ACS550 User’s Manual 233
Technical Data
Mandatory Circuit Protection
The following setup is essential for safety – it interrupts the main supply in fault
situations involving chopper shorts:
• Equip the drive with a main contactor.
• Wire the contactor so that it opens if the resistor thermal switch opens (an
overheated resistor opens the contactor).
Below is a simple wiring diagram example.
Parameter Set-up
To enable dynamic braking, switch off the drive’s overvoltage control (Set parameter
2005 = 0 (
DISABLE))
ACS550
U1 V1 W1
L1 L2 L3
1
2
3
4
5
6
13
14
3
4
1
2
K1
Q
Thermal switch (standard in
ABB resistors)
On
Off
Fuses
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