PAC5000 series products are multi-function power analysis instrument panel installation, support for external measurement of voltage and current transformer connection type, able to support a variety of electric parameter measurement analysis, such as voltage, current, the four quadrant power parameters, power factor, total harmonic and harmonic contain quantity, not balance, crest factor, etc., At the same time can provide a variety of energy parameters measurement, such as two-way active power, reactive power, monthly and daily electricity consumption statistics. This series of products can support in the single phase two lines, two phase three line, the three-phase three-wire and three-phase four-wire grid environment analysis of electric power parameter measurement, and at the same time providing multi-channel digital input/output interface, and article 30 of the event log function, is suitable for real time power monitoring and control system, the energy consumption management system, industrial monitoring site using a variety of applications such as environment, has the multi-function, Multi-purpose, high stability and long life. This series of products can support the access of external voltage transformer (PT) and current transformer (CT), the maximum current up to 9999A, maximum voltage up to 600kV. The product has a built-in RS485 communication interface, the highest baud rate support 38400bps, Modbus, DL/T645 and other communication protocols. This series of products comply with IEC61010, IEC61326, IEC62053, IEC61557, EN50470 and other international standards.