Ningbo Hyuan Power Industry Co., Ltd.  

Product Name: 33kv/72.5kv/123kv/145kv Outdoor Live Tank Sf6 Insulating Circuit Breaker Model NO.: LW Certification: ISO9001-2000 Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection Type: Circuit Breaker Poles Number: 1 Structure: Live Tank Installation: Outdoor Arc-extinguishing Medium: SF6 Speed: High-Speed Circuit Breaker Operation: Manual Type Breaking Capacity: High Voltage Circuit Breakers Trademark: HEMG Transport Package: Carton with Wooden Specification: 33kv/66kv/132kv Origin: China Product Description 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 ambient1.3.1 Height above sea level: 2500 m (special order is available for the high elevation);1.3.2 Ambient temperature: -30ºC~+40ºC(special orders are available under -30ºC)1.3.3 Rated wind speed:34m/s;1.3.4 Shock resistance: level 8;1.3.5 Dirtiness level: l level III 25mm/kV and level :3.1cm/kV.1.4. Technical parameters1.4.1 See table 1 for main technical parameters of the circuit breakerTable 1No.Name Unit ValueLW-1451 Rated voltage kV1452 Rated currentA1600,2000,31503 Rated frequency Hz50/604 Rated short time withstand current (4S)kA405 Rated short-circuit period S46 Rated short circuit Dropout current Short-circuit current kA40Percent for zero frequency component -45%7 Rated short circuit close current (peak value) kA1008 Rated peak withstand current kA1009 Close-in fault drop-out current kAIe×90% le×75%10 Rated step-out dropout current kAIe×25%11 Rated line charging dropout current A31.512 Initial pole factor-1.513 Rated operating sequence -O-0.3S-CO-180S-COTable 1 (continued)No. Name Unit ValueLW-14514Rated insulation level1-min power frequency stand voltage (valid value for dry and wet)Open contactkV275Space in between275Over the ground275Lightning surgeStand voltage(peak value)Open contact750Space in between650Over the ground6505minZero gage pressure withstand test (valid value)Open contact105Over the ground10515Open circuit timems≤6016SF6 gas rated pressure (20ºC)MPa0.55Alarm pressure0.50Interlock pressure0.4517Terminal STVertical orientationN1250Horizontal orientation750Vertical direction1000l 8Inherent opening timeRated voltagems26~35Low-voltage26~3519Closing timems≤12020Opening synchronismms≤221Closing synchronismms≤422Re-closing propertyOpening-0.3S-closi-ng and openingFirst opening timems26~35Opening and closing timems280~300Closing timems80~120Closing and opening timems<50Second opening timems26~3523Major loop circuit resistance for each poleμOM≤4024Control circuit voltageVDC110/DC22025Opening & closing coil voltageVDC110/DC22026Opening & closing coil currentA3.67/227Motor voltageVAC220/DC22028MotorW60029 Heater voltage VAC22030 Mechanical life times6000(2000×3)31 Radio interference voltage U V≤500(2500)*232 Leakage rate examination for SF6 gas -≤1%33 Shell protection level-IP4×34 SF6 gas is charged for each unitkg735 Gross weight for each unitkg27001.4.2 Mechanical parametersSee table 2 for mechanical parameters of the circuit breaker and the operating mechanism.Table 2No.Item Unit DataRemark1 Stroke mm150+2-4See figure 13 for stroke measuring of the circuit breaker 2 Contact stroke mm27±23 Spring mechanism's piston rod stroke mm1000-34Gap between the shear lever roller and the cam mm1.4±0.3As the Circuit breaker is in opening state, the closing spring has been stored with energy.5 Set nut for the closing spring Distance to the locating levermm≤556 Closing electromagnetic iron stroke Cmm5.0~5.5The circuit breaker is in the opening status, see figure 14 Gap between the Flip-flop and the release device D2.0~2.5 C -D2.5~3.5 Gap between the flip-flop and the de-bouncing bar E1.0~2.07 Closing electromagnetic iron stroke Fmm2.8~3.2See table 15 for the on-position of the circuit breaker Gap between the Flip-flop and the release device G0.8~1.2 F - G1.6~2.4See table 3 for parameters of the control circuit and the secondary group circuitTable 3No.ItemUnitDataRemark1Opening & closing coil control voltageVDC110/2202Opening coil currentA3.67/23Closing coil currentA3.67/24Motor voltageVDC 220/AC 220As per purchase contract5Power of motorW6006Motor speedr.p.m5307Motor currentA5.5/2.78HeaterVoltageVAC 220As per purchase contractPowerW100(250)1.4.3 See table 4 for gas pressure parameter of SF6 (20ºC) (gage pressure)Table 4 No. Item UnitData1 Rated inflation pressure Mpa0.552 Alarm pressure for air-in Mpa0.50±0.023 Bottoming pressure of the circuit breaker Mpa0.45±0.02