Wago current measuring transducer ac dc 0 1a 0 5a wago 857 550 the wago current measuring transducer ac dc 0 1a 0 5a is used to measure ac and dc currents ac dc 0 1a as well as ac dc 0 5a it can record sinusoidal and optionally also non sinusoidal signals true rms measurement the current transducer converts the output current into an analogue standard signal wago 857 550 current measuring transducer ac dc 0 1a 0 5a