JWT5303 three-phase standard watt-hour meter is a kind of multi-function high-accuracy intelligent watt-hour measurement instrument which is designed with most advanced digital electronic technology end uses high-speed DSP processor, as its core technology. It comprises of high-speed DSP processor, two-way current frequency converter, digital controller, and digital display. Its voltage and current inputs are separated by passive transformer, so it is a kind of watt- hour measurement instrument with wide current measurement range, two-way current measurement capability, high accuracy, good stability, high overloading capacity, and strong practicability.
Technical Parameters
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Input parameters
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Voltage input
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Input voltage（V）
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40-480
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Input voltage range(v)
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60、120、240、480
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Overloading capacity(v)
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600
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Input load
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≤0.5mA(480v)
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Current input
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Input voltage(a)
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0.01-100
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Input voltage(a)
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100,50,25,10,5,2.5,1,0.5,、0.25,0.1,0.05,0.025
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Overloading capacity(a)
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150
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Input load
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≤0.3mΩ（100A-20A≤6mAΩ（10A-0.01A）
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Output pulse frequency
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fH=CH.p/3600(Hz) fL=fH/10000(Hz)
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Output signal: TTL signal
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Power consumption:15VA
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Pre-heating time:30Min
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accuracy
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accuracy
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Grade 0.02,0.03,0.05,0.1
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Power accuracy
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Active power accuracy
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0.05%、0.1%（pf≥0.5）
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Reactive power accuracy
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0.1%、0.2%（pf≥0.5）
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Watt-hour accuracy
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Active watt-hour accuracy
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0.05%、0.1%（pf≥0.5）
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Reactive watt-hour accuracy
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0.1%、0.2%（pf≥0.5）
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Displayed contents
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Three-phase/ four-line voltage (Uan,Ubn,Ucn)
Three-phase/three-line voltage(Uab,Ubc,Uca)
three-phase current (la,lb,lc(A)) ,Active power(p(w))/apparent power(s(va)) Power factor(p1)/phase angle(￠),Input signal frequency(f)
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Power supply
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220v±10%、50Hz±5%
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Relative humidity
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≤85%No corrosive gasses exist
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Outer dimensions
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482mm×420mm×140mm
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Operating environment : Temperature5℃-40℃
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Total weight :About 9kg
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