Marathon Electric DVR 2000E - SET-UP from the Computer

S
ection
8
50
SECTION 8 • DVR
®
2000E VOLTAGE REGULATOR
SET-UP FROM THE
COMPUTER FOR
SINGLE UNIT OPERATION
PROCEDURE
The regulator must be powered from an external source into terminals 3 and 4. This power can
be from the
generator PMG with the engine running or a 120 Vac wall outlet.
Before terminals 3 and 4 on the voltage regulator are connected to the PMG, the engine must be set for
1800 RPM for 60 Hz operation or 1500 RPM for 50 Hz operation. If the engine speed goes high the PMG
voltage will also go high, which can damage the voltage regulator.
1. Connect the computer to the voltage regulator with a straight serial cable (no null modem).
2. Ground the regulator with the ground terminal. No other wires should be connected to the regulator at
this time. When power is applied to the regulator, LED 2, Loss of Sensing, should be blinking.
3. Start the DVR
®
2000E computer program on the computer. Click on
‘Communications’
in the top tool bar.
Select
‘Open Comm Port’
from the drop down menu, then move over and click on
‘RS-232 Port’
. In the
Password window, type
‘dvr’
and press
‘Enter’
. The default settings on the
‘Comm Port’
window are
normally acceptable. Press
‘Enter’
to proceed with the default settings. If everything is working
properly, a series of small windows will open to show that information is being uploaded from the voltage
regulator. Every time a screen is changed on the computer, new data will be read from the voltage
regulator to insure that the screen is up to date.
4. Click on
‘File’
in the top tool bar and then click on
‘Save’
in the drop down menu. Click
‘Yes’
to save
the data. In the window that opens, type the name of the fi le that is appropriate for the installation. Click
on
‘Save’
. By saving the data before any changes are made allows the user to refer back to the default
settings if necessary. To print the settings for future reference, click on
‘File’
in the top tool bar and then
click
‘Print’
. Click on the
’Print’
button and fi ll in the requested data to add to the print out to identify the
specifi c unit. Then click
‘OK’
.
Note: For the following steps below for any window on the computer screen that requires data entry (fi elds with
white or green colored background), double clicking on the window will provide a list of the acceptable values.
After a number is changed in a window, press ‘Enter’ to send data to the regulator.
5. The fi rst screen to appear is the
‘System Settings’
screen. In the upper left area of the screen
under the
‘Sensing Voltage’
section, identify whether the
‘Sensing Voltage’ section, identify whether the ‘Sensing Voltage’
generator will be three phase or single phase
by clicking on the circle next to
‘Three Phase’
or
‘Single Phase’
. In the top center under
‘Regulator
Sensing Voltage (V)’
enter the nominal value that the regulator will see on its sensing terminals.
Sensing Voltage (V)’ enter the nominal value that the regulator will see on its sensing terminals. Sensing Voltage (V)’
If
it is connected
to the output leads of the generator it will sense the rated generator voltage. If it is
connected to the midpoint of the generator leads it will sense one-half of the rated generator voltage. If it is
connected to the secondary of a sensing transformer it will sense the secondary voltage of the
transformer. If a sensing transformer is used, enter the ratio of the sensing transformer (480:120 has
a ratio of 4) in the
‘Generator PT Ratio’
w
indow. If a CT is used it must have a secondary rating of 5
amps. Enter the CT ratio (500:5 has a ratio of 100) in the
‘Generator CT Ratio’
window.
‘Generator CT Ratio’ window.‘Generator CT Ratio’