With the continuous promotion of " the Belt and Road" construction

the export of power equipment has become an inevitable trend of industry development. However

the domestic control and protection equipment

especially the operation circuit of high - voltage circuit - breaker

is quite different from overseas products in device design

operation and maintenance habits. As a result

the domestic design concept is often not accepted by overseas counterparts. In order to improve the applicability of domestic operation circuit in overseas countries

a comparative study on the operation circuit of domestic and foreign high - voltage circuit - breakers is carried out from the aspects of device configuration

circuit design

operation and maintenance habits and coordination with primary equipment. The differences between domestic and foreign technical solutions is summarized. Based on the experiences of electrical secondary design of ± 800 kV Belo Mount II DC transmission project

the connotation of domestic and foreign technical differences is analyzed

and the key problems to be solved for overseas promotion of the relevant domestic equipment are pointed out.