DIN EN 60071-1 VDE 0111-1:2010-09

Part 1 of series DIN EN 60071 applies to a.c. systems with a maximum voltage for equipment over 1 kV. It describes how to proceed with the selection of standardized insulation levels for phase-to-earth, phase-to-phase and longitudinal insulation of equipment and installations in these systems. It provides a list of standardized values, of which the rated voltages are to be chosen. The present standard contains amendment 1 including additional standardized ultra high voltage levels. 1100 V and 1200 kV are being introduced as new voltage levels (highest voltages for equipment). The required lightning impulse withstand voltages and switching impulse withstand voltages are assigned to those two new voltage levels.