CN215263720U - Tester capable of measuring contact resistance and opening and closing time of high-voltage switch - Google Patents
Tester capable of measuring contact resistance and opening and closing time of high-voltage switch Download PDFInfo
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- CN215263720U CN215263720U CN202121224009.2U CN202121224009U CN215263720U CN 215263720 U CN215263720 U CN 215263720U CN 202121224009 U CN202121224009 U CN 202121224009U CN 215263720 U CN215263720 U CN 215263720U
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Abstract
The utility model relates to the technical field of electrical equipment, and discloses a tester capable of measuring both contact resistance and switching-off and switching-on time of a high-voltage switch, which comprises a current source module, wherein the output end of the current source module is electrically connected with a signal amplification module; the first signal amplification module acquires a standard resistor R through the current source module outputting constant currentOVoltage signal U acrossOThe second amplification module collects the resistor R to be testedXVoltage signal U acrossXTwo voltagesThe signal is filtered and amplified by the signal amplification module and then sent to the AD chip conversion module, and the signal is calculated and processed by the CPU module to finally obtain the resistor R to be measuredXThe value of (2) reaches the effect of measuring the contact resistance of the high-voltage switch, the high-voltage switch coil is powered on through an instrument, the timing unit module is started, the relay is closed, the timing unit module is in signal communication with the AD chip conversion module, and the timing unit module finishes timing after the high-voltage switch is disconnected (or closed), so that the effect of measuring the opening and closing time of the high-voltage switch is achieved.
Description
Technical Field
The utility model relates to an electrical equipment technical field specifically is a tester of not only measurable quantity high tension switchgear contact resistance but also measurable quantity its divide-shut brake time.
Background
At present, two instruments are needed to measure the contact resistance and the opening and closing time of a high-voltage switch respectively, a loop resistance tester is used for measuring the contact resistance, a high-voltage switch mechanical characteristic tester is used for measuring the opening and closing time, the on-site test process comprises the steps of firstly connecting, setting and measuring the contact resistance, disconnecting after the test is finished and then connecting a test wire of the mechanical characteristic to test the opening and closing time, the test process is complicated and low in efficiency, the two instruments are large in size and inconvenient to carry, meanwhile, the instrument cost is high, and the user cost is increased.
Aiming at the defects, the tester capable of measuring the contact resistance and the switching-on and switching-off time of the high-voltage switch is provided, the contact resistance and the switching-on and switching-off time can be tested by one-time wiring, the wiring is not required to be frequently changed, the optimized design is carried out simultaneously, the size of the tester is 20% larger than that of one instrument after the two instruments are combined into one, the weight is increased by 30%, the tester does not occupy space and is convenient to carry, and because the two instruments have a plurality of universal parts, such as a liquid crystal display screen, a micro printer, a switching power supply and the like, the shared devices can be saved and the users can be benefited after the two instruments are combined into one, and the win-win effect is realized.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a but not only measurable quantity high tension switchgear contact resistance but also measurable quantity its divide-shut brake time's tester possesses easy and simple to handle, occupation space is little, portable and the advantage of saving the cost, has solved the problem with two equipment measurement brought repeated wiring complex operation, occupation space is big, inconvenient carry and with high costs.
(II) technical scheme
For realize above-mentioned easy and simple to handle, occupation space is little, portable and practice thrift the purpose of cost, the utility model provides a following technical scheme: a tester capable of measuring contact resistance and switching-on and switching-off time of a high-voltage switch comprises a current source module, the output end of the current source module is electrically connected with a signal amplification module, the output end of the signal amplification module is connected with an AD conversion chip module by a signal, the output end of the AD conversion chip module is connected with a CPU module through a signal, the output end of the CPU module is connected with a printer through a signal, the output end of the CPU module is connected with an LCD display module by a signal, the output end of the CPU module is connected with a storage module by a signal, the output end of the CPU module is connected with a clock module by a signal, the input end of the CPU module is connected with a communication module by a signal, the input end signal connection of CPU module has the mouse, the input end signal connection of AD conversion chip module has the timing unit module, the input end signal connection of timing unit module has divide-shut brake signal module.
Preferably, the two ends of the current source module are connected with a standard resistor ROAnd the resistance R to be measuredXBy setting a standard resistance ROTo determine the current flowing into the resistor R to be measuredXThe current value of (1).
Preferably, the standard resistance ROThe two ends of the resistor R are electrically connected with the first signal amplification module, and the resistor R to be testedXThe two ends of the first signal amplifying module are electrically connected with the second signal amplifying module, and the signal amplifying module is used for filtering and amplifying voltage signals on the two resistors.
Preferably, be connected with relay K between timing unit module and the AD chip conversion module, before high-voltage switch contact resistance measurement accomplishes, relay K is in not closed state all the time, and after high-voltage switch contact resistance measurement accomplishes, relay K automatic closure carries out the divide-shut brake time test, makes two parts measure each other and does not influence.
Preferably, the switching-on/off signal module consists of a high-voltage circuit breaker, an auxiliary switch and a switching-on/off signal indicator lamp, and the high-voltage circuit breaker and the auxiliary switch are matched to jointly complete the switching-on/off operation.
Preferably, the current source module outputs a constant current, and the constant current enables the measured voltage signal to be more accurate.
(III) advantageous effects
Compared with the prior art, the utility model provides a but not only measurable quantity high tension switchgear contact resistance but also measurable quantity its divide-shut brake time's tester possesses following beneficial effect:
1. the first signal amplification module acquires a standard resistor R through the current source module outputting constant currentOVoltage signal U acrossOThe second amplification module collects the resistor R to be testedXVoltage signal U acrossXThe two voltage signals are sent to an AD chip conversion module after being filtered and amplified by a signal amplification module, finally sent to a CPU module, and finally subjected to calculation processing by the CPU module to obtain a resistor R to be detectedXThe effect of measuring the contact resistance of the high-voltage switch is achieved.
2. The high-voltage switch coil is powered through an instrument, the timing unit module is started, the relay is closed, the timing unit module is communicated with the AD chip conversion module in a signal mode, timing of the timing unit module is completed after the high-voltage switch is disconnected (or closed), and the effect of measuring the opening and closing time of the high-voltage switch is achieved.
Drawings
Fig. 1 is a flow chart of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a tester capable of measuring both contact resistance and switching-on/off time of a high voltage switch includes a current source module, wherein the current source module outputs a constant current, the constant current makes a measured voltage signal more accurate, and two ends of the current source module are connected to a standard resistor ROAnd the resistance R to be measuredXBy setting a standard resistance ROTo determine the current flowing into the resistor R to be measuredXThe value of the standard resistance ROThe two ends of the resistor R are electrically connected with the first signal amplification module, and the resistor R to be testedXThe two ends of the timing unit module are electrically connected with a second signal amplification module, the signal amplification module is used for filtering and amplifying voltage signals on two resistors, the output end of the current source module is electrically connected with the signal amplification module, the output end of the signal amplification module is connected with an AD conversion chip module in a signal mode, a relay K is electrically connected between the timing unit module and the AD conversion module, the relay K is always in an unclosed state before the measurement of the contact resistance of the high-voltage switch is completed, the relay K is automatically closed after the measurement of the contact resistance of the high-voltage switch is completed, the opening and closing time test is performed, so that the two parts of measurement are not influenced mutually, the output end of the AD conversion chip module is connected with a CPU module, the output end of the right side of the top end of the CPU module is connected with a printer in a signal mode, and the output end of the left side of the top end of the CPU module is connected with an LCD display module in a signal mode, the device comprises a CPU module, a clock module, a communication module, a mouse, an AD conversion chip module, a switching-on/off signal module, an auxiliary switch, a switching-on/off signal indicator lamp and a high-voltage circuit breaker, wherein the right top output end of the CPU module is in signal connection with a storage module, the right bottom output end of the CPU module is in signal connection with the clock module, the bottom right side output end of the CPU module is in signal connection with the communication module, the bottom left side input end of the CPU module is in signal connection with the mouse, the input end of the AD conversion chip module is in signal connection with the timing unit module, the input end of the timing unit module is in signal connection with the switching-on/off signal module, the switching-on/off signal module is composed of the high-voltage circuit breaker, the auxiliary switch and the switching-on/off signal indicator lamp, and the switching-on/off operation is completed jointly by the cooperation of the high-voltage circuit breaker and the auxiliary switch.
The working principle is that the current source outputs constant current to flow through the standard resistor R0And a resistance R to be measuredXSampling a standard resistance R0Voltage signal U on0Filtering, amplifying, AD converting to digital value, calculating current value I, formula (1), and sampling resistor R to be measuredXVoltage signal U onXAfter filtering and multistage amplification, the signals are sent to AD to be converted into digital quantity, and the resistance value R is calculated by a formula (2)X，
After the contact resistance is measured, the instrument automatically cuts in and measures the opening and closing time of the high-voltage switch, at the moment, the instrument sends a point to the high-voltage switch coil, meanwhile, the timing unit is started, the relay K is closed, a signal is sent to the AD chip and finally sent to the single chip microcomputer, when the high-voltage switch is opened (or closed), the timing unit completes timing, and the opening and closing time is displayed on the liquid crystal display.
In summary, the current source module outputs a constant current, and the first signal amplifying module collects the standard resistor ROVoltage signal U acrossOThe second amplification module collects the resistor R to be testedXVoltage signal U acrossXThe two voltage signals are sent to an AD chip conversion module after being filtered and amplified by a signal amplification module, finally sent to a CPU module, and finally subjected to calculation processing by the CPU module to obtain a resistor R to be detectedXThe value of (2) reaches the effect of measuring the contact resistance of the high-voltage switch, the high-voltage switch coil is powered on through an instrument, the timing unit module is started, the relay is closed, the timing unit module is in signal communication with the AD chip conversion module, and the timing unit module finishes timing after the high-voltage switch is disconnected (or closed), so that the effect of measuring the opening and closing time of the high-voltage switch is achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
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 both can measure high tension switchgear contact resistance and can measure tester of its divide-shut brake time again, includes current source module, its characterized in that: the output electricity of current source module is connected with the signal amplification module, the output end signal connection of signal amplification module has AD conversion chip module, the output end signal connection of AD conversion chip module has the CPU module, the top right side output end signal connection of CPU module has the printer, the top left side output end signal connection of CPU module has the LCD display module, the right side top output end signal connection of CPU module has storage module, the right side bottom output end signal connection of CPU module has clock module, the bottom right side output end signal connection of CPU module has communication module, the bottom left side input end signal connection of CPU module has mouse, the input end signal connection of AD conversion chip module has timing unit module, the input signal connection of timing unit module has divide-shut brake signal module.
2. The tester of claim 1, which can measure both contact resistance and switching-on/off time of the high-voltage switch, wherein: the two ends of the current source module are connected with a standard resistor ROAnd the resistance R to be measuredX。
3. The device of claim 2, capable of measuring contact resistance and switching on/off of high-voltage switchThe tester of time, its characterized in that: the standard resistor ROThe two ends of the resistor R are electrically connected with the first signal amplification module, and the resistor R to be testedXAre electrically connected with the second signal amplification module.
4. The tester of claim 1, which can measure both contact resistance and switching-on/off time of the high-voltage switch, wherein: and a relay is electrically connected between the timing unit module and the AD chip conversion module.
5. The tester of claim 1, which can measure both contact resistance and switching-on/off time of the high-voltage switch, wherein: and the opening and closing signal module consists of a high-voltage circuit breaker, an auxiliary switch and an opening and closing signal indicator lamp.
6. The tester of claim 1, which can measure both contact resistance and switching-on/off time of the high-voltage switch, wherein: the current source module outputs current which is constant current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121224009.2U CN215263720U (en) | 2021-06-03 | 2021-06-03 | Tester capable of measuring contact resistance and opening and closing time of high-voltage switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121224009.2U CN215263720U (en) | 2021-06-03 | 2021-06-03 | Tester capable of measuring contact resistance and opening and closing time of high-voltage switch |
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| Publication Number | Publication Date |
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| CN215263720U true CN215263720U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121224009.2U Active CN215263720U (en) | 2021-06-03 | 2021-06-03 | Tester capable of measuring contact resistance and opening and closing time of high-voltage switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825571A (en) * | 2022-12-28 | 2023-03-21 | 西安铁路信号有限责任公司 | Detection circuit for contact resistance of full-electronic onboard electronic relay |
| CN116593881A (en) * | 2023-04-25 | 2023-08-15 | 国网河北省电力有限公司石家庄供电分公司 | A three-phase high-voltage contact resistance and switching characteristics testing device and method |
-
2021
- 2021-06-03 CN CN202121224009.2U patent/CN215263720U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825571A (en) * | 2022-12-28 | 2023-03-21 | 西安铁路信号有限责任公司 | Detection circuit for contact resistance of full-electronic onboard electronic relay |
| CN116593881A (en) * | 2023-04-25 | 2023-08-15 | 国网河北省电力有限公司石家庄供电分公司 | A three-phase high-voltage contact resistance and switching characteristics testing device and method |
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