Portable power transformer wiring group and polarity tester

Abstract

The utility model discloses a portable power transformer wiring group and polarity tester, which comprises a box body, an electrical element and a tester, the electrical element is provided with primary side self-reset buttons SB1, SB2 and SB3, secondary side self-locking buttons SB4, SB5 and SB5, a switch, a power supply and a direct current millivoltmeter, the primary side outside the tester is provided with terminals A, B and C phases, and the secondary side outside the tester is provided with terminals A, B and C phases. The secondary side is provided with a terminal a, a terminal b and a terminal c, the phase a and the phase b are connected with the positive electrode and the negative electrode of a direct-current millivoltmeter through an SB4, the phase b and the phase c are connected with the positive electrode and the negative electrode of the direct-current millivoltmeter through an SB5, and the phase a and the phase c are connected with the positive electrode and the negative electrode of the direct-current millivoltmeter through an SB6; according to the tester, external primary side and secondary side wiring terminals can be simplified, measurement can be carried out only by connecting specific terminals, the wiring complexity is reduced, the test efficiency is improved, and the equipment applicability is improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical testing of power generation equipment, in particular to a portable power transformer wiring group and polarity tester. Background Art

[0002] The continuous development of China's power system places higher demands on the flexibility of peak and frequency regulation for thermal power units. As key equipment in the power system, the stability and reliability of power transformers are crucial to the normal operation of the power system and the quality of power supply. Power transformers must undergo wiring group and polarity testing before shipment, during handover, during combined use, and after overhaul to determine polarity and wiring group accuracy. This prevents polarity wiring errors and circulating currents caused by combined use of equipment, ensuring the safe and reliable operation of power transformers.

[0003] In the existing technology, the current power transformer wiring group and polarity testing, the test instrument is bulky and inconvenient to carry, and the primary and secondary side wiring and testing require the collaboration of multiple people to complete, resulting in complex wiring, low test efficiency, and large test data errors.

[0004] Therefore, it is necessary to propose a portable power transformer wiring group and polarity tester to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a portable power transformer wiring group and polarity tester to solve the problems of heavy testing instruments, inconvenient transportation, primary and secondary side wiring and testing requiring the collaboration of multiple people, complex wiring, low test efficiency, and large test data errors.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A portable power transformer wiring group and polarity tester includes a housing, electrical components, and the tester. The electrical components include a primary-side self-reset button, a secondary-side self-locking button, a switch, a power supply, and a DC millivoltmeter. The primary-side self-reset buttons include self-reset button SB1, self-reset button SB2, and self-reset button SB3. The secondary-side self-locking buttons include self-locking button SB4, self-locking button SB5, and self-locking button SB6.

[0008] The tester provides wiring terminals. The external primary-side wiring terminals of the tester include terminals A-phase, B-phase, and C-phase. The primary-side terminals A-phase and B-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB1 and the switch. The primary-side terminals B-phase and C-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB2 and the switch. The primary-side terminals A-phase and C-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB3 and the switch.

[0009] The external secondary side wiring terminals of the tester include terminal a phase, terminal b phase, and terminal c phase. The secondary side terminals a phase and b phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB4, the secondary side terminals b phase and c phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB5, and the secondary side terminals a phase and c phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB6.

[0010] Preferably, the self-reset button SB1, the self-reset button SB2, the self-reset button SB3, the self-locking button SB4, the self-locking button SB5, and the self-locking button SB6 respectively provide two pairs of normally open contacts.

[0011] Preferably, the power supply is two 1.5V dry batteries.

[0012] Preferably, the tester provides three-phase terminal blocks to implement polarity and group measurements of single-phase two-winding transformers and three-phase two-winding transformers to meet the testing requirements of power transformers of different specifications and models.

[0013] Preferably, by selecting the primary side self-reset button SB1, self-reset button SB2, self-reset button SB3 and the secondary side self-locking button SB4, self-locking button SB5, self-locking button SB6 differently, and comparing with the wiring group identification table, the polarity and group test is completed.

[0014] The technical effects and advantages of this utility model are:

[0015] 1. Simplify the external primary and secondary side terminals of the tester. You only need to connect the external primary side terminals A, B, and C and the secondary side terminals A, B, and C to perform test measurements, reducing wiring complexity.

[0016] 2. Only simple button operation is required to complete the rapid test of the wiring group and polarity of power transformers of different specifications and models, which greatly improves the test efficiency and effectively improves the applicability of the test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the electrical schematic diagram of the portable power transformer wiring group and polarity tester of the utility model;

[0018] Figure 2 Table 1-2 for the identification of the wiring groups of portable power transformers and polarity testers of this utility model;

[0019] Figure 3 Table 3-4 shows the wiring group classification of the portable power transformer and the polarity tester of the utility model.

[0020] In the figure: 1. Self-reset button SB1; 2. Self-reset button SB2; 3. Self-reset button SB 3 ; 4. Self-locking button SB4; 5. Self-locking button SB 5 ; 6. Self-locking button SB 6 ; 7. Switch; 8. Power supply; 9. DC millivoltmeter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model provides Figure 1-Figure 3 A portable power transformer wiring group and polarity tester is shown, comprising a housing, electrical components, and a tester. The electrical components include a primary-side self-reset button, a secondary-side self-locking button, a switch, a power supply, and a DC millivoltmeter. The primary-side self-reset buttons include self-reset button SB1, self-reset button SB2, and self-reset button SB3, and the secondary-side self-locking buttons include self-locking button SB4, self-locking button SB5, and self-locking button SB6.

[0023] The self-reset button SB1, self-reset button SB2, self-reset button SB3, self-locking button SB4, self-locking button SB5, and self-locking button SB6 each provide two pairs of normally open contacts;

[0024] The power supply is two 1.5V dry batteries;

[0025] The specific connection methods and effects are as follows:

[0026] The tester provides wiring terminals. The external primary-side wiring terminals of the tester include terminal A phase, terminal B phase, and terminal C phase. The primary-side terminals A phase and B phase are connected to the positive and negative poles of the power supply via the self-reset button SB1 and the switch, respectively, to control the amount of electricity applied to the primary-side A phase and B phase windings. The primary-side terminals B phase and C phase are connected to the positive and negative poles of the power supply via the self-reset button SB2 and the switch, respectively, to control the amount of electricity applied to the primary-side B phase and C phase windings. The primary-side terminals A phase and C phase are connected to the positive and negative poles of the power supply via the self-reset button SB3 and the switch, respectively, to control the amount of electricity applied to the primary-side A phase and C phase windings.

[0027] The external secondary side wiring terminals of the tester include terminal a phase, terminal b phase, and terminal c phase. The secondary side terminals a phase and b phase are connected to the positive and negative poles of a DC millivoltmeter respectively via the self-locking button SB4. According to the swing position of the DC millivoltmeter pointer, the polarity of the selected primary winding and the secondary winding ab phase is distinguished. The secondary side terminals b phase and c phase are connected to the positive and negative poles of a DC millivoltmeter respectively via the self-locking button SB5. According to the swing position of the DC millivoltmeter pointer, the polarity of the selected primary winding and the secondary winding bc phase is distinguished. The secondary side terminals a phase and c phase are connected to the positive and negative poles of a DC millivoltmeter respectively via the self-locking button SB6. According to the swing position of the DC millivoltmeter pointer, the polarity of the selected primary winding and the secondary winding ac phase is distinguished.

[0028] The tester provides three-phase wiring terminals to realize polarity and group measurement of single-phase two-winding transformers and three-phase two-winding transformers to meet the testing requirements of power transformers of different specifications and models. By selecting different self-reset buttons SB1, SB2, and SB3 on the primary side and self-locking buttons SB4, SB5, and SB6 on the secondary side, and comparing them with the wiring group identification table, polarity and group testing can be completed.

[0029] The portable power transformer wiring group and polarity tester test method includes the following steps:

[0030] S1: Fully discharge each winding of the transformer under test to the ground;

[0031] S2: Check the tester's self-reset buttons SB1, SB2, and SB3 and self-locking buttons SB4, SB5, and SB6 and then disconnect them;

[0032] S3: The primary side A, B, and C phases of the terminals are reliably connected to the primary side A, B, and C phases of the transformer under test, respectively. The secondary side a, b, and c phases of the terminals are reliably connected to the secondary side a, b, and c phases of the transformer under test, respectively.

[0033] S4: Connect the dry battery to the positive and negative poles of the power supply correctly and press the switch; self-reset button SB1, self-reset button SB2, self-reset button SB3, self-locking button SB4, self-locking button SB5, self-locking button SB6;

[0034] S5: Press the self-locking button SB4 and the self-reset button SB1, and observe the swing direction of the DC millivoltmeter at the same time. The positive bias is represented by "+", the negative bias is represented by "-", and no bias is represented by "0". Complete the ab relative to AB phase polarity measurement and record the data. Release the self-reset button SB1. Repeat the above steps, press and release the self-reset button SB2 and the self-reset button SB3 respectively, complete the ab relative to BC phase and AC phase polarity test, record the data, and release the self-locking button SB4;

[0035] S6: Repeat the above operation for the self-locking button SB5 according to step S5 to complete the measurement of the polarity of the AB phase, BC phase, and AC phase of the bc phase and record the data, and release the self-locking button SB5;

[0036] S7: Repeat the above operation for the self-locking button SB6 according to step S5 to complete the measurement of the polarity of the AB phase, BC phase, and AC phase of the ac phase and record the data, then release the self-locking button SB6;

[0037] S8: Measurement completed, disconnect switch (7);

[0038] S9: Compare the recorded data table with Figure 2 Compare and determine the wiring group of the tested transformer.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable power transformer wiring group and polarity tester, comprising a housing, electrical components, and a tester, characterized in that: The electrical components include a primary-side self-reset button, a secondary-side self-locking button, a switch, a power supply, and a DC millivoltmeter. The primary-side self-reset button includes a self-reset button SB1, a self-reset button SB2, and a self-reset button SB3. The secondary-side self-locking button includes a self-locking button SB4, a self-locking button SB5, and a self-locking button SB6. The tester provides wiring terminals. The external primary-side wiring terminals of the tester include terminals A-phase, B-phase, and C-phase. The primary-side terminals A-phase and B-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB1 and the switch. The primary-side terminals B-phase and C-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB2 and the switch. The primary-side terminals A-phase and C-phase are connected to the positive and negative poles of the power supply respectively through the self-reset button SB3 and the switch. The external secondary side wiring terminals of the tester include terminal a phase, terminal b phase, and terminal c phase. The secondary side terminals a phase and b phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB4, the secondary side terminals b phase and c phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB5, and the secondary side terminals a phase and c phase are respectively connected to the positive and negative poles of the DC millivoltmeter through the self-locking button SB6.

2. The portable power transformer wiring group and polarity tester according to claim 1, characterized in that: The self-reset button SB1, the self-reset button SB2, the self-reset button SB3, the self-locking button SB4, the self-locking button SB5, and the self-locking button SB6 respectively provide two pairs of normally open contacts.

3. The portable power transformer wiring group and polarity tester according to claim 1, characterized in that: The power supply is two 1.5V dry batteries.

4. The portable power transformer wiring group and polarity tester according to claim 1, characterized in that: The tester provides three-phase terminal blocks to realize polarity and group measurement of single-phase two-winding transformers and three-phase two-winding transformers, so as to meet the test requirements of power transformers of different specifications and models.

5. The portable power transformer wiring group and polarity tester according to claim 1, characterized in that: By selecting the primary side self-reset button SB1, self-reset button SB2, self-reset button SB3 and the secondary side self-locking button SB4, self-locking button SB5, self-locking button SB6, and comparing them with the wiring group identification table, the polarity and group test is completed.

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