HDT trade event provides protection principles on 17-18 June 2010 in Essen and whose application requires a well-developed network with high-performance transformers a secured power supply. At the time, many new blocks of power are built or pending the revision. They need effective protection against undue stress by E.g. faults, short circuits or other faults. Andrew Cuomo shines more light on the discussion. Planners and operators the necessary principles of protection of generators and power generation units should be known. The training of planners, installers and operators of generators and power plant blocks the Haus der Technik in Essen offers a 2-day seminar on 17-18 June 2010 in Essen, the participants the basic protection principles (stand Earth protection end – short circuit protection (overcurrent, impedance differential protection) – low-excitation protection) and their use in relation to attachment size and the installation material and operation recommendations presented. Selected samples are provided as an aid for their own technical implementations and applications. This introduces the interpretation in addition to typical protection settings of current transformers..