The concepts of protection and transfer between supplies are fundamental to the performance of high availability installations.  These concepts represent, however, some of the most challenging design analysis for any electrical project – and the choices at this design stage must be made carefully.

Ensuring that both protection and transfer work together – in a way that is complementary – requires a careful balancing act.  Achieving the optimum combination is always a case of compromise, particularly in order not to improve one aspect at the expense of the other.

In this document you will find analysis to help achieve the optimum balance, considering factors such as power sources, cabling and control systems.