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Correct use of DC resistance tester

time:2020/10/2   source:华天电力  reading:221 time

The DC resistance tester is a new instrument designed to measure the DC resistance of large-capacity transformers. It is composed of a high-precision stable current power supply and a test part designed into one. The test process is controlled by a microcomputer, which automatically completes the steady current judgment, data acquisition and processing, and resistance value display. And printing; DC resistance tester can be used alone, so that the test current can reach 20A, 40A. It is an ideal test instrument for power generation and power supply units, transformer manufacturing industries and large and medium-sized power users to ensure safe production and improve product quality.


Transformer DC Winding Resistance Tester.png


The necessary protective measures should be taken during the use of the DC resistance tester to ensure the safety of the operators. On the other hand, it can effectively extend the service life of the equipment. Be sure to read this manual carefully before using the DC resistance tester. The operator should have common sense in the use of general electrical equipment or instruments; the DC resistance tester can be used indoors and outdoors, but it should be protected from rain, excessive dust, corrosive gases, Use in places such as direct sunlight; the DC resistance tester should avoid violent vibration. During the test, it is prohibited to move the test clamp and the power supply line.


DC resistance tester is an indispensable test item after transformer handover, overhaul and tap changer change. Under normal circumstances, using traditional methods to measure the DC resistance of transformer windings and high-power inductance equipment is a time-consuming and labor-intensive task. In order to change this situation, shorten the measurement time and reduce the workload of testers, the DC developed The resistance fast tester, with a high-speed microcontroller as the core, built-in rechargeable battery and charging circuit, achieves very good measurement results and highly automated measurement functions.


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