User's Manual

30 Meter Operation
occurs, the status must return to normal for at least 1 second for another power quality
event to be recorded. The meter provides power quality measurements for:
 Voltage (RMS) sag (under voltage): Records the number of voltage sag
occurrences on any one phase. A voltage sag must last continuously for the
time set in the meter Sag/Swell Duration Threshold to be recorded as an
event. The threshold that determines if a voltage sag is recorded, is
configurable as a percentage below the factory-rated voltage. The threshold
range is 1 to 99%. The lowest voltage that occurred during the most recent
sag (after the duration threshold is met) is recorded, as well as the date and
time that the lowest recorded voltage occurred.
The user-configurable Sag/Swell Duration Threshold sets the number of
minutes that a voltage sag or swell must be sustained to be recorded as an
event. A setting of 0 (zero) forces the recording of every detected event. The
range is 0 to 255 minutes.
 Voltage (RMS) swell (over voltage): Records the number of voltage swell
occurrences on any one phase. A voltage swell must last continuously for the
time set in the meter Sag/Swell Duration Threshold to be recorded as an
event. The threshold that determines if a voltage swell is recorded is
configurable as a percentage above the factory-rated voltage. The threshold
range is 1 to 99%. The highest voltage that occurred during the most recent
swell (after the duration threshold is met) is recorded, as well as the date and
time that the highest recorded voltage occurred.
 Over-current (RMS): Records the number of over-current events on any one
phase. The over-current condition must last continuously for 10 seconds to be
recorded as an event. The threshold that determines if an over-current condition
is recorded is configurable as a percentage above the maximum current (as
labeled on the meter cover) on any one phase.
 Power outages: Records the duration, power on date and time, and power off
date/time of the last 10 long power outages. Records a count of all short power
outages. The voltage must be below the internal power outage level and last
longer than the time (in seconds) set in the user-configurable Power Outage
Duration Threshold to be recorded as a long power outage event. The internal
power outage level is permanently set to approximately 74% of the rated voltage.
The range of the Power Outage Time Threshold is 0 to 65,535 seconds. Power
outages that are shorter than the Power Outage Time Threshold, but at least
200 milliseconds (approximately), are counted as a short power outage. If the
Power Outage Duration Threshold is set to 0 (zero) the duration and date/time of
every power outage event longer than approximately 200 milliseconds is
recorded, with complete records for the last 10 long outages. In this case, the
short outage count is not incremented.
 Frequency: The frequency is constantly monitored (except for the first 1 to 2
seconds after power-up) and the maximum and minimum values, since last
reset, are recorded along with the time of the event.
 Phase loss: Records the number of phase loss occurrences on any one phase
as well as the date and time of the last occurrence. Voltage (RMS) drop on
any phase below the internal phase loss level for a sustained duration of 10
seconds is considered a phase loss. The internal phase loss level is set to
approximately 61% of the rated voltage by default, although this figure is
user-configurable as of version 3.1. Since this event can affect the accuracy of
the meter, energy accumulation is automatically reconfigured to exclude the
lost phase. A phase loss error message can be shown on the display if