Underpower - GE Multilin 369 Quick Start Manual

S8 POWER ELEMENTS
4.6.6

Underpower

UNDERPOWER
4–46
PATH: S8 POWER ELEMENTS
BLOCK UNDERPOWER
FROM START: 1 s
UNDERPOWER
ALARM: Off
ASSIGN ALARM RELAYS:
Alarm
UNDERPOWER ALARM
LEVEL: 2 kW
UNDERPOWER
ALARM DELAY: 1 s
UNDERPOWER
ALARM EVENTS: Off
UNDERPOWER
TRIP: Off
ASSIGN TRIP RELAYS:
Trip
UNDERPOWER TRIP
LEVEL: 1 kW
UNDERPOWER
TRIP DELAY: 1 s
If enabled, a trip or alarm occurs when the magnitude of three-phase total real power falls
below the pickup level for a period of time specified by the delay. The underpower element
is active only when the motor is running and will be blocked upon the initiation of a motor
start for a period of time defined by the
this block may be used to allow pumps to build up head before the underpower element
trips or alarms). A value of 0 means the feature is not blocked from start; otherwise the
feature is disabled when the motor is stopped and also from the time a start is detected
until the time entered expires. The pickup level should be set lower than motor loading
during normal operations.
Underpower may be used to detect loss of load conditions. Loss of load conditions will not
always cause a significant loss of current. Power is a more accurate representation of
loading and may be used for more sensitive detection of load loss or pump cavitation. This
may be especially useful for detecting process related problems.
CHAPTER 4: KEYPAD SETPOINTS
UNDERPOWER
Range: 0 to 15000 s in steps of 1
Range: Off, Latched, Unlatched
Range: None, Alarm, Aux1, Aux2 or combinations
Range: 1 to 25000 kW in steps of 1
Range: 0.5 to 255.0 s in steps of 0.5
Range: Off, On
Range: Off, Latched, Unlatched
Range: None, Trip, Aux1, Aux2, or combinations
Range: 1 to 25000 kW in steps of 1
Range: 0.5 to 255.0 s in steps of 0.5
BLOCK UNDERPOWER FROM START
369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
setpoint (e.g.