The rail mill is operated by three-phase induction motors of from 2000 to 6000 horse-power capacity.
They are three-phase machines, delivering twenty-five cycle alternating currents at an effective potential of 11,000 volts.
The result produced by three such coils is called a three-phase current.
The round dial instrument shown at the bottom of each row of instruments is a three-phase recording wattmeter.
These tests were made with three-phase current of sixty cycles per second.
It will be seen, therefore, that by doubling the three-phase system the pulsations are already very greatly reduced.
Each of the towers on the line to Toronto carries two three-phase circuits, and the least distance between cables is six feet.
If the current in coil A (fig. 41) is flowing away from the centre, and has its maximum value, the three-phase alternators.
The theory of progressive distress fits convincingly into the scheme of the Hegelian three-phase dialectic.
Two-phase of three-phase currents would give two or three positive impulses during this time.