True-RMS AC Ammeters Interface Directly With Current Transformers

Enabling dependable measurements in switching power supply applications, the ACA5-20RM series true RMS ammeters interface directly with an external 5A output current transformer and cover input ranges from 100A to 500A. The series is suitable for use in equipment using switching power supplies such as inverters and generators, battery chargers, power distribution units, and ac/dc supplies. The meters scale and display the output of 5A donut-style current transformers. They offer a choice of 85 to 140 Vac or 170 to 264 Vac at 47 Hz to 63 Hz operating supply voltages for each range. Maximum power consumption is less than 50 mA and operating temperature ranges from 0°C to +60°C. Crest factors for the series are as high as five and all models specify 2 kV of isolation between the ac power source and the external 5A transformer. Pricing for ACA5-20RM ammeters is $94 each and $79 each/100. MURATA ELECTRONICS NORTH AMERICA INC., Smyrna, GA. (770) 436-1300.