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current limiting device [1 record]

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Record 1 2001-11-28

English

Subject field(s)
  • Electrical Power Supply
  • Electric Currents
CONT

The enormous current generated during a short circuit produces damaging heat at a much faster rate than can be safely dispersed. Interrupt the current and you stop adding heat to the system. Time is a critical determinant of the amount of heat (energy) added. An electrical short that lasts three cycles, for example, adds six times the energy of one lasting just one-half cycle. It's in this sense that all circuit breakers and fuses "limit" current. Add a current limiting device, i.e. ususally a fuse, but sometimes a circuit breaker and fuse in series, that restricts the fault current to a value less than the starter's short-circuit withstand rating.

French

Domaine(s)
  • Alimentation (Distribution électrique)
  • Courants (Électrocinétique)

Spanish

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