VAKUUMKONTAKT OG ELEKTROMAGNETISK SPOLEINDRETNING HERTIL

• Main Author: LIPPERTS J H F G
• Format: Patent
• Language: Danish
• Published: 20.08.1977
• Edition: 2
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; INDUCTANCES; MAGNETS; RELAYS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SELECTORS; TRANSFORMERS

A vacuum switch comprises an evacuated electrically conducting cylindrical envelope having two movable contact elements therein making electrical contact with one another in a closed condition of the switch and being separated by an electrical insulating gap in the open condition of the switch. The gap is symmetrically disposed with respect to the contact axis of the cylindrical envelope and an electro-magnetic coil is disposed coaxially around the envelope and connected in series with the two contact elements such that in the closed condition of the switch an axial magnetic field is produced in the region of the current passage between the closed contact elements. The ends of the electro-magnetic coil are connected to respective electrically conducting joining rings, one of which is connected to the cylindrical envelope, and the other of which is connected to an electrically conducting disc having a central bore in which the first central conductor is mounted. One end of the cylindrical envelope extends beyond the last mentioned ring and is connected to a disc-shaped electrically conducting base having a central bore in which a central second conductor is mounted. Insulating material is provided between the electro-magnetic coil, the last mentioned joining ring and the envelope as well as between the electrically conducting disc and the disc-shaped base. One of the contact elements is connected to the first central conductor and the other contact element and the second central conductor connect the circuit to be controlled by the vacuum switch.