Why let through energy of cable is calculated and compared against protective device let through energy, when adiabatic equation and disconnection time check is used to verify the cable sizes? or this let thru energy verification is applied only for current limiting breakers / fuses?
To be clear, I wanted to ask, When the cables have been already verified using adiabatic equation, Do I still need to check the cables for let through energy verification?
OK, if you haven't used I²t in your calculation, what values have you used for I and t? I is presumably PFC, but what value have you chosen for t?
I2t is taken from the manufacturer published energy let through curves for a PFC
To be clear, I wanted to ask, When the cables have been already verified using adiabatic equation, Do I still need to check the cables for let through energy verification?
OK, if you haven't used I²t in your calculation, what values have you used for I and t? I is presumably PFC, but what value have you chosen for t?
I2t is taken from the manufacturer published energy let through curves for a PFC
