Operating Instructions Z-D-15/35/55E-..
Installation instructions
__________________________________________________________
_________________________________________________________________________________
L-BAL-E321-GB 2021/11 Index 002
20/44
5.3.1
EMC directive
Compliance with the EMC directive is only given if the active harmonic filter is connected directly to the
main power supply.
If the active harmonic filter is built into a system or combined with other products, the manufacturer of
the system / operator of the device is responsible for compliance with the EMC directive according to
the locally applicable standards.
5.3.2
Voltage supply
The voltage supply must match the information on the rating plate (see technical data).
The voltage supply must comply with the EN 50160 quality characteristics and the defined standard
voltages of IEC 60038!
Remarks for connection of CT (current transformer):
Routing of wires:
The wires between the active harmonic filter and current transformers must be
twisted pair cables. A correct function is only possible if the wiring matches exact the diagram below. If
wires are interchanged, the harmonics will not be reduced but amplified. To avoid interchanging of wires
it is strongly recommended not to use any wire colour twice.
Wire cross section:
The cross section of the wires has a significant influence on the quality of the
control. Is the cross section to small in relation to the length of the wire, the resulting measurement
within the active harmonic filter will be too small to achieve a good control quality and good reduction of
harmonics.
𝐴 =
2×𝑑×𝑣×𝐼²×𝜌
𝑆
The following values needed to be known:
-
S = Power of the current transformer (30 A - 80 A typical 1.5 VA,
≥ 100 A typical 2.5 VA )
-
d = Distance (length of cableway) between active harmonic filter and current transformer
-
v = Twisting factor (typical 1,5)
-
I = secondary current of the current transformer ( typical 5 A)
-
ρ = Rho = specific resistance of copper (
0,01786
𝑂ℎ𝑚∗𝑚𝑚²
𝑚
)
-
Example:
𝐴 =
2×2 𝑚×1,5×5
2
×0,01786 𝑂ℎ𝑚×𝑚
2,5 𝑉𝐴 ×𝑚𝑚²
= 1,07 𝑚𝑚²
Wiring type:
At 3W3P (installation of two current transformers) the neutral must not be connected to
the active harmonic filter. It is mandatory that the physical installation must match the adjusted method
in the software of the active harmonic filter. If this is not observed, the reduction of harmonics is not
optimal.
