Intelligent control test device with multi-tap standard current transformer and corollary equipment

Abstract

The utility model provides an intelligent control test device with a multi-tap standard current transformer and corollary equipment. The intelligent control test device comprises a logic interlocking automatic fling-cut switch, a current transformer, a controller and a current booster, the logic interlocking automatic fling-cut switch is provided with a switch assembly, a primary side execution mechanism and a secondary side execution mechanism. The output end of the current booster is connected with the primary side executing mechanism, and the primary side executing mechanism and the secondary side executing mechanism are respectively connected with the current transformer; the output end of the secondary side execution mechanism is connected with the current verification cabinet adapter plate. The switch assembly is provided with a plurality of contactors, the plurality of contactors are respectively arranged on the primary side execution mechanism and the secondary side execution mechanism, and the controller respectively controls each contactor to act so as to realize tests in different current ranges. The current gear can be flexibly adjusted according to the load requirement, the test requirement is met, and the test efficiency and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformers, and particularly relates to an intelligent control test device with a multi-tap standard current transformer and supporting equipment. Background Art

[0002] The standard current transformer is used as a current transformer calibration standard in the error test of the transformer. It mainly consists of a primary coil, a secondary coil, an iron core, an insulating support, an outlet terminal, etc. The iron core of the current transformer is made of laminated silicon steel sheets. Its primary coil is connected in series with the main circuit, and the measured current passes through it, generating an alternating magnetic flux in the iron core, causing the secondary coil to induce a corresponding secondary current. The types of standard current transformers include AKH-0.66 / I type, AKH-0.66 / II type, AKH-0.66 / III type, etc.

[0003] As a traditional test device, the standard current transformer has a relatively fixed output, which means that the measurement range of the measuring device is relatively fixed, resulting in the inability of the standard current transformer to quickly match the changing current output by the current booster.

[0004] To solve this problem, a common method is to add adjustable taps on the primary side or secondary side of the transformer. By changing the position of the tap, the voltage ratio and current output of the standard current transformer are changed. However, the existing technology still has some disadvantages, such as: the number of taps is limited, resulting in a limited adjustable range and being difficult to meet the usage requirements. Summary of the Utility Model

[0005] In order to overcome the above deficiencies in the prior art, the utility model provides an intelligent control test device with a multi-tap standard current transformer and supporting equipment, which is at least used to solve the problem that the limited number of taps leads to a limited adjustable range and is difficult to meet the usage requirements.

[0006] The device includes: a logic interlock automatic switching switch, a current transformer, a controller, and a current booster;

[0007] The logic interlock automatic switching switch is provided with a switch assembly, a primary side actuator, and a secondary side actuator;

[0008] The output end of the current booster is connected to the primary side actuator, and the primary side actuator and the secondary side actuator are respectively connected to the current transformer; the output end of the secondary side actuator is connected to the current calibration cabinet adapter board;

[0009] The switch assembly is provided with a plurality of contactors, and the plurality of contactors are respectively arranged on the primary side actuator and the secondary side actuator. The controller controls the action of each contactor respectively to realize tests for different current ranges.

[0010] It should be further noted that the primary actuator is provided with 8 primary taps and 1 through-core current range, and a current test unit is formed between the first primary tap and any other primary tap.

[0011] It should be further noted that the secondary actuator is provided with 15 secondary taps.

[0012] It should be further noted that the current booster is a linearly adjustable current boosting current source device, and the adjustable range is from 0 to 5000A.

[0013] It should be further noted that the switch assembly is provided with contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6 and 1KM7;

[0014] The first output terminal of the current booster is connected to the first end of the output copper bar through the first primary tap P1;

[0015] The second output terminal of the current booster is also respectively connected to the normally open first ends of contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6 and 1KM7;

[0016] The second output terminal of the current booster is also connected to the current transformer;

[0017] The normally open second end of contactor 1KM1 is connected to the second primary tap P2 and the current transformer;

[0018] The normally open second end of contactor 1KM2 is connected to the third primary tap P3 and the current transformer;

[0019] The normally open second end of contactor 1KM3 is connected to the fourth primary tap P4 and the current transformer;

[0020] The normally open second end of contactor 1KM4 is connected to the fifth primary tap P5 and the current transformer;

[0021] The normally open second end of contactor 1KM5 is connected to the sixth primary tap P6 and the current transformer;

[0022] The normally open second end of contactor 1KM6 is connected to the seventh primary tap P7 and the current transformer;

[0023] The normally open second end of contactor 1KM7 is connected to the eighth primary tap P8 and the current transformer;

[0024] The controller is respectively connected to the coils of contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6 and 1KM7, and respectively controls the on / off of contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6 and 1KM7.

[0025] Furthermore, it should be noted that the switch assembly is also provided with contactors 2KM1, 2KM2 and 2KM3;

[0026] The output end of the current transformer is connected with a first output line and a second output line;

[0027] The normally open first end of contactor 2KM1 is connected to the first output line;

[0028] The first end of the first normally open end of contactor 2KM2 is connected to the first output line, and the second end of the first normally open end of contactor 2KM2 and the second end of the second normally open end of contactor 2KM3 are connected to the second connection end of the current calibration cabinet adapter board;

[0029] The normally open second end of contactor 2KM1 is respectively connected to the first end of the second normally open end of contactor 2KM2, the first end of the first normally open end of contactor 2KM3 and the first output line; the second end of the second normally open end of contactor 2KM2 and the second end of the second normally open end of contactor 2KM3 are respectively connected to the first connection end of the current calibration cabinet adapter board.

[0030] Furthermore, it should be noted that the secondary-side actuator is provided with multiple secondary execution line units;

[0031] The first end of each secondary execution line unit is connected to the second output line through the normally open end of a contactor;

[0032] The second end of the secondary execution line unit is connected to the first end of the second normally open end of contactor 2KM3 through the normally open end of another contactor.

[0033] From the above technical solutions, it can be seen that the present utility model has the following advantages:

[0034] The intelligent control test device with a multi-tap standard current transformer and supporting equipment provided by the present utility model uses the matching and switching of multiple taps on the primary side and the secondary side to transform multiple current gears, and can flexibly adjust the current gears according to the needs of the load to meet the test requirements and improve the test efficiency and stability.

[0035] Moreover, the utility model can control the switch assembly through a controller to realize the on-off connection inside the primary-side actuator and the secondary-side actuator respectively, so as to achieve a short tap switching time and meet the measurement requirements of different current ranges. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Schematic diagram of the primary side of the intelligent control test device;

[0038] Figure 2 Schematic diagram of the secondary side of the intelligent control test device. Detailed Embodiments

[0039] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this patent.

[0040] As Figures 1 to 2 shown, the intelligent control test device with a multi-tap standard current transformer and supporting equipment provided by the present utility model includes: a logic interlock automatic switching switch, a current transformer 2, a controller, and a current booster 1; wherein, the logic interlock automatic switching switch is provided with a switch assembly, a primary-side actuator, and a secondary-side actuator; the output end of the current booster 1 is connected to the primary-side actuator, and the primary-side actuator and the secondary-side actuator are respectively connected to the current transformer 2; the output end of the secondary-side actuator is connected to the current calibration cabinet adapter plate; the switch assembly is provided with a plurality of contactors, and the plurality of contactors are respectively arranged on the primary-side actuator and the secondary-side actuator, and the controller controls the action of each contactor respectively to realize tests for different current ranges.

[0041] In an embodiment of the present utility model, the primary-side actuator may be provided with 8 taps and 1 through-core current range, and a unit is formed between each tap and the adjacent two taps. The secondary-side actuator is provided with 15 taps and a secondary output range switching tap. The controller may adopt an STM32 single-chip microcomputer or an ARM microprocessor. Switch assembly: configured to establish or disconnect a connection between any two units of the primary-side actuator and the secondary-side actuator respectively according to the instructions of the controller. The current booster 1 is a linearly adjustable current boosting current source device, which can achieve a variable output current from 0 to 5000 A, and can intelligently match the standard current transformer 2 to supply a variable and stable current to it.

[0042] In this embodiment, the switch assembly is provided with contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6, 1KM7, 2KM1, 2KM2, 2KM3, 2KM4, 2KM5, 2KM6, 2KM7, 2KM8, 2KM9, 2KM10, 2KM11, 2KM12, 2KM13, 2KM14, 2KM15, 2KM16, 2KM17, 2KM18, 2KM19, 2KM20, 2KM21, 2KM22, 2KM23, 2KM24, 2KM25, 2KM26 and contactor 2KM27.

[0043] The first output terminal of the current booster 1 is connected to the first end of the output copper bar through the first primary tap P1; the second output terminal of the current booster 1 is connected to the second end of the output copper bar through the second primary tap I. The second output terminal of the current booster 1 is also respectively connected to the normally open first ends of contactors 1KM1, 1KM2, 1KM3, 1KM4, 1KM5, 1KM6 and 1KM7. The second output terminal of the current booster 1 is also connected to the current transformer 2.

[0044] The normally open second terminal of contactor 1KM1 is connected to the second primary tap P2 and current transformer 2; the normally open second terminal of contactor 1KM2 is connected to the third primary tap P3 and current transformer 2; the normally open second terminal of contactor 1KM3 is connected to the fourth primary tap P4 and current transformer 2; the normally open second terminal of contactor 1KM4 is connected to the fifth primary tap P5 and current transformer 2; the normally open second terminal of contactor 1KM5 is connected to the sixth primary tap P6 and current transformer 2; the normally open second terminal of contactor 1KM6 is connected to the seventh primary tap P7 and current transformer 2; the normally open second terminal of contactor 1KM7 is connected to the eighth primary tap P8 and current transformer 2.

[0045] The controller is respectively connected to the coils of contactor 1KM1, contactor 1KM2, contactor 1KM3, contactor 1KM4, contactor 1KM5, contactor 1KM6 and contactor 1KM7, and respectively controls the on / off of contactor 1KM1, contactor 1KM2, contactor 1KM3, contactor 1KM4, contactor 1KM5, contactor 1KM6 and contactor 1KM7.

[0046] In this embodiment, the secondary-side actuator is provided with a secondary second execution line unit, a secondary third execution line unit, a secondary fourth execution line unit, a secondary fifth execution line unit, a secondary sixth execution line unit, a secondary seventh execution line unit, a secondary eighth execution line unit, a secondary ninth execution line unit, a secondary tenth execution line unit, a secondary eleventh execution line unit, a secondary twelfth execution line unit and a secondary thirteenth execution line unit.

[0047] The output terminal of current transformer 2 is connected with a first output line and a second output line; the normally open first terminal of contactor 2KM1 is connected with the first output line, and the connection point is defined as the S0 control point.

[0048] The first end of the first normally open end of contactor 2KM2 is connected with the first output line, and the second end of the first normally open end of contactor 2KM2 and the second end of the second normally open end of contactor 2KM3 are connected to the second connection end of the current calibration cabinet adapter board.

[0049] The normally open second terminal of contactor 2KM1 is respectively connected with the first end of the second normally open end of contactor 2KM2, the first end of the first normally open end of contactor 2KM3 and the first output line, and the connection point with the first output line is defined as the S1 control point; the second end of the second normally open end of contactor 2KM2 and the second end of the second normally open end of contactor 2KM3 are respectively connected to the first connection end of the current calibration cabinet adapter board.

[0050] The first end of the secondary second execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM16; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM4.

[0051] The first end of the secondary third execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM17; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM5.

[0052] The first end of the tertiary fourth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM18; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM6.

[0053] The first end of the secondary fifth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM19; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM7.

[0054] The first end of the secondary sixth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM20; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM8.

[0055] The first end of the secondary seventh execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM21; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM9.

[0056] The first end of the secondary eighth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM22; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM10.

[0057] The first end of the secondary ninth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM23; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM11.

[0058] The first end of the secondary tenth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM24; the second end of the secondary second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM12.

[0059] The first end of the second eleventh execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM25; the second end of the second second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM13.

[0060] The first end of the second tenth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM26; the second end of the second second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM14.

[0061] The first end of the second tenth execution circuit unit is connected to the second output line through the normally open contact of contactor 2KM27; the second end of the second second execution circuit unit is connected to the first end of the second normally open contact of contactor 2KM3 through the normally open contact of contactor 2KM15.

[0062] Based on the above intelligent control test device with a multi-tap standard current transformer and supporting equipment, when different currents need to be measured, the controller selects the corresponding contactors of the primary side actuator and the secondary side actuator according to the load demand to connect them to each other.

[0063] For example, if the maximum current needs to be output, the controller can select contactor 1KM1 of the primary side actuator to close, and contactors 2KM1, 2KM2, 2KM3, 2KM4, and 2KM16 of the secondary side actuator to close to form a connection loop. In this way, the turns ratio of the primary side and the secondary side of the logic interlock automatic switching switch reaches the maximum value, and the voltage ratio and current output of current transformer 2 also reach the maximum value.

[0064] It should be noted that as shown in Table 1, in the primary side actuator, a first current test unit for measuring a primary current of 900A to 500A is formed between the first primary tap P1 and the second primary tap P2. A second current test unit for measuring a primary current of 400 to 250A is formed between tap P1 and tap P3. A third current test unit for measuring a primary current of 200 to 100A is formed between tap P1 and tap P4. A fourth current test unit for measuring a primary current of 80 to 50A is formed between tap P1 and tap P5, and so on. In the secondary side actuator, secondary side units with different secondary current ranges can also be formed in the above manner.

[0065] Table 1

[0066]

[0067] In this embodiment, the controller can control the corresponding contactors of the switch assembly to close according to different combination methods, so as to detect currents in different ranges. According to actual needs, both the primary actuator and the secondary actuator have N taps, and each tap can form a unit with two adjacent taps. Therefore, there are a total of N - 1 units. If any two units can be arbitrarily selected for connection on each side, then there are (N - 1)(N - 1) connection methods. In this way, the quasi-current transformer can transform (N - 1)(N - 1) current gears. Optionally, the controller can monitor the current transformer gear switching signal and perform current boosting according to the command, and the boosted current value matches the gear.

[0068] The utility model utilizes the matching and switching of multiple taps on the primary side and the secondary side to transform up to 40 current gears. In this way, the current gear can be flexibly adjusted according to the load requirements, improving the efficiency and stability of the test.

[0069] It should be noted that the secondary side of the current booster forms a series circuit with the primary side of the current transformer. The tap is selected by the contactor to measure the corresponding current, or when the current is greater than 1000A, the current is measured by passing through the core. After selecting the measurement gear on the primary side of the current transformer, immediately the secondary side will also select through the contactor to switch out the secondary side gear corresponding to the primary side as Figure 2 shown.

[0070] The utility model can control the switch assembly through the controller to realize the on-off connection inside the primary actuator and the secondary actuator respectively, achieve a short tap switching time, meet the measurement requirements of different current ranges, and improve the output quality of the current booster.

[0071] Optionally, the utility model can monitor the state of the standard device in real time. The controller can make a quick adjustment according to the monitored standard current transformer gear switching signal and the real-time current value, so that the current value matches the gear.

[0072] The intelligent control test device with a multi-tap standard current transformer and supporting equipment provided by the utility model can be implemented in hardware, software, firmware, or any combination thereof. The various features described as modules, units, or components can be implemented together in an integrated logic device or separately as discrete but interoperable logic devices or other hardware devices. In some cases, the various features of the electronic circuit can be implemented as one or more integrated circuit devices, such as integrated circuit chips or chip sets.

[0073] In the description, claims and above-mentioned drawings of the present utility model, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0074] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent control test device with a multi-tap standard current transformer and supporting equipment, characterized in that: include: Logical interlocking automatic switching switches, current transformers, controllers and current boosters; The logic interlocking automatic switching switch is provided with a switch assembly, a primary side actuator and a secondary side actuator; The output end of the current booster is connected to the primary side actuator, and the primary side actuator and the secondary side actuator are respectively connected to the current transformer; the output end of the secondary side actuator is connected to the current calibration cabinet adapter board; The switch assembly is provided with a plurality of contactors, and the plurality of contactors are respectively arranged on the primary side actuator and the secondary side actuator, and the controller controls the action of each contactor respectively to realize the test of different current ranges.

2. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 1 is characterized in that: The primary side actuator is provided with 8 primary taps and 1 core-through current gear, and a current test unit is formed between the first primary tap and any other primary tap.

3. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 1, characterized in that: The secondary side actuator is provided with 15 secondary taps.

4. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 1, characterized in that: The current booster is a linear adjustable current boost current source device with an adjustable range of 0 to 5000A.

5. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 1 or 2, characterized in that: The switch assembly is provided with contactor 1KM1, contactor 1KM2, contactor 1KM3, contactor 1KM4, contactor 1KM5, contactor 1KM6 and contactor 1KM7; The first output end of the current booster is connected to the first end of the output copper busbar through the first primary tap P1; The second output end of the current booster is also connected to the normally open first end of contactor 1KM1, the normally open first end of contactor 1KM2, the normally open first end of contactor 1KM3, the normally open first end of contactor 1KM4, the normally open first end of contactor 1KM5, the normally open first end of contactor 1KM6 and the normally open first end of contactor 1KM7 respectively; The second output end of the current booster is also connected to the current transformer; The normally open second end of contactor 1KM1 is connected to the second primary tap P2 and the current transformer; The normally open second end of contactor 1KM2 is connected to the third primary tap P3 and the current transformer; The normally open second end of contactor 1KM3 is connected to the fourth primary tap P4 and the current transformer; The normally open second end of contactor 1KM4 is connected to the fifth primary tap P5 and the current transformer; The normally open second end of contactor 1KM5 is connected to the sixth primary tap P6 and the current transformer; The normally open second end of contactor 1KM6 is connected to the seventh primary tap P7 and the current transformer; The normally open second end of contactor 1KM7 is connected to the eighth primary tap P8 and the current transformer; The controller is respectively connected to the coil of contactor 1KM1, the coil of contactor 1KM2, the coil of contactor 1KM3, the coil of contactor 1KM4, the coil of contactor 1KM5, the coil of contactor 1KM6 and the coil of contactor 1KM7, and controls the on and off of contactor 1KM1, contactor 1KM2, contactor 1KM3, contactor 1KM4, contactor 1KM5, contactor 1KM6 and contactor 1KM7 respectively.

6. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 1 or 3, characterized in that: The switch assembly is also provided with contactor 2KM1, contactor 2KM2, and contactor 2KM3; The output end of the current transformer is connected to a first output line and a second output line; The normally open first end of the contactor 2KM1 is connected to the first output line; The first end of the first normally open end of the contactor 2KM2 is connected to the first output line, and the second end of the first normally open end of the contactor 2KM2 and the second end of the second normally open end of the contactor 2KM3 are connected to the second connection end of the current test cabinet adapter board; The normally open second end of contactor 2KM1 is respectively connected to the first end of the second normally open end of contactor 2KM2, the first end of the first normally open end of contactor 2KM3 and the first output line; the second end of the second normally open end of contactor 2KM2 and the second end of the second normally open end of contactor 2KM3 are respectively connected to the first connection end of the current testing cabinet adapter board.

7. The intelligent control test device with multi-tap standard current transformer and supporting equipment according to claim 6, characterized in that: The secondary side actuator is provided with multiple secondary execution circuit units; The first end of each secondary execution circuit unit is connected to the second output circuit through the normally open end of the contactor; The second end of the secondary execution circuit unit is connected to the first end of the second normally open end of the contactor 2KM3 through the normally open end of another contactor.

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