Assemblies of PTC circuit protection devices

Details Assemblies of PTC circuit protection devices Assemblies of PTC circuit protection devices

1988-07-15

1990-10-30

Griffin, Donald A.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

219553, H02H 902, H05B 312

Patent

active

049671766

ABSTRACT:
A device assembly in which a plurality of PTC circuit protection devices are connected in series. Assemblies of this type are useful in providing protection under voltage conditions which would be unsafe for an individual protection device. In a preferred system the device assembly is connected in series with a circuit breaker.

REFERENCES:
patent: 4017715 (1977-04-01), Whitney et al.
patent: 4177376 (1979-12-01), Horsma et al.
patent: 4246468 (1981-01-01), Horsma
patent: 4329726 (1982-05-01), Middleman et al.
patent: 4346424 (1982-08-01), Hansen
patent: 4421582 (1983-12-01), Horsma et al.
patent: 4574188 (1986-03-01), Midgley et al.
patent: 4764663 (1988-08-01), Scott
"A General Approach to Circuit Design With PolySwitch.RTM. Devices", 1987 Raychem Corporation.
"Protection of Subscriber Line Interface Circuits With PolySwitch.RTM. Devices", 1987 Raychem Corporation.
"Protection of PBX and Key Telephone Systems With PolySwitch Devices", 1987 Raychem Corporation.
"Protection of Loudspeakers With PolySwitch.RTM. Devices", 1987 Raychem Corporation.
"Protection of Telecommunications Networks With PolySwitch Devices", 1987 Raychem Corporation.
"Protection of Batteries With PolySwitch Devices", 1987 Raychem Corporation.

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