Description Of Measured Values - WAGO 750-494 Series Manual

32 Function Description
Rotary field:
Limit values:
Harmonics!
In general, the first harmonic means the fundamental wave and the second
harmonic means the wave with double frequency etc.!
Alternatively, the following DC measured values are available if DC
measurement has been activated in the I/O module. See section "Commissioning"
> "Configuration with WAGO-I/O-CHECK".
DC measurements only possible in 2 measuring channels!
DC measurements are only possible in the measuring channels L1-IL1 and L2-
IL2!
Voltage:
Current:
Power:
4.3

Description of Measured Values

Calculating the RMS Values for Current and Voltage
The I/O module measures the true RMS of the voltages and currents applied to
the measurement inputs per period. See figure below.
I
=
1
eff
N
i : Sampling value of current
k
u : Sampling value of voltage
k
• Direction of rotation
• Undervoltage Lx
• Overvoltage Lx
• Overcurrent Lx
• DC voltage Lx-N
• DC current Lx
• Power (DC current) Lx
N-1
∑
2
i
k
k = 0
750-494 3-Phase Power Measurement Module
N-1
∑
2
U u
=
1
eff k
N
k = 0
I : RMS value of the current
eff
U : RMS value of the voltage
eff
WAGO-I/O-SYSTEM 750
Manual
Version 1.2.0