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Precautions for using transformer winding

time:2020/9/10   source:华天电力  reading:270 time

The DC resistance test of the transformer windings is an indispensable test item after the transformer is handed over, overhauled and tap changer changed. Under normal circumstances, using traditional methods (bridge method and voltage drop method) to measure the DC resistance of transformer windings and high-power inductive 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 most commonly used test equipment is the DC resistance fast tester. It adopts brand-new power supply technology, which has the characteristics of rapid measurement, small size, light weight, convenient use, high measurement accuracy, and large output current. Automatically complete self-check, data processing, data display, and have automatic discharge and discharge indication functions. It is an ideal device for measuring the DC resistance of transformer windings and high-power inductance equipment. What problems should be paid attention to when using the transformer DC resistance tester?


Transformer DC Winding Resistance Tester.png


1. Be sure to read this manual carefully before using this instrument.


2. After measuring the inductive load, the test line cannot be directly removed, so as not to endanger the safety of testers and equipment due to inductive discharge. The output terminal of this machine is equipped with a discharge circuit. When the output is turned off, the inductance will discharge energy through the instrument. The test line must be removed after the discharge instruction is completed.


3. For the no-load voltage regulating winding, it is not allowed to switch the no-load tap changer during the test or when the power is not discharged.


4. During the test, it is forbidden to move the test clamp and the power supply line.


5. During the test, when the external AC220V is suddenly cut off, the instrument will start to discharge automatically. At this time, it is not allowed to remove the test wire immediately, and wait at least 1 minute before removing the wire.


6. The maintenance, care and adjustment of the instrument should be carried out by professionals.

To


7. This instrument can be used indoors and outdoors, but it should be used in places such as rain, corrosive gas, excessive dust, high temperature, and direct sunlight.


 8. Use when debugging the communication port


Note: After measuring the inductive load, the test line cannot be directly removed, so as not to endanger the safety of testers and equipment due to inductive discharge. The output terminal of this machine is equipped with a discharge circuit. When the output is turned off, the inductor discharges energy through it. The test wire must be removed after the discharge instruction is completed.


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