H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 9/04 (2006.01) H01R 13/66 (2006.01) H02H 1/06 (2006.01)
Patent
CA 2080366
There is provided a circuit (10) that protects the electronic tripping circuitry (14) of a circuit breaker system from external transient high voltages and prolonged high voltage faults. The circuit (10) preferably includes a transzorb (24) that conducts in response to receiving a voltage signal having a magnitude greater than the breakdown voltage of the transzorb (24). This transzorb (24) clamps the output voltage to its breakdown voltage. The circuit (10) also includes a fuse (34) that is designed to blow in response to a prolonged high voltage fault.
Circuit (10) qui protège les circuits de déclenchement électroniques (14) d'un système disjoncteur contre les tensions élevées transitoires externes et les anomalies de tension élevée prolongée. Le circuit (10) comporte de préférence une iode Zener absorbant les transitoires (24) qui est conductrice en réponse à la réception d'un signal de tension présentant une valeur supérieure à la tension de claquage de ladite diode Zener (24). Cette dernière bloque la tension de sortie à sa tension de claquage. Le circuit (10) comprend également un fusible (34) destiné à fondre en réaction à une anomalie de tension élevée prolongée.
Haun Andy Allen
Tessmer Earl John
Fetherstonhaugh & Co.
Square D. Company
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