Vacuum Interrupter for Indoor Circuit Breaker

ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS1.Rated Frequency50/60Hz2.Rated Maximum Line to Line Voltage36kV,r.m.s3.Rated Power Frequency Withstand Voltage:Air 95kV,r.m.s4.Rated Impulse Withstand Voltage:Air185kV,Peak5.Rated Normal Current800A6.Rated Short-Circuit Current(3Phase Symmetrical Basis)18.4kA,r.m.s7.Percentage D.C. Component of Rated S.C. Breaking Current50%8.Rated Short-Circuit Making Current46kA,Peak9.Rated Duration of Short Time Current3s10.Rated Short Time Withstand Current18.4kA,r.m.s11.Rated Peak Withstand Current46kA,r.m.s12.Maximum Contact Resistance at Minimum Closing Force16Micro ohms13.Capacitor Switching Capacity(Single Bank)400A,r.m.sMECHANICAL DATA1.Interrupter Weight(Approx.)4.08kg2.Moving Part Weight(Approx.)2.9kg3.Contact Force from Atmospheric Pressure19.8kgFMECHANICAL REQUIREMENTS(REF. VCB)1.Contact Stroke16±1 mm2.Opening Speed(average of 75 contact gap) 1.2-1.6m/Sec3.Maximum Overtravel During Opening2mm4.Maximun Rebound During Opening2mm5.Closing Speed(average of last 30% contact gap)0.6-1.0m/Sec6.Maximum Contact Bounse Duration(with maximum 2 bounces)0.002Sec7.Rated Contact Compressive Force230-270kgFLIFE (ESTIMATED)1.Electrical Life at Rated Normal Current50,000Operations2.Electrical Life at Rated Short Circuit Current100Operations3.Mechanical Life50,000Operations4.Contact Erosion Limit3mm5.Shelf Life20Years