Multifunction Power Meter provides full power acquisition, switching value monitoring, relay output function, and has a strong extended function. The users can flexibly select 2~31 harmonic analysis, off-limit alarm, SOE recording, electrical degree pulse output, demand statistics, etc. and realize dual network communication, support online upgrade, save the power-off data, stably and seamlessly connect with various background system, perfectly implement site level distributed intelligent control to smart substation and unattended station. This Four-Faith power quality analyser/analyzer are widely used in various industries of power supply and distribution system, industrial automation and intelligent network monitoring system. Four-Faith Multifunction Power Meters are designed to meet the rapid development demand of smart grid system.