Vacuum/SF6 Circuit Breaker--LW3-12 630A 3-Pole Outdoor Pole-Mounted

Product description

The LW3 - 12 630A outdoor pole - mounted SF6 circuit breaker is a three - phase AC 50Hz outdoor high - voltage electrical apparatus3. It uses SF6 gas as the arc - extinguishing and insulation medium and adopts a gas - pressure - type arc - extinguishing structure3. It is mainly used in power systems with a rated voltage of 12kV, such as substations and power plants, to switch rated current and short - circuit current, and can also be used as a tie - in circuit breaker and for switching capacitor banks3. With an in - built current transformer for measurement and protection, it is an ideal upgrade product for circuit breakers3.

Product parameters

• Rated voltage: 12kV
• Rated frequency: 50Hz
• Rated current: 630A
• Rated insulation level: Lightning impulse withstand voltage (full - wave peak value) is 75kV; power - frequency withstand voltage (1 minute) is 42kV; rain withstand voltage test is 34kV; reverse - phase impact pressure is 85 kV. Insulation level under zero - gauge pressure: power - frequency withstand voltage (1 minute) is 30kV; reverse - phase withstand voltage (1 minute) is 30kV; maximum phase voltage (5 minutes) is 9kV.
• Rated short - circuit breaking current: 16kA, 20kA (at 0.25MPa, 20℃)
• Outgoing - phase grounding reclosing breaking current: 14kA, 17.4kA
• Breaking current under zero - gauge voltage: 630A
• Rated operating sequence: Type I: O - 180s - C/O - 180s - C/O; Type II: O - 0.3s - C/O - 180s - C/O

Product features

• Excellent arc - extinguishing performance: Using the gas - pressure - type arc - extinguishing structure and SF6 gas as the arc - extinguishing medium, it has a strong arc - extinguishing ability, a short arcing time, and can effectively cut off load current, overload current, and short - circuit current3. It has the advantages of no re - ignition or re - combustion when switching capacitive or inductive current, and low over - voltage1.
• High reliability: The mechanical life can reach more than 10,000 times, and the 机构寿命次数 can reach more than 3,000 times, which can meet the requirements of frequent operations3. With reliable sealing performance, imported sealing gaskets are adopted, and the moving seal adopts a "V" - shaped sealing ring with spring - pressure compensation structure, which ensures that the annual gas leakage rate is less than 0.05%3.
• Good insulation performance: SF6 gas has excellent insulation performance, and the circuit breaker has passed various insulation tests with a large margin at a gas pressure of 0.3MPa1.
• Compact structure: The overall structure is compact, which is convenient for installation and maintenance. It can be pole - mounted outdoors and is suitable for use in various environments.
• Complete protection functions: It is equipped with an SF6 gas pressure sensor. When the gas pressure drops to a critical level, the breaker automatically locks and triggers an alarm. It also has a high - pressure venting system to ensure the safety of operators and the public. In addition, it can be equipped with an in - built current transformer with high - accuracy measurement for effective protection and measurement of power lines3.