Dranetz DBPGFLEX3KPKG User Manual page 226

Overview, continued
This section contains diagrams of both voltage and current probe connections that are
Voltage and
current
required when power measurements are to be made.
connections
Voltage: 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.
Correct phasor diagrams (for resistive loads) are shown for each connection.
Phasor
diagrams
In this appendix The following connections are shown in this appendix.
Verifying Voltage and Current Connections
Single Phase
Split Phase
3 Phase, Four Wire Wye
3 Phase (Floating or Grounded) Delta
3 Phase 2-Watt Delta
Generic Circuit
2 1/2 Element Without Voltage Channel B
2 1/2 Element Without Voltage Channel C
Connecting to a Potential Transformer (PT)
Connecting to a Current Transformer (CT)
Connecting to an Isolated Current Transformer (ISO)
E-4
Topic See Page
E-5
E-7
E-8
E-9
E-10
E-11
E-12
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E-14
E-15
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