Struggling to understand why you adjust the TRV window when you change the fault current. Surely the TRV window is just a function of the breaker itself?
We usually using statistical (100 simulations) to calculate TRV and RRRV. When switching breaker in real-life, we have to consider the probability of the waveform (switching when in top of the wave sine is different than switching when the sine wave is zero)
Hi Phuc Tran Huru, Right, however, this will depend on the situation. Circuit breakers interupt the current close to current zero-crossings. This is a physical limitation. Therefore, even if you change the switching time, the breaker interupts at zero-crossings. The exception is when the breaker chops a large current, like vaccum CB may chop up to 15A. For example, disconnecting an unloaded transformer. Do you agree with that?
Struggling to understand why you adjust the TRV window when you change the fault current. Surely the TRV window is just a function of the breaker itself?
We usually using statistical (100 simulations) to calculate TRV and RRRV. When switching breaker in real-life, we have to consider the probability of the waveform (switching when in top of the wave sine is different than switching when the sine wave is zero)
Hi Phuc Tran Huru,
Right, however, this will depend on the situation. Circuit breakers interupt the current close to current zero-crossings. This is a physical limitation. Therefore, even if you change the switching time, the breaker interupts at zero-crossings. The exception is when the breaker chops a large current, like vaccum CB may chop up to 15A. For example, disconnecting an unloaded transformer.
Do you agree with that?
@@henrygras5732 Yes I agree with that
Do you have a typical model of 3 fase and 1 case cable in wbline block?
Can I pass measurements from emtp to matlab?
yes. You can salve .mat type variables output from PLOTXY