Keysight Technologies IntegraVision PA2201A Series

Equations for three-phase wiring groups
In the following table, subscript numbers refer to the channel number in the wiring group. For
example, V
2
is the voltage on leg 2. The subscript "n" means "neutral." For example, V
1n
is the
voltage from leg 1 to neutral.
Equations in table are shown for AC+DC meas mode and calculate RMS using the formula:
∑
RMS x x=
N
n
N
n
1
=0
1
2








−
3P-3W-2M 3P-3W-3M 3P-4W-3M
Voltage as Wye
( )
V RMS v= −
n
v v
1 1
+
3
1 2
( )
V RMS v= −
n
v v
2 2
+
3
1 2
( )
V RMS= −
n
v v
3
+
3
1 2
( )
V RMS v= −
n
v v
1 1
−
3
1 2
( )
V RMS= −
n
v v
2
−
3
1 2
( )
V RMS v= − −
n
v v
3 2
−
3
1 2
V RMS v= ( )
x x
( )
V V V V= + + / 3
avg n n n1 2 3
( )
V V V V= + + / 3
avg 1 2 3
Voltage as Delta
V RMS v= ( )
13 1
V RMS v= ( )
23 2
V RMS v v= ( − )
12 1 2
V RMS v= ( )
12 1
V RMS v= ( )
23 2
V RMS v= ( )
31 3
V RMS v v= ( − )
12 1 2
V RMS v v= ( − )
23 2 3
V RMS v v= ( − )
31 3 1
( )
V V V= + / 2
avg 13 23
( )
V V V V= + + / 3
avg 12 23 31
Current
I RMS i= ( )
1 1
I RMS i= ( )
2 2
I RMS i i= (− − )
3 1 2
I RMS i= ( )
3 3
( )
I I I= + / 2
avg 1 2
( )
I I I I= + + / 3
avg 1 2 3
I RMS i i i= ( + + )
n 1 2 3
Power
P AVG v i= ( * )
x x x
P AVG v i= ( * )
n1 1 1
P AVG v i= ( * )
n2 2 2
P AVG v i= ( * )
n3 3 3
P AVG v i= ( * )
x x x
P P P= +
sum 1 2
P P P P= + +
sum 1 2 3
Keysight IntegraVision PA2200 Series Power Analyzers Operating and Service Guide119