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For a traction transformer circuit breaker state: 1) Rated current and rupturing capacity 2) Any two tests it should be capable of withstanding 3) Overall tripping time and relay time.

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Ans: 1) Rated current --- 750 A and Rupturing capacity --- 500 MVA 

2) Any two tests it should be capable of withstanding --- Breaking test , Reclosing test , Endurance test ( any two ) 

3) Overall tripping time --- 0.14 sec and Relay time --- 0.04 sec 

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