KYORITSU 6315 Instruction Manual - Manual (Page 139)

Items to be calculated KEW6315
- 137 - KEW6315
Items to be calculated
Apparent power S [VA]
Range Same as active power.
Displayed digit Same as active power.
Accuracy ±1dgt against each calculated value (for sum : ±3dgt)
Sign No polarity indication
Equation S
c
＝ V
c
×A
c;
when P
c
>S
c,
regarding P
c
＝ S
c
. c: Measurement channel
1P2W-1 to 4 S
1,
S
2,
S
3,
S
4,
S
sum
＝ S
1
+S
2
+S
3
+S
4
1P3W-1 to 2 S
1,
S
2,
S
sum1
＝ S
1
+S
2
S
3,
S
4,
S
sum2
＝ S
3
+S
4
S
sum
＝ S
sum1
+S
sum2
3P3W-2 S
1,
S
2,
S
sum1
＝√ 3/2( S
1
+S
2
)
S
3,
S
4,
S
sum2
＝√ 3/2( S
3
+S
4
)
S
sum
＝ S
sum1
+S
sum2
3P3W3A S
1,
S
2,
S
3,
S
sum
＝ S
1
+S
2
+S
3 * Phase angles are used.
3P4W S
1,
S
2,
S
3,
S
sum
＝ S
1
+S
2
+S
3
Reactive power Q [Var]
Range Same as active power.
Displayed digit Same as active power.
Accuracy ±1dgt against each calculated value (for sum : ±3dgt)
Sign － : leading phase (current phase against voltage)
＋ (no sign) : lagging phase (current phase against voltage)
Harmonics reactive power is calculated per ch, and the polarity sign of the
reversed basic waveform is displayed.
Equation
Q
c
＝
2 2
c c
P S sign
−
sign: Polarity sign , c: Measurement channel
1P2W-1 to 4
Q
1,
Q
2,
Q
3,
Q
4,
Q
sum
＝ Q
1
+Q
2
+Q
3
+Q
4
1P3W(3P3W)-1
to 2
Q
1,
Q
2,
Q
sum1
＝ Q
1
+Q
2
Q
3,
Q
4,
Q
sum2
＝ Q
3
+Q
4
Q
sum
＝ Q
sum1
+Q
sum2
3P3W3A(3P4W)
Q
1,
Q
2,
Q
3,
Q
sum
＝ Q
1
+Q
2
+Q
3