Electrical switches comprising arrangement of mechanical switche

Details Electrical switches comprising arrangement of mechanical switche Electrical switches comprising arrangement of mechanical switche

1995-11-29

1998-04-07

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 9, 361 58, H02H 300

Patent

active

057371601

ABSTRACT:
An electrical switch arrangement, comprising a first mechanical switch, a second mechanical switch and a PTC device, with (a) the PTC device and second switch connected in parallel and the parallel combination connected in series with the first switch, or (b) the PTC device and first switch connected in series and the series combination connected in parallel with the second switch. The arrangement can interrupt a current and voltage higher than the rated currents and voltages of each of the switches and the PTC devices. The parallel switch can be rated to interrupt the rated interrupt current of the electrical switch arrangement at a voltage below the rated voltage of the electrical switch arrangement, and the series switch can be rated to interrupt a current below the rated interrupt current of the electrical switch arrangement at the rated voltage of the electrical switch arrangement.

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