Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1991-03-14
1992-12-08
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
H02H 308
Patent
active
051703092
ABSTRACT:
In a four-pole circuit breaker having U, V, W and N poles for protection of corresponding phases, only an N phase signal, which is reproduced by a current signal reproducing circuit in response to a current flowing through an N phase line, is amplified by a rated current reducing circuit and supplied to a maximum phase signal selection circuit together with other phase signals.
REFERENCES:
patent: 4589052 (1986-05-01), Dougherty
patent: 4685024 (1987-08-01), Martellock et al.
patent: 4819124 (1989-04-01), Arinobu
patent: 4827369 (1989-05-01), Saletta et al.
Arinobu Ichiro
Hirotsune Kouji
Ishii Kazuhiro
Sato Kazushi
Mitsubishi Denki & Kabushiki Kaisha
Pellinen A. D.
Schultz C.
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