LW8-40.5T outdoor high-voltage sulfur hexafluoride circuit breaker is an outdoor high-voltage electrical equipment with three-phase AC 50Hz.
It is applicable to the control and protection of 35kV Transmission and distribution system; It can also be used for connecting circuit breakers and opening and closing capacitor banks; The current transformer can be connected for measurement and protection.
Equipped with ct35 or CT10 spring operating mechanism, it complies with the national standard GB1984 AC high voltage circuit breaker.
It is mainly composed of supporting insulator, current transformer, starting element, transmission element, base, operating mechanism, etc.
For more information about LW8-40.5T SF6 circuit breaker, please contact us.
Parameter name | Unit | Parameter value | |||
Rated voltage | kv | 40.5 | |||
Rated frequency | Hz | 50/60 | |||
Rated current | A | 1000/1250/1600 | |||
2000/2500/3150/4000 | |||||
Rated short-circuit breaking current | kA | 25 | 31.5 | 40 | |
Rated short-circuit switching current (peak) | kA | 60 | 80 | 100 | |
Rated short-circuit withstand current (thermal stability current) | kA | 25 | 31.5 | 40 | |
Rated peak withstand current (thermal stability current) | kA | 63 | 80 | 100 | |
Rated out of step breaking current | kA | 6.3 | 8.0 | 10.0 | |
Cumulative breaking times under rated short-circuit breaking current | N | 30 | |||
Rated short circuit duration | S | 4 | |||
Rated lightning impulse withstand voltage | Relatively | kV | 185 | ||
Between fractures | kV | 215 | |||
Rated 1min power frequency withstand voltage | Relatively | kV | 95 | ||
Between fractures | kV | 118 | |||
Rated operating sequence | O-0.3s-CO-180-CO | ||||
Closing time | MS | ≤100 | |||
Opening time | ≤50 | ||||
Breaking time | ≤50 | ||||
Closing and opening time | ≤60 | ||||
Closing synchronization | ≤3 | ||||
Opening synchronization | ≤2 | ||||
Voltage of opening coil and opening coil | V | DC: 220/110 | |||
Energy storage motor voltage | V | AC: 220/110 | |||
DC: 220/110 | |||||
Single circuit resistance | µΩ | ≤70 | |||
Rated SF6 other pressure | MPa | 0.45 | |||
Annual leakage of SF6 gas | ≤5% | ||||
Moisture content of SF6 gas | ppm(v/v) | ≤150 | |||
Radio interference level | µV | ≤2500 | |||
Mechanical life | N | 10000 |
>> Installation scenario / 场景安装
>> Structural analysis / 结构解析
>> Performance characteristics / 性能特点
>> Structural features / 结构特点
>> Service conditions / 使用条件
>> Why choose us / 为什么选择我们
Hydropower station #1
Factory and mining enterprises #2
Ring network power supply #3
Petrochemical Enterprises #4
1. Reliable breaking performance: self energy arc extinguishing technology is adopted, which can continuously break 40.5ka short-circuit current for 22 times without maintenance.
2. Reliable mechanical operation performance: the mechanical service life of the short circuit breaker can reach 6000 times in continuous operation. After simple adjustment, it can reach more than 10000 times, with high operation reliability.
3. Reliable insulation capacity: the specific creepage distance of external insulation is > 31m / kV, with strong pollution resistance. It is suitable for safe operation in harsh environment with altitude not exceeding 3000m. The insulating pull rod can withstand 250kV / 5min in the air.
4. Reliable sealing performance: ensure that the annual leakage rate of sulfur hexafluoride gas is far less than 0.5%.
5. The dehumidification process of product parts is strict: the moisture content of SF6 is far lower than that of similar products.
>>Self-energy arc extinguishing using arc energy to establish the pressure value needed for arc blowing
>>Use its own ability to heat the SF6 gas in the gas storage chamber
>>Form a high-speed air flow at the nozzle, when the current exceeds zero, the arc is extinguished
Lawrence Electric Co., Ltd. is a high-tech enterprise focusing on power transmission and distribution products, providing customers with one-stop service of power transmission and distribution products.
It mainly produces and sells lightning arrester, insulator, fuse, isolation / load switch, SF6 / vacuum circuit breaker, power supply fittings, optical cable fittings, switch cabinet and other transmission and distribution products. The company has production bases and sales centers in Jiangxi, Zhejiang, Uganda, Tanzania and other places.
Our products have operated safely in the power supply systems of more than 20 countries and regions around the world for more than 10 years. They are also qualified suppliers of China State Grid and China Southern Power Grid. At present, they have gained a good reputation in the field of power system in the world.
We have received high-quality product recommendation letters from power supply companies in Kenya, Uganda, Tanzania, Zambia, Guinea, Ghana, Togo, Mozambique, Nepal, Guyana, Myanmar and other countries and regions.
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