Hioki 3169-20 Instruction Manual page 191

Wiring Single-phase 2-wire
Item
1P2W
Apparent
S
1k
power
S [VA]
k
*2
Power The reactive-power-meter
phase method is used.
angles
 Q 
φ
k
-1
 
[deg] tan
------- -
k
 P 
k
*7
The reactive-power-meter
method is not used.
 P 
k
-1
 
cos
------ -
S
 
k
*8
*1: The calculation is performed internally, and the result is not
*2: The calculation is performed internally, and the result is not
*3: The phase voltage from a virtual neutral point is used for
*4:
*5:
*6:
*7: When
*8: When
• The subscript numbers represent measurement-channel num-
• The expressions above represent the kth harmonic. In the
Single-phase
3-wire
1P3W
S + S
1k 2k
displayed on-screen, when the reactive-power-meter method is
used. The calculation is not performed when the reactive-
power-meter method is not used.
displayed on-screen.
calculation of , .
P Q
= +
P u I u I
k 1kr 1kr 1ki
= ( -
Q u I u I
k 1kr 1ki 1ki
= - , =
U u u U
1s 1s 2s 2s
: Line to line voltage; u: Phase to neutral voltage from a virtual
U
neutral point
= - - (provided that
I I I
3s 1s 2s
= - (provided that
U U U
3s 1s 2s
φ
= = 0,
P Q
k k
φ
= 0, = 0°.
S
k k
bers. ( : Analysis order)
k
expressions for total values,
Three-phase 3-wire
3P3W2M 3P3W3M
The reactive-power-meter
method is used.
2 2
P Q
+
k k
The reactive-power-meter
method is not used.
3
( )
S S S
-------- + +
1k 2k 3k
3
+ +
u I u I
1ki 2kr 2kr 2ki
)+ ( -
u I u
1kr 2kr 2ki 2ki
- , = -
u u U u u
2s 3s 3s 3s
+ +
I I I
1s 2s
+ +
U U
1s 2s
= 0°.
k
is replaced by K.
k
183
13.1 Formulae
Three-phase
4-wire
3P4W,3P4W4I
S + S + S
1k 2k 3k
+ +
u I u I
2ki 3kr 3kr 3ki
) + ( -
I u I u
2kr 3kr 3ki 3ki
1s
= 0 )
3s
= 0)
U
3s
13
2
3
4
5
6
7
3ki
)
I
3kr
8
9
10
11