Zhejiang Changkai Electrical Co., Ltd.
Main products:High Voltage Switchgear Panel,Low Voltage Switchgear Panel,Substation,Indoor Vacuum Circuit Breaker,Outdoor Vacuum Circuit Breaker
Contact Us
  • Contact Person : Mr. Gene Pan
  • Company Name : Zhejiang Changkai Electrical Co., Ltd.
  • Tel : 86-0577-61730881
  • Fax : 86-0577-61730882
  • Address : Zhejiang,Yueqing,Dongfang Road East section Wengyang Industry Zone Yueqing
  • Country/Region : China
  • Zip : 325606

SF6 Circuit Breaker,used circuit breakers

SF6 Circuit Breaker,used circuit breakers
Product Detailed
used circuit breakers outdoor type dirtness resistance spring mechanism three-phase porcelain-pole structure

Technical data:

LW36-72.5       outdoor high voltage AC SF6 circuit breaker
Rated voltagekV72.5
Rated power frequency withstand voltage(1min)To earthkVK·160
Between interrupterK·200
Rated thunder impulse withstand voltageTo earthK·350
Between interrupterK·410
Powerfrequency withstand voltage under zero gauge pressure of SF6(5min)K·84
Rated frequencyHz50
Rated currentA3150
Amplitude factor 1.5
Rated short-circuit breaking currentKA31.5
Rated short-circuit breaking current(peak)KA80
Rated short-circuit with stand currentKA31.5
Rated peak value withstand current80
Rated short-circuit durations4
Rated out-of-phase breaking currentKA8
Breaking current of close-in faultKA90%lk,75%lk
Rated line-charging breaking currentA10
Operating sequence O-0.3s-CO-180s-CO
Resistance of the main circuitμ Ω≤40
Rated gauge pressure of SF6(20°C)Mpa0.4
Minimum functional gauge pressure(20°C)Mpa0.35±0.03/0.30±0.03
Annual leakage rate of SF6 <0.5%
Amount of water of SF6(V/V)ppm≤150×10-6
Mechanical lifetimes10000
Electrical level of radio interferenceμ V≤500
Creepage distanceBetween interruptermm2585
To earth2248
Weight of the SF6kg8
Weight of the circuit breakerkg1300
note:external insulation level is changed by modified coefficient. Every 2000m of altitude, K=1.13;altitude3000m, K=1.28
mian technical data of structure
Auxiliary circuit voltageVDC220 or DC110
Thevoltage/current of the opening and closing coilsV/ADC110/4;DC220/2
Eenergy storage motorRated voltageVDC220,AC220/DC110,AC110
The range of normal working voltageV85%-110%
The energy storage time of motors≤15
The loop voltage of the heater and the lampVAC220
Rated voltage of the auxiliary switchVDC220,AC220
Rated current of the auxiliary switchA10
Contacts of the auxiliary switches 10 normal opened contacts and 10 normal closed contacts
Mechnical adjustment of the breaker
Center distance between polesmm1200
Strode length of the moving contactmm120+30 
Contact stroke length of the moving contactmm25+20
Length of the inter phaseoperating connecting rodmm110+30
Switch-off speedm/s4.2-5m/s
Switch-on speedm/s2.2-3m/s
Switch-off timems≤40
Switch-on timems≤100
Break timems≤60
Switch-on/off timems≤80
Switch-off/on timems300
The time difference of the opening of three phasesms≤2
The time difference of the closing of three phasesms≤3

  used circuit breakers

SF6 Circuit Breaker,used circuit breakers

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