DRT301type three-phase four-wire electronic watt-hour meter is adopted special large scale integrated circuit and international advanced technology, designed particularly, made with fine crafts. Its general goal is the high reliability, it is carried out in every step of designing, producing, testing, aging and exam. Compared with traditional watt-hour meter, it is higher accuracy,
Higher reliability, light and compact. It's easy to realize the expanding the modern managing function, It has the indication of short phase, and puts out the impulse.