MT-30
Installation, Operation & Maintenance
06225-03H.doc
27 of 47
AeroVironment, Inc
test, as described below. Once a test is completed, the user should select Standby Mode
to open the contactors and internally isolate the load.
4.10.1 Selecting Mode
At the start of a test in local operation, the
Mode
buttons will be flashing on the
front panel. To select Voltage Control Mode, press the flashing green button
next to the VOLTAGE display.
This button will stop flashing and remain lit, while the other mode buttons
(CURRENT, POWER and STANDBY) stop flashing and remain unlit. Similarly,
to select Current or Power Mode, press the green button next to that display.
When you select a control mode, the DC Converter will immediately close the
contactors to connect the load (you will hear an audible click). The DC Converter
is now ready for adjustments in the control setting.
4.10.2 Adjusting Setting
Once the DC Converter is running in either Voltage, Current, or Power Control
Mode, you may adjust the setting for that mode as often as necessary.
Adjustments are made via the up and down arrows located next to the appropriate
display.
For example, if the system is in Current Control Mode (CURRENT mode button
lit), adjustments would be made by pressing the Up Arrow (
×
) or Down Arrow
(
Ø
) buttons next to the current display. To make small changes, press the button
and release it as many times as needed. To make larger changes, press the button
and hold it down until the desired setting is reached.
1.
You may not adjust the setting to a value that is outside the operating limits
you have defined for the parameter you are controlling.
Example
If the upper current limit is + 50 Adc, and the system is operating in
Current Mode, you may only raise the current setting (i.e., the
commanded
current) up to + 50 Adc. The DC Converter will prevent
any increases above this level.
2.
If the DC Converter is unable to adjust the setting further without violating
operating limits on parameters
other than
the one you are controlling, it will
not allow further adjustments.
Example
If the upper power limit is + 15 kW, the load is at 100 Vdc, and the
system is operating in Current Mode, you may only raise the current
setting up to + 150 Adc (150 A
x
100 V = 15 kW). The DC Converter
will not increase current above this level. In addition, because the DC
Converter is controlling at a
power
limit while in Current Mode, the
POWER mode button will flash, while the CURRENT mode button
remains lit.
