CN204832398U - Current transformer secondary wiring detection device that take a percentage more - Google Patents

Abstract

The embodiment of the utility model provides a multi-tap current transformer secondary connection detection device, including: a power supply terminal, a voltage regulator, an isolation transformer, a first ammeter and a second ammeter, and the power supply terminal, a voltage regulator and an isolation transformer connected in sequence; wherein, the isolation transformer includes two output terminals, which are connected to any two non-maximum taps of the multi-tap current transformer to be tested; the first ammeter is connected to any tap of the isolation transformer. connected to one output terminal; the second ammeter is connected to the two taps with the largest transformation ratio in the multi-tap current transformer to be tested. It has higher security and is simpler and faster to implement.

Description

A detection device for the secondary wiring of a multi-tap current transformer

technical field

The utility model relates to the field of electric power detection, in particular to a secondary connection detection device for a multi-tap current transformer.

Background technique

In the power system, the secondary circuit of the current transformer is an important part of protection, measurement and control and automation devices, and a key factor to ensure the correct operation of the protection device and the safe and reliable operation of the power system. The secondary open circuit or incorrect wiring of the current transformer will lead to abnormal equipment or incorrect action of the protection device, which will cause serious harm to the safe operation of the power system. Therefore, the correctness inspection of the secondary circuit wiring of the current transformer is a professional relay protection an important job.

At present, the commonly used methods for current transformer wiring inspection mainly include primary current flow, secondary current flow, and secondary cable check of current transformers. Because the variable bushing current transformer is usually installed on the raised seat, the position of the secondary cable junction box is high, and it is necessary to use a lifting car to climb up the transformer when disconnecting the secondary cable or conducting a current test. The disassembly and assembly inspection of the secondary cable The difficulty is high, and there is a danger of falling from a high altitude during the operation, that is, the safety is low. At the same time, because the one-time current inspection of the multi-tap current transformer requires the cooperation of one-time maintenance and high-voltage test personnel, and after the installation of the main transformer bushing current transformer, it is difficult to realize the one-time high-current inspection due to the large reactance of the main transformer winding. The secondary current circuit; the secondary current inspection time point is multi-faceted and requires the cooperation of multiple secondary maintenance personnel; the multi-tap current transformer, especially the main transformer bushing current transformer has many taps, and the removal and wiring of the secondary cable Due to the large workload and other reasons, using these commonly used methods for checking the wiring of current transformers requires the cooperation of multiple people to complete, which is time-consuming and laborious.

Utility model content

In view of this, the embodiment of the present invention provides a secondary wiring detection device of a multi-tap current transformer to solve the problems in the prior art that the safety is relatively low and it requires the cooperation of multiple people, which is time-consuming and labor-intensive.

In order to achieve the above object, the embodiment of the utility model provides the following technical solutions:

A multi-tap current transformer secondary connection detection device, comprising: a power supply terminal, a voltage regulator, an isolation transformer, a first ammeter and a second ammeter, and the power supply terminal, the voltage regulator and the isolation transformer are connected in sequence; wherein,

The isolation transformer includes two output terminals, which are connected to any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested;

The first ammeter is connected to any output terminal of the isolation transformer;

The second ammeter is connected to the two taps with the largest transformation ratio in the multi-tap current transformer to be tested.

Wherein, the multi-tap current transformer further includes: an impedance meter connected to the two output ends of the isolation transformer to detect the secondary impedance value between the two taps connected to the isolation transformer.

Wherein, the multi-tap current transformer further includes: a clamp meter for detecting the current value between the taps with the largest transformation ratio in the multi-tap current transformer to be tested.

Wherein, the multi-tap current transformer further includes: a box for accommodating the power supply terminal, voltage regulator, isolation transformer, first ammeter and second ammeter.

Wherein, the multi-tap current transformer also includes: a panel, and the panel includes,

Outputting the output current of the isolation transformer, and displaying the value of the first ammeter in the first display area;

Connect the current between the two taps with the largest transformation ratio in the multi-tap current transformer to be tested, and display the value of the second ammeter in the second display area.

Wherein, the first display area includes:

A first display screen connected to the first ammeter to display the value of the first ammeter;

The two input terminals are respectively connected to the two output terminals of the isolation transformer and output the output current of the isolation transformer.

Wherein, the first display area includes:

A second display screen connected to the second ammeter to display the value of the second ammeter;

Connect to both ends of the second ammeter respectively, and connect the current between the two taps with the largest transformation ratio in the multi-tap current transformer to be tested to the two output terminals at both ends of the second ammeter.

Wherein, the panel further includes: a third display area connected to the impedance meter to display the value of the impedance meter, and the third display area includes a third display screen.

Wherein, the panel further includes: a power supply area, and the power supply area includes an AC input socket and a power switch for supplying AC power to the power supply terminal.

Wherein, the detection device for the secondary connection of the multi-tap current transformer also includes: a ground terminal;

The panel further includes: a grounding terminal connected to the grounding terminal and grounding the grounding terminal through a grounding wire.

Based on the above technical solution, the embodiment of the utility model provides a secondary connection detection device for a multi-tap current transformer, including: a power supply terminal, a voltage regulator, an isolation transformer, a first ammeter, and a second ammeter. The transformer and the isolation transformer are connected in turn; wherein, the isolation transformer includes two output terminals, which are connected to any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested; the first ammeter is connected to the isolation transformer. Any output terminal of the transformer is connected; the second ammeter is connected to the two taps with the largest transformation ratio in the multi-tap current transformer to be tested. When it is necessary to detect the secondary wiring of the multi-tap current transformer to be tested, any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested are connected to the output terminal of the isolation transformer, and the multi-tap current transformer to be tested The two taps of the transformer see the input current, and use the first ammeter to detect the output current value of the isolation transformer, that is, to detect the current value of the input isolation transformer, and use the second ammeter to detect the multi-tap current transformer. The current between the two taps with the largest transformation ratio is detected. Since the transformation ratio between the taps of the multi-tap current transformer to be tested is known, it can be determined by judging the current value measured by the first ammeter and the current value measured by the second ammeter. Whether the ratio between the current values is equal to the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer is used to judge whether the secondary wiring of the multi-tap current transformer to be tested is correct. It is only necessary to connect the taps of the multi-tap current transformer to be tested with the multi-tap current transformer provided by the embodiment of the utility model, and read the numbers of the first ammeter and the second ammeter in the multi-tap current transformer, and judge the first ammeter. Whether the ratio between the current value measured by an ammeter and the current value measured by the second ammeter is equal to the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer The detection of the secondary wiring of the multi-tap current transformer does not require staff to work at heights, nor does it require many people to participate in the implementation, which has higher safety and is simpler and faster to implement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural diagram of a multi-tap current transformer secondary wiring detection device provided by an embodiment of the present invention;

Fig. 2 is another connection schematic diagram of the multi-tap current transformer secondary wiring detection device provided by the embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a panel in the secondary connection detection device for a multi-tap current transformer provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Figure 1 is a schematic structural diagram of the multi-tap current transformer secondary wiring detection device provided by the embodiment of the utility model. It is only necessary to connect the taps of the multi-tap current transformer to be tested with the multi-tap current transformer provided by the utility model embodiment , and read the numbers of the first ammeter and the second ammeter in the multi-tap current transformer, and judge whether the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is consistent with the multi-tap current transformer. The maximum transformation ratio of the tapped current transformer is equal to the ratio of the transformation ratio between the taps connected to the isolation transformer, so that the secondary wiring of the multi-tap current transformer can be detected, without the need for staff to work at heights, and does not require the participation of multiple people Implementation has higher security, and the implementation is simpler and quicker; referring to Figure 1, the multi-tap current transformer secondary connection detection device can include: power supply terminal 100, voltage regulator 200, isolation transformer 300, first ammeter 400 and the second ammeter 500.

The power supply terminal 100, the voltage regulator 200 and the isolation transformer 300 are connected in sequence. The power supply terminal 100 is connected in series with the voltage regulator 200 and the isolation transformer 300 so that the power signal input from the power supply terminal 100 can supply power to the voltage regulator 200 and the isolation transformer 300 respectively.

Optionally, the power supply terminal 100 can input AC mains with a voltage of 220 volts.

The voltage regulator 200 is used to adjust the received power information, and the output voltage and output current of the isolation transformer 300 can be controlled by controlling the voltage regulator 200, and the isolation transformer 300 outputs the power information to the voltage regulator 100, The power supply information whose current value is greater than a predetermined value is isolated to keep the output current of the isolation transformer 300 stable.

The isolation transformer 300 includes two output terminals. When the secondary connection of the multi-tap current transformer to be tested is detected, the two output terminals of the isolation transformer 300 are respectively connected to any two non-variable ratios of the multi-tap current transformer to be tested. The largest tap is connected, and the current is input between the two taps connected to it. For example, if the multi-tap current transformer to be tested includes 5 taps, the transformation ratios between the first tap and the second tap, between the third tap, between the fourth tap and the fifth tap are respectively 200 /5, 300/5, 400/5 and 600/5, then, the transformation ratio between the first tap and the fifth tap in the multi-tap current transformer to be tested is the largest, and the two output terminals of the isolation transformer 300 respectively connected to any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested, it is only necessary not to connect the two output terminals of the isolation transformer 300 to the first tap and the fifth tap respectively .

The first ammeter 400 is connected to any output terminal of the isolation transformer 300, and the current value of the output current of the isolation transformer 300 is detected by the first ammeter 400. Since the two output terminals of the isolation transformer 300 are connected to the multi-tap current transformer to be tested respectively Any two taps with non-maximum transformation ratios are connected. Therefore, it can also be said that the current value input to the isolation transformer is detected through the first ammeter 400 .

When detecting the secondary wiring of the multi-tap current transformer to be tested, connect the second ammeter 500 to the two taps with the largest transformation ratio in the multi-tap current transformer to be tested, and detect the current value between the taps with the largest transformation ratio. For example, if the multi-tap current transformer to be tested includes 5 taps, the transformation ratios between the first tap and the second tap, between the third tap, between the fourth tap and the fifth tap are 200/5 . The two taps with the largest transformation ratio in the transformer are connected, that is, the second ammeter 500 is connected with the first tap and the fifth tap.

Since the transformation ratio between each tap of the multi-tap current transformer to be tested is known, it can be determined that the first ammeter 400 and the second ammeter respectively detect the two taps in the multi-tap current transformer to be tested, and determine the taps to be tested. After detecting the transformation ratio between the taps, by judging the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter, the maximum transformation ratio of the multi-tap current transformer to be tested and the connection with the isolation transformer Whether the ratio of the transformation ratio between the taps is equal or not is used to judge whether the secondary wiring of the multi-tap current transformer to be tested is correct.

Among them, it should be noted that judging the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is related to the maximum transformation ratio of the multi-tap current transformer to be tested and the ratio between the taps connected to the isolation transformer. Whether the ratios of the transformation ratios are equal. The ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is not required, and the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer is Only when the values are equal can the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter be determined, and the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation between the taps connected to the isolation transformer be determined. Whether the ratios are equal. Due to errors and other reasons, the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is the same as the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer. Whether or not the ratios are equal may be equal within a tolerance range of error.

For example, if the multi-tap current transformer to be tested includes 5 taps, the transformation ratios between the first tap and the second tap, between the third tap, between the fourth tap and the fifth tap are 200/5 , 300/5, 400/5 and 600/5, the output terminals of the isolation transformer 300 are respectively connected to the first tap and the second tap, and the output voltage of the isolation transformer 300 is adjusted to 3A through the voltage regulator 200, that is, the first The reading of the ammeter 400 is 3A, the current input between the first tap and the second tap of the multi-tap current transformer to be tested is 3A, and the allowable error of setting is 0.1A. Then, because the transformation ratio between the first tap and the fifth tap, that is, the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested, and the transformation ratio between the first tap and the second tap is (600/5)/(200/5)=3, then, only need to read out the value of the second current, by judging the current value measured by the first ammeter and the current value measured by the second ammeter Whether the ratio is 3 is used to determine whether the secondary wiring of the multi-tap current transformer to be tested is correct. If the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is 3, that is, 3/the current value measured by the second ammeter=3, that is, the value of the second ammeter read is between 1A±0.1A, then it is considered that the secondary wiring of the multi-tap current transformer to be tested is correct; on the contrary, if the value read by the second ammeter is no longer between 1A±0.1A, it is considered that, There is an error in the secondary wiring of the multi-tap current transformer to be tested.

Based on the above technical solution, the embodiment of the utility model provides a secondary connection detection device for a multi-tap current transformer, including: a power supply terminal, a voltage regulator, an isolation transformer, a first ammeter, and a second ammeter. The transformer and the isolation transformer are connected in turn; wherein, the isolation transformer includes two output terminals, which are connected to any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested; the first ammeter is connected to the isolation transformer. Any output terminal of the transformer is connected; the second ammeter is connected to the two taps with the largest transformation ratio in the multi-tap current transformer to be tested. When it is necessary to detect the secondary wiring of the multi-tap current transformer to be tested, any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested are connected to the output terminal of the isolation transformer, and the multi-tap current transformer to be tested The two taps of the transformer see the input current, and use the first ammeter to detect the output current value of the isolation transformer, that is, to detect the current value of the input isolation transformer, and use the second ammeter to detect the multi-tap current transformer. The current between the two taps with the largest transformation ratio is detected. Since the transformation ratio between the taps of the multi-tap current transformer to be tested is known, it can be determined by judging the current value measured by the first ammeter and the current value measured by the second ammeter. Whether the ratio between the current values is equal to the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer is used to judge whether the secondary wiring of the multi-tap current transformer to be tested is correct. It is only necessary to connect the taps of the multi-tap current transformer to be tested with the multi-tap current transformer provided by the embodiment of the utility model, and read the numbers of the first ammeter and the second ammeter in the multi-tap current transformer, and judge the first ammeter. Whether the ratio between the current value measured by an ammeter and the current value measured by the second ammeter is equal to the ratio between the maximum transformation ratio of the multi-tap current transformer to be tested and the transformation ratio between the taps connected to the isolation transformer The detection of the secondary wiring of the multi-tap current transformer does not require staff to work at heights, nor does it require many people to participate in the implementation, which has higher safety and is simpler and faster to implement.

Optionally, Fig. 2 shows another schematic diagram of the connection of the multi-tap current transformer secondary connection detection device provided by the embodiment of the present invention. Referring to Fig. 2, the multi-tap current transformer secondary connection detection device may also include : Impedance meter 600.

The impedance meter 600 is connected to the two output ends of the isolation transformer 300. When the secondary wiring of the multi-tap current transformer to be tested is detected, the impedance meter 600 can detect the secondary impedance value between the two taps connected to the isolation transformer 300, It is also possible to use the impedance meter 600 to carry out the impedance test of the professional secondary flow of the relay protection.

Optionally, the multi-tap current transformer secondary wiring detection device provided by the embodiment of the utility model may also include a clamp meter. When the multi-tap current transformer to be tested has been connected to the multi-tap current transformer secondary wiring detection device Finally, the current measurement of the multi-tap current transformer to be tested can also be carried out through the clamp meter, without the need to firstly connect the connection relationship between the multi-tap current transformer to be tested and the secondary wiring detection device Cutting off provides convenience for the measurement of the current of the multi-tap current transformer to be tested.

At the same time, the clamp meter can also be used to find out whether there is a short circuit between the terminals of the multi-tap current transformer to be tested, so as to avoid accidents caused by short-circuit or open circuit of the secondary winding taps of the multi-tap current transformer to be tested happened.

Optionally, the device for detecting the secondary connection of the multi-tap current transformer provided in the embodiment of the present invention may further include: a box body.

The box body is used for accommodating the power terminal 100 , the voltage regulator 200 , the isolation transformer 300 , the first ammeter 400 and the second ammeter 500 .

When the detection device for the secondary connection of the multi-tap current transformer provided by the embodiment of the present invention further includes the impedance meter 600, the impedance meter 600 can also be placed in the box.

The power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the first ammeter 400 and the second ammeter 500 are housed in the box, so that the power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the first ammeter 400 and the second ammeter The ammeter 500 is fixed in a box, which is convenient for centralized operation, saves space, and is convenient for storage and transportation.

Optionally, the power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the first ammeter 400 and the second ammeter 500 can be placed inside the box. Since the box has a casing, the casing has a protective and blocking effect, therefore, In this way, the power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the first ammeter 400 and the second ammeter 500 can be well protected; 1. Both the first ammeter 400 and the second ammeter 500 are not easy to lose, which protects the integrity of the secondary wiring detection device of the multi-tap current transformer.

Optionally, the power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the first ammeter 400 and the second ammeter 500 can be placed on the surface of the box, and the power supply terminal 100, the voltage regulator 200, the isolation transformer 300, the second ammeter The first ammeter 400 and the second ammeter 500 are placed on the surface of the box, so that the secondary connection detection device of the multi-tap current transformer can be used at any time for analog detection of performance attribute detection of capacitive equipment.

Optionally, the detection device for the secondary wiring of the multi-tap current transformer provided in the embodiment of the present utility model may also include: a panel 700, which can realize the detection of the secondary wiring of the multi-tap current transformer by operating the equipment on the panel 700, so that The operation process is simpler and more convenient.

Optionally, FIG. 3 shows a schematic structural diagram of a panel 700 in a multi-tap current transformer secondary connection detection device provided by an embodiment of the present invention. Referring to FIG. 2 , the panel 700 may include: a first display area 710 and a second display area 710 Two display areas 720, wherein,

The first display area 710 is used to output the output current of the isolation transformer 300 and display the value of the first ammeter 400 .

Optionally, the first display area 710 may include: a first display screen and two input terminals.

Wherein, the first display screen is connected with the first ammeter 400 for displaying the value of the first ammeter 400 .

The two input terminals are respectively connected to the two output terminals of the isolation transformer 300 for outputting the output current of the isolation transformer 300 .

The second display area 720 is used to connect the current between the two taps with the largest transformation ratio in the multi-tap current transformer to be tested, and display the value of the second ammeter.

Optionally, the second display area 720 may include: a second display screen and two output terminals.

Wherein, the second display screen is connected to the second ammeter 500 for displaying the value of the second ammeter 500 .

The two output terminals are respectively connected to the two ends of the second ammeter 500 for connecting the current between the two taps with the largest transformation ratio among the multi-tap current transformer to be tested to the two ends of the second ammeter 500 .

Optionally, refer to FIG. 3 , which is a schematic structural diagram of a panel 700 in a device for detecting secondary connections of a multi-tap current transformer provided by an embodiment of the present invention. The panel 700 in the device may further include: a third display area 730 .

When the detection device for the secondary connection of the multi-tap current transformer provided by the embodiment of the present invention includes the impedance meter 600 , a third display area 730 can be set on the panel 700 for displaying the value of the impedance meter 600 .

Optionally, the third display area 730 may include a third display screen connected to the impedance meter 600 for displaying values of the impedance meter 600 .

When the multi-tap current transformer secondary connection detection device provided by the embodiment of the present invention includes a clamp meter, a clamp meter jack 740 can be set on the panel 700, and the clamp meter can be inserted into the clamp meter jack After 740, the current value between the two taps of the maximum transformation ratio in the multi-tap current transformer to be tested can be read on the clamp meter 740.

Optionally, referring to FIG. 3 , the panel 700 of the secondary wiring detection device for multi-tap current transformers provided by the embodiment of the present invention may also include: a power supply area 750,

The power supply area 750 includes an AC input socket and a voltage switch. The AC input socket is connected to the power supply terminal 100. When the voltage switch is closed, the multi-tap current transformer secondary wiring detection device provided by the embodiment of the utility model starts to work, and can be input through AC. The socket provides AC power to the power supply terminal 100, and when the voltage switch is not closed, the secondary connection detection device of the multi-tap current transformer provided by the embodiment of the utility model stops working.

Optionally, the AC input socket can be connected to a 220-volt AC mains.

Optionally, the AC input socket may be a three-hole socket.

Optionally, the device for detecting the secondary connection of the multi-tap current transformer provided in the embodiment of the present invention may further include: a grounding terminal.

Correspondingly, optionally, referring to FIG. 3 , the panel 700 of the multi-tap current transformer secondary connection detection device provided by the embodiment of the present invention may also include: a ground terminal 760, which is connected with the multi-tap current transformer secondary connection detection device It is used to ground the ground terminal through the ground wire to prevent accidents such as leakage.

The secondary wiring detection device of the multi-tap current transformer provided by the embodiment of the utility model only needs to connect the taps of the multi-tap current transformer to be tested with the multi-tap current transformer provided by the embodiment of the utility model, and read out the The numbers of the first ammeter and the second ammeter in the multi-tap current transformer are used to determine whether the ratio between the current value measured by the first ammeter and the current value measured by the second ammeter is consistent with the maximum change of the multi-tap current transformer to be tested. The ratio between the taps connected to the isolation transformer is equal to the ratio of the transformation ratio between the taps, and the secondary wiring of the multi-tap current transformer can be detected. It does not require staff to work at high altitudes, and does not require many people to participate in the implementation. It has a higher security with simpler and faster implementation.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a current transformer secondary wiring detection device that takes a percentage more, its characterized in that includes: the power supply device comprises a power supply end, a voltage regulator, an isolation transformer, a first ammeter and a second ammeter, wherein the power supply end, the voltage regulator and the isolation transformer are sequentially connected; wherein,

the isolation transformer comprises two output ends which are connected with any two taps with non-maximum transformation ratios in the multi-tap current transformer to be tested;

the first ammeter is connected with any output end of the isolation transformer;

and the second ammeter is connected with the two taps with the largest transformation ratio in the multi-tap current transformer to be tested.

2. The multi-tap current transformer secondary wiring detection device of claim 1, further comprising: and the impedance meter is connected with the two output ends of the isolation transformer and is used for detecting the secondary impedance value between the two taps connected with the isolation transformer.

3. The multi-tap current transformer secondary wiring detection device of claim 1, further comprising: and the clamp meter is used for detecting the current value between the taps with the largest ratio in the multi-tap current transformer to be detected.

4. The multi-tap current transformer secondary wiring detection device of claim 1, further comprising: and the box body is used for accommodating the power supply end, the voltage regulator, the isolation transformer, the first ammeter and the second ammeter.

5. The multi-tap current transformer secondary wiring detection device of claim 2, further comprising: a panel comprising, in combination,

outputting the output current of the isolation transformer, and displaying the numerical value of a first ammeter in a first display area;

and connecting the current between the two taps with the maximum transformation ratio in the multi-tap current transformer to be tested, and displaying the numerical value of the second ammeter in a second display area.

6. The multi-tap current transformer secondary wiring detection device of claim 5, wherein the first display area comprises:

the first display screen is connected with the first ammeter and is used for displaying the numerical value of the first ammeter;

and the two input terminals are respectively connected with the two output ends of the isolation transformer and output the output current of the isolation transformer.

7. The multi-tap current transformer secondary wiring detection device of claim 5, wherein the first display area comprises:

the second display screen is connected with the second ammeter and is used for displaying the numerical value of the second ammeter;

and the current between two taps with the maximum transformation ratio in the multi-tap current transformer to be tested is connected to two output terminals at two ends of the second ammeter respectively.

8. The multi-tap current transformer secondary wiring detection device of claim 5, wherein said panel further comprises: and the third display area is connected with the impedance meter and used for displaying the numerical value of the impedance meter, and the third display area comprises a third display screen.

9. The multi-tap current transformer secondary wiring detection device of claim 5, wherein said panel further comprises: a power supply area including an alternating current input socket and a power switch that supply alternating current to power supply terminals.

10. The multi-tap current transformer secondary wiring detection device of claim 5,

the secondary wiring detection device of the multi-tap current transformer further comprises: a ground terminal;

the panel further includes: and a ground terminal connected to the ground terminal and grounded via a ground line.