Improvements in or relating to arrangements for regulating the supply of current to high-current resistance furnaces to be fed with alternating current

摘要

821,816. Two-part couplings. SIEMENS PLANIAWERKE AKTIENGESELLSCHAFT FUR KOHLEFABRIKATE. May 23, 1958 [May 24, 1957], No. 16737/58. Class 38 (1). [Also in Group XXXV] A supply arrangement for heavy current resistance furnaces fed from an alternating current source RST comprises a " Scott " connected transformer, the two.secondary windings of which are connected in a series circuit together with a battery of condensers K and a winding of a further transformer, the remaining winding of which is arranged to be connected to the furnaces Wo1, Wox, the condensers K serving to compensate for the reactive current of the heating circuit of the furnace. The transformers comprising the supply arrangement are mounted on a vehicle movable along a track 1 which runs alongside a building containing furnaces Wol, Wox, the terminals K2 of which project through a wall W. Connecting members K1 are mounted on the transformer structure which members comprise elements 15, 16 urged together by springs 18 and opened by a cam 23 operated either by a motor or a lever 24. The input to the transformer structure and the connection to the condensers K is by way of bus-bars R, S, r, s, and switches 2, 3, 6, 7. When it is desired to supply a furnace, the structure is moved along the track 1, and the contact elements K1 closed on to the terminals K2 by suitable operation of the cam 23 the necessary input and condenser connections being made by closure of switches 2, 3, 6, 7. The ends of connecting elements Kl, K2 are silver plated.