Wiring Power Meters Ben Kemink. FORESIGHT INNOVATION QUALITY Subjects covered: to re-wire an incorrect NEGATIVE average power situation. to connect Single-Phase,

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Presentation transcript:

Wiring Power Meters Ben Kemink

FORESIGHT INNOVATION QUALITY Subjects covered: to re-wire an incorrect NEGATIVE average power situation. to connect Single-Phase, Two-Phase, Three-Phase- Three-Three-Wire and Three-Phase-Four-Wire loads. to connect safely measurement transformers between the loads and power meters. more about the magic of the virtual ground box

FORESIGHT INNOVATION QUALITY Why ring?

FORESIGHT INNOVATION QUALITY

FORESIGHT INNOVATION QUALITY i u SourceWiringLoad Make a drawing

FORESIGHT INNOVATION QUALITY Positive “DC” + - I U

FORESIGHT INNOVATION QUALITY Negative “DC” - + U I

FORESIGHT INNOVATION QUALITY Always: First Connect the Current !  i  u i v + - Wiring Sequence

FORESIGHT INNOVATION QUALITY Correct Connection The sign of the current is positive, when the current flows from [I] terminal to [±] terminal inside the powermeter shunt. The sign of the voltage is positive when the voltage of the [V] terminal is higher than [±] terminal.  I  V i v + -  I  V i v + -

FORESIGHT INNOVATION QUALITY The voltage source increases and the current also

FORESIGHT INNOVATION QUALITY Incorrect Voltmeter connection v i p P active The power meter displays negative value for average power.  I  V i v + - The source voltage decreases but the current increases.

FORESIGHT INNOVATION QUALITY Incorrect Current meter connection v i p P active  I  V i v + -

FORESIGHT INNOVATION QUALITY Connect CURRENT METER if possible in RETURN WIRE Return wire is at lower voltage than “HOT” wire, after the voltage drop in the load.

FORESIGHT INNOVATION QUALITY Wiring Single-Phase Three-Wire

FORESIGHT INNOVATION QUALITY Wiring Three-Phase Four-Wire

FORESIGHT INNOVATION QUALITY Wiring Three-Phase Three-Wire

FORESIGHT INNOVATION QUALITY Wiring Yokogawa Three-Voltage Three-Current

FORESIGHT INNOVATION QUALITY The Only Correct Way to Measure the Phase Voltage!

FORESIGHT INNOVATION QUALITY THREE PHASE SYSTEMS Artificial Neutral Justification that P total correct is with Virtual Ground Box

FORESIGHT INNOVATION QUALITY

FORESIGHT INNOVATION QUALITY Single-Phase Two-Wire, with PT & CT

FORESIGHT INNOVATION QUALITY Single-Phase Three-Wire, with PT & CT

FORESIGHT INNOVATION QUALITY Three-Phase Three-Wire, with PT & CT

FORESIGHT INNOVATION QUALITY Three-Phase Four-Wire, with PT & CT

FORESIGHT INNOVATION QUALITY Thank you and success!

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