Hughes OVX720, a state of art modularized high voltage vacuum circuit breaker for 72kV, is designed and manufactured in Sweden for railway feeder station and electrical transmission system applications.


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The OVX720 has the following key advantages:

• Solid insulated bushings (1) that exclude risk for SF6 or mix gas leakage and oil leakage;
• High current vacuum interrupters (2) that will not produce any harmful switching products and are very easy to replace in comparison to gas insulated interrupters;
• The OVX720 uses high-level insulated bushings (3) with silicone surface that gives superior BIL rating;
• The vacuum interrupter has an innovative design because the unit can be modularized between 1, 2 or 3 poles for different applications. Normally 1 and 2 poles versions are used for railway electrification and 3 poles version is used for electrical transmission systems including renewable energy sectors;
• Low life cycle cost is guaranteed due to the combination of extremely high mechanical endurance and outstanding electrical parameters;
• The circuit breaker is completely prewired which makes it an easily remote-controlled solution;

• Solid insulated;
• 72.5 kV 3-phase;
• 42 kV single or double pole;
• 2500 A, 31.5 kA;
• 365 kV BIL;
• 140 kV PF@ 50 Hz;
• Stored energy mechanical actuator;
• Solutions for 1-phase, 2-phase, 3-phase systems;
• Vacuum interrupter enclosed in a solid insulation with silicone surface;
• Anti-vandalism poles fitted with polymeric insulators as standard;