Deep Sea Electronics Plc DSE8660 MKII

Commissioning
057-259 ISSUE: 1 Page 130 of 146
Adjustment of Governor SW2
8. Increase the setting of the Nominal Frequency by 2.5 Hz (52.5 Hz or 62.5 Hz)
9. Start the generator. With the breaker open the generator will run at setting of SW1 (50 Hz or 60
Hz).
10. Close the generator breaker onto a DEAD BUS BAR WITH NO LOADS connected. The
generator frequency shall start to increase towards the new Nominal Frequency setting (52.5 Hz
or 62.5 Hz) however it may not achieve this.
11. Adjust SW2 to allow the frequency to increase to the new Nominal Frequency (52.5 Hz or 62.5
Hz)
12. Keep adjusting SW2 further to ensure Governor 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 Frequency by 2.5 Hz (47.5 Hz or 57.5 Hz)
15. Start the generator. With the breaker open the generator will run at setting of SW1 (50 Hz or 60
Hz).
16. Close the generator breaker onto a DEAD BUS BAR WITH NO LOADS connected. The
generator frequency shall start to decrease towards the new Nominal Frequency (47.5 Hz or 57.5
Hz).
17. SW2 is then adjusted further to ensure Governor 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 Frequency back to the actual Nominal Frequency (50 Hz or 60
Hz).