The circuit breaker, disconnecting switch, grounding switch, current transformer, busbar, and other components are organically combined on a grounded steel frame, resulting in a compact structure. It occupies only 30%-50% of the space compared to a separate-type configuration, offering significant advantages such as land savings and reduced construction costs.
The entire compartment is prefabricated in the factory, with assembly and all commissioning completed before shipment, allowing for transportation as a complete unit to the installation site. This greatly shortens the installation period. The design utilizes highly proven, high-performance arc-extinguishing chambers and disconnecting switches, which require minimal maintenance and have high reliability.
The self-supporting busbar, prefabricated in the factory, eliminates the need for the user to build a frame. The layout is flexible and can accommodate various wiring configurations. The circuit breaker can be fully lowered for maintenance or replacement. In the event of a failure, the downtime can be reduced to less than 3 hours, minimizing power outages.
No. Name Unit Parameter 1 Rated voltage kV 72.5 2 Rated power frequency withstand voltage (1 Minute) – Grounded kV 160 Rated power frequency withstand voltage (1 Minute) – Contact gap kV 200 3 Rated lightning impulse withstand voltage – Grounded kV 350 Rated lightning impulse withstand voltage – Contact gap kV 410 4 Power frequency withstand voltage of SF6 gas at zero gauge pressure (5 min) kV 84 5 Rated frequency Hz 50 6 Rated current A 3150 7 First level coefficient 1.5 8 Rated short-circuit breaking current kA 31.5 9 Rated short-circuit making current (peak value) kA 80 10 Rated short-circuit withstand current kA 31.5 11 Rated peak withstand current kA 80 12 Rated short circuit duration s 4 13 Rated out of step breaking current kA 8 14 Short-range fault breaking current kA 90%Ik, 75%Ik 15 Rated line charging switching current A 10 16 Rated operating sequence 0-0.3s-CO-180s-CO 17 Main circuit resistance µΩ ≤ 40 18 Rated sulfur hexafluoride gas pressure (20°C gauge pressure) MPa 0.5 19 Alarm/minimum function pressure (20°C gauge pressure) MPa 0.45±0.03 20 SF6 gas annual leakage rate <0.5% 21 Gas moisture content (V/V) ≤150×10⁻⁶ 22 Mechanical life Times 10000 23 Radio interference level µV ≤500 24 Creep distance – Contact gap mm 2585 Creep distance – Grounded mm 2248 25 Weight of each unit filled with SF6 gas kg 10 26 Weight of each circuit breaker kg 1300
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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