H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 9/04 (2006.01) H01C 7/12 (2006.01) H04M 1/738 (2006.01)
Patent
CA 2643229
A hybrid surge protector for a network interface device (NID) is disclosed. The hybrid surge protector includes a fail-safe spring connected to the ground electrode of a three-electrode gas tube. Tabs on the fail-safe spring are held away from the gas-tube end electrodes by a fusible element. The hybrid surge protector also includes metal--oxide varistor elements ("MOVs") in contact with the gas-tube end electrodes and with the ground electrode via an MOV spring. This arrangement provides for two initial paths to ground-one path from the gas-tube end electrodes to the ground electrode through the gas tube, and another from the gas-tube end electrodes to the ground electrode through the MOVs and the MOV spring. The dominant path to ground starts as the MOV ground path but switches to the gas-tube path as the gas tube becomes activated. Another path to ground via the fail-safe spring is also available should the gas tube overheat. A surge protection module that includes the hybrid surge protector is also disclosed.
Arnold Sean Matthew
Brower Boyd Grant
Harrison Carl Randall
Napiorkowski John Joseph
Tenholder Rodger Alan
Corning Cable Systems Llc
Gowling Lafleur Henderson Llp
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