Electrical protective devices and methods of assembling

Details Electrical protective devices and methods of assembling Electrical protective devices and methods of assembling

H - Electricity

02

H

26/112, 317/12.4

H02H 9/06 (2006.01) H01H 71/20 (2006.01) H01T 1/00 (2006.01) H01T 1/14 (2006.01) H01T 4/06 (2006.01)

Patent

CA 1199364

-32- ELECTRICAL PROTECTIVE DEVICES AND METHODS OF ASSEMBLING Abstract A protector module for protecting tip and ring conductors of a telephone loop includes a pair of protector assemblies which are supported within a common housing. A voltage protection subassembly of each protector assembly is connected electrically to a grounding subassembly for causing current associated with excessive voltage surges to be conducted to ground. Each protector assembly also includes a current protection subassembly which comprises a dielectric base and a line pin and a central office pin with the line and central office pins being connected together electrically to establish electrical contact between a conductor of the circuit and its protector assembly. A shunting element is disposed concentrically about the line pin and is releasably secured to one end of the line pin in an initial position by a fusible bonding material. A spring between a cup of the voltage protection subassembly and the housing maintains the voltage protection subassembly in engagement with the shunting element. Also, the spring is effective when current flow exceeds a predetermined level that is sufficient to melt the fusible bonding material to cause the shunting element to be moved to a position where it engages a portion of the grounding subassembly to establish a fault current path to ground. For a prolonged voltage surge, heat energy is transferred from the voltage protections subassembly to the shunting element and melts the fusible bonding material to allow the shunting element to be moved as in a current overload mode.

427896

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