Applies to portable phase comparators with or without a built-in power source to be used on electrical systems for voltages from 1 kV to 36 kV a.c. and frequencies from 50 Hz to 60 Hz.
SANS 61481:2005 history
2005SANS 61481:2005 Live working - Portable phase comparators for use on voltages from 1 kV to 36 kV a.c.