Bosch Rexroth REFUspeed RS51 - Page 25

REFUspeed RS51 Description 3-5
DOK-RD500*-RS51*******-IB02-EN-P
BW
Supplementary function
EW Ground fault PT
Gl Rectifier
K1 Main contactor
K2 Pre-charging relay
NF Line filter
SE Current sensing
SNT Switched-mode power supply
VL Pre-charging
WS Inverter control
WR Inverter
SF Sinusoidal filter
X80 Start inhibit
BC Braking chopper
X83 Electronic standby
supply
Line supply connection
3 phases
L1 L2 L2 PE
Ext. line contactor
Ext. fuses
FCD
X1
X1
U1 V1 W1 PE
K1
K2
VL
NF
BC
GL
GL
X161
Internal brake
resistor
SNT
WS
WR
SF
SE
EW
Inverter control
X155
DC link
U2 V2 W2 PE
Start inhibit
+24 V
1 2
3 4
X80X83
Standby
1 2
+24 V Ground
Electronics
Standby
Supply
M 3 ~
J
Circuit principle
Electronics section
X2
X4
Fig. 3-3: Circuit principle, power section GK J and K
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