Answer :
Final answer:
The plug setting multiplier is calculated by dividing the relay setting by the secondary current, which is determined using the CT ratio. In this case, the plug setting multiplier is 2.
Explanation:
To calculate the plug setting multiplier, we need to first determine the secondary current. The CT ratio is given as 400/5, meaning for every 400 amps on the primary side, there will be 5 amps on the secondary side. So, the secondary current is (2000 amps * 5 amps) / 400 amps = 25 amps.
The plug setting multiplier is calculated by dividing the relay setting by the secondary current. In this case, the relay setting is 50% and the secondary current is 25 amps, so the plug setting multiplier is 50% / 25 amps = 2.
Therefore, the correct answer is option 2. 2.
