GE 469 Instruction Manual page 114

469
Motor Management Relay
WARNING
5–8
TRACE MEMORY TRIGGER
MESSAGE
POSITION: 25%
TRACE MEMORY BUFFERS
MESSAGE
8x14 cycles
DISPLAY UPDATE
MESSAGE
INTERVAL: 0.4 s
MOTOR LOAD FILTER
MESSAGE
INTERVAL: 0 cycles
Some characteristics can be modified for different situations. Normally this
subgroup will not require changes.
• DEFAULT MESSAGE CYCLE TIME: If multiple default messages are chosen,
the display automatically cycles through those messages. The display time can
be changed to accommodate different user preferences.
• DEFAULT MESSAGE TIMEOUT: If no keys are pressed for a period of time, the
relay automatically scans a programmed set of default messages. This time can
be user-defined to ensure messages remain on the screen for a suitable time
while entering setpoints or actual values. Once default scanning starts, pressing
any key returns the last message viewed.
• AVERAGE MOTOR LOAD CALCULATION PERIOD: This setpoint adjusts the
period of time over which the average motor load is calculated. The calculation
is a sliding window and is ignored during motor starting.
• TEMPERATURE DISPLAY: Temperature measurements may be displayed in
either Celsius or Fahrenheit. Each temperature value is displayed as °C or °F.
RTD setpoints are always displayed in degrees Celsius.
• TRACE MEMORY TRIGGER POSITION: Sets the trigger position for waveform
capture. This value represents the percentage of cycles captured and recorded
in the trace memory buffer prior to the trigger (trip).
• TRACE MEMORY BUFFERS: Sets the number of traces to capture and the
number of cycles for each of the 10 waveforms captured. Note: 10 waveforms
are captured for each trace, showing all currents and voltages.
• DISPLAY UPDATE INTERVAL: Sets the duration for which the metered
current and voltage readings are averaged before being displayed. It does not
affect relay protection or function timing in any way. It can be used to steady
the display when readings are bouncing.
• MOTOR LOAD FILTER INTERVAL: This value (when non-zero) averages
current and power factor for the programmed number of cycles using a running
average technique. This setpoint is intended for use on synchronous motors
running at low RPM and driving reciprocating loads. The number of cycles to
average can be determined by using current waveform capture. The number of
cycles to complete one stroke can be determined from this waveform. This
value can be used as the starting point for the motor load filter interval.
Additional fine tuning may be required. This setpoint is not seen if
is "Variable".
SYSTEM FREQUENCY
This averaging may increase trip/alarm times by 16.7 ms for every cycle
averaged.
http://www.GEindustrial.com/multilin
S1 469 Setup
Range: 1 to 100% in steps of 1
Range:1x64, 2x42, 3x32, 4x35, 5x21,
6x18, 7x16, 8x14, 9x12, 10x11,
11x10, 12x9, 13x9, 14x8, 15x8,
16x7 cycles.
Range: 0.1 to 6.0 s in steps of 0.1
Range: 0 to 32 cycles (0 = OFF) in steps
of 1
NOMINAL
GE Multilin