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Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

How to adjust the non-load tap changer of the transformer

The load-free tap changer of the transformer is usually composed of a moving contact piece, a fixed contact head and a transmission mechanism. When adjusting the position of the tap-changer, the box is covered by a manual mechanism. The no-load tap changer must be disconnected from the power grid on both sides of the transformer high and low voltage to be adjusted.

When the transformer overhaul or need to adjust the pressure should be divided into the switch between the pros and cons of not less than 4 laps, equivalent to each fixed contact with the contact head of not less than 4 times in order to eliminate the contact oil and oxide film, to ensure that the operation of good contact.

When the transformer is repaired, the switch should be placed in the first position, and the operating structure will be put to the first position. Then the lever is hit on the switch connector before the fixed operating structure, the entire operating structure clockwise rotation, such as the rotation angle within 90 degrees, it is shown that the operating structure has been connected with the switch, and then the entire operating structure to the operating position, with bolts to the entire operating structure fixed on the box cover flange.

After adjusting the switch, the DC resistance and the ratio of each position should be measured, and the transformer can be put into operation in accordance with the original data.

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