FAST-ACTION SHORT-CIRCUITING SWITCH Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: invention refers to low-voltage protection equipment. Each phase of fast-action short-circuiting switch has stationary U-shaped laminated core 16 which first pole carries current coil 9 placed in series in phase circuit. Adjustable spring 19 turns mobile laminated armature 17 as far as it goes in direction of increase of air gap between first pole and armature. Conductive lever 21 with mobile contact is made fast to armature 17. Insulation block 26 with stationary contact is made fast to core. Lever 21 is coupled to tap of coil 9 connected to load circuit via swing joint 27. Stationary contacts of three phases are interconnected with wires. EFFECT: increased reliability of operation. 4 cl, 3 dwg