The DTS866-type three-phase four-wire electronic active electronic energy meter, using the energy measure in the electricity sector, factories, businesses, commercial, agriculture, power, lighting equipment, the table with the imported special large-scale integrated circuits, 16 A / D converter, digital multipliers and digital sampling processing and SMT techniques, based on actual industrial electrical conditions in the design, manufacture a new type of energy meter. Used to measure the frequency of 50Hz AC three-phase active energy and power of degrees, intuitive readings easy meter reading, the instrument can be extended infrared and RS485 communication function for three-phase energy measurement provides advanced, reliable measurement tool. The table metering module can accurately measure the three-phase positive and negative bi-directional active energy. Accurate measurement, stable and reliable, with good anti-electromagnetic disturbance, low power consumption, high accuracy, anti-tampering, wide range, long life and other characteristics. This instrument conforms to standard DL / T 645-1997 multifunction table communication Statute and GB / T 17215.321-2008 Level 1 and 2 Static AC Power Meter ". Basic error (load balancing basic error limit) Note: (b is the basic current In Rated current Imax maximum current) load balancing current percentage error limit of two tables ± 3.0. 2.3 starting in the reference voltage, reference frequency and power factor of 1.0 under the conditions, the load current 0.004Ib (2 level), 0.005Ib (level) meter should be able to start, and continuous measurement of energy. 2.4 creep voltage circuit plus 1.15 times the reference voltage, the current line is no current test output of the meter should not produce more than one pulse. 2.5 operating voltage range of normal operating voltage: 0.9Un ~ 1.1Un limit working voltage: 0.0Un ~ 1.15Un 2.6 power voltage line power consumption: ≤ 2W (10VA) Current circuit power consumption: ≤ 4.0VA normal operating temperature of 2.7 Environmental conditions: -10 ℃ ~ +45 ℃, operating limit temperature: -25 ℃ to +55 ℃, storage and transport temperature: -25 ℃ ~ +70 ℃ Relative humidity: Annual average ≤ 75% 2.8 Dimensions: 230mm × 145mm × 70mm ; 2.9 Weight: about 1.5kg; the 2.10 safety performance: product complies with GB / T 17215.321-2008 the safety indicators and requirements. 2.11 power display 6 of degrees, five integer, a decimal. 3 main functions 3.1 energy metering functions: energy metering functions: active energy metering. Three-phase power supply, a phase or two-phase power outage, the measurement accuracy is not affected. 3.2 output interface: with optocoupler isolation active and passive pulse output interface. 3.3 phase loss indication function to indicate whether the lack of phase: three light-emitting tube, three light-emitting tube representing the A, B, C three-phase, a