REXROTH EcoDrive Cs Project Planning Manual page 104

6-8
Mains and Supply Voltage Connection
I L1C when switching on control
Curve of Inrush Current with Single-Phase Operation
According to the kind of connection (single-phase or three-phase), the
inrush current is of different intensity. The figure below illustrate the test
setup and the basic time flow of the inrush current.
Note : As the curve of the inrush current is not sinusoidal, make sure
you have the appropriate measuring devices when measuring
the current!
Fig. 6-8: Test setup for voltage measurement with single-phase connection
(U = 230 V)
The measurements below illustrate the basic curve of the inrush current
with completely discharged DC bus when switching on the mains voltage.
2 0 0 3 / 0 7 / 0 3 1 3 : 0 1 : 3 0
voltage
S t o p p e d
= F i l t e r =
S m o o t h i n g : O F F
B W : F U L L
Fig. 6-9: I L1C (upper curve) and mains voltage or transformer output (lower
curve) when switching on (time basis: T = 5 ms/div)
Rexroth EcoDrive Cs Drives
N O R M : 2 0 0 k S / s
= O f f s e t = = R e c o r d L e n g t h =
C H 1 : 0 . 0 0 4 V M a i n : 1 0 K M o d e : N O R M A L
C H 2 : 0 . 0 0 3 V Z o o m : 1 0 K T y p e : E D G E C H 1
C H 3 : 0 . 0 0 0 V D e l a y :
C H 4 : 0 . 0 V H o l d o f f : M I N I M U M
DOK-ECODR3-DKC**.3-CS*-PR02-EN-P
5 m s / d i v
( 5 m s / d i v )
C H 1 = 1 0 0 m V
D C 1 : 1
C H 4 = 2 0 V
D C 1 0 : 1
= T r i g g e r =
0 . 0 n s