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STARTING UP
If a replacement AVR has been fitted, or the re-setting of the voltage adjustment is required, please
proceed as follows:
1. Connect the wires coming from the alternator according to the description in the CONNECTION
DIAGRAMS and the type of alternator to be used.
2. Before running alternator, turn the volts trimpot “V” fully anti-clockwise.
3. Turn remote volts potentiometer (if fitted) to midway position.
4. Turn stability trimpot “ST” to midway position.
5. Connect a suitable voltmeter (0-300V ac) across line to neutral of the alternator.
6. Start alternator set, and run on no load at nominal frequency e.g. 50-53Hz or 60-63Hz.
7. Carefully turn volts trimpot “V” (or external pot, if fitted) clockwise until rated voltage is reached.
8. If instability is present at rated voltage, refer to stability adjustment, and then re-adjust voltage if
necessary.
TURNING OFF
With the U/F protection properly configured, turning off the alternator is done by turning off the
primary mover.
TESTING WITHOUT ALTERNATOR
The figure below shows the connection diagram for AVR testing without alternator, where the
equipment can be verified for proper operation. Changing input voltage in the range 150 -230V ac
the lamp will light. The voltage of the lamp should be the same as the voltage applied on input.
Testing AVR BL4-U without a alternator
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