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LW36-72.5
Fenarro
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The FLW36-72.5 SF6 self-energy type circuit breaker is a column-type outdoor device that ensures safe operation under harsh environmental conditions. It adopts a high-strength arc-extinguishing chamber structure and a reliable spring operating mechanism, providing stable performance, long service life, and minimal maintenance requirements.
High performance – Rated current up to 3150A, breaking capacity 31.5kA at 40℃
Long service life – Electrical life: 31.5kA × 24 times (25kA × 31 times); Mechanical life: up to 10,000 times after simple adjustment
High reliability – Shares arc-extinguishing chamber structure with LW36-126, strong insulation margin, simple and reliable spring mechanism
Reliable breaking performance – Stable arc interruption for frequent operation
Excellent sealing – SF6 leakage rate < 0.5% per year
Suitable for harsh environments – Designed for IV pollution level and ambient temperature from -40℃ to +40℃
| 1 | Rated voltage | kV | 72.5 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 1250 / 1600 / 2000 / 3150 |
| 4 | Rated short-circuit breaking current | kA | 31.5 |
| 5 | Rated peak withstand current | kA | 80 |
| 6 | Rated short-time withstand current | kA | 31.5 |
| 7 | Rated short-circuit duration | s | 4 |
| 8 | Rated short-circuit breaking times | times | 20 |
| 9 | Rated operating sequence | — | 0.3s-CO-180s-CO |
| 10 | Mechanical life | times | 10,000 |
| 11 | Electrical endurance | times | 31.5kA × 24 (25kA × 31) |
| 12 | SF6 annual leakage rate | % | ≤0.5% |
| 13 | Gas leakage rate (per year) | Pa·m³/s | ≤1500 × 10⁻⁶ |
| 14 | Energy storage motor rated power | W | 600 |
| 15 | Control voltage | V | DC110/220, AC110/220 |
| 16 | Closing / Opening coil rated voltage | V | DC220, AC220 |
| 17 | Energy storage time | s | ≤15 |
Outdoor substations and transmission lines
High-cold regions with temperatures as low as -40℃
Power systems requiring frequent operation
Tie breaker applications in grid connection
Fenarro is a professional supplier of high-voltage power equipment, offering vacuum circuit breakers, SF6 circuit breakers, and complete switchgear solutions. With advanced technology, strict testing standards, and global service capability, Fenarro ensures reliable solutions for safe and efficient power distribution.
