|
For
angular phase offset in degrees
Phase angle indicates the lead or lag in degrees from 0º to
360º between two periodic signals having the same period. In
the illustration to the right, phase angle is 360*P1/P. The
signals are applied to the A and B input channels.
Phase angle measurement is commonly used with AC power from
50 Hz to 400 Hz. Phase angle needs to be set to zero to
synchronize AC generators. It also applies to the triggering
of SCRs and Triacs for power control. The phase angle
between AC current and voltage determines power factor. The
Laureate phase angle meter provides exceptionally fast
response and high accuracy for low frequencies, such as AC
line frequency.
Phase angle measurement with the Laureate™ Phase Meter
requires that two signals with identical periods be applied
to Channels A and B. A display from -180º to +180º is
obtained by timing the rising edge of one channel and the
falling edge of the other channel, and programming a 180º
offset. A resolution of 1º, 0.1º or 0.01º is selectable.
Accuracy is 0.01% up to 100 Hz, 0.1% at 1 kHz, and 1% at 10
kHz.
Phase angle
is determined by timing crystal clock pulses over a
specified gate time which is selectable from 10 ms to 199.99
s. By selecting the minimum gate time of 10 ms, the update
rate can be up to 20/s for 50/60 Hz AC line frequency.
Improved accuracy is obtained by making the gate time long
enough so that multiple cycles can be averaged.
PLEASE SEE TECHNICAL INFORMATION - PDF FOR COMPLETE
INFORMATION |