When the high-voltage switchgears made in China are exported to some regions and countries where the rated frequency is 60 Hz

these products need to satisfy the requirements of type tests at rated frequency of 60 Hz.Although the relevant IEC standards specify the requirements and methods for type test of the switchgears performed at 50 Hz and 60 Hz and STL guides also further specify the requirements in specific tests

the authors sum up the type test items in detail by studying relevant standards in order to confirm them performed at 50 Hz and 60 Hz easily. The authors also analyse the feasibility for some test factors of high-voltage switchgears performed type tests at 50 Hz and 60 Hz. Results show that

except for temperature-rise tests

test duties T60

T100s（T100s（b））

T100 a

short-line fault tests and capacitive current switching tests

other type tests can be performed at 50 Hz or 60 Hz. So this can save plenty of testing time and money for switchgear manufactures.