Watts and vars – Measurement Computing WavePort 312P rev.1.0 User Manual
Page 82

Glossary
11-6 Glossary
PowerVista/312 User’s Manual
Watts and Vars
Fundamental Watts and Vars are defined from pre-calculated voltage and current vectors via the power
equation. In the equation below, S, V and I are complex vectors while P and Q are scalars.
S
60
= P
60
+ jQ
60
= V
60 ••••
I
60
*
RMS Watts and Vars are defined from the power equation as well. Vrms and Irms below are pre-calculated
magnitudes, and magnitude of complex power is on the left. S is termed volt-amperes, VA or KVA or MVA.
S
RMS
= V
RMS
••••
I
RMS
To determine RMS Watts and Vars, we need either P
rms
or Q
rms
. It is known that average power is also RMS
power or:
P
AVE
= P
RMS
Given that P
ave
is pre-calculated, RMS vars can be determined from:
Q
RMS
= SQRT[
S
RMS
2
- P
AVE
2
]
See also other documents in the category Measurement Computing Hardware:
- ACC-300 (7 pages)
- AI-EXP32 (20 pages)
- AI-EXP48 (19 pages)
- BTH-1208LS (30 pages)
- 6K-ERB08 (32 pages)
- BTH-1208LS Quick Start (4 pages)
- 6K-SSR-RACK08 (33 pages)
- BTH-1208LS-OEM (27 pages)
- CB-COM-Digital (68 pages)
- CB-7018 (68 pages)
- CB-7000 Utilities (44 pages)
- CB-7080D (74 pages)
- CB-COM-7033 (44 pages)
- CB-COM-7017 (72 pages)
- CB-COM-7024 (76 pages)
- CB-NAP-7000P (36 pages)
- CIO-DAC02/16 (16 pages)
- CIO-DAC02 (18 pages)
- CB-NAP-7000D (56 pages)
- CIO-DAC16-I (16 pages)
- CIO-DAC16/16 (20 pages)
- CIO-DAS08 (21 pages)
- CIO-DAC16 (20 pages)
- CIO-DAS08/JR (16 pages)
- CIO-DAS08/JR/16 (14 pages)
- CIO-DAS08/JR-AO (16 pages)
- CIO-DAS08-AOM (32 pages)
- CIO-DAS08-PGM (28 pages)
- CIO-DAS16/330 (34 pages)
- CIO-DAS48-I (17 pages)
- CIO-DAS16/M1 (38 pages)
- CIO-DAS48-PGA (18 pages)
- CIO-DAS800 (20 pages)
- CIO-DAS802/16 (22 pages)
- CIO-DAS6402/16 (40 pages)
- CIO-DAS-TEMP (20 pages)
- CIO-DDA06/16 (18 pages)
- CIO-DDA06/JR (17 pages)
- CIO-DIO24H (20 pages)
- CIO-DIO24/CTR3 (21 pages)
- CIO-DI192 (24 pages)
- CIO-DDA06 (21 pages)
- CIO-DIO48 (19 pages)
- CIO-DO192H (16 pages)
- CIO-DIO192 (20 pages)