Alternating Current Signaling (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from Alternating Current Signaling

Many aitravagant claims have been made for alternating current signaling. Most of which. Happily. It has been able to met. It is only fair to state. However. That there are certain section! Of the country where the cost of power is relatively high and where. Consequently. An alternating current signal system might not be as economical as a direct current installa tion with batteries; such cases are rare and are gradually dis appearing as the country develops and commercial power be comes more and more available. Furthermore. The initial cost of an A. C. System will. In most cases be greater than that of an equivalent D. C. System. But this is generally more than conipensated for by the saving in maintenance and power. So that the alternating current system pays for itself in a longer or shorter time. Depending on local conditions. And there is thereafter a constant saving.

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