The assumption for the Kh is correct. TV stands for “Test Voltage” or also the voltage input. the Kh unit is Wh/pulse and is expressed in secondary so you need to use the CT ratio and PT ratio to express it in primary. So for example, if the CT is 400/5 and has no PT (120/120) then the CT ratio is 80 and PT ratio is 1. So, the overall factor to be used to multiplied to the number of pulses counted by the PLC is:
Factor = Kh x CT ratio x PT ratio = 0.500017776x80x1 = 40.00
So,
Energy consumption (kWh)= [Factor x No. of Pulses received] / 1000