Commissioning
057-259 ISSUE: 1 Page 132 of 146
Adjustment of AVR SW2
8. Increase the setting of the Nominal Voltage by 10% (230 v to 253 V for example)
9. Start the generator. With the breaker open the generator will run at setting of SW1 (230V for
example).
10. Close the generator breaker onto a DEAD BUS BAR WITH NO LOADS connected. The
generator voltage shall start to increase towards the new Nominal Voltage setting (253V for
example) however it may not achieve this.
11. Adjust SW2 to allow the voltage to increase to the new Nominal Voltage setting (253V for
example)
12. Keep adjusting SW2 further to ensure AVR Drive reads within 75% to 85%, the sign of the drive
(+ or - percentage) does not matter.
13. Stop the Generator
14. Decrease the setting of the Nominal Voltage by 10% (207 V for example)
15. Start the generator. With the breaker open the generator will run at setting of SW1 (230V for
example).
16. Close the generator breaker onto a DEAD BUS BAR WITH NO LOADS connected. The
generator voltage shall start to decrease towards the new Nominal Voltage (207 V for example).
17. SW2 is then adjusted further to ensure AVR Drive reads within 75% to 85%, the sign of the drive
(+ or - percentage) does not matter. Note that any change made to the lower percentage will be
the same for the upper percentage. For example, if the lower percentages from 70% to 75%, the
upper will increase from 80% to 85%.
18. Change the setting of the Nominal Voltage back to the actual Nominal Voltage (230 V for
example).
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