Patent ID: 6307283
Filing Date: 2001-10-23
Classification: G01D,G08C,H01H

Abstract:
A position-signalling device for a motor drive of a step switch or tap changer, said position-signalling device comprising:a signalling-contacts module including:a circular array of spaced apart fixed contacts each representing a position of said motor drive,a rotatable contact successively engageable with said fixed contacts of said array and connectable in an electric circuit,a member connecting said motor drive with said rotatable contact,a first module connector plug having respective positions connected to said fixed contacts and with said electric circuit; anda microswitch connected in said electric circuit and adapted to interrupt electrical connection with said rotatable contact during switching between successive fixed contacts;a connector having a first connection plug connected with said first module connector plug in a first connector pair, a second connection plug and a line interconnecting said connection plugs; anda position signalling module selected from a set of position signalling modules each having a respective second module connector plug connectable to said second connection plug in a second connector pair, said position signalling modules comprising:output connections connectable to a display of position of said motor drive, andconductive paths between said second connection plug and said output connections varying among the position signalling modules of said set to relate said output connections to said fixed contacts in dependence upon the position signalling module selected, one of said plugs of one of said pairs being reversible in position relative to the other plug of said one of said pairs to signal different senses of rotation of the respective motor drive.