LW8-35 outdoor high-volt AC SF6 Circuit Breaker is applicable for outdoor 50Hz three-phase HV electric equipments and control & protection of 35kV power transmission & distributionsystem, as well as measurement and protection via the breaker enclosed current transformer. Breaker is also used for interconnected circuit breakers and switching capacitor banks. The breaker conforms to standards - IEC62271-100 & GB1984-2003.
The LW8 35kV SF6 Circuit Breaker Structure and Features:
▪40kA break under rated voltage continuously for 20 times without maintenance or SF6 change.
▪The break could withstand 40.5kV for 10 minutes under relative pressure.
▪Reliable mechanical features, large closing capacity, and frequent operation.
▪Switch capacitor bank current 400A without arc reignition, for maximum 800A.
▪Charging line for 25 and 50km without arc reignition.
▪Simple structure, little volume, and long free-of-maintenance period
|Lightning impulse withstand voltage (Full-wave peak)||kV||200/215 (across open contact)|
|Power frequency withstand voltage (1min)||kV||95/118 (across open contact)|
|Rated SF6 pressure (20℃ REL.)||MPa||0.40||0.50|
|Lockout pressure (20℃ REL.)||MPa||0.30||0.40|
|Minimum operation temperature||℃||-40||-30|
|Rated short-circuit breaking current||kA||20 25||25 31.5|
|Rated short-circuit making current (peak)||kA||50 63||63 80|
|Rated short-time withstand current||kA||20 25||25 31.5|
|Rated peak withstand current||kA||50 63||63 80|
|Rated out-of-phase breaking current||kA||5 6.3||6.3 8|
|Total braking time under rated short-circuit breaking current||time||20|
|Closing time (under rated operation voltage)||s||≤ 0.1|
|Opening time (under rated operation voltage)||s||≤ 0.06|
|Rated operation sequence||O-0.3s-CO-180s-O|
|Rated switching single capacitor bank current||A||400|
|Rated short-circuit duration||s||4|
Leistung Energie is a professional sf6 hv circuit breaker manufacturer.