Patent ID: 9196439
Filing Date: 2015-11-24
Classification: H01H

Abstract:
1. A vacuum interrupter arrangement for a circuit breaker, comprising: a first cylindrical shaped vacuum insert within which a first pair of corresponding electrical contacts is coaxially arranged, the first pair of electrical contacts including a first fixed electrical contact which is attached to the first vacuum insert and a first axially movable electrical contact which is configured to be operated by a first pushrod; a second cylindrical shaped vacuum insert coaxially arranged to the first cylindrical shaped vacuum insert and electrically connected in series with the first vacuum insert, the second vacuum insert having coaxially arranged therein a second pair of corresponding electrical contacts, the second pair of electrical contacts including a second fixed electrical contact which is attached to the second vacuum insert and a second axially movable electrical contact which is configured to be operated by a second pushrod; an outer vacuum container coaxially surrounding both the first and second vacuum inserts, the outer vacuum container forming a double contact gap version; a first inner metal shield arranged inside the first vacuum insert and coaxially surrounding the first pair of electrical contacts in the first vacuum insert; a second inner metal shield arranged inside the second vacuum insert and coaxially surrounding the second pair of electrical contacts in the second vacuum insert; and a common metal shield arranged outside the first and second vacuum inserts and coaxially surrounding both the first and second inner metal shields inside the outer vacuum container.