In circuits operating with small steady currents which themselves are unable to ignite or sustain any arc, transient arcing may nevertheless appear during switching operations, and may produce a detrimental wear when frequently repeated. These transients appear when their current supply is dependent on capacities and inductances, the energies of which are soon consumed by the discharges. An extended investigation of transients in telephone switching circuits was published by Curtis [1]
Fig. (52.01)

A series of discharge transients in the gap of a relay, each beginning as a glow at about 300 V, immediately developing to an arc. After the second, fourth and fifth arc, reignition occurred during the reversed phase of the electric oscillation in the leads. Figs. (52.01) to (52.04) due to Curtis [1].

in 1940. His description is clear and concise and for details the reader is referred to his article. Figs. (52.01 to 52.04) are due to Curtis. They represent typical appearances of so-called discharge transients.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1958

Authors and Affiliations

  • Ragnar Holm
    • 1
  1. 1.St. MarysUSA

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