A method and by guidance arrangement for measuring the clamping force of transformer windings

摘要

For measuring the clamping force prevailing in the windings of a transformer which has windings mechanically clamped between clacks arranged in two clack rings which support the windings at their ends, clacks are provided forming columns of clacks in the windings over which the clamping force is to be measured. One of the clacks arranged in the clack rings is in contact with one of the outer clacks of each of the columns. One of the clacks in the clack ring is provided with a channel which opens into the area of contact between it and the column clack and to the outside. Liquid under pressure is supplied to this passage, and, when there is balance between the added pressure medium and the pressure medium leaking out in the area, the pressure is determined and a clamping force is derived from the measured pressure with the help of a calibration curve.