KNOWLEDGEBASE
(35) Results were found. Showing 31-35.
Why is the Theoretical Calulated Three-Phase Apparent Power Values (ΣVA and ΣS) Different From the Measured Values?
This is due to measurement and calculation error, or differences in calculation methods. On the WT, the three-phase apparent power (ΣS) equation is calculated under the assumption of a balanced condition (the absolute...
item: 1262 | http://tmi.yokogawa.com/sg/service-support/faqs/1262/
Why are the Measured Values Negative When Measuring a Balanced Three-Phase Load?
In the three-phase three-wire, or 3V3A wiring scheme, the phase angle of voltage and current input to each input differs from that of the actual load because it is the line to line voltage that is measured. In three-pha...
item: 1261 | http://tmi.yokogawa.com/sg/service-support/faqs/1261/
Why are the Measurement for Voltage, Current, and Power in Normal Mode Different Than Harmonic Mode?
The difference in measurement values can be attributed to the difference in calculation methods for normal mode and harmonic mode. The voltage, current, and power in normal mode are displayed as the total of the measu...
item: 1265 | http://tmi.yokogawa.com/sg/service-support/faqs/1265/
How Much Time is Required to Print Using the Internal Printer When Performing Harmonic Analysis?
Output function: HArWhen the default output item is set to 1, the printout time for up to the 50th order is about 116 seconds. The printout time for up to the 25th order is about 75 seconds. Output function: HArWhen the ...
item: 1134 | http://tmi.yokogawa.com/sg/service-support/faqs/1134/
Why are the Measured Values for RMS and MEAN of a Sine Wave Incorrect?
The waveform may actually not be a pure sine wave. Even though a 50/60 Hz sine wave is expected, the following factors may be involved: The waveform is slightly distorted (harmonic components are mixed in) Small amount...
item: 1254 | http://tmi.yokogawa.com/sg/service-support/faqs/1254/
