Electric Watt-hour Meter

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Electric Watt-hour Meter

Three-phase Electric Watt-hour Meter

Description of Three-phase Electric Watt-hour Meter:
The three-phase electric watt-hour meter (four-wire) is designed to meet the latest IEC60521 standards for measuring active energy in three-phase four-wire alternating current power grids. Connection is direct or by instrument transformers. The three-phase electric watt-hour meter has an average service life of 10 years and maximum overload capacity of 600%Ib.

Structure and Features of Three-phase Electric Watt-hour Meter:
1. Meter case
It meets the protection requirements set by protection class IP53 of IEC60529.
2. Terminals and Terminal block
Terminals:
The connection terminals are made of nickel-plated brass with features of high mechanical strength, good conductivity and corrosion-resistance.
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 Parameters of Three-phase Electric Watt-hour Meter

Name Type Accuracy (class) Rated voltage(V) Rated current(A) Connection Mode
Three-phase four-wire active energy watt-hour meter EW-1 2 3×380/220 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×5(20), 3×10(40), 3×15(60), 3×20(80), 3×30(100) Directly input
EW-2 1 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
Three-phase three-wire active energy watt-hour meter EW-3 2 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×5(20), 3×10(40), 3×15(60), 3×20(80), 3×30(100) Directly input
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
EW-4 1 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
Three-phase four-wire reactive energy watt-hour meter EW-5 3 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
EW-6 2 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
Three-phase three-wire reactive energy watt-hour meter EW-7 3 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
EW-8 2 3×380 3×1(2), 3×3(6), 3×1.5(6) Input through current transformer
3×100 3×1(2), 3×3(6), 3×1.5(6) Input through current voltage transformer
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