14
RMO30T Getting Started
In the
TapC
menu, define a test current for the test (here
10A
).
To do so, set the value of your choice by means of the
UP/DOWN
buttons. In the TapC menu of
RMO30T, current output value is rated continuously at 10A or less. Define the memory position (here
m:87
). Using button
RIGHT
move the cursor to the memory location position, then using
UP/DOWN
select
desired memory position to which obtained results would be saved.
By pushing the
Ω
button, resistance and current ripple measured results will remain registered in internal
memory of RMO30T, and the memory position is automatically switched over to the next memory
position. These results can be recalled later by selecting that position number.
Note:
Only Ch:1 (left channel) is active channel.
Measuring with RMO30T
Before a test can be started, test current and memory position need to be defined using the
TapC
menu.
Once these parameters are defined, press
ENTER
to change to the
Ready
state.
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 RMO30T is now ready to start the test. Press the
START
button 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, buzzer
beeps and message “WAIT” is shown on display.
When the current is stabilized, press the
OMEGA
button to start the resistance measurement of the Tap
Changer starting position.
During the resistance measurement the red LED flashes shortly and beeper sound is speeded up.
The display shows test current (here
9,97A
) and the value of the measured resistance (here
704,2m
Ω
).
The value of the resistance is displayed and after 5 seconds it disappears. The memory position is
automatically switched over to the next memory position and device is ready to record the current ripple.
Change the Tap Changer position to the next tap by pushing the "Up" or "Down" button of the tap
changer control. Because the resistance is changed, current will be unstable and RMO30T will sample
and hold the largest measured current ripple that occurred in the actual measuring cycle. It is indicated
as
Δ
(%) with reference to the test current.
The test current has changed (here
9,93A
). Display shows the new value of test current and the value of
the current ripple (here
4,6%
). At the moment the test current on the display is stable, press the
OMEGA
Figure 6-11:
The
Ready
state
before the test
Figure 6-13:
The
TapC
menu during
the resistance test
Figure 6-12:
The
TapC
menu during current
stabilization
Figure 6-14:
The
TapC
menu,
memory position is
increased for one
