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1. (WO2017157288) CONTROL CIRCUIT AND HIGH FREQUENCY CIRCUIT BREAKER

Pub. No.:    WO/2017/157288    International Application No.:    PCT/CN2017/076671
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Wed Mar 15 00:59:59 CET 2017
IPC: H02H 3/16
H02H 3/08
Applicants: THE HONG KONG POLYTECHNIC UNIVERSITY
Inventors: CHENG, Ka Wai Eric
XUE, Xiangdang
Title: CONTROL CIRCUIT AND HIGH FREQUENCY CIRCUIT BREAKER
Abstract:
A high frequency circuit breaker (HFCB) and a control circuit for a HFCB are provided. The HFCB includes a control circuit, a sensing circuit and a power circuit. The sensing circuit senses at least one of a high frequency leakage current and a high frequency current passing through a load and the power circuit connects and disconnects power to the load. The control circuit includes an analog comparator and a switched state retention circuit. The analog comparator compares an output from the sensing circuit to a current reference and the switched state retention circuit provides a control signal to the power circuit based on an output from the analog comparator, to force the power circuit to selectively connect or disconnect power to the load.