Patent ID: 6466420
Filing Date: 2002-10-15
Classification: H01H

Abstract:
An electrical disconnector comprising:a first contact; a second contact, which is mounted to move along an axial direction relative to said first contact which is fixed in said direction and which co-operates therewith to establish an electrical connection; a rod which extends along said axial direction and which is driven to move said second contact relative to said first contact, wherein said second contact is a hollow tube having a first end which faces said first contact and a second end opposite to the first end, a piston slidable inside said second contact, said piston being mounted on said rod and having a first end facing towards said first contact and a second end opposite from the first end; a first spring interposed between the first end of said second contact and the first end of said piston; a second spring interposed between the second end of said second contact and the second end of said piston; a first locking system provided to lock said second contact in the axial direction during an operation of closing the disconnector at the same time as said first spring is compressed between said piston and the first end of said second contact, said first locking system retracting after said first spring has been compressed by a certain amount so that said second contact is connected to said first contact under the effect of said first spring relaxing; and a second locking system provided to prevent said second contact from moving in the axial direction during an opening operation while said second spring is being compressed between said piston and the second end of said second contact, said second locking system retracting after said second spring has been compressed by a certain amount so that said second contact is disconnected from said first contact under the effect of said second spring relaxing.