethenyl]-6-methylpyran-4-ylidene]propanedinitrile Chemical compound C1=CC(N(C)C)=CC=C1\C=C\C1=CC(=C(C#N)C#N)C=C(C)O1 YLYPIBBGWLKELC-RMKNXTFCSA-N 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
Abstract
The invention relates to a high-voltage circuit breaker testing device powered by a lithium battery, which comprises a main control circuit, a direct-current voltage sampling circuit, an opening and closing time sampling circuit, a sensor stroke sampling circuit and a power supply circuit, wherein the power supply circuit is electrically connected with the main control circuit and the direct-current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are provided with detection ends connected with a circuit breaker to be tested, the direct-current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are electrically connected with the main control circuit, the direct-current voltage sampling circuit acquires a voltage signal of the circuit breaker to be tested, the opening and closing time sampling circuit acquires an opening and closing signal of the circuit breaker to be tested, the sensor stroke sampling circuit acquires a stroke of a sensor and generates a stroke signal, and the main control circuit receives the voltage signal, the opening and closing signal and the stroke signal, and determining the turn-off speed of the circuit breaker to be tested.
Description
Technical Field
The invention relates to the technical field of detection instruments, in particular to a high-voltage circuit breaker testing device powered by a lithium battery.
Background
A High voltage circuit breaker (High voltage circuit breaker) is a special electric appliance that turns on or off a High voltage circuit in a normal or fault condition, and is one of important electric appliance elements in the High voltage circuit for control purposes.
One of the important performance criteria of a high voltage circuit breaker is its turn-off speed. In the prior art, a sensor is adopted to acquire the rotating speed of a high-voltage circuit breaker so as to determine the turn-off speed.
However, most of the existing high-voltage circuit breaker testing equipment has large volume and complex circuits, is greatly inconvenient to install, debug and maintain, frequently finds faults in the daily maintenance process, and cannot guarantee the reliability.
Disclosure of Invention
In view of this, the present invention provides a lithium battery powered high voltage circuit breaker testing apparatus, which can solve the above technical problems.
In order to achieve the above object, the technical solution of the present invention for solving the technical problem is to provide a high voltage circuit breaker testing device powered by a lithium battery, comprising:
the device comprises a main control circuit, a direct current voltage sampling circuit, an opening and closing time sampling circuit, a sensor stroke sampling circuit and a power supply circuit, wherein the power supply circuit is electrically connected with the main control circuit and the direct current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are provided with a detection end connected with a circuit breaker to be detected, the direct current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are electrically connected with the main control circuit, the direct current voltage sampling circuit acquires a voltage signal of the circuit breaker to be detected, the opening and closing time sampling circuit acquires an opening and closing signal of the circuit breaker to be detected, the sensor stroke sampling circuit acquires a stroke of a sensor and generates a stroke signal, and the main control circuit receives the voltage signal, the opening and closing signal and the stroke signal, and determining the turn-off speed of the circuit breaker to be tested.
Further, the main control circuit comprises a main control chip U16, a digital-to-analog conversion chip U9, a crystal oscillator Y2, a crystal oscillator Y3, a resistor R29, a resistor R68, a capacitor C20 and a capacitor C22, wherein one end of the crystal oscillator Y3 is electrically connected with a pin P0 of the main control chip U16 and one end of the capacitor C20, the other end of the crystal oscillator Y3 is electrically connected with a pin P1 of the main control chip U16 and one end of the capacitor C22, the other end of the capacitor C20 and the other end of the capacitor C22 are grounded, one end of the resistor R68 is electrically connected with a VDDA pin of the main control chip U16, and the other end of the resistor R68 is connected with a VCC level; the digital-to-analog conversion chip U8's SDI pin, CS pin respectively with main control chip U16's PB7 pin, BOOT0 pin electricity are connected, the both ends of crystal oscillator Y2 respectively with digital-to-analog conversion chip U8's CIN pin, XOUT pin electricity are connected, resistance R29 one end with digital-to-analog conversion chip U9's VD + pin electricity is connected, resistance R29 another termination VCC level, digital-to-analog conversion chip U9's AIN2+ pin, AIN5+ pin respectively with direct current voltage sampling circuit, sensor stroke sampling circuit electricity is connected, main control chip U16's PA0 pin, PA1 pin with divide-shut brake time sampling circuit electricity is connected.
Further, the specific model of the main control chip U16 is STM32F103 RE.
Further, the dc voltage sampling circuit includes a current signal sensor H1, a resistor R40, an amplifier U12B, and a resistor R37, wherein an output terminal of the current signal sensor H1 and one end of the resistor R40 are electrically connected to a positive phase input terminal of the amplifier U12B, the other end of the resistor R40 is grounded, one end of the resistor R37 is electrically connected to a negative phase input terminal of the amplifier U12B, the other end of the resistor R37 is electrically connected to an output terminal of the amplifier U12B, and an output terminal of the amplifier U12B is electrically connected to an AIN5+ pin of the digital-to-analog conversion chip U9.
Further, the specific model of the current signal sensor H1 is DHB, and the specific model of the amplifier U12B is TL 082.
Further, the switching-on and switching-off time sampling circuit comprises a driver U13, a DC/DC chip DCM1, a field effect transistor Q1 and a field effect transistor Q2, wherein a pin 1C of the driver U13 is electrically connected with a gate of the field effect transistor Q1, a pin 2C of the driver U13 is electrically connected with a gate of the field effect transistor Q2, and a pin 1B and a pin 2B of the driver U13 are electrically connected with a main control chip U16; the VOUT pin of the DC/DC chip DCM1 is electrically connected with the drain electrode of the field effect transistor Q1 and the drain electrode of the field effect transistor Q2.
Further, the specific model of the driver U13 is ULN2003, and the specific models of the fet Q1 and the fet Q2 are FGA25N 120.
Further, the sensor stroke sampling circuit 4 includes a resistor R31, a resistor R33, a resistor R35, a diode D6, a diode D7, and an amplifier U12A, wherein one end of the resistor R31, one end of the resistor R33, an anode of the diode D6, and a cathode of the diode D7 form an input end of a connection sensor, the other end of the resistor R31 is electrically connected to a third pin of the amplifier U12A, a cathode of the diode D6 is electrically connected to a 12V voltage, an anode of the diode D7 and the other end of the resistor R33 are electrically connected to a fourth pin of the amplifier U12A, one end of the resistor R35 is electrically connected to a second pin of the amplifier U12A, and the other end of the resistor R35 and a first pin of the amplifier U12A are electrically connected to an AIN2+ pin of the digital-to-analog conversion chip U9.
Further, the power supply circuit comprises a lithium battery pack, a power supply chip WQ2, an inductor L2, a polar capacitor E2, a polar capacitor E4, and a diode D33, wherein an anode of the lithium battery pack is electrically connected with a VI pin of the power supply chip WQ2 and an anode of the polar capacitor E2, a VO pin of the power supply chip WQ2 is electrically connected with one end of the inductor L2 and a cathode of the diode D33, an anode of the diode D33 is electrically connected with a cathode of the polar capacitor E2 and a cathode of the polar capacitor E4, an anode of the polar capacitor E4, an FB pin of the power supply chip WQ2 and the other end of the inductor L2 form a VCC output terminal, and a GND pin of the power supply chip WQ2 is grounded.
Further, the specific model of the power supply chip WQ2 is LM2576 HV.
Compared with the prior art, the lithium battery powered high-voltage circuit breaker testing equipment provided by the invention has the following beneficial effects:
the high-voltage circuit breaker testing equipment powered by the lithium battery can obtain the turn-off speed of the circuit breaker by respectively collecting the voltage signal, the opening and closing signal of the circuit breaker and the stroke signal of the sensor.
Drawings
Fig. 1 is a schematic structural diagram of a lithium battery-powered high-voltage circuit breaker testing device according to an embodiment of the present invention;
FIGS. 2A and 2B are circuit diagrams of the main control circuit in FIG. 1;
FIG. 3 is a circuit diagram of the DC voltage sampling circuit of FIG. 2;
FIG. 4 is a circuit diagram of the switching on/off time sampling circuit of FIG. 2;
FIG. 5 is a circuit diagram of the sensor stroke sampling circuit of FIG. 2;
fig. 6 is a circuit diagram of the power supply circuit of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 6, a testing apparatus for a lithium battery powered high voltage circuit breaker according to a first embodiment of the present invention includes: the device comprises a main control circuit 1, a direct current voltage sampling circuit 2, an opening and closing time sampling circuit 3, a sensor stroke sampling circuit 4 and a power supply circuit 5, wherein the power supply circuit 5 is electrically connected with the main control circuit 1 and the direct current voltage sampling circuit 2 and supplies power to the main control circuit 1 and the direct current voltage sampling circuit 2, the opening and closing time sampling circuit 3 and the sensor stroke sampling circuit 4 are provided with a detection end connected with a circuit breaker to be detected, the direct current voltage sampling circuit 2, the opening and closing time sampling circuit 3 and the sensor stroke sampling circuit 4 are electrically connected with the main control circuit 1, the direct current voltage sampling circuit 2 acquires a voltage signal of the circuit breaker to be detected, the opening and closing time sampling circuit 3 acquires an opening and closing signal of the circuit breaker to be detected, the sensor stroke sampling circuit 4 acquires a stroke of a sensor and generates a stroke signal, and the main control circuit 1 receives the voltage signal, the opening and closing signal and the travel signal and determines the turn-off speed of the circuit breaker to be tested.
Specifically, the main control circuit 1 includes a main control chip U16, a digital-to-analog conversion chip U9, a crystal oscillator Y2, a crystal oscillator Y3, a resistor R29, a resistor R68, a capacitor C20, and a capacitor C22, wherein one end of the crystal oscillator Y3 is electrically connected to a pin P0 of the main control chip U16 and one end of the capacitor C20, the other end of the crystal oscillator Y3 is electrically connected to a pin P1 of the main control chip U16 and one end of the capacitor C22, the other end of the capacitor C20 and the other end of the capacitor C22 are grounded, one end of the resistor R68 is electrically connected to a VDDA pin of the main control chip U16, and the other end of the resistor R68 is connected to a VCC level; digital analog conversion chip U8's SDI pin, CS pin respectively with main control chip U16's PB7 pin, BOOT0 pin electricity are connected, the both ends of crystal oscillator Y2 respectively with digital analog conversion chip U8's CIN pin, XOUT pin electricity are connected, resistance R29 one end with digital analog conversion chip U9's VD + pin electricity is connected, resistance R29 another termination VCC level, digital analog conversion chip U9's AIN2+ pin, AIN5+ pin respectively with direct current voltage sampling circuit 2 sensor stroke sampling circuit 4 electricity is connected, main control chip U16's PA0 pin, PA1 pin with divide-shut brake time sampling circuit 3 is connected electrically.
The crystal oscillator Y3 and the capacitors C20 and C21 form an oscillating circuit and provide working clock pulses for the singlechip U16. In addition, a mode of starting the single chip microcomputer is provided, and BOOT0 and BOOT1 are respectively connected to a pin 60 and a pin 28 of the single chip microcomputer.
The specific model of the main control chip U16 is STM32F103 RE.
The direct current voltage sampling circuit 2 comprises a current signal sensor H1, a resistor R40, an amplifier U12B and a resistor R37, wherein the output end of the current signal sensor H1 and one end of the resistor R40 are electrically connected with the positive phase input end of the amplifier U12B, the other end of the resistor R40 is grounded, one end of the resistor R37 is electrically connected with the negative phase input end of the amplifier U12B, the other end of the resistor R37 is electrically connected with the output end of the amplifier U12B, and the output end of the amplifier U12B is electrically connected with an AIN5+ pin of the digital-to-analog conversion chip U9.
The output signal of the current signal sensor is connected with a resistor R40 and then connected to a pin 5 of a follower U12, and then the output of the pin 7 is connected to a pin 5 (IN5+) of an analog-to-digital converter U9.
The specific model of the current signal sensor H1 is DHB, and the specific model of the amplifier U12B is TL 082.
Specifically, the switching-on/off time sampling circuit 3 comprises a driver U13, a DC/DC chip DCM1, a field-effect transistor Q1 and a field-effect transistor Q2, wherein a pin 1C of the driver U13 is electrically connected with a gate of the field-effect transistor Q1, a pin 2C of the driver U13 is electrically connected with a gate of the field-effect transistor Q2, and a pin 1B and a pin 2B of the driver U13 are electrically connected with the main control chip U16; the VOUT pin of the DC/DC chip DCM1 is electrically connected with the drain electrode of the field effect transistor Q1 and the drain electrode of the field effect transistor Q2.
The driving power supply of the opening and closing is obtained by 48V output of the lithium battery pack through conversion of the DC/DC module, the output adjustment of the DC/DC conversion module is controlled by the D/A output of the single chip microcomputer, and the D/A output is connected to 20 pins of the single chip microcomputer U16.
The specific model of the driver U13 is ULN2003, and the specific models of the field effect transistor Q1 and the field effect transistor Q2 are FGA25N 120.
The sensor stroke sampling circuit 4 comprises a resistor R31, a resistor R33, a resistor R35, a diode D6, a diode D7 and an amplifier U12A, wherein one end of the resistor R31, one end of the resistor R33, an anode of the diode D6 and a cathode of the diode D7 form an input end connected with a sensor, the other end of the resistor R31 is electrically connected with a third pin of the amplifier U12A, a cathode of the diode D6 is electrically connected with a 12V voltage, an anode of the diode D7 and the other end of the resistor R33 are electrically connected with a fourth pin of the amplifier U12A, one end of the resistor R35 is electrically connected with a second pin of the amplifier U12A, and the other end of the resistor R35 and a first pin of the amplifier U12A are electrically connected with an AIN2+ pin of the digital-to-analog conversion chip U9.
The range sensor signal is connected to the 3 pin of the follower U12 through a resistor R31, and then output from the 1 pin of U12 to the 4 pin (IN2+) of the analog-to-digital converter U9.
The DC driving power supply is sampled by voltage dividing resistors R48, R50 and R55 and is connected to the 2 pins of the amplifier U14 through a resistor R54. The amplified signal is connected to pin 6 (IN6+) of the analog-to-digital converter U9 through a resistor R49.
The ADC digital-to-analog converter U5 is controlled by the singlechip U16, and the pins 14, 10, 17 and 11 are respectively serial data output, serial data input, clock pulse and chip selection, and are respectively connected to the pins 10, 11, 59 and 61 of the singlechip U16.
The specific model of the amplifier U12A is TL 082.
The power supply circuit 5 comprises a lithium battery pack, a power supply chip WQ2, an inductor L2, a polar capacitor E2, a polar capacitor E4 and a diode D33, wherein the positive electrode of the lithium battery pack is electrically connected with the VI pin of the power supply chip WQ2 and the positive electrode of the polar capacitor E2, the VO pin of the power supply chip WQ2 is electrically connected with one end of the inductor L2 and the cathode of the diode D33, the positive electrode of the diode D33 is electrically connected with the cathode of the polar capacitor E2 and the cathode of the polar capacitor E4, the positive electrode of the polar capacitor E4, the FB pin of the power supply chip WQ2 and the other end of the inductor L2 form a VCC output terminal, and the GND pin of the power supply chip WQ2 is grounded.
The specific model of the power supply chip WQ2 is LM2576 HV.
The power supply circuit 5 supplies power to the main control circuit 1 and the direct current voltage sampling circuit 2, the direct current voltage sampling circuit 2 acquires a voltage signal of a circuit breaker to be tested, the switching-on and switching-off time sampling circuit 3 acquires a switching-on and switching-off signal of the circuit breaker to be tested, the sensor stroke sampling circuit 4 acquires a stroke of a sensor and generates a stroke signal, the main control circuit 1 receives the voltage signal, the switching-on and switching-off signal and the stroke signal, determines the turn-off time of the circuit breaker to be tested according to the voltage signal and the switching-on and switching-off signal, and then combines the stroke signal to obtain the turn-off speed of the circuit breaker.
The high-voltage circuit breaker testing equipment powered by the lithium battery can obtain the turn-off speed of the circuit breaker by respectively collecting the voltage signal, the opening and closing signal of the circuit breaker and the stroke signal of the sensor.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lithium battery powered high voltage circuit breaker testing apparatus, comprising:
the device comprises a main control circuit, a direct current voltage sampling circuit, an opening and closing time sampling circuit, a sensor stroke sampling circuit and a power supply circuit, wherein the power supply circuit is electrically connected with the main control circuit and the direct current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are provided with a detection end connected with a circuit breaker to be detected, the direct current voltage sampling circuit, the opening and closing time sampling circuit and the sensor stroke sampling circuit are electrically connected with the main control circuit, the direct current voltage sampling circuit acquires a voltage signal of the circuit breaker to be detected, the opening and closing time sampling circuit acquires an opening and closing signal of the circuit breaker to be detected, the sensor stroke sampling circuit acquires a stroke of a sensor and generates a stroke signal, and the main control circuit receives the voltage signal, the opening and closing signal and the stroke signal, and determining the turn-off speed of the circuit breaker to be tested.
2. A lithium battery powered high voltage circuit breaker testing device according to claim 1, characterized in that:
the main control circuit comprises a main control chip U16, a digital-to-analog conversion chip U9, a crystal oscillator Y2, a crystal oscillator Y3, a resistor R29, a resistor R68, a capacitor C20 and a capacitor C22, wherein one end of the crystal oscillator Y3 is electrically connected with a P0 pin of a main control chip U16 and one end of the capacitor C20, the other end of the crystal oscillator Y3 is electrically connected with a P1 pin of the main control chip U16 and one end of the capacitor C22, the other end of the capacitor C20 and the other end of the capacitor C22 are grounded, one end of the resistor R68 is electrically connected with a VDDA pin of the main control chip U16, and the other end of the resistor R68 is connected with a VCC level; the digital-to-analog conversion chip U8's SDI pin, CS pin respectively with main control chip U16's PB7 pin, BOOT0 pin electricity are connected, the both ends of crystal oscillator Y2 respectively with digital-to-analog conversion chip U8's CIN pin, XOUT pin electricity are connected, resistance R29 one end with digital-to-analog conversion chip U9's VD + pin electricity is connected, resistance R29 another termination VCC level, digital-to-analog conversion chip U9's AIN2+ pin, AIN5+ pin respectively with direct current voltage sampling circuit, sensor stroke sampling circuit electricity is connected, main control chip U16's PA0 pin, PA1 pin with divide-shut brake time sampling circuit electricity is connected.
3. A lithium battery powered high voltage circuit breaker testing device according to claim 2, characterized in that:
the specific model of the main control chip U16 is STM32F103 RE.
4. A lithium battery powered high voltage circuit breaker testing device according to claim 2, characterized in that:
the direct-current voltage sampling circuit comprises a current signal sensor H1, a resistor R40, an amplifier U12B and a resistor R37, wherein the output end of the current signal sensor H1 and one end of a resistor R40 are electrically connected with the positive phase input end of an amplifier U12B, the other end of the resistor R40 is grounded, one end of the resistor R37 is electrically connected with the negative phase input end of an amplifier U12B, the other end of the resistor R37 is electrically connected with the output end of the amplifier U12B, and the output end of the amplifier U12B is electrically connected with an AIN5+ pin of a digital-to-analog conversion chip U9.
5. A lithium battery powered high voltage circuit breaker testing device according to claim 4, characterized in that:
the specific model of the current signal sensor H1 is DHB, and the specific model of the amplifier U12B is TL 082.
6. A lithium battery powered high voltage circuit breaker testing device according to claim 2, characterized in that:
the switching-on and switching-off time sampling circuit comprises a driver U13, a DC/DC chip DCM1, a field effect transistor Q1 and a field effect transistor Q2, wherein a pin 1C of the driver U13 is electrically connected with a gate of the field effect transistor Q1, a pin 2C of the driver U13 is electrically connected with a gate of the field effect transistor Q2, and a pin 1B and a pin 2B of the driver U13 are electrically connected with a main control chip U16; the VOUT pin of the DC/DC chip DCM1 is electrically connected with the drain electrode of the field effect transistor Q1 and the drain electrode of the field effect transistor Q2.
7. A lithium battery powered high voltage circuit breaker testing device according to claim 6, characterized in that:
the specific model of the driver U13 is ULN2003, and the specific models of the field effect transistor Q1 and the field effect transistor Q2 are FGA25N 120.
8. A lithium battery powered high voltage circuit breaker testing device according to claim 2, characterized in that:
the sensor stroke sampling circuit 4 comprises a resistor R31, a resistor R33, a resistor R35, a diode D6, a diode D7 and an amplifier U12A, wherein one end of the resistor R31, one end of the resistor R33, an anode of the diode D6 and a cathode of the diode D7 form an input end connected with a sensor, the other end of the resistor R31 is electrically connected with a third pin of the amplifier U12A, a cathode of the diode D6 is electrically connected with a 12V voltage, an anode of the diode D7 and the other end of the resistor R33 are electrically connected with a fourth pin of the amplifier U12A, one end of the resistor R35 is electrically connected with a second pin of the amplifier U12A, and the other end of the resistor R35 and a first pin of the amplifier U12A are electrically connected with an AIN2+ pin of the digital-to-analog conversion chip U9.
9. A lithium battery powered high voltage circuit breaker testing device according to claim 2, characterized in that:
the power supply circuit comprises a lithium battery pack, a power supply chip WQ2, an inductor L2, a polar capacitor E2, a polar capacitor E4 and a diode D33, wherein the anode of the lithium battery pack is electrically connected with a VI pin of the power supply chip WQ2 and the anode of the polar capacitor E2, the VO pin of the power supply chip WQ2 is electrically connected with one end of the inductor L2 and the cathode of the diode D33, the anode of the diode D33 is electrically connected with the cathode of the polar capacitor E2 and the cathode of the polar capacitor E4, the anode of the polar capacitor E4, the FB pin of the power supply chip WQ2 and the other end of the inductor L2 form a VCC output end, and the GND pin of the power supply chip WQ2 is grounded.
10. A lithium battery powered high voltage circuit breaker testing device according to claim 9, characterized in that:
the specific model of the power supply chip WQ2 is LM2576 HV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594118.1A CN113406487A (en) | 2021-05-28 | 2021-05-28 | Lithium battery powered high-voltage circuit breaker testing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110594118.1A CN113406487A (en) | 2021-05-28 | 2021-05-28 | Lithium battery powered high-voltage circuit breaker testing equipment |
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| Publication Number | Publication Date |
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| CN113406487A true CN113406487A (en) | 2021-09-17 |
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| CN202110594118.1A Pending CN113406487A (en) | 2021-05-28 | 2021-05-28 | Lithium battery powered high-voltage circuit breaker testing equipment |
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Citations (5)
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| CN203368410U (en) * | 2013-08-08 | 2013-12-25 | 上海理工大学 | Pre-amplification circuit capable of realizing automatic gain adjustment for current output-type sensor |
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| CN109412542A (en) * | 2018-12-10 | 2019-03-01 | 中国航发南方工业有限公司 | Pressure signal conditioning circuit and electronic controller |
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2021
- 2021-05-28 CN CN202110594118.1A patent/CN113406487A/en active Pending
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|---|---|---|---|---|
| CN203368410U (en) * | 2013-08-08 | 2013-12-25 | 上海理工大学 | Pre-amplification circuit capable of realizing automatic gain adjustment for current output-type sensor |
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| CN206480526U (en) * | 2017-02-27 | 2017-09-08 | 深圳市东升源电气设备有限公司 | Gas-filling cabinet F cabinet electric controllers |
| CN106950492A (en) * | 2017-03-12 | 2017-07-14 | 武汉市欧睿科技有限公司 | Portable high-pressure switchs dynamic characteristics tester |
| CN109412542A (en) * | 2018-12-10 | 2019-03-01 | 中国航发南方工业有限公司 | Pressure signal conditioning circuit and electronic controller |
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Application publication date: 20210917 |
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| RJ01 | Rejection of invention patent application after publication |