Wound capacitor comprising an excess-pressure safety device

摘要

A wound capacitor comprising a cylindrical housing which includes an expansion space which is closed on the one side by a lid and which is bounded on the other side by a rigidly arranged centering disc which is provided with openings. Through such openings the expansion space is in open communication with a space in which a capacitor roll, disposed on a cylindrical core, is arranged. Connection wires are connected to the electrodes in the capacitor roll. These wires are anchored in the lid as well as in a centering member arranged in the centering disc. The centering member is locked against axial displacement by way of a shoulder which bears against the centering disc. In the case of an inadmissibly high gas pressure in the capacitor, the lid is displaced relative to the centering member and the connection wires are broken, the capacitor thus being rendered explosion-proof.