Voltcraft dpm 3l85 d ac meter for cap rail mounting voltcraft dpm 3l85 d the voltcraft dpm3l85 d is a digital single and three phase meter for measuring energy consumption in kwh when directly connected to an installation four of these units will fit onto a standard din rail integrated into the watthour meter is a pulse output which is proportional to the energy consumed 500 pulses kwh voltcraft dpm 3l85 d alternating current meter for din rail mounting