What the Eagle™ Records
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There are no settings for daily profiles. All available daily profiles
in Eagle recorders are always enabled, regardless of the settings
for any other record types. Memory does not run out for a daily
profile; it just keeps averaging as long as the recording session
lasts (there is a practical limit of about a year).
The Eagle records a profile for voltage, current, real power,
reactive power, apparent power, power factor, voltage THD,
current THD, and phase angle.
Suggested Uses
Daily profiles are typically used to profile or characterize a
parameter, such as average load current or power factor. Since
the profile is supposed to reflect average line conditions, the more
loads included in the recording, the better the average. Monitoring
a single small load such as a small office building will not create a
very good profile of distribution line conditions (such as distribution
line power factor), since the building would be a small part of the
total distribution load. Voltage is somewhat of an exception in that
anywhere can be good place to create a profile: every other load
(at least those nearby) will see the same distribution line voltage.
The ideal location for creating power factor profiles is where a
capacitor bank would be placed to correct power factor.
The voltage daily profile is normally used to identify voltage
regulation problems, or other steady-state low/high voltage issues.
The current profile can be used to identify daily trends in load
current. This is also possible with the apparent power profile.
Power factor and reactive power profiles can be used to set
capacitor bank timers to correct for power factor only when
necessary during the day. The voltage and current THD profiles
show when harmonic distortion is present during the day.
The more days the Eagle records, the better the average created
by the profile. A recording session that just lasts a single day
does not incorporate any daily averaging at all. Since a profile
starts with all zeros, a recording session that does not even last
24 hours will include some 15-minute blocks with the data still
zeroed. A recording session that does not even last 15 minutes
will have all zeroes for a daily profile.
