CN112731132A - High-speed circuit breaker closing test system - Google Patents
High-speed circuit breaker closing test system Download PDFInfo
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- CN112731132A CN112731132A CN202011553691.XA CN202011553691A CN112731132A CN 112731132 A CN112731132 A CN 112731132A CN 202011553691 A CN202011553691 A CN 202011553691A CN 112731132 A CN112731132 A CN 112731132A
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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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
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Abstract
The invention relates to the technical field of high-speed circuit breakers, and discloses a high-speed circuit breaker closing test system, which comprises a high-speed circuit breaker and a coil inside the high-speed circuit breaker, and also comprises: the current analog quantity conversion module is used for performing analog quantity conversion on current, namely converting a current value into a voltage value corresponding to the current value; the singlechip is used for processing and judging data and outputting a control signal; the voltage detection module is used for acquiring voltages at two ends of the high-speed circuit breaker coil, then performing A/D conversion, converting the voltage value into corresponding 8-bit digital quantity and transmitting the digital quantity to the single chip microcomputer; the temperature detection module is used for detecting the temperature of the high-speed circuit breaker coil in real time; and the display screen is used for displaying the data parameters. Before the high-voltage test is carried out on the high-speed circuit breaker, the main faults of the high-speed circuit breaker can be eliminated through the method, so that the high-voltage test of the high-speed circuit breaker can be smoothly carried out, and the test data can be displayed through the display screen.
Description
Technical Field
The invention relates to the technical field of high-speed circuit breakers, in particular to a high-speed circuit breaker closing test system.
Background
Each traction inverter input circuit of the rail vehicle is protected by a separate high-speed circuit breaker, and the high-speed circuit breaker is only used for a traction loop. The high-speed circuit breaker has the functions that when the system is in fault and overcurrent is caused, the high-speed circuit breaker is matched with the protection device and the braking device to quickly cut off a main loop, so that the accident is prevented from being enlarged, and rear-end equipment is protected from being damaged due to current impact.
In order to ensure the normal operation of the high-speed circuit breaker, the high-speed circuit breaker needs to be tested frequently, but the testing link of the existing high-speed circuit breaker can only complete the basic closing and maintaining test on the high-speed circuit breaker, cannot detect data such as the coil resistance, current, voltage, temperature and the like of the high-speed circuit breaker in real time, cannot judge whether the current high-speed circuit breaker is in a normal state, and cannot realize the protection of overvoltage, overcurrent and overtemperature in the test.
The Chinese patent publication number is: CN108054732B patent of invention, which discloses a holding circuit of a high-speed circuit breaker, in which a main contact of a first contactor, a holding resistor, and the high-speed circuit breaker are connected in series to form a first branch; the main contact of the second contactor is connected with the holding resistor in parallel; the auxiliary normally open contact of the first contactor, the normally closed contact of the intermediate relay and the first contactor are connected in series to form a second branch circuit; the first time relay, the second contactor and a branch formed by connecting the normally closed contacts of the first time relay in series are respectively connected with the first contactor in parallel; the second time relay is connected between the negative electrode of the power supply and the second end of the main contact of the second contactor; the closing button is connected between the positive pole of the power supply and the second end of the first time relay; the second end of the first time relay is connected with the second end of the first contactor; a normally open contact of the second time relay is connected with the intermediate relay in series to form a third branch circuit; the three branches are connected in parallel between the anode and the cathode. The circuit provided by the embodiment of the invention can ensure that the coil of the high-speed circuit breaker is not damaged.
Although the above patent has a holding circuit to ensure that the coil of the high-speed circuit breaker is not damaged, the data such as resistance, current, voltage and temperature of the coil of the high-speed circuit breaker cannot be detected in real time, and improvement is needed.
Based on the above, a high-speed circuit breaker closing test system is provided, and hopefully, the defects in the prior art are overcome.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-speed circuit breaker closing test system which has the advantage of being capable of detecting data such as resistance, current, voltage, temperature and the like of a coil of a high-speed circuit breaker in real time.
(II) technical scheme
In order to realize the purpose of detecting data such as resistance, current, voltage, temperature and the like of the high-speed circuit breaker coil in real time, the invention provides the following technical scheme: a high speed circuit breaker closure test system, includes the inside coil of high speed circuit breaker and high speed circuit breaker, still includes:
the current analog quantity conversion module is used for performing analog quantity conversion on current, namely converting a current value into a voltage value corresponding to the current value;
the singlechip is used for processing and judging data and outputting a control signal;
the voltage detection module is used for acquiring voltages at two ends of the high-speed circuit breaker coil, then performing A/D conversion, converting the voltage value into corresponding 8-bit digital quantity and transmitting the digital quantity to the single chip microcomputer;
the temperature detection module is used for detecting the temperature of the high-speed circuit breaker coil in real time;
and the display screen is used for displaying the data parameters.
As a preferred technical solution of the present invention, the current analog conversion module performs analog conversion of current by using ACS712ELCTR-20A, that is, a current value is converted into a voltage value corresponding to the current value, and then the current value is subjected to a/D conversion by the single chip microcomputer to obtain a corresponding 10-bit digital quantity.
As a preferred technical scheme of the invention, the voltage detection module uses an ADC0804LCN chip.
In a preferred embodiment of the present invention, the temperature detection module uses a DS18B20 digital temperature sensor.
As a preferred technical scheme of the invention, the testing device further comprises a testing box body, the single chip microcomputer is installed in the testing box body, a fan is further arranged inside the testing box body, and the input end of the fan is electrically connected with the output end of the temperature detection module.
As a preferred technical scheme of the invention, the output end of the singlechip is also electrically connected with a computer for receiving test data and monitoring the state of the system.
(III) advantageous effects
Compared with the prior art, the invention provides a high-speed circuit breaker closing test system which has the following beneficial effects:
1. according to the high-speed circuit breaker closing test system, ADC0804LCN is used for voltage conversion of a main loop, ACS712ELCTR-20A is used for current conversion of the main loop, DS18B20 is used for temperature detection, data such as resistance, current, voltage and temperature of a coil of the high-speed circuit breaker can be detected in real time, and normal operation of the high-speed circuit breaker is guaranteed.
2. According to the high-speed circuit breaker closing test system, before high-voltage test is carried out on a high-speed circuit breaker, main faults of the high-speed circuit breaker can be eliminated through the high-speed circuit breaker closing test system, so that the high-voltage test of the high-speed circuit breaker can be smoothly carried out, and due to the fact that the test link is not available in the previous overhaul process, 1800A large current is directly connected into the undetected high-speed circuit breaker, certain potential safety hazards exist.
Drawings
FIG. 1 is a schematic diagram of a system framework of the present invention;
fig. 2 is a schematic diagram of the circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, a high-speed circuit breaker closing test system includes a high-speed circuit breaker and a coil inside the high-speed circuit breaker, and further includes:
and the current analog quantity conversion module is used for performing analog quantity conversion on the current, namely converting the current value into a voltage value corresponding to the current value, and obtaining a corresponding 10-bit digital quantity through A/D conversion of the singlechip.
The singlechip is used for processing and judging data and outputting a control signal;
the voltage detection module is used for acquiring voltages at two ends of the high-speed circuit breaker coil, then performing A/D conversion, converting the voltage value into corresponding 8-bit digital quantity and transmitting the digital quantity to the single chip microcomputer;
the temperature detection module is used for detecting the temperature of the high-speed circuit breaker coil in real time;
and the display screen is used for displaying the data parameters.
In this embodiment, the current analog-to-digital conversion module performs analog-to-digital conversion of the current by using the ACS712ELCTR-20A, that is, the current value is converted into a voltage value corresponding to the current value, and then the current value is subjected to a/D conversion by the single chip microcomputer to obtain a corresponding 10-bit digital quantity.
In this embodiment, the voltage detection module uses ADC0804LCN chip, and this chip can gather the voltage difference at coil both ends, then carries out a/D conversion, converts the voltage value into corresponding 8 digit numerical quantity and passes to the singlechip.
In this embodiment, the resistance value can be calculated by ohm's law according to the voltage and current data.
In this embodiment, the temperature detection module uses a DS18B20 digital temperature sensor, and the digital temperature sensor can realize data interaction between the single chip microcomputer and the temperature sensor only by one data line, thereby achieving the purpose of detecting the temperature of the test box and the temperature of the coil of the high-speed circuit breaker in real time.
In this embodiment, still including the test box body, the singlechip is installed in the test box body, and the inside of test box body still is provided with the fan, the input of fan and temperature detection module's output electric connection, and when the temperature of test box body was higher than the uniform temperature, the fan will start by oneself, dispels the heat to the test box body, just can stop until the temperature falls to the uniform temperature.
In the embodiment, the output end of the singlechip is also electrically connected with a computer for receiving test data and monitoring the state of the system, the system enters a protection mode by sampling voltage, current and temperature values and comparing the values with a preset value range, when the values acquired by the system within a specified time are not in a standard range set by a program, a main circuit contactor is disconnected through a relay on a PCB board, and an input power supply of a coil of a high-speed circuit breaker is cut off, so that the aim of protecting the high-speed circuit breaker is fulfilled, after the system enters the protection mode, the system displays various actually measured data on a display screen and prompts fault information, a serial port communication function is also used on the singlechip, the singlechip is connected with the computer through a serial port, the data can be transmitted to the computer in real time, the state of the system is monitored, and the acquisition state of each data can be observed, the method is greatly helpful for repairing the fault of the PCB or the fault of the high-speed circuit breaker.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a high speed circuit breaker closure test system, includes the inside coil of high speed circuit breaker and high speed circuit breaker, its characterized in that: further comprising:
the current analog quantity conversion module is used for performing analog quantity conversion on current, namely converting a current value into a voltage value corresponding to the current value;
the singlechip is used for processing and judging data and outputting a control signal;
the voltage detection module is used for acquiring voltages at two ends of the high-speed circuit breaker coil, then performing A/D conversion, converting the voltage value into corresponding 8-bit digital quantity and transmitting the digital quantity to the single chip microcomputer;
the temperature detection module is used for detecting the temperature of the high-speed circuit breaker coil in real time;
and the display screen is used for displaying the data parameters.
2. A high speed circuit breaker closure test system as claimed in claim 1, wherein: the current analog quantity conversion module performs analog quantity conversion of current by using the ACS712ELCTR-20A, namely, the current value is converted into a voltage value corresponding to the current value, and the corresponding 10-bit digital quantity is obtained through A/D conversion of the single chip microcomputer.
3. A high speed circuit breaker closure test system as claimed in claim 1, wherein: the voltage detection module uses an ADC0804LCN chip.
4. A high speed circuit breaker closure test system as claimed in claim 1, wherein: the temperature detection module uses a DS18B20 digital temperature sensor.
5. A high speed circuit breaker closure test system as claimed in claim 1, wherein: still include the test box body, the singlechip is installed in the test box body, the inside of test box body still is provided with the fan, the input of fan and temperature detection module's output electric connection.
6. A high speed circuit breaker closure test system as claimed in claim 1, wherein: the output end of the single chip microcomputer is also electrically connected with a computer and used for receiving test data and monitoring the state of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553691.XA CN112731132A (en) | 2020-12-24 | 2020-12-24 | High-speed circuit breaker closing test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553691.XA CN112731132A (en) | 2020-12-24 | 2020-12-24 | High-speed circuit breaker closing test system |
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| CN112731132A true CN112731132A (en) | 2021-04-30 |
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| CN202011553691.XA Pending CN112731132A (en) | 2020-12-24 | 2020-12-24 | High-speed circuit breaker closing test system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736621A (en) * | 2012-07-05 | 2012-10-17 | 中南大学 | Detection system of electrical equipment of urban rail vehicle |
| CN106655111A (en) * | 2016-10-20 | 2017-05-10 | 国家电网公司 | Circuit breaker tripping and closing coil real-time measurement and control protection device and protection method |
| CN109471021A (en) * | 2018-01-05 | 2019-03-15 | 国家电网公司 | The device and method for detecting high-voltage circuit-breaker switching on-off performance |
| WO2020098333A1 (en) * | 2018-11-15 | 2020-05-22 | 中车株洲电力机车有限公司 | Arrival grounding safety monitoring system for rubber-wheeled rail vehicle |
| CN211318677U (en) * | 2019-11-25 | 2020-08-21 | 南京轨道交通***工程有限公司 | High-voltage high-speed circuit breaker testing device |
-
2020
- 2020-12-24 CN CN202011553691.XA patent/CN112731132A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736621A (en) * | 2012-07-05 | 2012-10-17 | 中南大学 | Detection system of electrical equipment of urban rail vehicle |
| CN106655111A (en) * | 2016-10-20 | 2017-05-10 | 国家电网公司 | Circuit breaker tripping and closing coil real-time measurement and control protection device and protection method |
| CN109471021A (en) * | 2018-01-05 | 2019-03-15 | 国家电网公司 | The device and method for detecting high-voltage circuit-breaker switching on-off performance |
| WO2020098333A1 (en) * | 2018-11-15 | 2020-05-22 | 中车株洲电力机车有限公司 | Arrival grounding safety monitoring system for rubber-wheeled rail vehicle |
| CN211318677U (en) * | 2019-11-25 | 2020-08-21 | 南京轨道交通***工程有限公司 | High-voltage high-speed circuit breaker testing device |
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Application publication date: 20210430 |