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In this study, DC source voltage is kept at 100 V, and the closed contacts currents are changed from 5 to 30 A with a resistive load. Four types of gases, air, nitrogen, helium, and hydrogen were investigated. The atmospheric pressure is set in the range of form 0.05 MPa (0.5 atm) to 0.4 MPa (4 atm). The arc duration is measured from voltage and current waveforms of break arc discharge. In addition,...
Experiments are carried out to clarify the influence on the current and voltage for various characteristics. A small electromagnetic contactor that has two contacts is used. The arc discharge with only a make arc is generated and various characteristics are measured. Source voltage is set to 100V or 3V DC, closed contacts currents are changed from 10A 20A and 30A. From the waveforms, the arc duration...
The silver nickel contact material is widely used as contacts of the electromagnetic contactor. Experiments have been carried out to clarify the influence of nickel content on various characteristics, such as arc duration, contact resistance, arc energy and electrode mass change. There are six kinds of contacts used, that is, Ag, AgNi5%, AgNi0% AgNi15% AgNi20% and AgNi30% The source voltages are DC-100V,...
The experiments at several source voltages were carried out to clarify the influence of the voltage on various characteristics, arc duration, contact resistance, arc energy, and electrode mass change. The source voltages are changed from 100V to 160V, load current is set to 5A constant, and an electromagnetic contactor is operated continuously up to 100,000 times. The experiments were carried out...
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