Protector unit

Details Protector unit Protector unit

1997-12-01

1999-11-23

Sherry, Michael J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 939, 361106, 361119, H02H 300

Patent

active

059911360

ABSTRACT:
A protector unit for use in retrofitting connector blocks, such as a 300-type connector block or a C-50 frame includes a housing; a back-up, fail-safe assembly for providing a connection to ground; and a positive temperature coefficient limiter ("PTCR") for temporarily preventing the passage of current through the protector unit when an over-current condition is detected and for allowing the passage of current through the protector unit when the over-current condition is no longer detected. The back-up, fail-safe assembly permanently prevents the passage of current through the protector unit when a sustained over-current condition is detected.

REFERENCES:
patent: 3755715 (1973-08-01), Klayum et al.
patent: 5195015 (1993-03-01), Kaczmarek
patent: 5341270 (1994-08-01), Kaczmarek

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