Abstract
In this paper, we present an experimental study in a simplified arc chamber geometry of Low-Voltage Circuit Breaker (LVCB). The influence of vent aperture on arc motion and the influence of splitter plates on arc voltage drop and arc motion are studied. The arc chamber is composed by two parallel arc runners and following the configuration chosen by one or two splitter plates. The experimental setup is completed by a generator (capacitor bench with triggered switch), a high-speed camera and electrical measurements. The arc ignition, arc displacement, arc splitting and arc re-strike have been observed. The results will be described and discussed for different experimental configurations.
Highlights
The Low-Voltage Circuit Breaker (LVCB) is an electrical device widely used to protect the power system when a fault current appears in the circuit
We present an experimental study in a simplified arc chamber geometry of Low-Voltage Circuit Breaker (LVCB)
The arc roots positions are determined by the method of McBride [9]
Summary
The LVCB is an electrical device widely used to protect the power system when a fault current appears in the circuit. The vent aperture plays an important role on the arc motion and splitter plates lead to increase the voltage drop. The solution is governed by U-J relation obtained by experiments In this relation U and J represent respectively the voltage and the local value of the current density in the neighboring cell of the wall (runners and splitter plates). This method allows presenting a realistic arc root voltage description for simulation. Two parameters are experimentally studied: vent configuration on arc motion and the influence of the number of splitter plates on arc voltage evolution.
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