Safety issues for power-harware-in-the-loop simulations

Safety of men and machinery has highest priority for all electrical experiments, therefore the usual preventive measures are taken to guarantee safe power hardware-in-the-loop (PHIL) simulations. Besides all precautions by default, two issues are discussed more in detail: the software and the hardware concept of possible implementations for electrical safety. This work is giving an overview on how the classical safety functions must be expanded by additional safety measures in order to meet the specific safety requirements for PHIL simulations. Experiences and results are covering the statements given and show the imperative necessity of a proper implementation of a so-called `safety device´.