Thanks for your thoughts.
We are using CBs for overload protection and Fuses for short circuit protection. Of course CBs also provide short circuit protection, but for some important drives and motors fuses are also used as additional back up protection.
The problem is that in case of a short...
Hello All,
What is the method for selection of fuses and circuit breakers when they are used in the same circuit. For axample we have a 75KW motor on a 415V system, If we choose a 160A circuit breaker, what should the fuse size be in the same circuit to buck up the C/B?
Is there a ratio between...
What is the requirement for calculating the minimum fault levels?
According to IEC Standard, Maximum and Minimum short circuit levels must be produced. I have a SKM PowerTools for Windows software which calculates Comprehensive Fault Currents without a mention of the minimum fault currents. If...
Soil resistivity data should tell you about impedance of different layers of soil. If lower impedance soil is located at 100meters below surface, your earth rods will not have much effect in reducing the impedance of your earthing system if they don't reach that dept.
Perform a soil resistivity...
