DIN EN 61481/A2:2006 帶電作業. 1 kV - 36 kV 交流電壓用便攜式相位比較儀(IEC 61481-2001/A2-2004, 修訂).德文版本EN 61481-2001/A2-2005
Live working - Portable phase comparators for use on voltages from 1 kV to 36 kV a.c. (IEC 61481:2001/A2:2004, modified); German version EN 61481:2001/A2:2005