hager h3+ - Energy Measurements; Measuring Values Averaged over an Interval

496LE005550A
Function of the Energy trip unit
3.3 Measurement function
3.3.6
Energy measurements
The Energy trip unit calculates the various energy levels by integrating the
instantaneous power over a network period.
The Energy trip unit supplies several energy counters which can count up to
4,294,967,295 kWh / kvarh / kVAh. All of these counters provide unsigned absolute
values except for the signed counters. They count the stored energy by increasing
incrementally every second.
The partial energy counters can be reset from the embedded display, the panel
display and the HTP610H configuration tool.
Partial energy counter Symbol Reset
Active energy delivered Ea In,
X
Active energy received Ea Out
X
Reactive energy delivered Er In
X
Active energy received Er Out
X
Absolute active energy
(delivered + received)
Ea abs
X
Absolute reactive energy
(delivered + received)
Er Abs
X
Signed active energy Ea
X
Signed reactive energy Er
X
Apparent energy Es
X
Total energy
counter
Electrical variable Reset
Active energy delivered Ea In NR No reset
Active energy received Ea Out NR No reset
Note
The ErIn, ErOut, Er Abs, Er, Es values depend on the arithmetic or vector addition
convention for reactive or apparent power (see configuration, see § 3.3.10).
3.3.7
Demand values (averaged
values over an interval)
The Energy trip unit calculates the averaged current and power values by integration
over a given time interval. These are the Demand values or the averaged values
over an interval. These values are useful in order to create a load profile for the
loads supplied by the Energy circuit breaker. They must not be confused with the
instantaneous averages (Instantaneous average current, etc.).
Calculation principle
The Energy trip unit calculates a value averaged (Demand value) out over an interval
using the electrical measurement G over a time interval T divided by this same
interval T.
The time interval T designates the configurable integration interval.
There are 3 types of integration interval:
- Fixed integration interval
- Sliding integration interval