Apparatus and method for protecting equipment against electrical

Details Apparatus and method for protecting equipment against electrical Apparatus and method for protecting equipment against electrical

1995-11-01

1997-10-07

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361111, H02H 100

Patent

active

056754680

ABSTRACT:
Apparatus and method for protecting equipment against electrical power surges which is not `ground-centered`. A protection circuit in accordance with this invention comprises at least (a) two input terminals, (b) two fuses in series respectively, (c) a triac which is over-current activated and connected at outputs of the fuses, (d) an over-current sensor in series between one of the fuses and an output terminal, to activate the triac, and (e) a static potential limiter which is overvoltage activated and connected between the triac and a ground terminal. Each fuse is appropriately rated to blow before the activated triac or the activated static potential limiter of the protection circuit are destroyed.

REFERENCES:
patent: 4849846 (1989-07-01), Hung et al.
patent: 5341269 (1994-08-01), Hayward et al.
patent: 5428494 (1995-06-01), Ahuja

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