Marathon Electric DVR 2000E - Page 53

S
ection
8
51
Note: If an ammeter is installed, it is recommended that the B phase CT be connected in series through the
regulator CT1 and CT2 terminals. This will provide additional information on the
‘Metering’
screen that can be
very useful for any troubleshooting.
6. Click the
‘Settings’
button in the upper tool bar. On the
‘Setpoint’
tab, under
‘Automatic Voltage
Regulator (AVR)’
enter the voltage in
‘AVR Setpoint (V)’
that the regulator will see when the generator
is operating properly. This is the fi ne voltage adjustment and will either be the generator terminal voltage
or the voltage from the secondary of a transformer. If the unit is to operate at 50 Hz, change the
‘Corner
Frequency (Hz)’
to
‘49’
in the ‘Underfrequency Setting’ section.
7. Click the
‘Gain’
button in the upper tool bar. On the
‘Control Gain’
screen identifi ed in the upper
left, enter the required value in the
‘Stability Range’
area based on the identifi ed frame size from the
following table:
FRAME
SIZE
STABILITY
RANGE
280
21 (see below)
360
1
430
2
570
3
740
4
1000
5
(For 280 frame generators only) In the
‘AVR/FCR’
section in the
‘Proportional Gain KP’
window enter
‘5
3’
. In the
‘Integral Gain KI’
window enter
‘
400’
. In the
‘Derivative Gain KD’
window enter
‘
2’
.
8
. Click the
‘Metering’
button in the upper tool bar. In the
‘Control Mode’
section located in the lower
right of the screen, set the regulator to the
‘FCR’
mode for startup by clicking on the rectangular button
to the right of
‘FCR’
. On the top right, under
‘Setpoint’
, the
‘Current (A)’
window should be green.
Enter
‘0.1’
in this window.
9. Click the
‘EEPROM’
button in the upper tool bar to save the new settings to permanent memory in the
regulator.
10. Click
‘File’
in the top tool bar and pick
‘Save’
. Click
‘Yes’
to save the new settings to a fi le for future
reference.
11. Click
‘Communications’
in the top tool bar and choose
‘Close Comm Port’
.
12. Remove power from the voltage regulator. Connect the regulator to the generator.
13. Start the engine and bring up to speed. Initiate computer communications with the voltage regulator by
following step 3 above.
14. Click the
‘Metering’
button in the upper tool bar. On the
‘Operation’
screen, ensure that the voltages
are balanced on phases
‘Vab’
,
‘Vcb’
and
‘Vca’
. Increase the fi eld current in the
‘Setpoint’
section in
‘Setpoint’ section in ‘Setpoint’
the top right by entering
‘.2’
amps in the
‘Current (A)’
fi eld. Increase the current value in incremental
steps of
‘.2’
amps until reaching rated voltage (approximated) identifi ed in the
‘Voltage (V)’
fi eld to the
left of the
‘Current (A)’
fi eld. (Note:
Do not exceed 1 amp.
Do not exceed 1 amp.
) Insure that all voltages are reading properly
and that the voltage window at the top right of the
‘Metering’
screen has the desired operating voltage
entered.