Load Bank is a device which provides an electrical load. The work of a Load Bank is to take real load that a power source will see in actual application.
Load bank is to used to optimized the actual load. Load bank will check that the components within the power protection system will work.
We can use Load Bank where there is 100% redundancy like IT, Data center, Big Corporate companies, Banks and at many other places.
We need actual load to test the Machines. We can use load bank where there is no actual load find out in machine and it is still working.