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10.14 Measurement process
Efficiency Values
𝑋
𝑟𝑚𝑠
= √
∑
𝑁
𝑘=1
𝑥
2
𝑘
𝑁
Avergage Values
𝑋
𝑚𝑒𝑎𝑛
=
1
𝑁
𝑁
∑
𝑘=1
𝑥
𝑘
Active Powers
𝑃 =
1
𝑁
𝑁
∑
𝑘=1
𝑉
𝑘
∗ 𝑖
𝑘
Apparent Powers
𝑆 = 𝑈 ∗ 𝐼
Reactive Powers
𝑄 = √𝑆
2
− 𝑃
2
Power Factor
𝐹 𝑃 =
𝑃
𝑆
Peak Factor
𝐹
𝑐
=
𝑋
𝑝𝑒𝑎𝑘
𝑋
𝑅𝑀𝑆
Total Harmonic Distortion
𝑇 𝐻𝐷 =
√
√
√
⎷
𝑋
2
𝑡
− 𝑋
2
𝑓𝑢𝑛𝑑
𝑋
2
𝑓𝑢𝑛𝑑
Distortion Factor
𝐷𝐹 = √
𝑋
2
𝑡
− 𝑋
2
𝑓𝑢𝑛𝑑
𝑋
2
𝑡
Total Active Power
𝑃
𝑇
= 𝑃
1
+ 𝑃
2
+ 𝑃
3
Total Reactive Power
𝑄
𝑇
= 𝑄
1
+ 𝑄
2
+ 𝑄
3
Total Apparent Power
𝑆
𝑇
= √𝑃
2
𝑇
+ 𝑄
2
𝑇
Total Voltage
𝑈
𝑇
= √
𝑈
2
1
+ 𝑈
2
2
+ 𝑈
2
3
3
Total Intensity
𝐼
𝑇
= 𝐼
1
+ 𝐼
2
+ 𝐼
3
Power Factor
𝐹 𝑃
𝑇
=
𝑃
𝑡
𝑆
𝑡
Energy
cumulative value of power P; this value is reset in the Visualization page.
Attention
: the maximum value of energy during the data acquisition is restricted to E= Pn*H, where Pn = nominal
power H = 12 hours.
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