U
SER MANUAL
–
ENERIUM
100/200/300
MS1-7352 ENERIUM100/200/300_ Ed04 User Manual
Page 78 / 86
22.11.2 For currents
∑
×
=
5
1
]
10
[
5
1
]
1
[
T
FC
s
FC
IL
IL
For F = 50Hz OR
∑
×
=
5
1
]
12
[
5
1
]
1
[
T
FC
s
FC
IL
IL
For F = 60Hz
With:
]
10
[
]
10
[
]
10
[
T
I
T
Ipeak
T
FC
IL
=
And:
]
12
[
]
12
[
]
12
[
T
I
T
Ipeak
T
FC
IL
=
With:
∑
×
=
1280
1
2
1280
1
]
10
[
L
i
T
I
And:
∑
×
=
1536
1
2
1536
1
]
12
[
L
i
T
I
•
With:
)]
i
(
abs
max[
]
T
[
Ipeak
L
=
10
•
And:
)]
i
(
abs
max[
]
T
[
Ipeak
L
=
12
•
L = 1, 2, 3
22.12 Tan(
φ
)
The monitors measure Tan(
φ
) globally "averaged over a second".
Each of these quantities is associated with a quadrant. If P
[1s] and Q
[1s] (Three-phase quantity) have
the same sign, then the quadrant is inductive, otherwise it is capacitive.
]
1
[
]
1
[
]
1
)[
(
s
P
s
Q
s
tg
g
=
ϕ
22.13 Frequency
Measurements are derived from “10 period" real power measurements for a system set at 50 Hz and
"12 period" real power measurements for a system set at 60 Hz. The formulae are:
•
F[1s] = Sampling_F x
•
•
With the following constraint: Sampling_F = 128 * F[1s]
22.14 Harmonics
The monitors measure the harmonic rates Hx "averaged over a second" order by order on the three
phase voltages V1, V2, V3, the three line voltages U12, U23, U31 and three currents I1, I2, I3 in
accordance with IEC 61000-4-7 (Edition 2). The measurements are derived from the hx[10T]
harmonics, according to the following formula:
•
When the phase voltage, line voltage or the current is 0, then the harmonic distortion of the quantity
involved is not calculated and is 0.
ENERIUM 50s measure this up to order 25; ENERIUM 150s up to order 50.
22.15 Total harmonic distortion
The monitors measure the total harmonic distortion "averaged over a second" for the three phase
voltages THD
V1
[1s], THD
V2
[1s] and THD
V3
[1s], the three line voltages THD
U12
[1s], THD
U23
[1s] and
THD
U31
[1s], as well as for the three currents THD
I1
[1s], THD
I2
[1s] and THD
I3
[1s], as defined by IEC
60050-551-20.
Number_of_Samples_over_10T
10T
