Function Description; Measuring Principle; Measured Values - WAGO 750-494 Series Manual

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Function Description

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4 Function Description
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4.1

Measuring Principle

The 3-phase power measurement module operates using 6 analog/digital
converters for acquiring the current and voltage levels in all three phases.
The 3 phases are connected to the current measuring channels of the I/O module
in "single-ended" measurement topology, i.e. all secondary windings of the
current transformers are connected to the common clamp IN. Low pass filters on
the 6 measuring inputs have a limit frequency of 15.9 kHz. Each input signal is
scanned at a frequency of 8 kHz, quantized with 24 bits and further processed
digitally.
Acquisition and processing of the measured values of all three phases is
performed simultaneously in the very same way .
4.2

Measured Values

The 3-phase power measurement module makes the following AC measured
values available per phase (Lx, Ly = L1, L2 or L3):
Voltage:
Current:
Power:
Energy:
750-494 3-Phase Power Measurement Module
• RMS value voltage Lx-N
• Max. RMS value voltage Lx-N
• Min. RMS value voltage Lx-N
• Arithmetic mean value voltage Lx-N
• Peak value voltage Lx-N
• RMS value phase-to-phase voltage Lx-Ly
• RMS value current Lx
• Max. RMS value current Lx
• Min. RMS value current Lx
• Arithmetic mean value current Lx
• Peak value current Lx
• Active power Lx
• Max. active power Lx
• Min. active power Lx
• Reactive power Lx
• Apparent power Lx
• Active energy Lx
• Active energy acquisition Lx
• Active energy delivery Lx
• Active energy total
WAGO-I/O-SYSTEM 750
Manual
Version 1.2.0