36
S&C Instruction Sheet 681-530
Programming the Overcurrent Protection Settings
Different TCC families have different setting selections and editable fi elds. Fields that
are not editable will be grey. Selections that are invalid will prompt an error message,
and any cell with an invalid value will be highlighted in yellow after clicking on the
Save
button. An error message will also appear at the top of the screen in red text describing
the error. See the “Warnings Messages” section on page 62 for more information on
warning and error messages.
Select protective settings as follows:
STEP 1.
Select the
Interrupter 1
or
Interrupter 2
option from the
Selection
menu.
STEP 2.
Select the desired
Time Overcurrent Phase Protection
settings. Defi nitions
for the
Time Overcurrent Phase Protection
,
Low-Current Cutoff
,
Defi nite Time 1 and 2
,
Ground Protection, Negative Sequence
, and
Sensitive Earth Fault
settings are available in the “Overcurrent Protection
Setting Defi nitions” section on page 38. A listing of the available
Time
Overcurrent Phase Protection
settings can be found in the “Overcurrent
Control Settings” section on page 56.
For fault interrupters configured for
Three-Phase Tripping
or
Single-Phase Trip/
Three-Phase Lockout
mode, the
Time Overcurrent Ground
,
Negative Sequence
,
and
Sensitive Earth Fault
protection settings can be enabled if required. These features
are disabled by default when shipped from the factory. See Figure 32.
Figure 32. The Time Overcurrent Ground, Negative Sequence, and Sensitive Earth Fault Protection
menu.
STEP 3.
After entering the
Overcurrent Protection
settings, click on the
Save
button.
A confi rmation message will be displayed. See Figure 33.
Figure 33. A Time Overcurrent Phase Protection confirmation message.
