US 7,199,587 B2 Apr. 3, 2007
(54) PORTABLE CIRCUIT INTERRUPTER TESTER AND METHOD
(76) Inventor: Maxim D. Hurwicz, 224 N. 4th St., Stillwater, MN (US) 55082
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 11/383,194
(22) Filed: May 12, 2006
(65) Prior Publication Data
US 2006/0209483 Al Sep. 21, 2006
Related U.S. Application Data
(63) Continuation of application No. 10/293,524, filed on Nov. 12, 2002, now Pat. No. 7,173,428.
(60) Provisional application No. 60/337,650, filed on Nov. 13, 2001.
(51) Int. CI.
G01R 31/327 (2006.01)
(52) U.S. CI 324/424
(58) Field of Classification Search 324/424,
324/508, 509, 536 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
A portable circuit interrupter shutoff testing device and method, including a high current switch controlled by a timing circuit that allows current to flow through the switch and a small series resistance (in order to trip the instantaneous-trip function of the interrupter, as opposed to the overload-trip) for a short time period relative to the sine wave of the electrical power. A button activates the timing circuit which in turn activates the switch and current flows limited by the internal resistor of the device. By limiting the on time of the device to one or a few half cycles, the user can test if the circuit interrupter responds as quickly as specified by the manufacturer. A method includes receiving a stimulation indication, and selectively connecting an electrical load to wires connected to the circuit interrupter, wherein the electrical load is sufficient to trigger the instantaneous-trip function of the circuit-interrupter.
21 Claims, 14 Drawing Sheets