33kv/72.5kv/123kv/145kv Outdoor Live Tank Sf6 Insulating Circuit Breaker

LW high voltage sulphur hexafluoride circuit breakers belongs to three-phase alternating current 50 Hz high voltage switchgear, which is mainly used for the control and protection of transmission line as well as used as the contact circuit breaker.The product adopts mixed type self-arc extinguish chamber. The triple pole is equipped with one spring operating mechanism to conduct the tree-pole mechanical operating, so as to realize remote or local operation. 1.3. Operating ambient1.3.1Height above sea level: 2500 m (special order is available for the high elevation);1.3.2Ambient temperature: -30ºC~+40ºC(special orders are available under -30ºC)1.3.3Rated wind speed:34m/s;1.3.4Shock resistance: level 8;1.3.5Dirtiness level: l l evel III 25mm/kV and level :3.1cm/kV.1.4.  Technical parameters1.4.1See table 1 for main technical parameters of the circuit breakerTable 1No.Name Unit     ValueLW-1451   Rated voltage  kV 145 2   Rated current A 1600,2000,3150 3   Rated frequency  Hz 50/60 4   Rated short time withstand current (4S) kA 40 5   Rated short-circuit period  S 4 6  Rated short circuit Dropout current   Short-circuit current kA40 Percent for zero frequency component -45%7   Rated short circuit close current (peak value)  kA 100 8   Rated peak withstand current   kA 100 9   Close-in fault drop-out current  kA Ie×90% le×75% 10   Rated step-out dropout current  kA Ie×25% 11   Rated line charging dropout current  A 31.5 12   Initial pole factor -1.5 13   Rated operating sequence  -O-0.3S-CO-180S-CO        Table 1 (continued)No. Name Unit ValueLW-145 14Rated insulation level1-min power frequency stand voltage (valid value for dry and wet)Open contact kV275 Space in between 275 Over the ground275 Lightning surgeStand voltage(peak value)Open contact750 Space in between650 Over the ground 650 5minZero gage pressure withstand test (valid value)Open contact105 Over the ground10515 Open circuit time ms≤60 16SF6 gas rated pressure (20ºC) MPa0.55 Alarm pressure 0.50 Interlock pressure 0.45 17Terminal STVertical orientation N1250 Horizontal orientation  750 Vertical direction 1000 l 8Inherent opening timeRated voltage ms26~35 Low-voltage 26~35 19 Closing time ms≤120 20 Opening synchronism  ms≤2 21 Closing synchronism ms≤4 22Re-closing propertyOpening-0.3S-closi-ng and openingFirst opening time ms26~35 Opening and closing time ms280~300 Closing time  ms80~120 Closing and opening time ms