Siemens MCC-3298 - Manual (Page 36)

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3 Operating the SAMMS-LV Device
b.When phase unbalance protection is disabled (OFF), the
Phase Unbalance LED remains off, unbalanced condi-
tions have no effect on protection, and F17 (Display
Unbalanced Current) displays OFF.
2. To change the setting, you must be in program mode.
3. To change the setting, press the UP or DOWN key to display
the setting options, then press ENTER to select the setting
that is shown. The display blanks while the ENTER key is
pressed.
4. Repeat Step 3 if you select an incorrect setting.
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.
6. Press the (F)unction key to go to other functions.
F10 - Display Time to Restart
1. Press the LIST key to view the time remaining before the
motor can be restarted. The time is displayed in seconds.
While the motor is cooling, the time to restart counts down
from the maximum winding temperature allowed to the
steady-state, full-load temperature. The display is always
zero if the motor is not in a start inhibit mode. If a time to
restart displays, the motor can only be restarted by an
emergency restart (see F11).
2. The UP, DOWN, and ENTER keys are disabled.
3. Press the (F)unction key to go to other functions.
F11 - Emergency Restarting
1. Press the LIST key to view the emergency restart setting (ON
or OFF). The factory default is OFF. With emergency restart
enabled (ON), you can restart the motor after the overload
relay is reset (manually or automatically), even when the time
to reset is not zero. When you initiate an emergency restart,
the motor conditions are reset to zero to simulate a com-
pletely cold start. The emergency restart function is auto-
matically disabled after any restart (emergency or normal),
and you must manually re-enable the emergency restart
function by setting F11 to ON.
2. Emergency restart can be enabled in either the program
mode or the display mode.
3. To change the setting, press the UP or DOWN key to display
the setting options, then press ENTER to select the setting
that is shown. If the selected setting is ON, skip to Step 5.
4. If the selected setting is OFF, the display blanks while the
ENTER key is pressed. When the ENTER key is released, the
setting is changed to OFF. Skip to Step 6.
5. If the selected setting is ON, “SUrE” is displayed when you
release the ENTER key. Press ENTER again to make the
change to ON.
Note: The motor can be damaged if restarted before it is
allowed to cool. The “SUrE” display allows you to reconsider
your actions before pressing the ENTER key a second time
to select the ON setting.
6. Repeat Step 3 if you select an incorrect setting.
7. If you are in the program mode, press and hold the (F)unction
key for several seconds to exit. The display will show “Prog.”
Press the UP or DOWN key to change to the display mode.
8. Press the (F)unction key to go to other functions.
F12 - Ground Fault Protection or Warning
1. Press the LIST key to view the active ground fault detection
setting (ON or OFF). The factory default setting is warning
(OFF), and the other setting is protection (ON).
a. When warning (OFF) is selected, the Ground Fault LED
flashes if the ground current increases beyond the pickup
level. The LED stops flashing as soon as the current drops
below the pickup level.
b.When protection (ON) is selected, a ground current above
the pickup level will cause a trip. The motor stops, and the
Ground Fault LED is steadily lit. You must reset the unit
before the motor can be restarted.
2. To change the setting, you must be in program mode.
3. To change the setting, press the UP or DOWN key to display
the setting options, then press ENTER to select the setting
that is shown. The display blanks while the ENTER key is
pressed.
4. Repeat Step 3 if you select an incorrect setting.
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.
6. Press the (F)unction key to go to other functions.