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Power Transducer

SPW301-Metal Case

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HC model SPW-WATT transducer is designed to be an accurate unit, conversion by principle
of time division multiplier as a function of sampling duty cycle as voltage & pulses amplitude as current.
Rugged steel enclosure of magnetic immunity & high electrical over capability, the units feature stable
& reliable operation as industry, laboratories & process control for power measurement.

SPW301 use in 3 phase 4 wires / 3 elements system.
  • Standard output with 0 to 1 mAdc
  • Accuracy of reading base 0.25% reading + 0.02% ro
  • High magnetic field immunity
  • Meets IEEE SWC test standards
  • Accuracy : 0.25% RD + 0.02%RO / 23 ± 3 °C
  • Input ( each element ) :
    • Range
      • Effective voltage 85-150V; current 0-6A
      • Nominal voltage 120V current 5A
    • Over capability :
      • Voltage 200V continuous ; 250V ... 10sec / hour; 500V ... 2sec / hour
      • Current 15A continuous ; 50A ... 10sec / hour ; 250A...1sec / hour ; 400A ... 0.5sec / hour
    • Burden : Voltage < 0.1VA at 120V input ; current < 0.2VA at 5A input
    • Frequency : Watt 57-63Hz
    • Protection : Full protection for SURGE, EMI & RFI
  • Output ( isolated with input ) :
    • Range :
      • DC 0 to ± 1mA
      • DC 0 to ± 1mA calibration vs 0 to ± 1000W
    • Output load : Maximum 10k ohm for 0 to ±1 mA output
    • Output impedance > 30 Mega ohm
    • Response time < 400 ms from 0 to 99% RO at operating
    • Ripple < 0.5% P-P RO
    • Long term stability < 0.1% RO per year ( typically )
    • Temperature stability < 0.01% per degree C, from 0 to 55°C
    • Adjustment : Span ±5% / 10%; zero ±2.5% / 5% on request
    • Protection : No damage ... open or short; full protection for SURGE, EMI, & RFI
    • Magnetic effect < 0.04% at center 400 A-T / M
  • Power Supply : AC 115 ± 20%, 50-70Hz, < 3VA
  • Operation Condition : (Environment)
    • Temperature Environment: -5 ~ 60 °C
    • Humidity : 20~99% RH non condensed
    • Elevation : Under 3000 meters
    • Magnetic Field : 500 A-T / M
    • Waveform : Fundamental with 20% 3rd harmonics
    • Power Factor : Any
    • Dielectric strength : 4kV AC rms 1 minute between input / output / power / case ; IEC 688
    • Impulse Test : ANSI C37.90 / 1989, IEEE 587 / 1983, IEC255-3, 6KV (1.2 * 50 us), 3KA (8 * 20 us) ..... current only
    • Surge Test (ring wave) : IEEE 587 / 1983 (3KV - 0.5 us / 100 KHz), IEC255-3 (2.5KV - 0.25ms / 1MHz)
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