Study on Arc Characteristics of a DC Bridge-type Contact in Air and Nitrogen at Different Pressure
Исследование характеристик дуги мостикового контакта постоянного тока в воздухе и азоте при различных давлениях
2014-01-01
SCID: 54.1/3j6v2zcg
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DC arc interruptionDC bridge-type contactarc duration and motionhigh-pressure gasnitrogen arc chamber
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Abstract (AI)
High voltage DC contactors, for operation at voltage levels up to at least about 300 volts, find their increasing markets in applications such as electrical vehicles and aircrafts in which size and weight of cables are of extreme importance. The copper bridge-type contact, cooperated with magnetic field provided by permanent magnets and sealed in an arc chamber filled with high pressure gases, is a mainly used structure to interrupt the DC arc rapidly. Arc characteristic in different gases at different pressure varies greatly. This paper is focused on the arc characteristics of the bridge-type contact system when magnetic field is applied with nitrogen and gas at different pressure. The pressure of the gases varies from 1 atm to 2.5 atm. Arc characteristics, such as arc durations at different stages and arc motions in those gases are comparatively studied. The results are instructive for choosing the suitable arcing atmosphere in a DC bridge-type arc chamber of a contactor.
Key Findings
1
Arc characteristics vary substantially with gas type and pressure, informing selection of the arcing atmosphere for DC contactor chambers.
2
Arc durations at different interruption stages and arc motion are comparatively analyzed across gases and pressures.
3
Gas pressure is varied from 1 atm to 2.5 atm to assess its effects on bridge-contact arc behavior.
4
The findings target rapid interruption of DC arcs in high-voltage contactors operating at voltages up to approximately 300 volts.
5
The study investigates DC arc characteristics in a bridge-type copper contact under applied magnetic fields, using air and nitrogen atmospheres.
Research Object
DC bridge-type contact system in a sealed arc chamber filled with air or nitrogen at pressures from 1 to 2.5 atm under an applied magnetic field
Research Subject
Arc characteristics, including stage-specific arc durations and arc motion, and their dependence on gas type and pressure
Publication Details
Publication Date
2014-01-01
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