1. The problem of interrupting direct currents
1.1 DC current interruption
Let's consider the apparently simplest case of an inductive circuit (R, L) supplied with direct current (figure 1 a).
To interrupt the current flowing through this circuit, it is necessary and sufficient that the resistance r of the switch, initially assumed to be zero, increases and becomes infinite (figure 1 b) or, in other words, that its conductance decreases and then becomes zero. When this single condition is met, no current flows through the device, which has become insulating.
At first sight, the variation of the...
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The problem of interrupting direct currents
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References
- - De façon générale, on se reportera utilement aux travaux du Groupe 13 Appareillage de coupure de la Conférence Internationale des Grands Réseaux Électriques (CIGRE), publiés dans la revue Electra et dans les comptes rendus des sessions qui se tiennent à Paris les années paires. Pour la moyenne tension, on se référera aux travaux des Congrès Internationaux des Réseaux...
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