CN104820161A - Multi-tap current transformer secondary wiring detection device - Google Patents
Multi-tap current transformer secondary wiring detection device Download PDFInfo
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- CN104820161A CN104820161A CN201510262831.0A CN201510262831A CN104820161A CN 104820161 A CN104820161 A CN 104820161A CN 201510262831 A CN201510262831 A CN 201510262831A CN 104820161 A CN104820161 A CN 104820161A
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Abstract
The embodiment of the invention provides a multi-tap current transformer secondary wiring detection device, which comprises a power supply end, a voltage regulator, an isolation transformer, a first current meter and a second current meter, wherein the power supply end, the voltage regulator and the isolation transformer are sequentially connected; the isolation transformer comprises two output ends, when secondary wiring of a to-be-detected multi-tap current transformer is detected, the isolation transformer is connected with any two taps with a non-maximal transformer ratio in the to-be-detected multi-tap current transformer, and current is inputted between the two taps connected; the first current meter is connected with any output end of the isolation transformer for detecting an output current value of the isolation transformer; and the second current meter is used for being connected with two taps with the maximal transformer ratio in the to-be-detected multi-tap current transformer when secondary wiring of the to-be-detected multi-tap current transformer is detected and detecting a current value between the taps with the maximal transformer ratio. The device has higher safety, and the operation is simpler, quicker, and more convenient.
Description
Technical field
The present invention relates to field of power detection, particularly relate to a kind of many tap current mutual inductor secondary connection pick-up unit.
Background technology
In electric system, the secondary circuit of current transformer is the important component part of protection, observing and controlling and automation equipment, is the key factor guaranteeing protective device correct operation power system security reliability service.Current Transformer Secondary open circuit or wiring incorrect; to cause unit exception or protective device can not correct operation; cause serious harm to the safe operation of electric system, therefore, the inspection of secondary loop of mutual inductor wiring correctness is an important process of relay protection specialty.
At present, the common method of current transformer connection inspection mainly contain once through-flow, secondary is through-flow and Current Transformer Secondary cable is checked.Because becoming casing current transformer is arranged on rising seat usually, the position of its secondary cable terminal box is high, needs to use rising car to climb up transformer when disconnecting secondary cable or through-flow test, and the dismounting of secondary cable checks that difficulty is high, have the danger of falling from high altitude in operating process, namely security is lower.Meanwhile, because the once through-flow inspection of many tap current mutual inductor, need once to overhaul and high-potting personnel cooperation, and after the installation of sleeve of main transformer current transformer, the large reactance due to main transformer winding is difficult to realize once logical big current inspection secondary current loop; Multi-point and wide-ranging during inspection that secondary is through-flow, need multiple secondary maintainer to coordinate; Many tap current mutual inductor, especially the tap of sleeve of main transformer current transformer is many, and the dismounting of secondary cable and the reason such as wiring workload is larger, use these conventional methods checking current transformer connections, all need many people to coordinate, comparatively waste time and energy.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of many tap current mutual inductor secondary connection pick-up unit, lower and all need many people to coordinate to solve security in prior art, the problem comparatively wasted time and energy.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of many tap current mutual inductor secondary connection pick-up unit, comprising: power end, pressure regulator, isolating transformer, the first reometer and the second reometer, described power end, pressure regulator are connected successively with isolating transformer; Wherein,
Described isolating transformer comprises two output terminals, for when detecting many tap current mutual inductor secondary connection to be measured, be connected with the off-peak tap of any two no-load voltage ratios in described many tap current mutual inductor to be measured, to input current between coupled two taps;
Described first reometer, is connected with arbitrary output terminal of described isolating transformer, for detecting the output current value of described isolating transformer;
Described second reometer, for when detecting many tap current mutual inductor secondary connection to be measured, two taps maximum with no-load voltage ratio in described many tap current mutual inductor to be measured are connected, and detect the current value between the maximum tap of described no-load voltage ratio.
Wherein, described many tap current mutual inductor secondary connection pick-up unit also comprises: impedance meter, described impedance meter is connected with two output terminals of described isolating transformer, for when detecting many tap current mutual inductor secondary connection to be measured, detect the secondary impedance value between two taps being connected with described isolating transformer.
Wherein, described many tap current mutual inductor secondary connection pick-up unit also comprises: pincerlike meter, for detecting the current value between tap that in described many tap current mutual inductor to be measured, no-load voltage ratio is maximum.
Wherein, described many tap current mutual inductor secondary connection pick-up unit also comprises: casing, for holding described power end, pressure regulator, isolating transformer, the first reometer and the second reometer.
Wherein, described many tap current mutual inductor secondary connection pick-up unit also comprises: panel, and described panel comprises the first viewing area and the second viewing area;
Described first viewing area, for exporting the output current of described isolating transformer, and shows the numerical value of the first reometer;
Described second viewing area, for accessing the electric current between two maximum taps of no-load voltage ratio in many tap current mutual inductor to be measured, and shows the numerical value of the second reometer.
Wherein, described first viewing area comprises: the first display screen and two input terminals; Wherein,
Described first display screen is connected with described first reometer, for showing the numerical value of described first reometer;
Described two input terminals, are connected with two output terminals of described isolating transformer, respectively for exporting the output current of described isolating transformer.
Wherein, described first viewing area comprises: second display screen and two lead-out terminals; Wherein,
Described second display screen is connected with described second reometer, for showing the numerical value of described second reometer;
Described two lead-out terminals, are connected with the two ends of described second reometer respectively, for the two ends by described second reometer of electric current access between two maximum for no-load voltage ratio in many tap current mutual inductor to be measured taps.
Wherein, described panel also comprises: the 3rd viewing area, and described 3rd viewing area comprises the 3rd display screen, and described 3rd display screen is connected with described impedance meter, for showing the numerical value of described impedance meter.
Wherein, described panel also comprises: power supply area, and described power supply area comprises alternating current input socket and power switch, after described power switch is closed, provides alternating current by described input AC electrical socket to power end.
Wherein, described many tap current mutual inductor secondary connection pick-up unit also comprises: earth terminal;
Described panel also comprises: ground terminal, is connected with described earth terminal, for making earth terminal ground connection by ground wire.
Based on technique scheme, the embodiment of the present invention provides a kind of many tap current mutual inductor secondary connection pick-up unit, comprise: power end, pressure regulator, isolating transformer, the first reometer and the second reometer, described power end, pressure regulator are connected successively with isolating transformer; Wherein, described isolating transformer comprises two output terminals, for when detecting many tap current mutual inductor secondary connection to be measured, be connected with the off-peak tap of any two no-load voltage ratios in described many tap current mutual inductor to be measured, to input current between coupled two taps; Described first reometer, is connected with arbitrary output terminal of described isolating transformer, for detecting the output current value of described isolating transformer; Described second reometer, for when detecting many tap current mutual inductor secondary connection to be measured, two taps maximum with no-load voltage ratio in described many tap current mutual inductor to be measured are connected, and detect the current value between the maximum tap of described no-load voltage ratio.When needs detect many tap current mutual inductor secondary connection to be measured, the off-peak tap of any two no-load voltage ratios in many tap current mutual inductor to be measured is connected with the output terminal of isolating transformer, input current is shown in these two taps to this many tap current mutual inductor to be measured, and utilize the output current value of the first reometer to this isolating transformer to detect, namely the current value of input isolating transformer is detected, and use the second reometer to detect the electric current between maximum two taps of no-load voltage ratio in many tap current mutual inductor to be measured, because the no-load voltage ratio between each tap of many tap current mutual inductor to be measured is known, therefore, ratio between the current value that the current value that can be recorded by judgement first reometer and the second reometer are recorded, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, judge that whether the secondary connection of many tap current mutual inductor to be measured is correct.The tap of many tap current mutual inductor to be measured and the embodiment of the present invention is only needed to provide many tap current mutual inductor to be connected, and read out the numeral of the first reometer and the second reometer in this many tap current mutual inductor, judge the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, just can detect the secondary connection of many tap current mutual inductor, do not need staff's work high above the ground, many people are not needed to participate in implementing yet, there is higher security, and implement more simple and fast.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of many tap current mutual inductor secondary connection pick-up unit that Fig. 1 provides for the embodiment of the present invention;
Another connection diagram of many tap current mutual inductor secondary connection pick-up unit that Fig. 2 provides for the embodiment of the present invention;
The structural representation of panel in many tap current mutual inductor secondary connection pick-up unit that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The structural representation of many tap current mutual inductor secondary connection pick-up unit that Fig. 1 provides for the embodiment of the present invention, the tap of many tap current mutual inductor to be measured and the embodiment of the present invention is only needed to provide many tap current mutual inductor to be connected, and read out the numeral of the first reometer and the second reometer in this many tap current mutual inductor, judge the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, just can detect the secondary connection of many tap current mutual inductor, do not need staff's work high above the ground, many people are not needed to participate in implementing yet, there is higher security, and implement more simple and fast, with reference to Fig. 1, this many tap current mutual inductor secondary connection pick-up unit can comprise: power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500.
Power end 100, pressure regulator 200 are connected successively with isolating transformer 300.Be connected in series by power end 100 and pressure regulator 200 and isolating transformer 300, the power supply signal inputted from power end 100 can be powered to pressure regulator 200 and isolating transformer 300 respectively.
Optionally, power end 100 can input voltage be the electric main of 220 volts.
Pressure regulator 200, for regulating working the power information received, output voltage and the output current of isolating transformer 300 can be controlled by controlling pressure regulator 200, isolating transformer 300 is then in pressure regulator 100 out-put supply information, the power information that current value is greater than predetermined value is isolated, and keeps the stable of isolating transformer 300 output current.
Isolating transformer 300 comprises two output terminals, when detecting many tap current mutual inductor secondary connection to be measured, the off-peak tap of any two no-load voltage ratios in two of isolating transformer 300 output terminals respectively many tap current mutual inductor to be measured with this is connected, to input current between coupled two taps.Such as, if many tap current mutual inductor to be measured comprises 5 taps, wherein, between first tap and second tap, between the 3rd tap, between the 4th tap and the no-load voltage ratio of the 5th tap be respectively 200/5, 300/5, 400/5 and 600/5, so, in this many tap current mutual inductor to be measured first to take out and between the 5th tap no-load voltage ratio maximum, the off-peak tap of any two no-load voltage ratios in two of isolating transformer 300 output terminals respectively many tap current mutual inductor to be measured with this is connected, only need, two of isolating transformer 300 output terminals are not taken out with first respectively and to be connected with the 5th tap.
First reometer 400, be connected with arbitrary output terminal of isolating transformer 300, the current value of isolating transformer 300 output current is detected by the first reometer 400, because two output terminals of isolating transformer 300 are connected with the off-peak tap of any two no-load voltage ratios in many tap current mutual inductor to be measured respectively, therefore, alternatively, by the first reometer 400, the current value of input isolating transformer is detected.
When detecting many tap current mutual inductor secondary connection to be measured, two taps that the second reometer 500 is maximum with no-load voltage ratio in many tap current mutual inductor to be measured are connected, and detect the current value between the maximum tap of this no-load voltage ratio.Such as, if many tap current mutual inductor to be measured comprises 5 taps, between first tap and second tap, between the 3rd tap, between the 4th tap and the no-load voltage ratio of the 5th tap be respectively 200/5,300/5,400/5 and 600/5, so, in this many tap current mutual inductor to be measured first to take out and between the 5th tap no-load voltage ratio maximum, two taps that second reometer 500 is maximum with no-load voltage ratio in many tap current mutual inductor to be measured are connected, and take out by the second reometer 500 and to be connected with the 5th tap with first.
Because the no-load voltage ratio between each tap of many tap current mutual inductor to be measured is known, therefore, can determine that the first reometer 400 and the second reometer are detect those two taps in many tap current mutual inductor to be measured respectively, and after determining the no-load voltage ratio between the tap that is detected, by judging the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, judge that whether the secondary connection of many tap current mutual inductor to be measured is correct.
Wherein, it should be noted that, judge the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer.Not the ratio between the current value that records of the current value that records of needs first reometer and the second reometer, numerically complete equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, just judge the ratio between the current value that the current value that records of the first reometer and the second reometer record, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer.Due to reasons such as errors, ratio between the current value that first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer can be equal in error allowed band.
Such as, if many tap current mutual inductor to be measured comprises 5 taps, between first tap and second tap, between the 3rd tap, between the 4th tap and the no-load voltage ratio of the 5th tap be respectively 200/5, 300/5, 400/5 and 600/5, the output terminal of isolating transformer 300 is connected with second tap with first tap respectively, the output voltage of isolating transformer 300 is regulated to be 3A by pressure regulator 200, namely the reading of the first reometer 400 is 3A, the electric current inputted between many tap current mutual inductor to be measured first tap and second tap is 3A, the error that setting allows is 0.1A.So, because the no-load voltage ratio between first tap and the 5th tap, the i.e. maximum no-load voltage ratio of this many tap current mutual inductor to be measured, and the ratio between the no-load voltage ratio between first tap and second tap is (600/5)/(200/5)=3, so, only need to read out the second electric current numerical value just, by judging whether the ratio between the current value that the first reometer records and the current value that the second reometer records is 3, judge that whether this many tap current mutual inductor secondary connection to be measured is correct.If whether the ratio between the current value that the first reometer records and the current value that the second reometer records is 3, i.e. current value=3 that record of 3/ second reometer, the numerical value of the second reometer namely read out is between 1A ± 0.1A, so, just think, this many tap current mutual inductor secondary connection to be measured is correct; Otherwise if the numerical value of the second reometer read out is no longer between 1A ± 0.1A, then thinking, there is mistake in this many tap current mutual inductor secondary connection to be measured.
Based on technique scheme, the embodiment of the present invention provides a kind of many tap current mutual inductor secondary connection pick-up unit, comprise: power end, pressure regulator, isolating transformer, the first reometer and the second reometer, described power end, pressure regulator are connected successively with isolating transformer; Wherein, described isolating transformer comprises two output terminals, for when detecting many tap current mutual inductor secondary connection to be measured, be connected with the off-peak tap of any two no-load voltage ratios in described many tap current mutual inductor to be measured, to input current between coupled two taps; Described first reometer, is connected with arbitrary output terminal of described isolating transformer, for detecting the output current value of described isolating transformer; Described second reometer, for when detecting many tap current mutual inductor secondary connection to be measured, two taps maximum with no-load voltage ratio in described many tap current mutual inductor to be measured are connected, and detect the current value between the maximum tap of described no-load voltage ratio.When needs detect many tap current mutual inductor secondary connection to be measured, the off-peak tap of any two no-load voltage ratios in many tap current mutual inductor to be measured is connected with the output terminal of isolating transformer, input current is shown in these two taps to this many tap current mutual inductor to be measured, and utilize the output current value of the first reometer to this isolating transformer to detect, namely the current value of input isolating transformer is detected, and use the second reometer to detect the electric current between maximum two taps of no-load voltage ratio in many tap current mutual inductor to be measured, because the no-load voltage ratio between each tap of many tap current mutual inductor to be measured is known, therefore, ratio between the current value that the current value that can be recorded by judgement first reometer and the second reometer are recorded, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, judge that whether the secondary connection of many tap current mutual inductor to be measured is correct.The tap of many tap current mutual inductor to be measured and the embodiment of the present invention is only needed to provide many tap current mutual inductor to be connected, and read out the numeral of the first reometer and the second reometer in this many tap current mutual inductor, judge the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, just can detect the secondary connection of many tap current mutual inductor, do not need staff's work high above the ground, many people are not needed to participate in implementing yet, there is higher security, and implement more simple and fast.
Optionally, Fig. 2 shows another connection diagram of many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, and with reference to Fig. 2, this many tap current mutual inductor secondary connection pick-up unit can also comprise: impedance meter 600.
Impedance meter 600 is connected with two output terminals of isolating transformer 300; when detecting many tap current mutual inductor secondary connection to be measured; impedance meter 600 can detect the secondary impedance value between two taps being connected with isolating transformer 300, also can carry out the through-flow testing impedance of the secondary of relay protection specialty by impedance meter 600.
Optionally, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides can also comprise pincerlike meter, after many tap current mutual inductor to be measured has been accessed many tap current mutual inductor secondary connection pick-up unit, the measurement of electric current can also be carried out to this many tap current mutual inductor to be measured by pincerlike meter, without the need to the annexation between this many tap current mutual inductor to be measured and many tap current mutual inductor secondary connection pick-up unit is first cut off, for the measurement of many tap current transformer current to be measured is provided convenience.
Meanwhile, between each terminal that can also find many tap current mutual inductor to be measured by pincerlike meter, whether there is the situation of short circuit, avoid the generation causing mishap because of many tap current mutual inductor Secondary Winding tap short circuit to be measured or open circuit.
Optionally, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, can also comprise: casing.
Casing is for holding power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500.
When many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides also comprises impedance meter 600, also impedance meter 600 can be placed in casing.
Power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 are contained in casing, power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 is made to be fixed in a casing, be convenient to centralized operation, and saving space, be convenient to store and carrying.
Optionally, power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 can be placed in the inside of casing, because casing has shell, shell has protection and barrier effect, therefore, so can must protect power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 well; And make to be positioned at the power end 100 of casing, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 and be all not easy to lose, protect the integrality of many tap current mutual inductor secondary connection pick-up unit.
Optionally, power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 can be placed in the surface of casing, power end 100, pressure regulator 200, isolating transformer 300, first reometer 400 and the second reometer 500 are placed in the surface of casing, many tap current mutual inductor secondary connection pick-up unit can be made can be used for carrying out the analog detection of capacitive apparatus attribute of performance detection at any time.
Optionally, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides can also comprise: panel 700, realize the detection of many tap current mutual inductor secondary connection by the operation of equipment on counter plate 700, make operating process simpler, convenient.
Optionally, Fig. 3 shows the structural representation of panel 700 in many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, and with reference to Fig. 2, this panel 700 can comprise: the first viewing area 710 and the second viewing area 720, wherein,
First viewing area 710, for the output current of output isolation transformer 300, and shows the numerical value of the first reometer 400.
Optionally, the first viewing area 710 can comprise: the first display screen and two input terminals.
Wherein, the first display screen is connected with the first reometer 400, for showing the numerical value of the first reometer 400.
Two input terminals, are connected with two output terminals of isolating transformer 300 respectively, for exporting the output current of described isolating transformer 300.
Second viewing area 720, for accessing the electric current between two maximum taps of no-load voltage ratio in many tap current mutual inductor to be measured, and shows the numerical value of the second reometer.
Optionally, the second viewing area 720 can comprise: second display screen and two lead-out terminals.
Wherein, second display screen is connected 500 with the second reometer, for showing the numerical value of the second reometer 500.
Two lead-out terminals, are connected with the two ends of the second reometer 500 respectively, for the electric current between two maximum for no-load voltage ratio in many tap current mutual inductor to be measured taps being accessed the two ends of the second reometer 500.
Optionally, with reference to Fig. 3, the structural representation of panel 700 in many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, in this device, panel 700 can also comprise: the 3rd viewing area 730.
When many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides comprises impedance meter 600, can arranging the 3rd viewing area 730 on panel 700, for showing the numerical value of impedance meter 600.
Optionally, the 3rd viewing area 730 can comprise the 3rd display screen, and the 3rd display screen is connected with impedance meter 600, for showing the numerical value of impedance meter 600.
When many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides comprises pincerlike meter, a pincerlike meter jack 740 can be set on panel 700, after pincerlike meter being inserted pincerlike meter jack 740, can current value between two taps that pincerlike meter 740 gets on to read maximum no-load voltage ratio in many tap current mutual inductor to be measured.
Optionally, with reference to Fig. 3, in many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, panel 700 can also comprise: power supply area 750,
Power supply area 750 comprises alternating current input socket and voltage switch, alternating current input socket is connected with power end 100, after voltage switch is closed, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides is started working, alternating current can be provided to power end 100 by alternating current input socket, when voltage switch non-closed, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides quits work.
Optionally, alternating current input socket can access the electric main of 220 volts.
Optionally, alternating current input socket can be Three-hole socket.
Optionally, many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides can also comprise: earth terminal.
Accordingly, optionally, with reference to Fig. 3, in many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, panel 700 can also comprise: ground terminal 760, be connected with earth terminal in many tap current mutual inductor secondary connection pick-up unit, for making earth terminal ground connection by ground wire, in case leak-stopping electricity waits the generation of mishap.
Many tap current mutual inductor secondary connection pick-up unit that the embodiment of the present invention provides, the tap of many tap current mutual inductor to be measured and the embodiment of the present invention is only needed to provide many tap current mutual inductor to be connected, and read out the numeral of the first reometer and the second reometer in this many tap current mutual inductor, judge the ratio between the current value that the first reometer records and the current value that the second reometer records, whether equal with the ratio of the no-load voltage ratio between the maximum no-load voltage ratio of many tap current mutual inductor to be measured and the tap that is connected with isolating transformer, just can detect the secondary connection of many tap current mutual inductor, do not need staff's work high above the ground, many people are not needed to participate in implementing yet, there is higher security, and implement more simple and fast.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the mutual inductor secondary connection of tap current a more than pick-up unit, is characterized in that, comprising: power end, pressure regulator, isolating transformer, the first reometer and the second reometer, and described power end, pressure regulator are connected successively with isolating transformer; Wherein,
Described isolating transformer comprises two output terminals, for when detecting many tap current mutual inductor secondary connection to be measured, be connected with the off-peak tap of any two no-load voltage ratios in described many tap current mutual inductor to be measured, to input current between coupled two taps;
Described first reometer, is connected with arbitrary output terminal of described isolating transformer, for detecting the output current value of described isolating transformer;
Described second reometer, for when detecting many tap current mutual inductor secondary connection to be measured, two taps maximum with no-load voltage ratio in described many tap current mutual inductor to be measured are connected, and detect the current value between the maximum tap of described no-load voltage ratio.
2. many tap current mutual inductor secondary connection pick-up unit according to claim 1, it is characterized in that, also comprise: impedance meter, described impedance meter is connected with two output terminals of described isolating transformer, for when detecting many tap current mutual inductor secondary connection to be measured, detect the secondary impedance value between two taps being connected with described isolating transformer.
3. many tap current mutual inductor secondary connection pick-up unit according to claim 1, is characterized in that, also comprise: pincerlike meter, for detecting the current value between tap that in described many tap current mutual inductor to be measured, no-load voltage ratio is maximum.
4. many tap current mutual inductor secondary connection pick-up unit according to claim 1, is characterized in that, also comprise: casing, for holding described power end, pressure regulator, isolating transformer, the first reometer and the second reometer.
5. many tap current mutual inductor secondary connection pick-up unit according to claim 2, is characterized in that, also comprise: panel, and described panel comprises the first viewing area and the second viewing area;
Described first viewing area, for exporting the output current of described isolating transformer, and shows the numerical value of the first reometer;
Described second viewing area, for accessing the electric current between two maximum taps of no-load voltage ratio in many tap current mutual inductor to be measured, and shows the numerical value of the second reometer.
6. many tap current mutual inductor secondary connection pick-up unit according to claim 5, is characterized in that, described first viewing area comprises: the first display screen and two input terminals; Wherein,
Described first display screen is connected with described first reometer, for showing the numerical value of described first reometer;
Described two input terminals, are connected with two output terminals of described isolating transformer, respectively for exporting the output current of described isolating transformer.
7. many tap current mutual inductor secondary connection pick-up unit according to claim 5, is characterized in that, described first viewing area comprises: second display screen and two lead-out terminals; Wherein,
Described second display screen is connected with described second reometer, for showing the numerical value of described second reometer;
Described two lead-out terminals, are connected with the two ends of described second reometer respectively, for the two ends by described second reometer of electric current access between two maximum for no-load voltage ratio in many tap current mutual inductor to be measured taps.
8. many tap current mutual inductor secondary connection pick-up unit according to claim 5, it is characterized in that, described panel also comprises: the 3rd viewing area, described 3rd viewing area comprises the 3rd display screen, described 3rd display screen is connected with described impedance meter, for showing the numerical value of described impedance meter.
9. many tap current mutual inductor secondary connection pick-up unit according to claim 5, it is characterized in that, described panel also comprises: power supply area, described power supply area comprises alternating current input socket and power switch, after described power switch is closed, provide alternating current by described input AC electrical socket to power end.
10. many tap current mutual inductor secondary connection pick-up unit according to claim 5, is characterized in that,
Described many tap current mutual inductor secondary connection pick-up unit also comprises: earth terminal;
Described panel also comprises: ground terminal, is connected with described earth terminal, for making earth terminal ground connection by ground wire.
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