EMM620 three-phase voltmeter display magnification, mailing address, baud rate, etc. through the panel buttons can be arbitrarily set, very flexible and easy to use. Describe: EMM620 three-phase voltmeter AC sampling technology True RMS measurements, capable of simultaneously measuring grid in the current programming and magnification through the panel buttons. Highly cost-effective with easy installation, simple wiring, maintenance facilities, a small amount of engineering, field programmable input parameters such as features, and can be completed with the industry PLC, industrial computer networking communication. The main application areas are: industrial power distribution automation systems / substation automation systems / power plant auxiliary power system / low voltage switch cabinet / intelligent building electrical engineering / energy efficiency management system customers are using the product: Yam Tat Group, Handan Iron and Steel fine steel Engineering, Tibet Radio, Xuzhou Thai Special Steel Factory, Shandong billion Yang Electric Co., Ltd., Tianjin Steel, Chengde Steel, Handan Steel, Shanxi Haixin Steel.