Multilin SR469 Instruction Manual Download

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S1 SR469 SETUP

4. SETPOINT PROGRAMMING

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4.2.2 PREFERENCES

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FUNCTION:
Some of the SR469 characteristics can be modified to suit different situations. Normally "PREFERENCES" will not require changes.

DEFAULT MESSAGE CYCLE TIME: If multiple default messages are chosen, the SR469 display will automatically cycle through those messages. The time
these messages remain on the display can be changed to accommodate different user reading rates.

DEFAULT MESSAGE TIMEOUT: If no keys are pressed for a period of time then the relay will automatically scan a programmed set of default messages.
This time can be modified to ensure messages remain on the screen long enough during programming or reading actual values. Once default scanning starts,
pressing any key will return the last message viewed to the screen.

AVERAGE MOTOR LOAD CALCULATION PERIOD: The period of time over which the average motor load is calculated may be adjusted with this setpoint.
The calculation is a sliding window and is ignored during motor starting.

TEMPERATURE DISPLAY: Measurements of temperature may be displayed in either Celsius or Fahrenheit. Each Actual Value message where a tempera-
ture value is displayed will be denoted by either '

C' for Celsius, or '

F' for Fahrenheit. RTD Setpoints are always displayed in Celsius.

TRACE MEMORY TRIGGER POSITION: This determines the position of the trigger for waveform capture. The number programmed represents the percent-
age of cycles that will be captured and recorded in the trace memory buffer prior to the trigger (trip).

TRACE MEMORY BUFFERS: This determines the number of traces that will be captured 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: This value represents 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) will average current and PF for the programmed number of cycles using a running average
technique. This setpoint is intended for use on synchronous motors running at low RPMs and driving reciprocating loads. The number of cycles to average
can be determined by using current waveform capture. From viewing this waveform the number of cycles can be determined to complete one stroke. This
value can be used as the starting point for the motor load filter interval. Additional fine tuning may be required.
Warning: This averaging may increase trip/alarm times by 16.7ms for every cycle averaged.

4.2.3

SERIAL PORTS

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