Quenching contact arrangement for a compressed-gas circuit breaker

A quenching and contact arrangement for a compressed-gas circuit breaker comprising:

• a first contact piece;
• a tubular-like contact piece axially arranged with respect to said first contact piece;
• at least one of the contact pieces being movable with respect to the other one of the contact pieces between a first position whereat said contact pieces are in contact and a second position whereat said contact pieces are separated and a gap exists between an end face of said one contact piece and an end face of said other contact piece closest said end face of said one contact piece, an arc being drawn between said contact pieces and across said gap when said movable contact piece is in said second position under load;
• gas-blast means for developing a stream of gas for blasting the arc;
• and, turbulence grid means arranged in the flow path of said stream of gas so as to extend over the length of and directly surround said gap, said turbulence grid means being a tubular member made of insulating material and having a perforated tubular wall, a perforated portion of which extends along the length of and surrounds said gap.