Dear sir,

Attached file indicate test certificate for air circuit breaker

I want to know what are these tests and what are setting for current and time for each test.becouse it isn't clear for me

Which is ETU connected & check its setting.

From the attached sheet, readings are as below.

Contineous over current @ 3840 A time delay of 20 Sec breaker tripped.

On instateneous triping of L1 = 2750, L2 = 2738, L3 = 2747 breaker tripped.

On ground fault L2 @ 325 A time delay of 0.1 sec breaker tripped.

HTH.