Application of Standard design of Vacuum Interrupter in Dual Contact Moving VCB to Withstand Higher TRV Values

Use of series vacuum interrupters is known in the industry which is used to improve the dielectric performance of Vacuum interrupters to handle the higher voltages. This uses two or more Vacuum interrupters for the said application or a specially designed Vacuum Interrupters. Which can become a little complicated, bulky.In this paper, a standard design of Vacuum interrupter is used to generate an idea of double moving contact. Commercially available Single moving contact VI are mounted on existing mechanism but with modified linkage in order to pull both the contacts of VI, which results in movement of Fixed contact along with VI Bottle in one direction and Moving contact in other direction.Advantage of this method is that the opening velocity of VI is increased to around twice of original with existing spring mechanism and contact travel along with contact gap also increased, so it can be used for Higher voltages or clearing fault with higher TRV values. A detailed description of the mechanical parameters, its advantages is given.