H - Electricity – 01 – T
Patent
H - Electricity
01
T
317/25
H01T 4/10 (2006.01) H02H 9/06 (2006.01) H04M 3/18 (2006.01)
Patent
CA 2011170
25307-234 ABSTRACT OF THE DISCLOSURE The present invention relates to a surge protector for suppressing a surge voltage generated on transmission lines. The surge protector of the present invention has a first suppressor comprising a penta-electrode discharge tube having first positive and negative electrodes and second positive and negative electrodes, any one of which is operatively connected to first input terminals and to a grounded grid electrode. A switch is provided one end of which is operatively connected to the first positive electrode or negative electrode and the other end to said second input elec- trode. Also provided is an ON-OFF switch control which is operatively connected to the second positive and negative terminals to control the ON-OFF operations of the switch. Finally, there is included a second suppressor comprising first and second resistors connected respectively in series to the transmission lines and a metal oxide varistor which is connected in parallel with the transmission lines to suppress a surge voltage by convert- ing it into heat. The invention prevents system shut-down by grounding detected by terminal equipment at the time of suppressing a surge.
Fetherstonhaugh & Co.
Fujitsu Limited
Motoori Hideyuki
LandOfFree
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