Parameters Category Parameter Typical Specification / Interpretation for VTR714 General Type Truck-Mounted, Air-Insulated, Vacuum Circuit Breaker Mounting Withdrawable, for UniGear ZS1 or similar metal-clad switchgear. Rated Values Rated Voltage (Ur) 7.2 kV, 12 kV, or 15 kV (System dependent). Rated Frequency 50 Hz / 60 Hz Rated Normal Current (Ir) Likely in the range of 1250A, 1600A, 2000A, 2500A, or 3150A. ("714" may indicate a 2000A or 2500A frame). Rated Short-Time Withstand Current (Ik) 25 kA or 31.5 kA for 3 seconds (Typical). Breaking Capacity Rated Short-Circuit Breaking Current (Isc) 25 kA or 31.5 kA (Symmetrical RMS). Rated Making Current 2.5 x Isc (Peak) Interrupting Medium Arc Extinction Medium High Vacuum Number of Interrupters per Pole 1 Mechanical Operating Mechanism Spring-operated stored energy mechanism. Motor-charged, with manual charging option. Closing Time ~60 - 100 ms Opening Time ~30 - 60 ms (Including relay time). Mechanical Endurance 10,000 - 20,000 operations Control & Auxiliary Rated Control Supply Voltage AC/DC: 110V, 125V, 220V, 250V (Order specific). Auxiliary Contacts Multiple NO/NC contacts for signaling and interlocking. Physical Cooling (for high-current variants) Natural convection (air) or forced liquid cooling for terminals/bushings. Weight Approx. 250 - 400 kg (Highly dependent on current rating). Standards Compliance IEC 62271-100, IEC 62271-1, ANSI/IEEE C37.04, C37.06.