DTSD3666 Three-phase Electronic Energy Meter is based on the relevant national technical standards, protocols and the majority of the user's actual requirements, the use of advanced technical design of new multi-functional intelligent energy meter, with high precision, good stability, reasonable layout, advanced technology , practical, strong, powerful, easy to operate and so on can be accurately and quickly measure various types of electrical parameters of the calculation. The table performance indicators in line with GB/T17215.321-2008 "1-and 2 AC static watt-hour meter", GB/T17215.322-2008 "0.2S-and 0.55 AC static watt-hour meter", GB/T17215.323-2008 "2-and 3 AC static var-hour meter" and DL/T614-1997 "multi-function watt-hour meter" national standard multi-function watt-hour meter of the technical requirements of its communication line with DL/T645-1997 "multi-function meter communication protocol" requirements.