FAULT LOOP IMPEDANCE, Part 1

I extend a warm welcome you to watch th recording of the webinar focused on "CEA Regulation 2023 and its Implications on Fault Loop Impedance."
The Central Electricity Authority's (CEA) regulations play a pivotal role in shaping the electrical landscape, ensuring safety, efficiency, and reliability of our electrical infrastructure. Our esteemed panel of experts and speakers are here to share their knowledge, expertise and experiences which will undoubtedly prove invaluable as we navigate these regulatory changes together.

[@jishnunarayan7915]

For MCB we can calculate impedance of breaker by the chara but How we can calculate the impedance values of MCCBs?

[@jishnunarayan7915]

When we reduce the selective short circuit value say from 5 to 3,it is observed that the impedance of the breaker can be increased above the ZS value thus avoid earthfault loop impedance error in amtech software.Do you know why it is happening.