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Arc Suppression Circuit for High DC Currents

IP.com Disclosure Number: IPCOM000076399D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Melnyk, G: AUTHOR

Abstract

A typical circuit is shown at A wherein a capacitor C limits the rise of voltage across contacts CT, which interrupt the circuit to a load L connected to a DC source. A resistor R is used to limit the discharge current of the capacitor when the contacts close. A value of about 1 ohm is typical.

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Arc Suppression Circuit for High DC Currents

A typical circuit is shown at A wherein a capacitor C limits the rise of voltage across contacts CT, which interrupt the circuit to a load L connected to a DC source. A resistor R is used to limit the discharge current of the capacitor when the contacts close. A value of about 1 ohm is typical.

In the circuit at B a diode D is connected across the resistor R so that the resistor is effectively shunted, making the capacitor that much more effective when the contacts open. The resistor can therefore have a higher value, on the order of 10 ohms, decreasing greatly the discharge current of the capacitor through the contacts.

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