
6
Operating modes and limit values
Special application
Operating Instructions – EDR..71 – 315, EDRN63 – 315
116
Line voltage V
line
The line voltage is determined via direct measurement with multimeter or, alternat-
ively, by reading off the DC link voltage (V
DC link
) in the inverter (
V
V
line
DC link
=
/ 2
).
Voltage drop at the line choke Δ U
line choke
The voltage drop can be calculated in 2 ways:
•
Calculation based on an equation
•
Calculation based on table values
Both ways are illustrated below.
Calculation based on an equation
The extent of the voltage drop is determined by the main inductance and the ohmic
share of the inductance.
Typical connection pattern
U1
V1
W1
PE
U2
V2
W2
Equation for calculating the voltage drop
∆
V
I
f
L
R
LC
FI
LC
LC
=
×
×
×
×
×
+
I_
(
)
3
2
2
2
π
L
ND
Inductance of the line choke in H
R
ND
Ohmic resistance of the line choke in Ω
ΔU
ND
Voltage drop across line choke in V
I
I_FI
Nominal input current of the inverter
For the inductance L and the ohmic resistance R of the inductance, refer to the docu-
ments for the line choke.
25896334/EN – 06/2019
Содержание EDR200
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