Product overview
EL34xx
23
Version: 1.5
3.3
Basic function principles
Measuring principle
The EL3443 works with 6 analog/digital converters for recording the current and voltage values of all 3
phases.
Recording and processing is synchronous and identical for the 3 phases. The signal processing for one
phase is described below. This description applies correspondingly for all 3 phases.
Fig. 14: Voltage u and current i curves
RMS value calculation
The RMS value for voltage and current is calculated during the period T. The following equations are used:
u
(t)
: instantaneous voltage value
i
(t)
: instantaneous current value
n: number of measured values
The instantaneous values for current and voltage are low-pass filtered with a cut-off frequency of 2.5 kHz for
the EL3443, EL3423 and EL3483.
Active power measurement
The EL34xx measures the active power P according to the following equation
P: active power
n: number of samples
u
(t)
: instantaneous voltage value
i
(t)
: instantaneous current value
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 ...