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2857-570/024-001
Functions
26
Product manual | Version: 2.0.0
3-Phase Power Measurement Module, 1 A
4
Functions
The product supports three operating modes:
• Current Measurement
• Voltage Measurement
• Power Measurement
4.1 Measurement Principle
The power measurement module uses seven A/D converters to capture the current and
voltage values of all three phases and the current in the neutral conductor.
4.2 Measured Value Overview
The power measurement module provides the measured AC values of these measured
variables per phase (L
x
, L
y
= L1, L2 or L3).
However, depending on the network topology, not all measured values are always calcu-
lated. For more information, see
8
Communication per Modbus RTU [
Table 14: Measured Value Overview – Voltage
Measured Value
4-wire threephase
network
3-wire threephase
network (ARON)
3-wire threephase
network
2-wire network (sin-
gle phase network)
RMS voltage L1-N
X
–
–
X
RMS voltage L2-N
X
–
–
–
RMS voltage L3-N
X
–
–
–
Max. RMS voltage
L1-N
X
–
–
X
Max. RMS voltage
L2-N
X
–
–
–
Max. RMS voltage
L3-N
X
–
–
–
Min. RMS voltage
L1-N
X
–
–
X
Min. RMS voltage
L2-N
X
–
–
–
Min. RMS voltage
L3-N
X
–
–
–
RMS voltage L1-L2
X
X
X
–
RMS voltage L1-L3
X
X
X
–
RMS voltage L2-L3
X
X
X
–
Arithmetic mean,
voltage L1-N
X
–
–
X
Arithmetic mean,
voltage L2-N
X
–
–
–
Arithmetic mean,
voltage L3-N
X
–
–
–
Peak value voltage
L1-N
X
–
–
X
Peak value voltage
L2-N
X
–
–
X