Multichannel direct-current resistor tester

Abstract

The invention provides a multichannel direct-current resistor tester. The multichannel direct-current resistor tester comprises a shell, wherein a processor is arranged in the shell; a signal acquisition circuit is connected with a first port of the processor, and the signal acquisition circuit is sued for acquiring voltage; a constant-current source circuit is connected with a second port of the processor, and the constant-current source current is used for providing constant current; a display output circuit is connected with a third port of the processor and used for displaying a measured resistance value; and a test mode of the direct-current resistor tester comprises a single-circuit resistor or a single-circuit inductance test mode, a single-direction high-low-voltage winding test mode, a single-side Y connection test mode, a single-direction YN connection test mode and a single-side angular connection test mode; therefore, since the direct-current resistor tester has five test modes, transformers of different connection modes can be tested, the measurement procedure is simple, the measurement time is greatly saved, and the working efficiency is increased.

Description

Technical field [0001] The invention relates to the technical field of DC resistance testing, in particular to a multi-channel DC resistance tester. Background technique [0002] The DC resistance test is an indispensable test item after the transformer is handed over, overhauled and tap changer changed. [0003] Under normal circumstances, the bridge method and voltage drop method are generally used to measure the DC resistance of transformer windings and high-power inductance equipment. However, different transformer wiring methods are different, and different test modes are required for testing. However, the existing DC resistance The test mode in the resistance tester is single. When testing the DC resistance of transformers with different wiring methods, it is necessary to replace the tester with different test modes, which results in a cumbersome test process and time-consuming and labor-intensive measurement. Summary of the invention [0004] In view of the problems existing...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a multi-channel DC resistance tester, which is used to solve the problems in the prior art when testing the DC resistance of transformers or high-power inductive devices with different wiring modes. Replacing the tester with different test modes, the measurement process is cumbersome and the technical problem is that the measurement efficiency is reduced

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