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Wiring standards

Wiring standards. Single phase, 2-wire 120V or 220V Single phase, 3-wire 220V between phases ; 110V between phase-neutral Three phases, 3-wire No neutral ; 220V between phases Three phases, 4-wire 220V between phase-neutral ; 380V phase-phase.

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Wiring standards

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  1. Wiring standards • Single phase, 2-wire 120V or 220V • Single phase, 3-wire • 220V between phases ; 110V between phase-neutral • Three phases, 3-wire • No neutral ; 220V between phases • Three phases, 4-wire • 220V between phase-neutral ; 380V phase-phase

  2. Fault Tolerant Energy MeteringAD7751 - monitor phase and neutral currents

  3. Counter kW-H 0 0 9 8 2 3 7 Anti-Tamper 2 wire, 1f Meter ExampleAD7751: 1f, Real Pwr, anti-pilfer, Motor Drive Neutral Input Side Load Side Phase Fault Detection LED ac to dcPower Supply +5V Residential Outllets AD7751 IPhase>INeut IPhase 10011... ADC1A PGA 11100... INeut 11100... 10110... Digital-to- Frequency X PGA ADC1B Line VoltageStepdown IPhase<INeut Digital Comparator * V 11110... ADC2 GainCalibration ReversePolarity LED CalibrationLED *Note: Digital Comparator Selects > of IPhase or INeutral

  4. Counter kW-H 0 0 9 8 2 3 7 Basic 2 wire, 1f Meter Example AD7750/5: 1 f, Real Pwr, Motor Drive output Neutral Load Side Input Side Phase ac to dcPower Supply +5V Residential Outllet AD7750/5 101011... PGA ADC1 Digital-to- Frequency 1101.. Line VoltageStepdown X 111001... ADC2 CalibrationLED GainCalibration ReversePolarity LED

  5. Comm EEPROM ADE7756/3:Processor based Meter Example(remote reading or multi-tariff billing) Neutral Load Side Input Side Phase ac to dcPower Supply +5V Residential Outllet ADE7756/3 1011... PGA ADC1 Registers & Serial Interface 1101.. MCU & LCD Driver X 1101... ADC2 Calibration DTF LCD Display CalibrationLED

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