Valhalla 2300, Operation Manual

Page: 29 / 115

Observe the polarity of the potential
transformer.
Caution! Do not exceed the
common-mode specification of the Model
2300.
6-4-8. Single-Phase Two-Wire CT-PT
Source Power Connections
Some applications require measuring the
power from a source rather than the power
into the load. These connections are shown in
Figure 6-8. When the Model 2300 is
connected in this manner, the watts reading
should be multiplied by minus one (-1) and
the CT-PT ratios. Observe the polarities of
the current and potential transformers. For
best performance the CURRENT COMMON
terminal should be grounded.
6-4-9. Three-Phase Three-Wire Load
Power Connections
Connect the wattmeter as shown in Figure 6-
9.
Caution! Do not run phase B current
through the VOLTS COMMON terminals.
Tap off the phase B wire to connect the
VOLTS COMMON terminals.
6-4-10. Three-Phase Three-Wire CT
Load Power Connections
Connect the wattmeter as shown in Figure 6-
10. Observe the polarities of the current
transformers. The watts reading should be
multiplied by the CT ratio.
Caution! Do not
run the line current through the CURRENT or
VOLTS COMMON terminals.
6-4-11. Three-Phase Three-Wire PT
Load Power Connections
Connect the wattmeter as shown in Figure 6-
11. Observe the polarities of the potential
transformers. The watts reading should be
multiplied by the PT ratio.
Caution! Do not
exceed the common-mode specifications of
the Model 2300.
6-4-12. Three-Phase Three-Wire CT-
PT Load Power Connections
Connect the wattmeter as shown in Figure 6-
12. Observe the polarities of the current and
potential transformers. The watts reading
should be multiplied by the CT-PT ratios. For
best performance ground the CURRENT
COMMON terminals.
6-4-13. Three-Phase Three-Wire Source
Power Connections
Some applications require measuring the
power from a source rather than the power
into the load. These connections are shown in
Figure 6-13. When the Model 2300 is
connected in this manner, the watts reading
should be multiplied by minus one (-1).
Caution! Do not run the phase B current
through the VOLTS COMMON terminals.
Tap off the phase B wire to connect the
VOLTS COMMON terminals.
6-4-14. Three-Phase Three-Wire CT
Source Power Connections
Some applications require measuring the
power from a source rather than the power
into the load. These connections are shown in
Figure 6-14. When the model 2300 is
connected in this manner, the watts reading
should be multiplied by minus one (-1) and
the CT ratio. Observe the polarity of the
current transformer.
Caution! Do not run the
line current through the CURRENT or
VOLTS COMMON terminal. Tap off the line
wires to connect the CURRENT and VOLTS
COMMON terminals.
6-4-15.
Three-Phase Three-Wire PT
Source Power Connections
Some applications require measuring the
power from a source rather than the power
into a load. These connections are shown in
Figure 6-15. When the Model 2300
is connected in this manner, the watts
reading should be multiplied by