For the current transformer taps, what would be proper way to figure out saturation values from the CT curve?
Do I draw the circuit diagram relate to the question including the relay?
I know the wire needs to be considered as twice because it is connected to the source.
Below is the example you could use it to explain.
Any help would be appreciated.
Fa Shin,
I think:
(Total burden impedance) x (Secondary current) = (Secondary voltage)
The secondary current should be found from the maximum fault current by either of the current ratios. The (voltage, current) pair should fall in the saturated region corresponding to the selected current ratio for you to decide if the core is saturated or not !
-Sanjay
Mathematical modeling,to study waveform of power transformer inrush, on CT secondary for 132 and 220KV system, to develop, " New one cycle microprocessor based relay....", I did mathematical modeling of CT, with BH curve simulation, refer my papers.
Thank you Dr. Sanjoy, and Dr. Bhupendra. When they say the rated load current to be 110A , Do I need to convert the given current ratio 100/5 and 200/5 to 110A ratio? If my assumption is right, how do you convert those two ratio to rated load current 110A? Since the question also mentioned about the maximum fault current, I am confused, which current I need to use to covert the secondary current (the nominal secondary current from primary current)
100\5 could be used as CT would not be saturated with raised 10 amp on 100 amp range......