Publication: The Electrical Engineer
New York, NY, United States
WAGNER AND SCHWEDTMANN'S TRANSFORMER CUT-OUT AND INSULATOR.
FUSIBLE cut-outs for the primary circuits of converters are usually placed on a convenient support near the transformer, and sometimes on the transformer box; but the wires coming from the supply-mains are always supported by separate brackets carrying porcelain or glass insulators, and attached to the wall or support near the transformer. The wires cannot be led directly from the transformer to the supply-mains, as their weight and the strain of the wires would pull them out of the coils. To avoid the expense and inconvenience of thus supporting these devices separately, Messrs. H. A. Wagner and F. Schwedtmann, of St. Louis, have devised a means by which they may all be combined.
The arrangement intended for this purpose is illustrated in the accompanying engraving. Each fuse cut-out consists of an outer metal shell or holder h and an inner shell of non-conducting material i inclosing a removable core k, also of non-conducting material, and carrying a fusible metal strip f. The wires w leading from the primary coil c of the transformer are connected with the terminals l of the fuses f, and make electrical connection through the fuses with the wires m passing out through the insulating bushings n to the insulators G, from whence they are led to the supply-mains.
By the construction adopted, the strain of the wires leading to the supply mains is taken up entirely by the insulators.