US 12,283,797 B2
Risk reduction of electrical hazards
Theodore R. Kuzniak, Essex (CA); James B. Erwied, Essex (CA); Michael H. Kramer, Oakville (CA); Gary J. Masse, LaSalle (CA); Todd R. Kuzniak, Belle River (CA); and Joseph E. Zaleski, LaSalle (CA)
Assigned to B.S.A.F.E. Manufacturing Incorporated, Oldcastle (CA)
Filed by B.S.A.F.E. Manufacturing Incorporated, Oldcastle (CA)
Filed on Nov. 29, 2021, as Appl. No. 17/536,719.
Application 17/536,719 is a continuation in part of application No. 16/734,841, filed on Jan. 6, 2020, granted, now 11,211,776.
Application 16/734,841 is a continuation of application No. 16/272,149, filed on Feb. 11, 2019, granted, now 10,530,133, issued on Jan. 7, 2020.
Application 16/272,149 is a continuation in part of application No. 15/444,717, filed on Feb. 28, 2017, granted, now 10,212,839, issued on Feb. 19, 2019.
Claims priority of provisional application 62/389,755, filed on Mar. 9, 2016.
Prior Publication US 2022/0085580 A1, Mar. 17, 2022
Int. Cl. H01H 9/22 (2006.01); G01R 31/327 (2006.01); G08B 3/10 (2006.01); H01H 9/26 (2006.01); H02B 1/30 (2006.01); H02B 1/44 (2006.01); G08B 21/18 (2006.01); H02B 1/42 (2006.01)
CPC H02B 1/306 (2013.01) [G01R 31/3275 (2013.01); G08B 3/10 (2013.01); H01H 9/22 (2013.01); H01H 9/26 (2013.01); H02B 1/30 (2013.01); H02B 1/44 (2013.01); G08B 21/185 (2013.01); H02B 1/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an enclosure comprising a door;
a power switch mounted inside said enclosure and configured to switch electrical power from a line-side power line to a load-side power line, wherein said load-side power line is configured to transfer said electrical power outside of said enclosure to an industrial control panel;
a controller coupled to said power switch and configured to determine a presence and an absence of each of a plurality of phases of said electric power on said load-side power line inside said enclosure; and
a detector coupled to said controller, wherein said detector has a switch accessible from external to said enclosure, has one or more lamps that are visible from external to said enclosure, and is configured to illuminate said one or more lamps indicating said absence of said electrical power on a corresponding one or more of said plurality of phases in response to a pressing of said switch.