5 Calculation formulas
41
Effective apparent distor-
tion power
S
eN
VA
𝑆
𝑒𝑁
= √𝑆
𝑒
2
+ 𝑆
𝑒1
2
where:
𝑆
𝑒1
= 3𝑈
𝑒1
𝐼
𝑒1
𝑈
𝑒1
= √
𝑈
𝐴𝐵1
2
+ 𝑈
𝐵𝐶1
2
+ 𝑈
𝐶𝐴1
2
9
𝐼
𝑒1
= √
𝐼
𝐴1
2
+ 𝐼
𝐵1
2
+ 𝐼
𝐶1
2
3
Total Power Factor
PF
tot
-
𝑃𝐹
𝑡𝑜𝑡
=
𝑃
𝑡𝑜𝑡
𝑆
𝑒
Active energy (consumed
and supplied)
E
P+tot
E
P-tot
Wh
𝐸
𝑃+𝑡𝑜𝑡
= ∑ 𝑃
+𝑡𝑜𝑡
(𝑖)𝑇(𝑖)
𝑀
𝑖=1
𝑃
+𝑡𝑜𝑡
(𝑖) = {
𝑃
𝑡𝑜𝑡
(𝑖) 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) > 0
0 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) ≤ 0
𝐸
𝑃−𝑡𝑜𝑡
= ∑ 𝑃
−𝑡𝑜𝑡
(𝑖)𝑇(𝑖)
𝑀
𝑖=1
𝑃
−𝑡𝑜𝑡
(𝑖) = {
|𝑃
𝑡𝑜𝑡
(𝑖)| 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) < 0
0 𝑓𝑜𝑟 𝑃
𝑡𝑜𝑡
(𝑖) ≥ 0
where:
i
is subsequent number of the 10/12-period measure-
ment window
P
tot
(i)
represents total active power
P
tot
calculated in
i
-th
measuring window
T(i)
represents duration of
i
-th measuring window (in
hours)
Total apparent energy
E
Stot
VAh
𝐸
𝑆𝑡𝑜𝑡
= ∑ 𝑆
𝑒
(𝑖)𝑇(𝑖)
𝑀
𝑖=1
where:
i
is subsequent number of the 10/12-period measurement
window
S
e
(i)
represents the total apparent power
S
e
calculated in
i
-th measuring window
T(i)
represents duration of
i
-th measuring window (in
hours)
Summary of Contents for PQM-700
Page 85: ...85 Notes...
