4�1�1�- Thd Calculation; 4�1�2�- Maximum Demand - Circutor CVM-C11 Instruction Manual

CVM-C11
Table 14 (Continuation): Measuring parameters of the CVM-C11 (Global)�
Cost - Generation
CO
2
CO
2
No. of hours
4�1�1�- THD CALCULATION
The device can calculate the Total Harmonic Distortion (THD) using the fundamental component of the
signal (THD) or the effective component (RMS) (thd).
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For example, the equations for the calculation of the Total Harmonic Distortion of Voltage are:
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The calculation method to be used by the device is selected in the configuration menu, see
�
CALCULATION"
4�1�2�- MAXIMUM DEMAND
The maximum demand is the average instantaneous measurement over a specific time interval, usually
15 minutes. There are several ways to calculate this parameter:
Fixed Window (by block)
This is the calculation of maximum demand in a specific interval (normally the integration period =
15 minutes). Once the number is calculated, the value is saved and a new calculation for the next 15
minutes begins. The result would be 4 values per hour.
Instruction Manual
Parameter
Emissions - Consumption
Emissions - Generation
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32
2
�
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1
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32
2
�
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1
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Where V
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32
2
�
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32
2
�
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Where V
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P
Fixed Window
Integration period
Figure 28:Fixed window�
P
Sliding window
T1 T2 T3
C C
C C
C C
C C
= Is the fundamental component.
1
= is the effective component (RMS).
RMS
Calculation time
∑
C C
C C
C C
C C
"6.13.- THD
t
41