DTS298 series three phase electrical type watt-hour meter is a kind of whole electrical meter which measure active energy or reactive energy electric energy consumption in frequency 50Hz or 60Hz three phase AC electricity net. The series meter is a new product developed by our company according to market demand and adopts advanced special low power loss solid state ,Concentrative technique and SMT technology, it can indicate user accumulative total electric energy consumption by mechanical register or LCD displayer. It has the following features: high accuracy, strong reliability, wide load, low power loss, level error curve, saving energy and materials etc. The technical performance of active energy three phase watt-hour meter is completely conform to National Standard GB/T 17215-2002 and International Standard IEC6 2053.The technical performance of reactive energy three phase watt-hour meter is completely conform to National Standard GB/T17882-1999 and International Standard IEC1268.