Description

The DT**2 three-phase four-wire meter is designed to meet the latest IEC****1 standards for measuring active energy in three-phase four-wire alternating current power grids. Connection is direct or by instrument transformers. It has an average service life of *0 years and maximum overload capacity of **0% Ib. Features: 1. Meter case: it meets the protection requirements set by protection class IP*3 of IEC****9 2. Terminals and terminal block a. Terminals: the connection terminals are made of nickel-plated brass with features of high mechanical strength, good conductivity and corrosion-resistance b. Terminal block: the terminal block is injection molded of heat- and fire-resistant bakelite 3. Rotor: the rotor shaft is turned of high strength aluminum alloy Technical data: 1. Meter type: DT**2 2. Standards: IEC****1, IEC**4 3. Accuracy (according to IEC****1) a. Transformer operated: class 1 b. Direct connected: class 2 4. Average service life *0 years 5. Rating current of transformer in 5A direct connection 6. Reference voltage (Un): 3 x *7. 7/**0V, 3 x **0/**0V, 3 x **0/**0V 7. Reference frequency: *0Hz, *0Hz 8. Non-running with no-load: 0.9~1.1Un 9. Starting current: 0.4%Ib, 0.5%Ib *0. Mean temperature coefficient: from 0.1Ib to Imax at unity PF; from 0.2Ib to Imax at unity 0.5 lagging < 0.*8%/°C < 0.*2%/°C *1. Insulation level: withstand AC voltage for *0Hz, 1min withstand impulse voltage 1.2/*0us > 2kV *2. Basic current (maximum current) A: 1.5(6), 3(6), 5(*0), 5(*0), *0(*0), *5(*0), *0(*0