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1. gcb has a strong breaking ability and is equipped with integrated hydraulic operating mechanism. the interrupter adopts a composite air pressure structure. the rated breaking current is up to 63 ka and the full capacity breaking times are up to more than 20 times, which can effectively break various fault currents.

2. high insulation level. the gis has a power frequency withstand voltage of 740 kv and a lightning strike of 1675 kv, which completely meets and is better than the insulation requirement of 550 kv specified by iec. the partial discharge of electricity at every bay is only 5 pc.

3. good sf6 gas tightness. the product adopts the special-shaped sealing groove and has three main sealing lines. the annual air leakage rate can be equal to or less than 0.5% / year, and it is promised that the supplement of sf6 gas will not be required within 10 years.

4. small floor area and low requirements for civil engineering. the longitudinal span of a complete string (3-phase gcb) is only 22.7 meters and the height is 9.2 meters. the distance between the strings equal to or longer than 5 meters can be arranged. the small floor area can greatly save economic costs for clients.

5. long mechanical life. when mechanical operations of gcb, ds, es and h-es components are tested 10,000 times in the type test, the product condition is still not deteriorated at all; ensure that the number of consecutive operations is not less than 5,000 times.

6. it meets the requirements of iec 62271-1, iec 62271-100, iec 62771-102, iec 62271-203 and other relevant standards;

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