Common alarm system for a plurality of circuit interrupters

Details Common alarm system for a plurality of circuit interrupters Common alarm system for a plurality of circuit interrupters

1994-05-10

1996-02-20

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 340639, 335 17, G08B 2100

Patent

active

054932785

ABSTRACT:
Apparatus for generating alarms for a group of circuit interrupters, especially those which respond to arcing faults, includes a device associated with each circuit interrupter providing an indication of a tripped condition and a common alarm generator which generates an alarm when any one, or at least any one of a number of selected circuit interrupters, is in the tripped condition. In one embodiment of the invention, switches indicating that associated circuit interrupters are tripped generate auxiliary trip signals on a common alarm bus. The auxiliary trip signals are latched by a latch on the common alarm bus which energizes a relay to activate a local and/or remote alarm. The latch is reset by a switch on the load center door. In another embodiment of the invention, an IR beam is blocked from reaching a photo-detector whenever a circuit interrupter handle is in the tripped position which also results in energization of a relay to actuate the common alarm. Selected circuit interrupters only can be alarmed by orienting the light beam such that only circuit interrupters selected by adding an extension to the handle block the beam when the associated circuit interrupter is tripped.

REFERENCES:
patent: 4081852 (1978-03-01), Coley et al.
patent: 4134112 (1979-01-01), Kercheval
patent: 4209761 (1980-06-01), Klein et al.
patent: 4358810 (1982-11-01), Wafer et al.
patent: 4706073 (1987-11-01), Vila Masot
patent: 4752853 (1988-06-01), Matsko et al.
patent: 4794356 (1988-12-01), Yun et al.
patent: 5138299 (1992-08-01), Patten et al.
patent: 5224006 (1993-06-01), Mackenzie et al.
patent: 5233330 (1993-08-01), Hase

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