Setup Procedure - MarelliMotori MARK V Manuel Utilisateur

7. SETUP PROCEDURE

Initial settings
With the generator shut down, initially position the regulator potentiometers as indicated in
-
the following figure:
where:
 MIN
 ½

MAX
NOTE: Whenever there is an external potentiometer connected to terminals P and Q, that
potentiometer must be set midway.
By removing
-
protection operates properly for 60 Hz operation mode.
Voltage setting
Start the generator and bring it to nominal speed: the voltage at the output terminals of the
-
generator must be less than the generator's rated voltage.
Turn the VOLT potentiometer clockwise until the generator output voltage reaches a value
-
equal to about the rated voltage.
Setting the under-frequency limiter
Decrease the generator rotation speed to 90% of the nominal speed.
-
Turn the FREQ potentiometer clockwise until the generator voltage starts to decrease below
-
the rated value of the machine.
Return the rotation speed to the nominal value of the machine and check that the
-
generator voltage is at the rated value.
NOTE: This setting allows to set the corner frequency to 45Hz to, for operating frequency of
50Hz.
Improvement of response speed / regulation stability
Improvement of response speed: turn the STAB potentiometer slightly clockwise, being sure
-
you don't reach a generator voltage oscillation or overshoot.
Improvement of regulation stability: turn the STAB potentiometer slightly counter clockwise.
Apply a load to the generator and check the voltage transient.
-
Then, release the load and check the voltage transient.
Repeat the previous points until you reach the regulation stability or response speed desired
-
(which is also obviously related to the type of machine and load given).
963857121_M
VOLT FREQ
MIN MAX
MIN
potentiometer turned completely counter clockwise;
potentiometer about midway;
potentiometer turned completely clockwise.
the bridge which normally shorts the terminals Hz and 60, the speed
STAB
MIN MAX MIN MAX
MIN ½
EN
Mark V M16FA655A
AMP
MIN
MAX
MAX
Marelli Motori
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