. Transactions. ains on connected apparatus, until the more or lesscomplex control switches had cleared the line. The rectifier cannot, of course, suppress a sustained short-circuit O. H. ESCHHOLZ 251 caused by complete breakdown in the treater chambers, or by contactof electrodes. Under such conditions, it operates to limit the currentuntil the circuit breakers open; this latter type of disturbance, however,occurs infrequently. Treater Voltage As shown in Fig. 8^ and particularly in Fig. 9,^ the treater voltageis practically a flat wave. These oscillograms are typical of manythat have been se
. Transactions. ains on connected apparatus, until the more or lesscomplex control switches had cleared the line. The rectifier cannot, of course, suppress a sustained short-circuit O. H. ESCHHOLZ 251 caused by complete breakdown in the treater chambers, or by contactof electrodes. Under such conditions, it operates to limit the currentuntil the circuit breakers open; this latter type of disturbance, however,occurs infrequently. Treater Voltage As shown in Fig. 8^ and particularly in Fig. 9,^ the treater voltageis practically a flat wave. These oscillograms are typical of manythat have been secured on treaters of different types and inability of most investigators to record the treater-voltage charac-teristic is attributed to the use of an oscillograph of low sensitivity,or to excessive leakage of line, insulator, and treater current. The os-cillograph, when connected as shown in Fig. 10, offers a discharge pathfor energy stored in the treater, and it is desirable, therefore, to use an. Fig. S. Fig. 9. Fig. 8.—Voltage across theater (cpper wave) and crRREXT through RECTIFIER GROrXD LEAD (lOWER WAVEJ IMMEDIATELY BEFORE AND AFTER SHORT-CIRCUIT IN TREATER CHAMBER. Time interval between wave peaks = H20 SEC. Fig. 9.—Showing sustained voltage across treater and rectifier groundcurrent during norm.\l operation. Peak voltage .57,000; effectlve treater voltage approximately 97 PER CENT. OF PEAK. EfFECTFVE RECTIFIER CURRENTAPPROXIMATELY 1 AMPERE. instrument that will respond to the smallest changes of current; other-wise the fluctuations in treater voltage appear greater than actuallyoccur during normal operation. In all of the treaters examined, theeffective voltage ranged from 90 to 97 per cent, of the maximum. Tocheck the oscillograph observations, comparisons of the actual effectiveand maximum voltages were secured by means of an electrostatic volt-meter and a sphere gap, the instruments having been calibrated togetheron a commercial sine-wave voltage.
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
