H - Electricity – 02 – H
Patent
H - Electricity
02
H
317/11, 348/26
H02H 5/12 (2006.01) H02H 3/14 (2006.01)
Patent
CA 1301298
ABSTRACT FULL AUTOMATIC ELECTRIC SHOCK PROTECTOR APPARATUS A full automatic electric shock protector apparatus, comprises a contact (CJo) means for separating said contact automatically, means (7) for detecting the current passing through said contact with respect to the ground, means for analyzing the frequency of said current with respect to the ground for discrimination, after that the frequency of said current with respect to the ground is different to that of the power supply has been detected, and the electric shock current of the human body reaches a predetermined value, said contact is separated automatically. The means for analysing includes an amplifier (1), a filter (2) for the frequency of the power supply, means for producing positive half-cycle electric shock operation signal 3 and means for producing negative half-cycle electric shock operation signal, and an OR logic gate 5. Low electric shock current can be detected under the presence of the great change leakage current for protection. Also means for producing leakage operation signal and means for producing leakage abrupt change operation signal can also be provided.
553912
Chen Cezhan
Ogilvy Renault
LandOfFree
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