Electrical switching apparatus including a second trip circuit responding to failure of a first trip circuit to provide a repetitive signal
RT Elms - US Patent 7,486,492, 2009 - Google Patents
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ww OPERATING.......... N.,.....
4,081,852 A 3/1978 Coley et al. 4,351,013 A 9, 1982 Matsko et al. 4.412, 193 A 10, 1983
Bienwald et al. 4,539,618 A 9, 1985 Stich 4,568,997 A 2f1986 Bienwald et al. 5,202,662 A 4,
1993 Bienwald et al. 5,224,006 A 6, 1993 MacKenzie et al. 5,260,676 A 11/1993 Patel et al.
5,293,522 A 3, 1994 Fello et al. 5,311,392 A 5/1994 Kinney et al. st CIRCUT GROUND 94 w
ww OPERATING.......... N.,.....
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