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Gossen Metrawatt MAVOWATT 20 Manual

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E-4
Overview, continued
Voltage and
current
connections
This section contains diagrams of both voltage and current probe connections that are
required when power measurements are to be made.
Vo lta g e
: Voltage probes are connected to the individual source or load line and are
referenced to the return (common) line voltage probe connection for greatest accuracy.
Current
: Current probes are connected to each line and positioned to measure currents
with reference to the voltage probe. Incorrectly positioned current probes may produce
erroneous power measurement. Current probes are always oriented with the arrow
pointing to the load.
Phasor
diagrams
Correct phasor diagrams (for resistive loads) are shown for each connection.
In this appendix
The following connections are shown in this appendix.
Topic See Page
Verifying Voltage and Current Connections E-5
Single Phase E-7
Split Phase E-8
3 Phase, Four Wire Wye E-9
3 Phase 2-Watt Delta E-10
2 1/2 Element Without Voltage Channel B E-11
2 1/2 Element Without Voltage Channel C E-12
Connecting to a Potential Transformer (PT) E-13
Connecting to a Current Transformer (CT) E-15
Connecting to an Isolated Current Transformer (ISO) E-16
… 187 …


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