Italian translation: passaggio per il punto zero della corrente
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English to Italian translations [PRO] Tech/Engineering - Electronics / Elect Eng / circuit breakers
English term or phrase:current zero passage
The breaking principle
On opening, the puffer cylinder is drawn downwards over the fixed piston and the enclosed gas is compressed and forced at a high velocity out through the nozzle and the moving arcing contact.
When the arcing contacts are separated, an arc is produced which at high currents obstructs the nozzle.
When the current approaches the current zero passage, the gas starts to flow out through the puffer cylinder. The specially designed nozzle ensures that the gas flow is directed towards the arc.