LW8-40.5 OUTDOOR HIGH VOLTAGE SULFUR HEXAFLUORIDE CIRCUIT BREAKER (MIDDLE TYPE)
Product Overview
LW8-40.5 series sulfur hexafluoride circuit breakers are threephase AC 50Hz outdoor high voltage electricalequipment, applicable to 40.5 kV transmission and distribution system controlling and protection, alsofor contacting circuit breaker and open-close capacitor bank. Product breaking performance is excellent, using compressed air interrupter, long electrical life, at rated voltage 40 kV short-circuit current continuous on-off up to 21 times without maintenance; Two current transformers per unit, for users choosing. The product adopts a new MKZ SF6 pointer density meter, pressure gauge readings are not affected by temperature changes, easy to use. CT14 spring mechanism is used in this product. The circuit breaker contains floor tank type and porcelain column type. Porcelain column type has two kinds of arrangement,parallel arrangement and elevated T frame (middle type) arrangement.
Working Environment
1.The altitude)：1000m；2000m；3000m；
2.The environment temperature)：~30℃ +40℃
3.Pollution level)：II、III、IV
4.Main Technical Parameters.
| No | Item | Unit | Data | ||
| 1 | Rated voltage | kV | 40.5 | ||
| Rated insulationLevel | Lightning impact withstand voltage (full crest value) | kV | 185 | ||
| Power frequency withstand voltage (1min) | kV | 95 | |||
| 2 | Rated current | A | 1600 2000 | ||
| 3 | Mechanical life | time | 3000 | ||
| 4 | Rated pressure of sulphur hexafluoride gas (gauge pressure at 20℃ ) | MPA | 0.50 | ||
| 5 | Alarm pressure/minimum functional pressure (gauge pressure at 20℃ ) | MPA | 0.47/0.45 | ||
| 6 | Rated short circuit switching current | kA | 25 | 31.5 | |
| 7 | Rated short-circuit closing current (peak) | KA | 63 | 80 | |
| 8 | Rated Short-Time withstand current (thermal stable current) | kA | 25 | 31.5 | |
| 9 | Rated Short-Time withstand current (thermal stable current) | kA | 60 | 80 | |
| 10 | Rated short circuit switching current | kA | 63 | 8 | |
| 11 | The cumulative number of switching times under rated short-circuit switching | Times | 15 | 10 | |
| 12 | Rated short circuit duration | S | 4 | ||
| 13 | Closing time (at rated operating voltage) | S | ≤ 0.1 | ||
| 14 | Switching time (at rated operating voltage) | S | ≤ 0.06 | ||
| 15 | Rated order of operation | C-0.3s-CO-180s-CO | |||
| 16 | Rated opening and closing monomial capacitor bank current | A | 400 | ||
| 17 | In leakage | %年years | ≤ 1 | ||
| 18 | (V/V) Water content of sulfur hexafluoride gas (V/V) | ≤ 150×10-9 | |||
| 19 | CT14 spring operating mechanism with rated operating voltage | ||||
| Closing coil, opening coil voltage | V | (AC):220 380 (DC):48 110 220 | |||
| Energy storage motor voltage | V | (AC):220 380 (DC):110 220 | |||
| 20 | Sulfur hexafluoride gas weight | KG | 8 | ||
| 21 | Weight of circuit breaker (including operating mechanism) | KG | 1400 | ||
