Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1991-11-29
1995-10-31
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
361 91, 361111, 361127, H02H 904
Patent
active
RE0350770
ABSTRACT:
An adapter to be plugged in between a conventional watt-hour meter and an electrical power use installation socket to protect both the meter and downstream equipment from possible damage by transient surges in electrical potential resulting from lightning or similar disturbance. For the usual meter having a pair of power input terminals and a pair of power output terminals, this adapter has a pair of varistors or similar non-linear resistances connected between the respective input terminals and ground, so as to conduct away such surges. It also preferably has a heat sink connected to the grounded side of the varistors to dissipate the thermal energy resulting from the surge conduction. Additional features include an indicator of operating condition and fuse links to the varistors.
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