30
S&C Instruction Sheet 681-530
Programming the Control Settings
Nominal Frequency
The
Nominal Frequency
setting confi gures the overcurrent control for the operating
frequency of the switchgear. To change the switchgear frequency:
STEP 1.
From the
Global Settings
menu, select the frequency setting to match the
system operating frequency. See Figure 26.
Figure 26. Select the nominal frequency from the Global Settings menu.
STEP 2.
Click on the
Save
button. A message will display showing that the setting has
been saved.
Continuous Current
The
Continuous Current
setting confi gures the overcurrent control for the turns ratio
of the switchgear’s current transformers. The turns ratio depends on the continuous
current rating of the switchgear:
Continuous Current, A
Turns Ratio
600
660:1
900/1200
1320:1
To change the
Continuous Current
setting:
STEP 1.
From the
Global Settings
menu, select the continuous current setting to
match the continuous current listed on the switchgear nameplate. See Figure
27.
Figure 27. Select the continuous current from the Global Settings menu.
STEP 2.
Click on the
Save
button. A message will display showing that the setting has
been saved.
