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1. (WO2018158695) CIRCUIT FOR SWITCHING DIRECT CURRENT

Pub. No.:    WO/2018/158695    International Application No.:    PCT/IB2018/051266
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Thu Mar 01 00:59:59 CET 2018
IPC: H01H 7/08
H01H 43/00
H02H 3/093
H03K 17/08
Applicants: HUMAN, Neil
Inventors: HENDRICKS, Shaun Keith
Title: CIRCUIT FOR SWITCHING DIRECT CURRENT
Abstract:
A circuit is disclosed which has an input terminal for connection to a source of direct current (18) and has an output terminal for connection to a load (10). An electromechanical relay (16) has its contacts connected between the input and output terminals. A fast acting field effect transistor (22) has its source connected to the input terminal and its drain connected to the relay contacts. A voltage source comprising a pair of timers (24, 26) is connected to the gate of the transistor. The voltage of the source varies cyclically whereby, in use, the channel from the source to the drain is cyclically blocked to interrupt direct current flow from the input terminal to the relay's contacts.