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1. (WO2018132324) CIRCUIT INTERRUPTER INCLUDING ELECTRONIC TRIP UNIT AND METHOD OF DETERMINING ELAPSED TIME OF START-UP PROCESS

Pub. No.:    WO/2018/132324    International Application No.:    PCT/US2018/012725
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Tue Jan 09 00:59:59 CET 2018
IPC: H02H 1/00
H02H 1/06
H02H 3/00
Applicants: EATON CORPORATION
Inventors: HOSKO, Daniel A.
MILLER, Theodore J.
GAO, Zhi
SHVACH, Randy P.
Title: CIRCUIT INTERRUPTER INCLUDING ELECTRONIC TRIP UNIT AND METHOD OF DETERMINING ELAPSED TIME OF START-UP PROCESS
Abstract:
A circuit interrupter (10) includes an electronic trip unit (40) structured to receive power from a power supply (15). The electronic trip unit includes a start-up process and is structured to proceed through the start-up process when the electronic trip unit begins receiving power from the power supply and a timing circuit (70) including a capacitor (72) structured to begin charging when the electronic trip unit begins receiving power from the power supply. The electronic trip unit includes a processor (60) that is structured to read a voltage across the capacitor when the start-up process has completed and to determine an elapsed time of the start-up process based on the read voltage across the capacitor.