2015DIN EN 61481-1:2015 Live working - Phase comparators - Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c. (IEC 61481-1:2014); German version EN 61481-1:2014
2002DIN EN 61481:2002 Live working - Portable phase comparators for voltages of 1 kV to 36 kV a.c. (IEC 61481:2001); German version EN 61481:2001