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Download AC Watt & Var Transducer
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AC Watt & Var Transducer Model SPW...WATT / Model SPK...Var · 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 MODEL...SPW...SPK 101 - 1 phase 2 wires / 1 element 201 - 3 phase 3 wires / 2 elements 301 - 3 phase 4 wires / 3 elements Description HC model SPW-WATT & SPK-VAR transducers are designed to be an accurate unit, conversion by principle of time devision multiplier as a function of sampling duty cycle as voltage & amplitude as current. Rugged steel enclosure of magnetic field immunity & high electrical over capability, the units feture stable & reliable field operation as industry, laboratories & process control for power measurement. Specification 1.Accuracy 2.Input ( each element ) 0.25% RD + 0.02%RO / 23 ± 3°C Range Over capability Effective voltage 85-150V; current 0-6A 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; Var 60Hz only Protection Full protection for SURGE, EMI & RFI 3.Output ( isolated with input ) Range Outputload Outputimpedance Response time Ripple Long term stability Temperaturestability Adjustment Protection Magnetic effection DC 0 to ±1mA DC 0 to ±1mA calibration vs 0 to ± 500W / ± 500Var ... 1ø2W / 1 element 0 to ± 1000W / ± 1000Var ... 3ø3W / 2 elements 0 to ± 1500W / ± 1500Var ... 3ø4W / 3 elements Maximum 10Kohm for 0 to ±1mA ouput > 30 Mega ohm < 400 ms from 0 to 99% RO at operating < 0.5% P-P RO < 0.1% RO per year ( typically ) < 0.01% per degree C, from 0 to 55°C Span ± 5% / 10%; zero ± 2.5% / 5% on request No damage ... open or short; full prtection ... SURGE, EMI, RFI < 0.04% at center 400 A-T / M 4.Power supply 5.Operation condition AC115 ± 20%, 50-70Hz, < 3VA Environment Temperature Humidity Elevation Magnetic field Waveform -5 to 60°C 20 to 99% RH non condensed Under 3000 meters 500 A-T / M Watt - fundamental with 20% 3rd harmonics Var - sinusoidual 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, IEC 255-3, 6KV ( 1.2 x 50 us ), 3KA ( 8 x 20 us ) .... current only Surge test ( ring wave ) IEEE 587/1983 ( 3KV - 0.5us / 100KHz ) IEC 255-3 ( 2.5KV - 025ms / 1MHz ) Terminal Connection *Terminal 1 & 2 for SPW-Watt only, terminal 3 & 4 for SPK-Var only SPW 101 / SPK 101 1phase2wires W+ W- Q+ Q- SPW 201 / SPK 201 3phase3wires Pm Pn W+ W- Q+ Q- SPW 301 / SPK 301 3phase4wires P1 P2 P3 W+ W- Q+ Q- P0 P1 P2 P3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Output Output Watt Var Output Output Watt Var Output Output Watt Var M N Load R S T Load Power Power R S T N Load Power 9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 1S 1S 1S 2S 3S 1L 2L 3L 1L X Y 3S 1L 3L X Y X Y