Product overview
EL34xx
26
Version: 1.5
Sign for power measurement
The sign of the (fundamental wave) active power P and the power factor cos φ provides information about
the direction of the energy flow. A positive sign indicates the motor mode, a negative sign indicates
generator mode.
Furthermore, the sign of the fundamental harmonic reactive power Q provides information about the direction
of the phase shift between current and voltage. Fig.
Four-quadrant representation of active/fundamental
harmonic reactive power in motor and generator mode
illustrates this. In motor mode (quadrant I + IV), a
positive fundamental harmonic reactive power indicates an inductive load, a negative fundamental harmonic
reactive power indicates a capacitive load. The information about a capacitive or inductive load behavior is
also shown in the sign of the phase angle φ, which is already contained in the EL3443.
In generator mode (quadrant II & III), an inductive generator is indicated by a positive fundamental harmonic
reactive power, a capacitive generator by a negative fundamental harmonic reactive power.
Since the total reactive power is defined as the quadratic difference between apparent and active power, it
has no sign. For the total active power, signs are permitted, as described above.
Fig. 17: Four-quadrant representation of active power/fundamental harmonic reactive power in motor and
generator mode
Frequency measurement
The EL34xx can measure the frequency for a voltage path input signal and a current path input signal. CoE
objects "Reference" and "Frequency Source" (
frequency is to be output as PDO.
Power quality factor
The EL34xx calculates a PQF (power quality factor), which reflects the quality of the voltage supply as a
simplified analog value between 1.0 and 0.
To calculate this factor, the measured values, frequency, RMS voltage, distortion factor and voltage
imbalance are calculated and combined as shown in the following diagram.
Summary of Contents for EL34 Series
Page 2: ......
Page 52: ...Mounting and wiring EL34xx 52 Version 1 5 Fig 35 Other installation positions ...
Page 58: ...Mounting and wiring EL34xx 58 Version 1 5 EL3453 LEDs and connection Fig 40 EL3453 LED s ...
Page 92: ...Commissioning EL34xx 92 Version 1 5 Fig 86 Incorrect driver settings for the Ethernet port ...
Page 130: ...Commissioning EL34xx 130 Version 1 5 Fig 147 Process Data tab SM3 EL3443 ...
Page 131: ...Commissioning EL34xx 131 Version 1 5 Fig 148 Process Data tab SM3 EL3453 ...
Page 132: ...Commissioning EL34xx 132 Version 1 5 Fig 149 Process Data tab SM3 EL3483 ...
Page 160: ...Commissioning EL34xx 160 Version 1 5 Index F802 PMX Guard Settings ...
Page 183: ...Commissioning EL34xx 183 Version 1 5 Index F802 PMX Guard Settings ...
Page 205: ...Commissioning EL34xx 205 Version 1 5 Index 1C13 TxPDO assign ...
Page 214: ...Commissioning EL34xx 214 Version 1 5 Index F802 PMX Guard Settings ...
Page 242: ...Commissioning EL34xx 242 Version 1 5 Index 1C13 TxPDO assign ...
Page 259: ...Application examples EL34xx 259 Version 1 5 7 Application examples ...