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Deni 5300 Specifications Page 14

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8
Magtrol Model 5300 Three Phase Power AnalyzerChapter 3 - Connecting the 5300
3-PHASE, 4-WIRE WYE CONNECTIONS
Figure 5. 3-Phase, 4-Wire WYE Connections
INPUT AMPS OUTPUT VOLTS
Ø1
Ø2
Ø3
HIGHLOW
EARTH
1
SURGE PROTECTION NOT SHOWN
5300 PA
R
R
W B
B
W
W B
R
Ø1
Ø2
Ø3
R
R
R
L1
L2
L3
NEUTRAL
LINE
1
FOR BALANCED SYSTEM
LINE
I
PHASE
=
I
LOAD
CB
VOLTAGE SENSE
LOAD
3
LINE TO LINE
VV
PHASE
=
LOAD
L
O
A
D
Power conversion formulas for the 3-phase 4-wire WYE connection are the same as for the DELTA connection,
above. Each phase power is displayed on the 5300 PA by selecting the DISPLAY - Ø
1
,Ø
2
or Ø
3
push switch. The
total power is displayed on the 5300 PA by selecting DISPLAY - ΣK
W
push switch. Also, the general discussion for
Figure 1 (surge protection) and Figure 2 (single phase & DC connection) apply.
3-PHASE, CURRENT AND POTENTIAL TRANSFORMER CONNECTIONS
Figure 6. 3-Phase, Current and Potential Transformer Connections
INPUT AMPS OUTPUT VOLTS
R
R
WB
BW
BW
R
R
R
1
O
2
O
3
O
3
O
O
2
O
1
HIGHLOW
EARTH
5300
PA
PT
CT
CT
CT
PT
PT
PHASE
1
LINE
PHASE
2
PHASE
PHASE
1
PHASE
2
PHASE
LOAD
MAINTAIN POLARITY
THREE PHASE CURRENT
AND POTENTIAL TRANSFORMER
CONNECTIONS
R
Voltage and current measurement ranges can be extended by using current and potential transformers. Frequency
response of the measurements will be determined by the characteristics of the transformers used. The current
transformer (CT) and the potential transformer (PT) are shown located near the 5300 PA. The line voltage drop can
be eliminated from the power calculations by connecting the PT at the load.
Also, the general discussion from Figure 1 (surge protection) and Figure 2 (single phase & DC connection) apply.
See Section 5, CT/PT Installation for more information.
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