CN207396604U - A kind of high-voltage switch gear dynamic contact resistance measuring device - Google Patents

A kind of high-voltage switch gear dynamic contact resistance measuring device Download PDF

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Publication number
CN207396604U
CN207396604U CN201720855271.4U CN201720855271U CN207396604U CN 207396604 U CN207396604 U CN 207396604U CN 201720855271 U CN201720855271 U CN 201720855271U CN 207396604 U CN207396604 U CN 207396604U
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China
Prior art keywords
voltage switch
switch gear
contact resistance
resistance measuring
dynamic contact
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Application number
CN201720855271.4U
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Chinese (zh)
Inventor
孟泽文
陈丽安
游民
游一民
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Xiamen University of Technology
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Xiamen University of Technology
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Abstract

The utility model discloses a kind of high-voltage switch gear dynamic contact resistance measuring devices, its DC power supply accumulator group forms measurement major loop with the moving contact in high-voltage switch gear and static contact, the current measurement coil tandem of current clamp is into measurement major loop, and signal output part connection oscillograph, angular displacement sensor is mounted on the transmission shaft of movable contact of high-voltage switch, the similary signal connection oscillograph of output terminal.The utility model can measure high-voltage switch contact stroke curve and dynamic contact resistance resistance value simultaneously, relatively comprehensive status assessment is carried out to high-voltage switch gear by comparing two groups of data, due to avoiding the dismounting to dynamic/static contact, status assessment process can save a large amount of manpower and materials, while improve the reliability and stability of system operation.

Description

A kind of high-voltage switch gear dynamic contact resistance measuring device
Technical field
The utility model is related to high-voltage switch gear technical fields, and in particular to a kind of high-voltage switch gear dynamic contact resistance measurement dress It puts.
Background technology
With the raising of power equipment operational reliability requirement, repair based on condition of component is gradually instead of trouble hunting and periodically inspection It repaiies, status assessment is increasingly becoming the important means of safeguards system safe and stable operation.And in electric system, serve as critical function High-voltage switch gear be often the equipment for being most difficult to ensure reliability, the particularly status assessment of its arc-chutes is all one all the time Problem, once breaking down, loss is inestimable.Therefore, it is necessary to Scientific evaluation and detection are carried out to the indoor state of arc extinguishing, On the other hand, the mechanical property of high-voltage switch gear is similarly worth us to pay close attention to, the important object that stroke curve is symbolized Meaning is managed for judging that the state quality of high-voltage switch gear has important reference value.Based on above-mentioned status assessment demand, having must Design it is a can be on the premise of movable contact of high-voltage switch, static contact not being disassembled detection, high-voltage switch contact The device that measures of dynamic contact resistance.
Utility model content
It, can be accurate the technical problem to be solved by the utility model is to provide one kind in the case where not disassembling high-voltage switch gear The measuring device of contact resistance situation of change when really measurement high-voltage switch gear divide-shut brake acts, device can be to high-voltage switch gear arc extinguishing The abundant assessment of room state provides mass efficient support data.
In order to solve the above technical problems, the technical solution of the utility model is:
A kind of high-voltage switch gear dynamic contact resistance measuring device, including DC power supply accumulator group, current clamp, angular displacement Sensor and oscillograph, DC power supply accumulator group form measurement major loop, electricity with the moving contact in high-voltage switch gear and static contact The current measurement coil tandem of pincers is flowed into measurement major loop, the signal output end signal connection oscillograph of current clamp, angular displacement Sensor is mounted on the transmission shaft of movable contact of high-voltage switch, the similary signal connection oscillograph of output terminal of angular displacement sensor.
Preferably, for filtering environmental clutter to improve the stability of data transmission, current clamp, angular displacement sensor and oscillography A filter circuit is connected between device respectively.
Preferably, current measurement coil uses Rogowski coil, the output signal of current clamp is voltage signal, and measurement ratio is 100A/V。
Preferably, oscillograph includes at least, external trigger channel, angular displacement sensor signal connect external trigger channel all the way.
Preferably, DC power supply accumulator group is the voltage stabilizing lead-acid batteries of exportable constant 10V voltages.
Preferably, the dual channel oscilloscope that it is 1000Hz that oscillograph, which is sample frequency, meets multiple signals input.
Preferably, filter circuit is low-pass filter, LPF Cutoff frequency modulation is adjustable, can be changed according to site requirement Its filtering performance, and then realize the acquisition of more accurate and steady and audible signal.
After using the above program, the utility model can measure high-voltage switch contact stroke curve and dynamic contact resistance simultaneously Resistance value carries out high-voltage switch gear relatively comprehensive status assessment by comparing two groups of data, dynamic/static contact is torn open due to avoiding It unloads, status assessment process can save a large amount of manpower and materials, while improve the reliability and stability of system operation.
Description of the drawings
Fig. 1 is the utility model structure diagram.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
Revealed the utility model is a kind of high-voltage switch gear dynamic contact resistance measuring device, as shown in Figure 1, being this reality With new preferred embodiment, which includes DC power supply accumulator group 1, current clamp 2, angular displacement sensor 3 and oscillograph 4, wherein, DC power supply accumulator group 1 forms measurement major loop, current clamp 2 with the moving contact 5 in high-voltage switch gear and static contact 6 Current measurement coil tandem to measurement major loop in, the signal output part output voltage signal of current clamp 2, and signal connection show Ripple device 4, angular displacement sensor 3 are mounted on the transmission shaft of movable contact of high-voltage switch 5, and the output terminal of angular displacement sensor 3 is similary Signal connects oscillograph 4.
Specifically, DC power supply accumulator group 1 is mainly used for providing DC power supply for measurement major loop, can select can be defeated Go out the voltage stabilizing lead-acid batteries of constant 10V voltages, battery pack maximum output current is disregarded up to 1500A, battery pack internal resistance.It surveys The current measurement coil of the current clamp 2 concatenated in amount major loop is using Rogowski coil, and measurement is than being 100A/V, to ensure output letter It is clear number to stablize, and effectively eliminates ambient enviroment clutter and the interference of other electrical equipments, can be between current clamp 2 and oscillograph 4 Connect a filter circuit 7.Likewise, a filter circuit 7 can be connected between angular displacement sensor 3 and oscillograph 4 for filtering out Environment clutter is to improve the stability of data transmission.It is independently-powered that the progress of 3V dry cells may be employed in angular displacement sensor 3.Device The filter circuit 7 of middle use can select low-pass filter, and cut-off frequency modulation is adjustable, can change its filtering property according to site requirement Can, and then realize the acquisition of more accurate and steady and audible signal.
To realize multi signal typing, the dual channel oscilloscope that sample frequency is 1000Hz can be used in oscillograph, preferably Running parameter can select:Current signal minimum range 5mA, maximum range 50A, voltage signal minimum range 10mV, maximum Journey 100V, equipment have Trigger Function and store function.Oscillograph 4 is also required comprising at least external trigger channel all the way, angular displacement Sensor 3 is that signal connects the external trigger channel.
It during work, can be obtained by current clamp 2 by measuring the curent change in major loop, and then obtain tested height indirectly Compress switch dynamic contact resistance change in resistance curve, and with the generation that moving contact divide-shut brake acts, angular displacement sensor 3 exports Relevant voltage signal obtains contact action stroke curve, and measured waveform can be directly acquired using dual channel oscilloscope.
The above descriptions are merely preferred embodiments of the present invention, and not the technical scope of the utility model is made Any restrictions, therefore the variation or modification done in every case according to the claim and specification of the utility model, should all belong to this practicality Within the scope of new patent is covered.

Claims (7)

1. a kind of high-voltage switch gear dynamic contact resistance measuring device, it is characterised in that:Including DC power supply accumulator group, electric current Pincers, angular displacement sensor and oscillograph, the DC power supply accumulator group are formed with the moving contact in high-voltage switch gear and static contact Major loop is measured, for the current measurement coil tandem of the current clamp into the measurement major loop, the signal of the current clamp is defeated Go out end signal and connect the oscillograph, the angular displacement sensor is mounted on the transmission shaft of movable contact of high-voltage switch, the angle The similary signal of output terminal of displacement sensor connects the oscillograph.
2. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 1, it is characterised in that:The electric current A filter circuit is connected respectively between pincers, angular displacement sensor and the oscillograph.
3. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 1, it is characterised in that:The electric current Measuring coil uses Rogowski coil, and the output signal of the current clamp is voltage signal, and measurement is than being 100A/V.
4. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 1, it is characterised in that:The oscillography Device is comprising at least external trigger channel, the angular displacement sensor signal connect the external trigger channel all the way.
5. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 1, it is characterised in that:The direct current Battery of electric power group is the voltage stabilizing lead-acid batteries of exportable constant 10V voltages.
6. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 1, it is characterised in that:The oscillography Device is the dual channel oscilloscope that sample frequency is 1000Hz.
7. a kind of high-voltage switch gear dynamic contact resistance measuring device according to claim 2, it is characterised in that:The filtering Circuit is low-pass filter.
CN201720855271.4U 2017-07-14 2017-07-14 A kind of high-voltage switch gear dynamic contact resistance measuring device Active CN207396604U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720855271.4U CN207396604U (en) 2017-07-14 2017-07-14 A kind of high-voltage switch gear dynamic contact resistance measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720855271.4U CN207396604U (en) 2017-07-14 2017-07-14 A kind of high-voltage switch gear dynamic contact resistance measuring device

Publications (1)

Publication Number Publication Date
CN207396604U true CN207396604U (en) 2018-05-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109683020A (en) * 2018-12-24 2019-04-26 广东电网有限责任公司 The device and method for calculating aerial earth wire and preformed armor rods contact port contact resistance
CN110907811A (en) * 2019-11-18 2020-03-24 广东欧文特电气有限公司 Medium-voltage switch cabinet contact stroke measuring method
CN113447719A (en) * 2021-07-21 2021-09-28 国网河北省电力有限公司检修分公司 Detection device for contact surface resistance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109683020A (en) * 2018-12-24 2019-04-26 广东电网有限责任公司 The device and method for calculating aerial earth wire and preformed armor rods contact port contact resistance
CN110907811A (en) * 2019-11-18 2020-03-24 广东欧文特电气有限公司 Medium-voltage switch cabinet contact stroke measuring method
CN113447719A (en) * 2021-07-21 2021-09-28 国网河北省电力有限公司检修分公司 Detection device for contact surface resistance

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