In transient recovery voltage（TRV） adjusting circuit of synthetic test of high-voltage alternating-current circuit-breakers

the frequency-modulation capacitors work in special conditions and the endurance test must be performed under actual load.But the satisfied endurance test circuit including main test circuit and control circuit and measuring circuit is not reported at home and abroad up to now.The whole test process should be performed automatically.The design has many advantages

for example

improving efficiency and safe to equipment and personnel.In the paper

a viable test circuit is designed

and the design is proved effective through industrial run after debugged successfully.