Product Overview:LW36-126KV /145V SF6 Circuit Breaker
LW36-126145) (W) circuit breaker is suitable for single-phase operation, three-phase electical linkage and three-phase mechanical linkage,Grid frequency 50 / 60Hz, neutral grounded system and neutral ungrounded system, C2 level of back-to-back capacitor bank and C2 level ofno-load ine-charging breaking capacity and no-load cable-charging breaking capacity. products have reached the leading domestic and intemationaladvanced level in advanced technology and quality reliability.
By adopting SF6 gas as the arc extinguisher and insulation medium, using advanced self-energy power arc extinguishing technology,and being equipped with new-type spring actuating mechanism, this product has features such as long electrical en-durance, less operating power,low noise, and high reliabilty. It has a simple siructure, small size, long maintenance-free cycle.in the current trend of oil-free and high capacity electricity equipments.
Specifications and Parameters:
| Rated voltage | 145kV | 126kV | |
| The altitude | ≤3000m | ≤4000m | |
| The environment temperature | -50℃ ～+55℃ | ||
| Pollution level | Ⅳ | ||
| The wind speed | 34m/s | ||
| Earthquake resistant level | AG5 | ||
| Power frequency wihstand voltage,1min | To earth | 275kV | 230kV |
| Across open breaks | 315kV | 230+73*kV | |
| Rated lighning impulse withstand voltage | To earth | 650kV | 550*kV |
| Across open breaks | 750kV | 550+130*kV | |
| Rated Frequency | 50/60Hz | 50Hz | |
| Rated normal current | 3150/4000A | ||
| Rated short circuit breaking current | 40kA | ||
| Rated short circuit duration time | 4s | ||
| Coefficient of opening pole | 1.3/1.5 | 1.5 | |
| Electrical life | 22times | ||
| SF6 gas pressure (gauge pressure 20℃) | 0.6MPa(or SF6+CF4)50Hz | 0.5MPa 50Hz | |
| 0.6MPa 60Hz | 0.6MPa(or SF6+CF4)60 Hz | ||
| Mechanical life | 10000times | ||
Notes: parameter value with " *" is corrected by altitude correction coefficient K: altitude 2000m, K=1.13; alftude 3000m, K=1.28.
Product Features:
1.Reliable breaking performance: This circuit breaker can consecutively break 40kA short circuit current for 22 times without overhaul.
Neutral grounded system and neutral ungrounded system, first-pole-to-clear factor 1.3/1.5
C2 level of no-load ine-charging breaking capacity and no-load cable-charging breaking capacily, C2 level of the back-to-back capacitor bank breaking capacity, no restrike.
2.Reliable mechanical operating performance: The mechanical life of the circuit breaker under continuous operation can reach up to 10000 times M2 class.
3.Reliable seismic performance: Comply with lEEE693-2018 1.0g high seismic level and ETG Chile seismic standard requirements.
4.Reliable current-carrying function: After 3780A temperature-rise test, the temperature-rise values at all points still have much margin.22.
5.Reliable insulation ability: creepage distance of extemal insulation≥31mmkV, strong pollution resistance; suitable for safe running in hard environments with an altitude of no more than 3000m.
6.Reliable sealing performance. it is guaranteed that the SF6 gas has an annual gas leakage rate of far less than 0.5%.
7.Strict dehumidification process for component parts of the product:the SF6 water content is far lower than similar products.
8.Simple structure, long overhaul cycle, convenient on-site installation and debug, safe and reliable running experience of more than 25000 sets, applied woridwide.
9.Optional phase closing device.
We offer the most advanced engineering design solutions and product technology solutions to global power customers, and continue to create value for the commercial success of global power customers.
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