Load Protection - GE MM3 Instruction Manual

4 SETPOINTS
PATH: SETPOINTS MM S2: PROTECTION MMMM LOAD PROTECTION
UNDERPOWER ALARM
LEVEL: OFF kW
MESSAGE
UNDERPOWER ALARM
MESSAGE
DELAY: 10 s
UNDERPOWER TRIP
MESSAGE
LEVEL: OFF kW
UNDERPOWER TRIP
MESSAGE
DELAY: 10 s
ACCELERATION TIME
MESSAGE
ALARM: OFF s
ACCELERATION TIME
MESSAGE
TRIP: OFF s
LOAD INCREASE ALARM:
MESSAGE
OFF %FLC
UNDERCURRENT ALARM
MESSAGE
LEVEL: OFF %FLC
UNDERCURRENT ALARM
MESSAGE
DELAY: 10 s
UNDERCURRENT TRIP:
MESSAGE
LEVEL: OFF %FLC
GE Power Management
Range: 0.2 to 1100.0 kW or OFF; Step: 0.1 kW
Appears if VT PRIMARY VOLTAGE is not set to OFF. This feature functions the
same as the Underpower Trip feature but produces an alarm indication
instead of a trip.
Range: 1 to 60 seconds; Step: 1 second
Appears if VT PRIMARY VOLTAGE and UNDERPOWER ALARM LEVEL are not
set to OFF. Enter a delay for activation of the Underpower Alarm.
Range: 0.2 to 1100.0 kW or OFF; Step: 0.1 kW
Appears if VT PRIMARY VOLTAGE is not set to OFF. For applications such as
pumps, the Underpower Trip feature or the Undercurrent Trip feature can
be selected to detect loss of load. The advantage of the Underpower Trip
feature is that it allows for more accurate sensing if the loss of load
results in only a small change in current and a power factor shift. If the
power remains below this value while the motor is running for the time
specified in UNDERPOWER TRIP DELAY, the MM3 will trip. Set this value to
OFF if no Underpower Trip is required.
Range: 1 to 60 seconds; Step: 1 second
Appears if VT PRIMARY VOLTAGE and UNDERPOWER TRIP LEVEL are not set
to OFF. Set the UNDERPOWER TRIP DELAY long enough to prevent nuisance
trips from momentary power dips.
Range: 0.5 to 125.0 seconds or OFF; Step: 0.5 second
Enter a time longer than the actual acceleration time of the motor. This is
defined as the length of time required for the average motor current to
drop below Full Load Current after a start command.
Range: 0.5 to 125.0 seconds or OFF; Step: 0.5 second
Enter the maximum allowable acceleration time of the motor. This is
defined as the length of time required for the average motor current to
drop below Full Load Current after a start command.
Range: 10 to 130% FLC or OFF; Step: 1% FLC
Set to a suitable level if a warning is required when motor current is
approaching, or in, an overload condition. When current exceeds this
value, a Load Increase Alarm will occur. Set to OFF if not required.
Range: 10 to 100% FLC or OFF; Step: 1% FLC
This feature functions the same as the Undercurrent Trip feature but
produces an alarm indication instead of a trip.
Range: 1 to 60 seconds; Step: 1 second
Enter the delay for activation of the Undercurrent Alarm.
Range: 10 to 100% FLC or OFF; Step: 1% FLC
For applications such as pumps an Undercurrent Trip can be selected. If
the current remains below this value while the motor is running for the
time specified in the UNDERCURRENT TRIP DELAY, the MM3 will trip. Set this
value to OFF if no Undercurrent Trip is required.
MM3 Motor Manager 3
4.3 S2 PROTECTION

4.3.5 LOAD PROTECTION

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