12kV Embedded Pole

12kV Embedded Pole Through advanced automatic pressure gel (APG) technique,which enveloped directly the miniaturized ultra-low resistance vacuum interrupter,other components of main circuit in the epoxy resin. Thus the assembly process is simplified, and can help to prevent the loosening of the connecting bolt in vacuum interrupter conductive loop, with the loosening caused by vibration during work. In addition to increase stability, the outside surface of vacuum interrupter is separated from the effect of external forces and environment(such as dust,moisture,small animals),which further improves the distribution of electrical field of poles. Main Technical Data 1 Rated Voltage 12kV 2 Rated Current630/1250/1600/2000/2500/3150/4000A 3 Rated Frequency 50Hz 4 Rated short circuit breakingcurrent 25/31.5/40kA 5 Operations of short-circuit breaking current interruption 30times 6 Rated short circuit making current 80kA 7 Rated peak withstand current80kA 8 Rated shorttime withstand current(4s)31.5kA 9 Rated single capacitor bank breaking current630A 10Rated back-to-back capacitor breaking current400A 11Short time(1min) power-frequency withstandvoltage48kV 12Lighting impulse withstand voltage(peak)85kV 13Circuit resistance at rated contact force≤µΩ 14Mechanical Life 30000 times 15Contact closing force due to bellows and atmosphere 100±30N 16Counter force at rated contact stroke200±30N 17Contact erosion permission length 3mm 18Shelf life20 years 19Part discharge ≤2pC 20Rated operating sequenceO-0.3s-CO-180