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High Voltage Indoor Three Phase Vacuum Circuit Breaker. High Breaking Capacity: Rated short-circuit breaking current up to 31.5KA for reliable protection. Vacuum Arc Extinguishing: Utilizes vacuum medium for stable performance and long mechanical life. Flexible Installation: Can be fixed in switch cabinets or installed on handcarts for versatility. Comprehensive Protection: Features overcurrent, OVP, and circuit-breaker failure protection functions. Customization Available: Supports full customization, minor customization, and design-based options. Certified Quality: Holds ISO9001-2000 and CCC certifications with 100% QC inspection.