Siemens SIMODRIVE 611 universal - Page 591

6
6.11 Motor changeover for induction motors (from SW 2.4)
6-591
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
SIMODRIVE
611
universal
U2 V2 W2
Υ/∆
changeover
Input terminal
I8 (Fct. No. 6)
Output terminals
O9 (Fct. No. 13)
O8 (Fct. No. 11)
K
2H
K
1H
P24
Pulse
enable
PE
K1
K1 K2
1PH
Υ/∆
U1 V1 W1
U2 V2 W2 U2 V2 W2
K
x
1)
0 V
K
1H
K
2H
∆ operation
K2
Υ operation
P24
0 V
K1 K2K
x
1)
T. 663
of
PLC
1) A safe operating stop is not guaranteed by just opening K1 and K2.
This is the reason that for safety–related reasons, contactor
K
x
should be used to provide electrical isolation. This contactor may only be switched–in the
no–current condition, i.e. the pulse enable must be withdrawn 40 ms before the
contactor is opened (de–energized).
K2 K1
1 signal ––> ∆
operation
0 signal ––> Υ
operation
Fig. 6-81 Recommended circuit: Changing over a motor in star/delta operation
Notice
Main contactors K1 and K2 must be switched in the no–current
condition.
If this is not observed, the drive converter and contactors could be
destroyed.
6 Description of the Functions
01.99
04.99
! not 611ue !