. The Bell System technical journal . TIME IN MICROSECONDS Fig. 5 — Voltage across cleanpalladium contacts when a capac-itor charged to 400 volts is dis-charged through a resistor of 200ohms. The closure arc went out atthe minimum arc current 4001- o>. 0 5 10 TIME IN MICROSECONDS 778 THE BELL SYSTEM TECHNICAL JOURNAL, MAY 1957 Reference 8, Fig. 1). The minimum arc current is much lower for activecontacts than for inactive or clean contacts, and one can perhaps thinkof the decrease of the minimum aic current for noble metal contactsfrom a vahic of the order of 1 ampere for clean sur
. The Bell System technical journal . TIME IN MICROSECONDS Fig. 5 — Voltage across cleanpalladium contacts when a capac-itor charged to 400 volts is dis-charged through a resistor of 200ohms. The closure arc went out atthe minimum arc current 4001- o>. 0 5 10 TIME IN MICROSECONDS 778 THE BELL SYSTEM TECHNICAL JOURNAL, MAY 1957 Reference 8, Fig. 1). The minimum arc current is much lower for activecontacts than for inactive or clean contacts, and one can perhaps thinkof the decrease of the minimum aic current for noble metal contactsfrom a vahic of the order of 1 ampere for clean surfaces to ampereor less for active surfaces as the chief characteristic of activation. Erosion Active contacts of palladium and of silver transfer metal in cjuitedifferent ways. The transfer at active silver contacts is the more complex,and for this reason the transfer that occurs at acti\e palladium contacts 15 UO (a) LIMONENE AT 1 MM PRESSURE ANODE -T- CATHODE ••o- (b) NAPTHALENE AT ROOM TEMP J L .-O- 0 1,03 ARC TIME IN MICROSECONDS Fig. 6 — Results of measurement l)y weighing of the erosion of palladium elec-trodes produced by active arcs in limonene vapor (a) and in napthalene vapor(b). will be ta
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
