16
RMO40TD Getting Started
The
Ready
state displays the selected test current and memory location. If one of these values has to be
changed, press
STOP
to return to the
TapC
menu.
The flashing green LED indicates that RMO40TD is now ready to start the test. Press
START
to run
a test. At the start of the test, a cable connection check is done. In case of e.g. a disconnection, an
alarm is activated and the error message is shown on the display
During the period of current stabilization, both the green and the red LEDs flash alternately and
message “WAIT” is shown on display.
When the current is stabilized, the device shows test current (here
9,98 A
) and the value of the measured
resistance (here
567,2
mΩ
).
At the moment the resistance result is stable, press
Ω
to save the resistance result of the Tap Changer
starting position. The memory position is automatically switched over to the next one and device is ready
to record the current ripple.
During saving the resistance the red LED flashes shortly and beeper sound is speeded up.
Change the Tap Changer position to the next tap by pushing "Up" or "Down" of the tap changer control.
Because the resistance is changed, current will be unstable and RMO40TD will sample and hold the
largest measured current ripple that occurred in the actual measuring cycle. It is indicated as RIPPLE
(%) with reference to the test current.
The display shows the value of the test current in new tap position (here
9,82 A
), and the value of the
current ripple occurred during the change from previous position to the new one (here
4,7 %
). At the
moment the test current shown on the display is stable, the RMO40TD shows the resistance value in
new tap position (here
569,8
mΩ
). P
ress
Ω
to save the resistance and the ripple in the new position of
Tap Changer.
Figure 6-12:
The
Ready
state
before the test
Figure 6-15:
The
TapC
menu,
memory position is
increased for one
Figure 6-13:
The
TapC
menu when the test
current is stabilized
Figure 6-14:
The
TapC
menu,
change the tap
position
