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.
LW8 35kV SF6 Circuit Breaker
Model LW8-35
Product Description
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
| NAME | UNIT | DATA | ||
| Rated voltage | kV | 35 | ||
| Maximum voltage | kV | 40.5 | ||
| Rated insulation level | 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 current | A | 1600/2000 | 1600/2000/2500/3150 | |
| Mechanical endurance | time | 5000 | ||
| 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.