Four-star voltage transformer secondary polarity intelligent tester

Abstract

The invention provides an intelligent tester for secondary polarities of four-star voltage transformers. The intelligent tester comprises a primary-side device, a secondary-side device and a power module. The primary-side device comprises a voltage generating circuit, a controller, a signal conditioning circuit and a first wireless communication module; the voltage generating circuit, the first wireless communication module and the signal conditioning circuit are electrically connected with the controller by signals; the secondary-side device comprises a voltage acquisition and conversion circuit, an information processor, a liquid crystal display, a second wireless communication module and a keyboard; the voltage acquisition and conversion circuit, the liquid crystal display, the second wireless communication module and the keyboard are electrically connected with the information processor by signals; the first wireless communication module and the second wireless communication module are in wireless communication connection with each other. The intelligent tester has the advantages that whether secondary-side wiring of the four-star voltage transformers is correct or not and error types of secondary-side wiring of the four-star voltage transformers can be automatically judged by the aid of the intelligent tester and can be tested quickly and accurately, accordingly, the intelligent tester is convenient to operate, visual display effects can be realized, the work efficiency can be greatly improved, and potential safety hazards can be reduced.

Description

technical field

[0001] The invention relates to a detection device for a voltage transformer in a power supply system, in particular to an intelligent tester for testing whether the polarity of a secondary circuit of a four-star voltage transformer is correct or not. Background technique

[0002] In the 10kV system of the power supply network, in order to eliminate the adverse effect of ferromagnetic resonance on the voltage transformer, the three-phase four-star voltage transformer (referred to as three-phase four PT) has been widely used. The wiring method in the application is as follows: Figure 4 shown. Before the voltage transformer is put into operation, the correctness of the secondary polarity of the voltage transformer must be tested to ensure that its secondary wiring is correct, otherwise it will cause problems such as malfunction of the protection device and directly affect the safe and stable operation of the power system . For the test of the polarity correct...

Examples

Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] See figure 1 , The four-star voltage transformer secondary polarity intelligent tester of this embodiment is mainly composed of a primary side device 1, a secondary side device 2 and a power module. The power module is in figure 1 Not shown in the figure, the power module has a power output terminal; the power output terminal of the power module outputs +5V direct current, which is used as the working power of the system.

[0021] The primary device 1 is mainly composed of a voltage generating circuit 11 , a controller 12 , a first wireless communication module 13 and a signal conditioning circuit 14 . The voltage generating circuit 11 is provided with a voltage input terminal, a voltage output terminal, a drive signal input terminal and a power supply terminal; the controller 12 is provided with a first signal input termin...

technical field

[0001] The invention relates to a detection device for a voltage transformer in a power supply system, in particular to an intelligent tester for testing whether the polarity of a secondary circuit of a four-star voltage transformer is correct or not. Background technique

[0002] In the 10kV system of the power supply network, in order to eliminate the adverse effect of ferromagnetic resonance on the voltage transformer, the three-phase four-star voltage transformer (referred to as three-phase four PT) has been widely used. The wiring method in the application is as follows: Figure 4 shown. Before the voltage transformer is put into operation, the correctness of the secondary polarity of the voltage transformer must be tested to ensure that its secondary wiring is correct, otherwise it will cause problems such as malfunction of the protection device and directly affect the safe and stable operation of the power system . For the test of the polarity correct...

Examples

Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] See figure 1 , The four-star voltage transformer secondary polarity intelligent tester of this embodiment is mainly composed of a primary side device 1, a secondary side device 2 and a power module. The power module is in figure 1 Not shown in the figure, the power module has a power output terminal; the power output terminal of the power module outputs +5V direct current, which is used as the working power of the system.

[0021] The primary device 1 is mainly composed of a voltage generating circuit 11 , a controller 12 , a first wireless communication module 13 and a signal conditioning circuit 14 . The voltage generating circuit 11 is provided with a voltage input terminal, a voltage output terminal, a drive signal input terminal and a power supply terminal; the controller 12 is provided with a first signal input termin...

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