The European edition of the dip and interruption test for equipment drawing more than 16 A per phase is used for the heavier industrial products placed on the European market, among them the large power drive systems, uninterruptible power supplies, welding equipment and process installations that are covered by the drive and machinery standards. Its distinguishing feature is practical rather than technical: the generator must deliver the full load current of the equipment while changing the applied voltage quickly and without distortion, so the test is performed only in laboratories equipped for high current work, and the impedance of the supply network has a material effect on the result. The European text reproduces the international levels, durations and phase relationships and carries the foreword and annex linking it to the directive. Where a product is intended for a weak network, the technical file usually justifies the chosen level from the short circuit capacity at the point of connection.