The vacuum contractor type OZ-450 is a Three phase AC power adapter (use in circuits of DC is not acceptable) designed for use in electrical equipment to connect the circuits rated voltage up to 1140V in terms AC1-AC4. Contactor OZ-450 is made to the rated current switching. And thermal equal to 450A. Since switching arch occurs in a vacuum chamber and heat losses are small –the contactor is particularly suitable for use in the chemical industry, in the mining industry in sealed enclosures or explosion and wherever required long-term and reliable switching operation. The contactor is made in accordance with the standards PN-G 50003:2003, PN-EN 60947-4-1: 2001/A2: 2007.