The digital panel mounted measuring device umg 507e is used for reading and recording of short breaks with 64 cycles pre trigger the three phase electronic device detects anddigitalises the rms currents and voltages true rms in a 5060 hz power all measured values are continuously measured at intervals of 200 ms over 10 periods 50 hz and recorded by this a reliable detection of short time interruptions with fault recorder functionis possible for short term events an actual recording of