Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1989-08-02
1992-05-19
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 50, 307118, H02H 316
Patent
active
051153670
ABSTRACT:
A protective device for portable apparatus supplied from a high-voltage line is disclosed, which includes a connecting line from an electrical supply. The device also includes a protective switch with contact sets located in the supply lines and pre-stressed contact springs which are maintained in a closed position by a hoop-like fusible wire. An electronic firing circuit is disposed on a flat plate, together with the protective switch and the connections to the supply line and to the apparatus. The two-pole outlet of the firing circuit terminates in contact lugs with which the ends of the fusible wire can be connected mechanically and electrically. The circuit plate is, preferably, seated in the housing of a right angle plug, the contact pins of which are cast or pressed into the bottom of the housing and support the circuit plate while, at the same time, their heads constitute the opposite contact for the contact springs of the protective switch.
REFERENCES:
patent: 4589047 (1986-05-01), Gaus et al.
patent: 4751603 (1988-06-01), Kwan
Gaus Harry
Gross Hagen
Schliebs Gunter
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