8.3 Measuring
Press the Start
button to perform the knee
point and turns ratio measurements in a
completely autonomous fashion
successively for each selected winding.
The measurement can be adjusted in the
Setup screen. Please see Section 8.6, for
more details. The name plate of the CT
under test and its characteristics can be
entered prior to the measurement on the
Info screen.
The user simply has to press the Surveillance switch during the automatic measurement process.
The red area marks the hazardous output voltage that could harm persons. To ensure the user is
aware of the situation, the Surveillance switch needs to be pressed and hold on while the output
voltage is above the limit. The red area would disappears when the surveilance swith is pressed.
The progress is displayed on the screen while each winding is measured. The live view contains a
large square log-log graph on the left. The output voltage and current are marked with the cross
and are listed on the right as well. During the Excitation process the curve is drawn as a bold line.
The previously recorded curves are displayed as thin lines.
The winding tap under the test is displayed
on the top right corner along with the
measurement steps (Degauss, Excitation
and Turns ratio). The background of this
field changed according to the potential
risk. The background is red during the
Degauss process and is orange during the
Excitation and Turns ratio processes.
To abort the measurement press
Stop or
press the Emergency switch. If the
Surveillance switch is released while the
output voltage is harmful, the measurement
stops as well.
Chia sẻ với bạn bè của bạn: