YOKOGAWA WT500 User Manual

App-28
IM 760201-01E
Power transformer
DC power U1 and I1 AC power U3 and I3
AC power U2 and I2
U2 (or I2, U3, or I3)
Input element 1
Input element 2
Input element 3
Synchronization Source Setup Example
• Power Transformer with Single-Phase AC Input and Three-Phase AC Output
If a device that converts single-phase AC power to three-phase AC power is connected
and measured as shown in the figure below, set the synchronization source of input
elements on the input end to the same signal and do the same for input elements on
the output end.
In this example, set the synchronization source of input eleme
nt 1 to U1 (or I1), and
set the synchronization source of input elements 2 and 3 to U2 (or I2, U3, or I3).
In this case,
AC signals of different frequencies are measured. If the synchronization
source of all input elements is set to the same signal, the measurement period of
either the input signal or the output signal will not be an integer multiple of the signal.
•
Single-phase AC power: Connect to input element 1.
• Three-phase AC power: Connect to input elements 2 and 3 using a three-phase,
three-wire system.
Power transformer
AC power U1 and I1 AC power U3 and I3
AC power U2 and I2
U1 (or I1)
U2 (or I2, U3, or I3)
Input element 1
Input element 2
Input element 3
Synchronization Source Setup Example
Note
• The measurement period for determining the numeric data of the peak voltage or peak
current is the entire span of the data update interval, regardless of the measurement
period settings discussed above. Therefore, the measurement period for the measurement
functions that are determined using the maximum voltage or current value (U+pk, U-pk,
I+pk, I-pk, CfU, and CfI) is also the entire span of the data update interval.
• The measurement period of harmonic measurement functions is from the beginning of the
data update interval to 1024 points at the harmonic sampling frequency, regardless of the
measurement period settings discussed above.
Appendix 5 Setting the Measurement Period

YOKOGAWA WT500 Specifications

General

Brand	YOKOGAWA
Model	WT500
Category	Measuring Instruments
Language	English