Arrangement of resistors for switching of capacitive loads in an electromagnetic switching device
AssigneeAllen-Bradley Company, Inc.
InventorRudolf Nikles
Life of this patent
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Abstract
The arrangement of resistors is intended for the switching of capacitive loads in an eletromagnetic switching device with main contacts (3) and auxiliary contacts (4). One of the terminals (7) of the auxiliary contacts (4) and one of the terminals (6) of the main contacts of the same phase are located above each other on the same side of the switching device. The auxiliary contacts (4) close before the main contacts (3) and open after same. A rigid resistor (8) is connected between the terminals (6) and (7) of each phase. The rigid resistor (8) facilitates upgrading of existing electromagnetic switching devices (1) with resistors (8) that are required for switching of capacitive loads.
Claims6
An electromagnetic switching device used to switch capacitive loads comprising:
- a main contact, said main contact comprising a first main contact terminal and a second main contact terminal;
- an auxilary contact, said auxilary contact comprising a first auxilary contact terminal and a second auxilary contact terminal, said first main contact terminal located proximal said first auxiliary contact terminal and said second main contact terminal connected to said second auxiliary contact terminal;
- a rigid unitary planar resistor connected between said first main contact terminal and said second auxiliary contact terminal;
- whereby in use said auxiliary contact closes before the main contact and opens after the main contact.
Dependencies are inferred from the claim text.