32 S&C Instruction Sheet 1041-540
Overcurrent Fault Protection
The data-logging screens show high and low values and trend data for voltage and current
amplitude, phase, and related parameters. When a customer complains of a service outage
or low voltage, the information on the
DATA LOGGING
screens can help you determine
what happened and why it happened.
View the Daily Highs and Lows Data
Click the
Data Logging
button on any screen to open the
DATA LOGGING MENU
screen,
and then click the button for the time period that contains the day to be viewed. Then, if
necessary, click on the
PgUp
and
PgDn
buttons to move to the correct day.
Routine Data-Logging
Information
Figure 8. One of the
DATA LOGGING: Daily Highs and Lows
screens (5801 control is
shown)
Each
DATA LOGGING: Daily Highs and Lows
screen shows the highest and lowest
voltage and current, along with associated power factor, kvar, and kW values, for each
switch for a 24-hour period (12 midnight to 12 midnight). See Figure 8. The high/low data
for today and for each of the preceding 7 days can be viewed.
The switch control records the voltage on all three phases when any one phase is
higher/lower than the previous high/low recorded on any phase.
The switch control also records the current on all three phases, based on the average
three-phase current. In addition, when a new daily high or low occurs, it records the
power factor per phase, kvars per phase and total), and total kW at that time.
Each displayed value is the 1.6-second averaged value for that parameter. To obtain a
1.6-second averaged value, the switch control samples the data every 0.2 seconds. It then
adds together eight consecutive samples and divides the total by eight.