US 12,461,152 B2
Arc fault circuit interrupt tester and method
Bruce R. Kuhn, Naperville, IL (US); and Christian A. Castro, Deerfield, IL (US)
Assigned to Klein Tools, Inc., Lincolnshire, IL (US)
Appl. No. 17/426,533
Filed by Klein Tools, Inc., Lincolnshire, IL (US)
PCT Filed Jan. 29, 2019, PCT No. PCT/US2019/015590
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/159478, PCT Pub. Date Aug. 6, 2020.
Prior Publication US 2022/0091187 A1, Mar. 24, 2022
Int. Cl. G01R 31/327 (2006.01)
CPC G01R 31/3274 (2013.01) 8 Claims
OG exemplary drawing
 
1. An arc fault circuit interrupt (AFCI) tester device, comprising:
a housing;
a circuit assembly disposed within the housing and including:
a first load switching circuit for creating a pulse pattern having a plurality of pulses;
a second load switching circuit for creating an overlay signal superimposed upon at least one pulse of the plurality of pulses; and
an interface receiving the plurality of pulses and the overlay signal, the interface extending outside of the housing and adapted for electrically coupling the circuit assembly to an AFCI device under test (DUT), the interface adapted to transmit the pulse pattern and the overlay signal to the AFCI DUT;
wherein at least one pulse of the plurality of pulses has:
a pulse width that is less than a pulse width of at least one other pulse of the plurality of pulses; and
a pulse amplitude that is less than a pulse amplitude of the at least one other pulse.