H - Electricity – 01 – C
Patent
H - Electricity
01
C
348/14, 317/24
H01C 8/04 (2006.01) H02H 3/04 (2006.01) H02H 3/22 (2006.01) H02H 9/04 (2006.01)
Patent
CA 2012854
Surge suppression is provided by varistors connected between, respectively, hot and neutral conductors and hot and ground conductors, each through a common fuse that avoids hazardous overvoltages on the varistors. A first indicator circuit portion provides an indication that the power is on and surge protection is present and includes a first indicator device such as a green light-emitting diode that is energized when the fuse is intact, and a second indicator circuit portion is provided for indicating power is on and surge protection is lacking that includes a second indicator device such as a red light-emitting diode that is energized by the line conductors when the fuse has been interrupted. The surge suppressor and dual indicator apparatus can be contained within a wiring device such as a receptacle. A single varistor unit containing two varistor disks with three leads, including a center tap, allows three effective surge suppressor circuit branches in a compact configuration.
Misencik John Joseph
Wiley Roy Oliver
Hubbell Incorporated
Riches Mckenzie & Herbert Llp
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