Power Electronics SIEMENS 6GA-2491, User Manual

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ELECTRONICS
OWER
P
INSTRUCTIONS TO INSTALLING
AND ADJUSTING THE AVR
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MODELS: SIEMENS 6GA-2491 COMPATIBLE
STAB - Stability. It eliminates the voltage fluctuations.
To adjusting the STAB trimmer, proceed as follows :
1. Turn anti-clockwise the STAB trimmer all the way (1 turn).
2. Turn clockwise the STAB trimmer and set it just after the voltage
fluctuation stops.
* Setting the trimmer at a far clockwise position will decrease the
generator sensitivity. This may result to extensive voltage recovery
time due to the vast self-induction loads .
VOLT - Voltage. Voltage adjustment. It co-operates with the external pot.
To adjusting the VOLT trimmer, proceed as follows:
Since the engine has the right-periods (cycles), then the remote knob is adjusted to the middle position.
Then the VOLT trimmer (which is located in the main unit) is adjusted until the right voltage is reached.
All the above adjustments i.e. U/S, STAB, VOLT, must be done without any load in the generator,
the switch (ACB) must be in OFF position.
P/F - Power Factor . This adjustment is done when the generator is already in parallel with another or others.
To adjusting the P/F trimmer proceed as follows:
We start by placing the trimmer to the middle position.
If turning it anti-clockwise, the amperes of generator build-up in relation to the other generator.
If the trimmer is moved in a clockwise manner, the amperes are reduced in relation to the other
or others generators .
CONNECTING EXTERNAL VOLTAGE POTENTIOMETER
Our 6GA-2491 design requires the value of the external potentiometer to be 500 Ohms.
Please replace the original potentiometer with our supplied one using the same wires of the original potentiometer.
Note that the original pre-installable potentiometer of 5000 Ohm does NOT work with our compatible AVR.
1. If there IS an external potentiometer pre-installed in the circuit ,
the terminals S - T located on the AVR remains unconnected (default state).
2. If there is NO potentiometer installed at all ( either the original of 5000 Ohms or ours of 500 Ohms )
then you must short circuit the terminal S - T located on the AVR.
BLUE LED
The blue led is a “power on” indication led.
RED LED
The red led located left of the three trimmers is an “out of adjustment” capability indication led.
This could happen if the generation frequency is lower, or if the engine shuts off or if there is a malfunction of
the responsible systems of building the voltage around 600V and the generator voltage is lower than the
voltage we trying to set. This is happening because the 6GA-2491 can only subtract voltage.
ONE TURN TRIMMER
THE CLOCKWISE
TURNING OF STAB
ADDING STABILITY BUT
THE GEN HAS SLOWER
VOLTAGE RECOVERY.
THE ANTI-CLOCKWISE
TURNING OF STAB
DECREASE STABILITY BUT
THE GEN HAS FASTER
VOLTAGE RECOVERY.
( PRE-ADJUSTED TO THE POSITION YOU SEE HERE)
STABILITY