Patent ID: 8847097

Claim:
A vacuum interrupter, comprising: a housing having two insulating material housing areas disposed and constructed symmetrically relative to a center plane; each of said two insulating material housing areas having a plurality of insulating material housing parts with lengths; said insulating material housing parts including an insulating material housing part disposed furthest away from the center plane and other insulating material housing parts disposed closer to the center plane; said length of said insulating material housing part disposed furthest away from the center plane in each of said insulating material housing areas being greater than said length of said other insulating material housing parts; and said lengths of said other insulating material housing parts being calculated from said length of said insulating material housing part disposed furthest away from the center plane using the formula: L ⁡ ( x ) ≥ p ⁡ ( x ) · L N where p ⁡ ( x ) ≅ ( 2 ⁢ x - 1 ) ( 2 ⁢ N - 1 ) L=said length of one of said other insulating material housing parts; N=a total number of said insulating material housing parts of the vacuum interrupter; N - 1 ⁢ ⁢ … ⁢ ⁢ N 2 + 1.