2. Technological constraints
2.1 Contact
In high-voltage circuit-breakers, with the exception of vacuum bulbs, it is necessary to distinguish between the functions of continuous current flow and arcing point (figure 7 ).
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Permanent (or main) current-carrying contacts are known as sliding contacts, because they ensure permanent contact between a fixed conductor and a moving conductor.
For these contacts, which are permanently carrying the rated current (permanent contacts), we generally use copper parts electroplated with silver. Since silver oxide is a relatively...
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Technological constraints
Warm-ups
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